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Author Céréghino, R.; Françoise, L.; Bonhomme, C.; Carrias, J.-F.; Compin, A.; Corbara, B.; Jassey, V.; Leflaive, J.; Rota, T.; Farjalla, V.; Leroy, C.
Title Desiccation resistance traits predict freshwater invertebrate survival and community response to drought scenarios in a Neotropical ecosystem Type Journal Article
Year 2020 Publication Ecological Indicators Abbreviated Journal Ecol. Indic.
Volume 119 Issue 106839 Pages
Keywords (up) Climate change; Functional traits; Lt50; Macroinvertebrates; Rainforests; Biodiversity; Climate change; Driers (materials); Drought; Environmental management; Population statistics; Tanks (containers); Water; Aquatic invertebrates; Climate change adaptation; Controlled conditions; Environmental managers; Freshwater biodiversity; Freshwater invertebrates; Future climate scenarios; Laboratory conditions; Aquatic organisms; aquatic community; biodiversity; climate change; cuticle; desiccation; drought stress; invertebrate; Neotropical Region; population size; survival; French Guiana; Invertebrata
Abstract The intensification of dry seasons is a major threat to freshwater biodiversity in Neotropical regions. Little is known about resistance to drying stress and the underpinning traits in Neotropical freshwater species, so we don't know whether desiccation resistance allows to anticipate shifts in biological diversity under future climate scenarios. Here, we used the aquatic invertebrates that live in the rainwater-filled leaves of tank bromeliads, to examine the extent to which desiccation resistance of species measured in the laboratory predicts community response to drought intensification in nature. We measured desiccation resistance in 17 invertebrate species (>90% of the biomass usually found in bromeliads of French Guiana) by recording the median lethal time (LT50) of experimental populations exposed to controlled conditions of residual moisture. In the field, we placed rainshelters above tank bromeliads to emulate drought scenarios ranging from the ambient norm to IPCC scenarios and extreme events, and we recorded the response of functional community structure. LT50 ranged from 4.18 to 19.06 days, and was related to cuticle content and dry body mass. Among other functional indicators that represent strategies to optimize resource use under stressful conditions (e.g., habitat use, trophic specialization), LT50 was the best predictor of community structure responses along a gradient of emulated drought intensities. Therefore, species’ LT50s measured under laboratory conditions can be used to forecast aquatic community response to drying stress in nature. Anticipating how species will cope with drought has never been more important for environmental managers to support climate change adaptation. We show that desiccation resistance in freshwater invertebrates is a key indicator of potential population size and local–global range shifts, and this could be especially true in the Neotropics where species have narrow physiological tolerances for climatic variation. © 2020 Elsevier Ltd
Address ECOFOG, AgroParisTech, CIRAD, CNRS, INRA, Université de Guyane, Université des Antilles, Campus Agronomique, Kourou, 97379, France
Corporate Author Thesis
Publisher Elsevier B.V. Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1470160x (Issn) ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number EcoFoG @ webmaster @ Serial 941
Permanent link to this record
 
 
Author Fargeon, H.; Aubry-Kientz, M.; Brunaux, O.; Descroix, L.; Gaspard, R.; Guitet, S.; Rossi, V.; Herault, B.
Title Vulnerability of commercial tree species to water stress in logged forests of the Guiana shield Type Journal Article
Year 2016 Publication Forests Abbreviated Journal Forests
Volume 7 Issue 5 Pages
Keywords (up) Climate change; Growth rates; Mortality rates; Paracou; Selective logging
Abstract The future of tropical managed forests is threatened by climate change. In anticipation of the increase in the frequency of drought episodes predicted by climatic models for intertropical regions, it is essential to study commercial trees' resilience and vulnerability to water stress by identifying potential interaction effects between selective logging and stress due to a lack of water. Focusing on 14 species representing a potential or acknowledged commercial interest for wood production in the Guiana Shield, a joint model coupling growth and mortality for each species was parametrized, including a climatic variable related to water stress and the quantity of aboveground biomass lost after logging. For the vast majority of the species, water stress had a negative impact on growth rate, while the impact of logging was positive. The opposite results were observed for the mortality. Combining results from growth and mortality models, we generate vulnerability profiles and ranking from species apparently quite resistant to water stress (Chrysophyllum spp., Goupia glabra Aubl., Qualea rosea Aubl.), even under logging pressure, to highly vulnerable species (Sterculia spp.). In light of our results, forest managers in the Guiana Shield may want to conduct (i) a conservation strategy of the most vulnerable species and (ii) a diversification of the logged species. Conservation of the already-adapted species may also be considered as the most certain way to protect the tropical forests under future climates. © 2016 by the authors.
Address Université de Yaoundé I, UMMISCO (UMI 209), Yaoundé, Cameroon
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Export Date: 11 June 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 682
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Author Zalamea, P.C.; Munoz, F.; Stevenson, P.R.; Paine, C.E.T.; Sarmiento, C.; Sabatier, D.; Heuret, P.
Title Continental-scale patterns of Cecropia reproductive phenology: evidence from herbarium specimens Type Journal Article
Year 2011 Publication Proceedings Of The Royal Society B-Biological Sciences Abbreviated Journal Proc. R. Soc. B-Biol. Sci.
Volume 278 Issue 1717 Pages 2437-2445
Keywords (up) climate seasonality; reproductive patterns; Fourier spectral and cospectral analyses; herbarium collections; Neotropics; pioneer plants
Abstract Plant phenology is concerned with the timing of recurring biological events. Though phenology has traditionally been studied using intensive surveys of a local flora, results from such surveys are difficult to generalize to broader spatial scales. In this study, contrastingly, we assembled a continental-scale dataset of herbarium specimens for the emblematic genus of Neotropical pioneer trees, Cecropia, and applied Fourier spectral and cospectral analyses to investigate the reproductive phenology of 35 species. We detected significant annual, sub-annual and continuous patterns, and discuss the variation in patterns within and among climatic regions. Although previous studies have suggested that pioneer species generally produce flowers continually throughout the year, we found that at least one third of Cecropia species are characterized by clear annual flowering behaviour. We further investigated the relationships between phenology and climate seasonality, showing strong associations between phenology and seasonal variations in precipitation and temperature. We also verified our results against field survey data gathered from the literature. Our findings indicate that herbarium material is a reliable resource for use in the investigation of large-scale patterns in plant phenology, offering a promising complement to local intensive field studies.
Address [Zalamea, PC; Sabatier, D] IRD, UMR AMAP, F-34000 Montpellier, France, Email: camilozalamea@gmail.com
Corporate Author Thesis
Publisher Royal Soc Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0962-8452 ISBN Medium
Area Expedition Conference
Notes WOS:000292592000005 Approved no
Call Number EcoFoG @ webmaster @ Serial 328
Permanent link to this record
 
 
Author Fu, Z.; Gerken, T.; Bromley, G.; Araújo, A.; Bonal, D.; Burban, B.; Ficklin, D.; Fuentes, J.D.; Goulden, M.; Hirano, T.; Kosugi, Y.; Liddell, M.; Nicolini, G.; Niu, S.; Roupsard, O.; Stefani, P.; Mi, C.; Tofte, Z.; Xiao, J.; Valentini, R.; Wolf, S.; Stoy, P.C.
Title The surface-atmosphere exchange of carbon dioxide in tropical rainforests: Sensitivity to environmental drivers and flux measurement methodology Type Journal Article
Year 2018 Publication Agricultural and Forest Meteorology Abbreviated Journal Agric. For. Meterol.
Volume 263 Issue Pages 292-307
Keywords (up) Climate variability; Ecosystem respiration; Eddy covariance; Gross primary productivity; Net ecosystem carbon dioxide exchange; Tropical rainforest; acclimation; air temperature; anthropogenic effect; atmosphere-biosphere interaction; biodiversity; carbon flux; climate change; Cmip; eddy covariance; environmental change; flux measurement; methodology; net ecosystem exchange; net ecosystem production; radiative forcing; rainforest; sensitivity analysis; tropical environment
Abstract Tropical rainforests play a central role in the Earth system by regulating climate, maintaining biodiversity, and sequestering carbon. They are under threat by direct anthropogenic impacts like deforestation and the indirect anthropogenic impacts of climate change. A synthesis of the factors that determine the net ecosystem exchange of carbon dioxide (NEE) at the site scale across different forests in the tropical rainforest biome has not been undertaken to date. Here, we study NEE and its components, gross ecosystem productivity (GEP) and ecosystem respiration (RE), across thirteen natural and managed forests within the tropical rainforest biome with 63 total site-years of eddy covariance data. Our results reveal that the five ecosystems with the largest annual gross carbon uptake by photosynthesis (i.e. GEP > 3000 g C m−2 y-1) have the lowest net carbon uptake – or even carbon losses – versus other study ecosystems because RE is of a similar magnitude. Sites that provided subcanopy CO2 storage observations had higher average magnitudes of GEP and RE and lower average magnitudes of NEE, highlighting the importance of measurement methodology for understanding carbon dynamics in ecosystems with characteristically tall and dense vegetation. A path analysis revealed that vapor pressure deficit (VPD) played a greater role than soil moisture or air temperature in constraining GEP under light saturated conditions across most study sites, but to differing degrees from -0.31 to -0.87 μmol CO2 m−2 s-1 hPa-1. Climate projections from 13 general circulation models (CMIP5) under the representative concentration pathway that generates 8.5 W m−2 of radiative forcing suggest that many current tropical rainforest sites on the lower end of the current temperature range are likely to reach a climate space similar to present-day warmer sites by the year 2050, warmer sites will reach a climate not currently experienced, and all forests are likely to experience higher VPD. Results demonstrate the need to quantify if and how mature tropical trees acclimate to heat and water stress, and to further develop flux-partitioning and gap-filling algorithms for defensible estimates of carbon exchange in tropical rainforests. © 2018 Elsevier B.V.
Address Department of Environmental Systems Science, ETH Zurich, Zurich, 8092, Switzerland
Corporate Author Thesis
Publisher Elsevier B.V. Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 01681923 (Issn) ISBN Medium
Area Expedition Conference
Notes Export Date: 12 November 2018; Coden: Afmee; Correspondence Address: Stoy, P.C.; Department of Land Resources and Environmental Sciences, Montana State UniversityUnited States; email: paul.stoy@montana.edu; Funding details: ANR-10-LABX-25-01; Funding details: U.S. Department of Energy, DOE, SC0011097; Funding details: Agence Nationale de la Recherche, ANR; Funding details: 1702029; Funding details: 1552976; Funding details: Graduate School, Ohio State University; Funding details: National Natural Science Foundation of China, NSFC, 31625006; Funding text 1: PCS and JDF acknowledges funding support from the U.S. Department of Energy as part of the GoAmazon project (Grant SC0011097 ). PCS additionally acknowledges the U.S. National Science Foundation grants 1552976 and 1702029 , and The Graduate School at Montana State University . ZF is supported by the China Scholarship Council and National Natural Science Foundation of China ( 31625006 ). This work used eddy covariance data acquired and shared by the FLUXNET community, including the AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, LBA, and TERN- OzFlux networks. The FLUXNET eddy covariance data processing and harmonization was carried out by the ICOS Ecosystem Thematic Center, AmeriFlux Management Project and Fluxdata project of FLUXNET, with the support of CDIAC, and the OzFlux, ChinaFlux and AsiaFlux offices. The Guyaflux program belongs to the SOERE F-ORE-T which is supported annually by Ecofor, Allenvi and the French national research infrastructure ANAEE-F. The Guyaflux program also received support from the “Observatoire du Carbone en Guyane” and an “investissement d'avenir” grant from the Agence Nationale de la Recherche (CEBA, ref ANR-10-LABX-25-01). Funding for the site PA-SPn was provided by the North-South Centre of ETH Zurich. We acknowledge the World Climate Research Programme's Working Group on Coupled Modeling for the CMIP and thank the climate modeling groups for producing and making available their model output. For CMIP, the U.S. Department of Energy's Program for Climate Model Diagnosis and Intercomparison provides coordinating support and led development of software infrastructure in partnership with the Global Organization for Earth System Science Portals. Angela Tang and Taylor Rodenburg provided valuable comments to earlier drafts of this manuscript. We thank Dr. Tim Hill and two anonymous reviewers for their constructive comments on the manuscript.; References: Acevedo, O.C., Moraes, O.L.L., Degrazia, G.A., Fitzjarrald, D.R., Manzi, A.O., Campos, J.G., Is friction velocity the most appropriate scale for correcting nocturnal carbon dioxide fluxes? (2009) Agric. For. Meteorol., 149, pp. 1-10; Aguilos, M., Hérault, B., Burban, B., Wagner, F., Bonal, D., What drives long-term variations in carbon flux and balance in a tropical rainforest in French Guiana? Agric (2018) For. Meteorol., 253-254, pp. 114-123; Ahlström, A., Raupach, M.R., Schurgers, G., Smith, B., Arneth, A., Jung, M., Reichstein, M., Jain, A.K., The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink (2015) Science, 348 (80), pp. 895-899; Aiba, S.I., Kitayama, K., Structure, composition and species diversity in an altitude-substrate matrix of rain forest tree communities on Mount Kinabalu (1999) Borneo. Plant Ecol., 140, pp. 139-157; Andreae, M.O., Artaxo, P., Brandão, C., Carswell, F.E., Ciccioli, P., da Costa, A.L., Culf, A.D., Waterloo, M.J., Biogeochemical cycling of carbon, water, energy, trace gases, and aerosols in Amazonia: the LBA-EUSTACH experiments (2002) J. Geophys. Res., 107, p. 8066; Andreae, M.O., Acevedo, O.C., Araùjo, A., Artaxo, P., Barbosa, C.G.G., Barbosa, H.M.J., Brito, J., Yáñez-Serrano, A.M., The Amazon Tall Tower Observatory (ATTO): overview of pilot measurements on ecosystem ecology, meteorology, trace gases, and aerosols (2015) Atmos. Chem. Phys., 15, pp. 10723-10776; Araújo, A.C., Nobre, A.D., Kruijt, B., Elbers, J.A., Dallarosa, R., Stefani, P., Von Randow, C., Kabat, P., Comparative measurements of carbon dioxide fluxes from two nearby towers in a central Amazonian rainforest: The Manaus LBA site (2002) J. Geophys. Res., 107, p. 8090; Asner, G.P., Anderson, C.B., Martin, R.E., Tupayachi, R., Knapp, D.E., Sinca, F., Landscape biogeochemistry reflected in shifting distributions of chemical traits in the Amazon forest canopy (2015) Nat. Geosci., 8, pp. 567-573; Asner, G.P., Martin, R.E., Knapp, D.E., Tupayachi, R., Anderson, C.B., Sinca, F., Vaughn, N.R., Llactayo, W., Airborne laser-guided imaging spectroscopy to map forest trait diversity and guide conservation (2017) Science, 355 (80), pp. 385-389; Avissar, R., Werth, D., Global hydroclimatological teleconnections resulting from tropical deforestation (2005) J. Hydrometeorol., 6, pp. 134-145; Baccini, A., Walker, W., Carvalho, L., Farina, M., Sulla-Menashe, D., Houghton, R.A., Tropical forests are a net carbon source based on aboveground measurements of gain and loss (2017) Science, 358 (80), pp. 230-234; Belelli Marchesini, L., Bombelli, A., Chiti, T., Consalvo, C., Forgione, A., Grieco, E., Mazzenga, F., Valentini, R., Ankasa flux tower: a new research facility for the study of the carbon cycle in a primary tropical forest in Africa (2008) Proceedings of the Open Science Conference on Africa and Carbon Cycle: The CarboAfrica Project; Beringer, J., Hutley, L.B., McHugh, I., Arndt, S.K., Campbell, D., Cleugh, H.A., Cleverly, J., Wardlaw, T., An introduction to the Australian and New Zealand flux tower network – OzFlux (2016) Biogeosciences, 13, pp. 5895-5916; Bonal, D., Bosc, A., Ponton, S., Goret, J.-Y.J.Y., Burban, B.T., Gross, P., Bonnefond, J.M.J.-M., Granier, A., Impact of severe dry season on net ecosystem exchange in the Neotropical rainforest of French Guiana (2008) Glob. Chang. Biol., 14, pp. 1917-1933; Borma, L.S., da Rocha, H.R., Cabral, O.M., von Randow, C., Collicchio, E., Kurzatkowski, D., Brugger, P.J., Artaxo, P., Atmosphere and hydrological controls of the evapotranspiration over a floodplain forest in the Bananal Island region, Amazonia (2009) J. Geophys. Res. Biogeosci., 114; Bradford, M.G., Metcalfe, D.J., Ford, A., Liddell, M.J., McKeown, A., Floristics, stand structure and aboveground biomass of a 25-ha rainforest plot in the Wet Tropics of Australia (2014) J. Trop. For. Sci., pp. 543-553; Braga, N., da, S., Vitória, A.P., Souza, G.M., Barros, C.F., Freitas, L., Weak relationships between leaf phenology and isohydric and anisohydric behavior in lowland wet tropical forest trees (2016) Biotropica, 48, pp. 453-464; Carswell, F.E., Costa, A.L., Palheta, M., Malhi, Y., Meir, P., Costa, J.D.P.R., Ruivo, M.D.L., Grace, J., Seasonality in CO2 and H2O flux at an eastern Amazonian rain forest (2002) J. Geophys. Res. D Atmos., p. 107; Chambers, J.Q., Tribuzy, E.S., Toledo, L.C., Crispim, B.F., Higuchi, N., dos Santos, J., Araújo, A.C., Trumbore, S.E., Respiration from a tropical forest ecosystem: partitioning of sources and low carbon use efficiency (2004) Ecol. Appl., 14, pp. 72-88; Chambers, J., Davies, S., Koven, C., Kueppers, L., Leung, R., McDowell, N., Norby, R., Rogers, A., Next Generation Ecosystem Experiment (NGEE) Tropics. US DOE NGEE Trop. white paper. (2014); Chiti, T., Certini, G., Grieco, E., Valentini, R., The role of soil in storing carbon in tropical rainforests: the case of Ankasa Park, Ghana (2010) Plant Soil, 331, pp. 453-461; Cleveland, C.C., Wieder, W.R., Reed, S.C., Townsend, A.R., Experimental drought in a tropical rain forest increases soil carbon dioxide losses to the atmosphere (2010) Ecology, 91, pp. 2313-2323; Cleveland, C.C., Townsend, A.R., Taylor, P., Alvarez-Clare, S., Bustamante, M.M.C., Chuyong, G., Dobrowski, S.Z., Wieder, W.R., Relationships among net primary productivity, nutrients and climate in tropical rain forest: a pan-tropical analysis (2011) Ecol. Lett.; Cusack, D.F., Chou, W.W., Yang, W.H., Harmon, M.E., Silver, W.L., Controls on long-term root and leaf litter decomposition in neotropical forests (2009) Glob. Chang. Biol., 15, pp. 1339-1355; da Rocha, H.R., Manzi, A.O., Cabral, O.M., Miller, S.D., Goulden, M.L., Saleska, S.R., Coupe, N.R., Maia, J.F., Patterns of water and heat flux across a biome gradient from tropical forest to savanna in Brazil (2009) J. Geophys. Res. Biogeosci., 114. , G00B12; Dargie, G.C., Lewis, S.L., Lawson, I.T., Mitchard, E.T.A., Page, S.E., Bocko, Y.E., Ifo, S.A., Age, extent and carbon storage of the central Congo Basin peatland complex (2017) Nature, 542, pp. 86-89; de Araújo, A.C., Dolman, A.J., Waterloo, M.J., Gash, J.H.C., Kruijt, B., Zanchi, F.B., de Lange, J.M.E., Backer, J., The spatial variability of CO2 storage and the interpretation of eddy covariance fluxes in central Amazonia (2010) Agric. For. Meteorol., 150, pp. 226-237; Dixon, R.K., Solomon, A.M., Brown, S., Houghton, R.A., Trexier, M.C., Wisniewski, J., Carbon pools and flux of global forest ecosystems (1994) Science, 263 (80), pp. 185-190; Fisher, R.A., Williams, M., Do Vale, R.L., Da Costa, A.L., Meir, P., Evidence from Amazonian forests is consistent with isohydric control of leaf water potential (2006) Plant Cell Environ., 29, pp. 151-165; Foley, J.A., DeFries, R., Asner, G.P., Barford, C., Bonan, G., Carpenter, S.R., Chapin, F.S., Snyder, P.K., Global consequences of land use (2005) Science, 309, pp. 570-574; Fu, Z., Dong, J., Zhou, Y., Stoy, P.C., Niu, S., Long term trend and interannual variability of land carbon uptake—the attribution and processes (2017) Environ. Res. Lett., 12, p. 14018; Fuentes, J.D., Chamecki, M., dos Santos, R.M.N., Von Randow, C., Stoy, P.C., Katul, G., Fitzjarrald, D., Yañez-Serrano, A.M., Linking meteorology, turbulence, and air chemistry in the amazon rain forest (2016) Bull. Am. Meteorol. Soc., 97, pp. 2329-2342; Gerken, T., Chamecki, M., Fuentes, J.D., Air-parcel residence times within forest canopies (2017) Boundary-Layer Meteorol., 165, pp. 29-54; Giardina, F., Konings, A.G., Kennedy, D., Alemohammad, S.H., Oliveira, R.S., Uriarte, M., Gentine, P., Tall Amazonian forests are less sensitive to precipitation variability (2018) Nat. Geosci., 11, pp. 405-409; Gibson, L., Lee, T.M., Koh, L.P., Brook, B.W., Gardner, T.A., Barlow, J., Peres, C.A., Sodhi, N.S., Primary forests are irreplaceable for sustaining tropical biodiversity (2011) Nature, 478, pp. 378-381; Goulden, M.L., Miller, S.D., Da Rocha, H.R., Nocturnal cold air drainage and pooling in a tropical forest (2006) J. Geophys. Res. Atmos., p. 111; Grace, J., Lloyd, J., Mcintyre, J., Miranda, A., Meir, P., Miranda, H., Moncrieff, J., Gash, J., Fluxes of carbon dioxide and water vapour over an undisturbed tropical forest in south-west Amazonia (1995) Glob. Chang. Biol., 1, pp. 1-12; Grace, J., Malhi, Y., Lloyd, J., McIntyre, J., Miranda, A.C., Meir, P., Miranda, H.S., The use of eddy covariance to infer the net carbon dioxide uptake of Brazilian rain forest (1996) Glob. Chang. Biol., 2, pp. 209-217; Grace, J., Nagy, L., Forsberg, B.R., Artaxo, P., The Amazon carbon balance: an evaluation of methods and results (2016) Interactions Between Biosphere, Atmosphere and Human Land Use in the Amazon Basin., pp. 79-100. , Springer Berlin Heidelberg; Hall, C.A.S., Tian, H., Qi, Y., Pontius, G., Cornell, J., Modelling spatial and temporal patterns of tropical land use change (1995) J. Biogeogr., 22, pp. 753-757; Hayek, M.N., Wehr, R., Longo, M., Hutyra, L.R., Wiedemann, K., Munger, J.W., Bonal, D., Wofsy, S.C., A novel correction for biases in forest eddy covariance carbon balance (2018) Agric. For. Meteorol., 250-251, pp. 90-101; Hirano, T., Segah, H., Harada, T., Limin, S., June, T., Hirata, R., Osaki, M., Carbon dioxide balance of a tropical peat swamp forest in Kalimantan, Indonesia (2007) Glob. Chang. Biol., 13, pp. 412-425; Hirano, T., Jauhiainen, J., Inoue, T., Takahashi, H., Controls on the carbon balance of tropical peatlands (2008) Ecosystems, 12, pp. 873-887; Hirano, T., Segah, H., Kusin, K., Limin, S., Takahashi, H., Osaki, M., Effects of disturbances on the carbon balance of tropical peat swamp forests (2012) Glob. Change Biol., 18, pp. 3410-3422; Huete, A.R., Didan, K., Shimabukuro, Y.E., Ratana, P., Saleska, S.R., Hutyra, L.R., Yang, W., Myneni, R., Amazon rainforests green‐up with sunlight in dry season (2006) Geophys. Res. Lett., 33. , L06405; Huete, A.R., Restrepo-Coupe, N., Ratana, P., Didan, K., Saleska, S.R., Ichii, K., Panuthai, S., Gamo, M., Multiple site tower flux and remote sensing comparisons of tropical forest dynamics in Monsoon Asia (2008) Agric. For. Meteorol., 148, pp. 748-760; Hutyra, L.R., Munger, J.W., Saleska, S.R., Gottlieb, E., Daube, B.C., Dunn, A.L., Amaral, D.F., Wofsy, S.C., Seasonal controls on the exchange of carbon and water in an Amazonian rain forest (2007) J. Geophys. Res. Biogeosci., 112; Hutyra, L.R., Munger, J.W., Hammond-Pyle, E., Saleska, S.R., Restrepo-Coupe, N., Daube, B.C., de Camargo, P.B., Wofsy, S.C., Resolving systematic errors in estimates of net ecosystem exchange of CO2 and ecosystem respiration in a tropical forest biome (2008) Agric. For. Meteorol., 148, pp. 1266-1279; Inoue, Y., Ichie, T., Kenzo, T., Yoneyama, A., Kumagai, T., Nakashizuka, T., Effects of rainfall exclusion on leaf gas exchange traits and osmotic adjustment in mature canpopy trees of Dryobalanops aromatica (Sipterocarpaceae) in a Malaysian tropical rain forest (2016) J. Trop. Pediatr., pp. 1-11; Jocher, G., Ottosson Löfvenius, M., De Simon, G., Hörnlund, T., Linder, S., Lundmark, T., Marshall, J., Peichl, M., Apparent winter CO2 uptake by a boreal forest due to decoupling (2017) Agric. For. Meteorol., 232, pp. 23-34; Kiew, F., Hirata, R., Hirano, T., Wong, G.X., Aeries, E.B., Musin, K.K., Waili, J.W., Melling, L., CO2 balance of a secondary tropical peat swamp forest in Sarawak, Malaysia (2018) Agric. For. Meteorol., 248, pp. 494-501; Kim, D.-H., Sexton, J.O., Townshend, J.R., Accelerated deforestation in the humid tropics from the 1990s to the 2000s (2015) Geophys. Res. Lett., 42, pp. 3495-3501; Klein, T., The variability of stomatal sensitivity to leaf water potential across tree species indicates a continuum between isohydric and anisohydric behaviours (2014) Funct. Ecol., 28, pp. 1313-1320; Konings, A.G., Gentine, P., Global variations in ecosystem‐scale isohydricity (2016) Glob. Change Biol.; Körner, C., Leaf diffusive conductances in the major vegetation types of the globe (1995) Ecophysiology of Photosynthesis, pp. 463-490. , Springer; Kosugi, Y., Takanashi, S., Ohkubo, S., Matsuo, N., Tani, M., Mitani, T., Tsutsumi, D., Nik, A.R., CO2 exchange of a tropical rainforest at Pasoh in Peninsular Malaysia (2008) Agric. For. Meteorol., 148, pp. 439-452; Kosugi, Y., Takanashi, S., Tani, M., Ohkubo, S., Matsuo, N., Itoh, M., Noguchi, S., Nik, A.R., Effect of inter-annual climate variability on evapotranspiration and canopy CO2 exchange of a tropical rainforest in Peninsular Malaysia (2012) J. For. Res., 17, pp. 227-240; Kruijt, B., Elbers, J.A., Von Randow, C., Araujo, A.C., Oliveira, P.J., Culf, A., Manzi, A.O., Moors, E.J., The robustness of eddy correlation fluxes for Amazon rain forest conditions (2004) Ecol. Appl., 14, pp. 101-113; Kumagai, T., Porporato, A., Strategies of a Bornean tropical rainforest water use as a function of rainfall regime: isohydric or anisohydric? (2012) Plant Cell Environ., 35, pp. 61-71; Kutsch, W.L., Herbst, M., Vanselow, R., Hummelshøj, P., Jensen, N.O., Kappen, L., Stomatal acclimation influences water and carbon fluxes of a beech canopy in northern Germany (2001) Basic Appl. Ecol., 2, pp. 265-281; Lasslop, G., Reichstein, M., Papale, D., Richardson, A.D., Arneth, A., Barr, A.G., Stoy, P.C., Wohlfahrt, G., Separation of net ecosystem exchange into assimilation and respiration using a light response curve approach: critical issues and global evaluation (2010) Glob. Chang. Biol., 16, pp. 187-208; Levine, N.M., Zhang, K., Longo, M., Baccini, A., Phillips, O.L., Lewis, S.L., Alvarez-Dávila, E., Moorcroft, P.R., Ecosystem heterogeneity determines the ecological resilience of the Amazon to climate change (2016) Proc. Natl. Acad. Sci., 113, pp. 793-797; Lewis, S.L., Brando, P.M., Phillips, O.L., van der Heijden, G.M.F., Nepstad, D., The 2010 amazon drought (2011) Science, 331 (80), p. 554; Loescher, H.W., Oberbauer, S.F., Gholz, H.L., Clark, D.B., Environmental controls on net ecosystem-level carbon exchange and productivity in a Central American tropical wet forest (2003) Glob. Chang. Biol., 9, p. 396; Lopes, A.P., Nelson, B.W., Wu, J., Graça, P.M.L., de, A., Tavares, J.V., Prohaska, N., Saleska, S.R., Leaf flush drives dry season green-up of the Central Amazon (2016) Remote Sens. Environ., 182, pp. 90-98; Malhi, Y., Nobre, A.D., Grace, J., Kruijt, B., Pereira, M.G.P., Culf, A., Scott, S., Carbon dioxide transfer over a Central Amazonian rain forest (1998) J. Geophys. Res., 103, pp. 31593-31612; Marchin, R.M., Broadhead, A.A., Bostic, L.E., Dunn, R.R., Hoffmann, W.A., Stomatal acclimation to vapour pressure deficit doubles transpiration of small tree seedlings with warming (2016) Plant Cell Environ., 39, pp. 2221-2234; Martens, C.S., Shay, T.J., Mendlovitz, H.P., Matross, D.M., Saleska, S.R., Wofsy, S.C., Stephen Woodward, W., Crill, P.M., Radon fluxes in tropical forest ecosystems of Brazilian Amazonia: night‐time CO2 net ecosystem exchange derived from radon and eddy covariance methods (2004) Glob. Chang. Biol., 10, pp. 618-629; Martinez-Vilalta, J., Poyatos, R., Aguade, D., Retana, J., Mencuccini, M., A new look at water transport regulation in plants (2014) New Phytol., 204, pp. 105-115; Matheny, A.M., Mirfenderesgi, G., Bohrer, G., Trait-based representation of hydrological functional properties of plants in weather and ecosystem models (2017) Plant Divers., 39, pp. 1-12; Meir, P., Grace, J., Miranda, A.C., Leaf respiration in two tropical rainforests: constraints on physiology by phosphorus, nitrogen and temperature (2001) Funct. Ecol., 15, pp. 378-387; Miller, S.D., Goulden, M.L., Menton, M.C., da Rocha, H.R., de Freitas, H.C., Silva, E., Figueira, A.M., de Sousa, C.A.D., Biometric and micrometeorological measurements of tropical forest carbon balance (2004) Ecol. Appl., 14, pp. 114-126; Mitchard, E.T.A., The tropical forest carbon cycle and climate change (2018) Nature, 559, pp. 527-534; Navarro, M.N.V., Jourdan, C., Sileye, T., Braconnier, S., Mialet-Serra, I., Saint-Andre, L., Dauzat, J., Roupsard, O., Fruit development, not GPP, drives seasonal variation in NPP in a tropical palm plantation (2008) Tree Physiol., 28, pp. 1661-1674; Nepstad, D.C., Moutinho, P., Dias‐Filho, M.B., Davidson, E., Cardinot, G., Markewitz, D., Figueiredo, R., Schwalbe, K., The effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest (2002) J. Geophys. Res., 107. , 8085; Norby, R.J., De Kauwe, M.G., Domingues, T.F., Duursma, R.A., Ellsworth, D.S., Goll, D.S., Lapola, D.M., Zaehle, S., Model – data synthesis for the next generation of forest free-air CO2 enrichment (FACE) experiments (2015) New Phytol., pp. 17-28; Novick, K., Oren, R., Stoy, P.C., Juang, J.Y., Siqueira, M., Katul, G., The relationship between reference canopy conductance and simplified hydraulic architecture (2009) Adv. Water Resour., 32, pp. 809-819; Novick, K.A., Ficklin, D.L., Stoy, P.C., Williams, C.A., Bohrer, G., Oishi, A.C., Papuga, S.A., Phillips, R.P., The increasing importance of atmospheric demand for ecosystem water and carbon fluxes (2016) Nat. Clim. Change, 6, pp. 1023-1027; Oberbauer, S.F., Loescher, H.W., Clark, D.B., Effects of climate factors on daytime carbon exchange from an old growth forest in Costa rica (2000) Selbyana, pp. 66-73; Oren, R., Sperry, J.S., Katul, G.G., Pataki, D.E., Ewers, B.E., Phillips, N., Schäfer, K.V.R., Survey and synthesis of intra- and interspecific variation in stomatal sensitivity to vapour pressure deficit (1999) Plant Cell Environ., 22, pp. 1515-1526; Pan, Y., Birdsey, R.A., Fang, J., Houghton, R., Kauppi, P.E., Kurz, W.A., Phillips, O.L., Hayes, D., A large and persistent carbon sink in the world's forests (2011) Science, 333 (80). , 988 LP-993; Paoli, G.D., Curran, L.M., Slik, J.W.F., Soil nutrients affect spatial patterns of aboveground biomass and emergent tree density in southwestern Borneo (2008) Oecologia, 155, pp. 287-299; Papale, D., Reichstein, M., Aubinet, M., Canfora, E., Bernhofer, C., Kutsch, W., Longdoz, B., Yakir, D., Towards a standardized processing of Net Ecosystem Exchange measured with eddy covariance technique: algorithms and uncertainty estimation (2006) Biogeosciences, 3, pp. 571-583; Pau, S., Detto, M., Kim, Y., Still, C.J., Tropical forest temperature thresholds for gross primary productivity (2018) Ecosphere, 9; Pavlick, R., Drewry, D.T., Bohn, K., Reu, B., Kleidon, A., The Jena Diversity-Dynamic Global Vegetation Model (JeDi-DGVM): a diverse approach to representing terrestrial biogeography and biogeochemistry based on plant functional trade-offs (2013) Biogeosciences, 10, pp. 4137-4177; Phillips, O.L., Malhi, Y., Higuchi, N., Laurance, W.F., Núñez, P.V., Vásquez, R.M., Laurance, S.G., Grace, J., Changes in the carbon balance of tropical forests: Evidence from long-term plots (1998) Science, 282 (80). , 439 LP-442; Phillips, O.L., Aragão, L.E.O.C., Lewis, S.L., Fisher, J.B., Lloyd, J., López-González, G., Malhi, Y., Torres-Lezama, A., Drought sensitivity of the Amazon Rainforest (2009) Science, 323 (80), pp. 1344-1347; Powell, T.L., Wheeler, J.K., de Oliveira, A.A.R., da Costa, A.C.L., Saleska, S.R., Meir, P., Moorcroft, P.R., Differences in xylem and leaf hydraulic traits explain differences in drought tolerance among mature Amazon rainforest trees (2017) Glob. Change Biol.; Raich, J.W., Russell, A.E., Vitousek, P.M., Primary productivity and ecosystem development along an elevational gradient on Mauna Loa, Hawai'i (1997) Ecology, 78, pp. 707-721; Reichstein, M., Falge, E., Baldocchi, D., Papale, D., Aubinet, M., Berbigier, P., Bernhofer, C., Valentini, R., On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm (2005) Glob. Change Biol., 11, pp. 1424-1439; Restrepo-Coupe, N., da Rocha, H.R., Hutyra, L.R., da Araujo, A.C., Borma, L.S., Christoffersen, B., Cabral, O.M.R., Saleska, S.R., What drives the seasonality of photosynthesis across the Amazon basin? A cross-site analysis of eddy flux tower measurements from the Brasil flux network (2013) Agric. For. Meteorol.; Rice, W.R., Analyzing tables of statistical tests (1989) Evolution (N. Y.), 43, pp. 223-225; Richardson, A.D., Braswell, B.H., Hollinger, D.Y., Jenkins, J.P., Ollinger, S.V., Near-surface remote sensing of spatial and temporal variation in canopy phenology (2009) Ecol. Appl., 19, pp. 1417-1428; Roderick, M.L., Farquhar, G.D., The cause of decreased Pan evaporation over the past 50 years (2002) Science, 298 (80), pp. 1410-1411; Roupsard, O., Bonnefond, J.-M., Irvine, M., Berbigier, P., Nouvellon, Y., Dauzat, J., Taga, S., Bouillet, J.-P., Partitioning energy and evapo-transpiration above and below a tropical palm canopy (2006) Agric. For. Meteorol., 139, pp. 252-268; Saleska, S.R., Miller, S.D., Matross, D.M., Goulden, M., Wofsy, S., da Rocha, H.R., de Camargo, P.B., Silva, H., Carbon in Amazon forests: unexpected seasonal fluxes and disturbance-induced losses (2003) Science, 302 (80), pp. 1554-1557; Saleska, S.R., Didan, K., Huete, A.R., Da Rocha, H.R., Amazon forests green-up during 2005 drought (2007) Science, 318 (80), p. 612; Saleska, S., Da Rocha, H., Kruijt, B., Nobre, A., Ecosystem carbon fluxes and Amazonian forest metabolism (2009) Amazonia Glob. Change, pp. 389-407; Saleska, S.R., Wu, J., Guan, K., Araujo, A.C., Huete, A., Nobre, A.D., Restrepo-Coupe, N., Dry-season greening of Amazon forests (2016) Nature, 531, pp. E4-E5; Salinas, N., Malhi, Y., Meir, P., Silman, M., Roman Cuesta, R., Huaman, J., Salinas, D., Farfan, F., The sensitivity of tropical leaf litter decomposition to temperature: results from a large-scale leaf translocation experiment along an elevation gradient in Peruvian forests (2011) New Phytol., 189, pp. 967-977; Santana, R.A., Dias-Júnior, C.Q., da Silva, J.T., Fuentes, J.D., do Vale, R.S., Alves, E.G., dos Santos, R.M.N., Manzi, A.O., Air turbulence characteristics at multiple sites in and above the Amazon rainforest canopy (2018) Agric. For. Meteorol., 260-261, pp. 41-54; Santos, D.M., Acevedo, O.C., Chamecki, M., Fuentes, J.D., Gerken, T., Stoy, P.C., Temporal scales of the nocturnal flow within and above a forest canopy in Amazonia (2016) Boundary-Layer Meteorol., pp. 1-26; Siddiq, Z., Chen, Y.-J., Zhang, Y.-J., Zhang, J.-L., Cao, K.-F., More sensitive response of crown conductance to VPD and larger water consumption in tropical evergreen than in deciduous broadleaf timber trees (2017) Agric. For. Meteorol., 247, pp. 399-407; Sulman, B.N., Roman, D.T., Yi, K., Wang, L., Phillips, R.P., Novick, K.A., High atmospheric demand for water can limit forest carbon uptake and transpiration as severely as dry soil (2016) Geophys. Res. Lett., 43, pp. 9686-9695; Swann, A.L.S., Hoffman, F.M., Koven, C.D., Randerson, J.T., Plant responses to increasing CO2 reduce estimates of climate impacts on drought severity (2016) Proc. Natl. Acad. Sci. U. S. A., 113, pp. 10019-10024; Taylor, K.E., Stouffer, R.J., Meehl, G.A., An overview of CMIP5 and the experiment design (2012) Bull. Am. Meteorol. Soc.; Taylor, P.G., Cleveland, C.C., Wieder, W.R., Sullivan, B.W., Doughty, C.E., Dobrowski, S.Z., Townsend, A.R., Temperature and rainfall interact to control carbon cycling in tropical forests (2017) Ecol. Lett., 20, pp. 779-788; Thomas, C.K., Martin, J.G., Law, B.E., Davis, K., Toward biologically meaningful net carbon exchange estimates for tall, dense canopies: multi-level eddy covariance observations and canopy coupling regimes in a mature Douglas-fir forest in Oregon (2013) Agric. For. Meteorol., 173, pp. 14-27; Tóta, J., Fitzjarrald, D.R., da Silva Dias, M.A.F., Amazon rainforest exchange of carbon and subcanopy air flow: manaus LBA Site—a complex terrain condition (2012) Transfus. Apher. Sci., , 165067; Tyukavina, A., Baccini, A., Hansen, M.C., Potapov, P.V., Stehman, S.V., Houghton, R.A., Krylov, A.M., Goetz, S.J., Aboveground carbon loss in natural and managed tropical forests from 2000 to 2012 (2015) Environ. Res. Lett., 10, p. 74002; van Marle, M.J.E., Field, R.D., van der Werf, G.R., Estrada de Wagt, I.A., Houghton, R.A., Rizzo, L.V., Artaxo, P., Tsigaridis, K., Fire and deforestation dynamics in Amazonia (1973-2014) (2017) Glob. Biogeochem. Cycles, 31, pp. 24-38; Wieder, W.R., Cleveland, C.C., Townsend, A.R., Controls over leaf litter decomposition in wet tropical forests (2009) Ecology, 90, pp. 3333-3341; Wolf, S., Eugster, W., Majorek, S., Buchmann, N., Afforestation of tropical pasture only marginally affects ecosystem-scale evapotranspiration (2011) Ecosystems, 14, pp. 1264-1275; Wolf, S., Eugster, W., Potvin, C., Buchmann, N., Strong seasonal variations in net ecosystem CO2 exchange of a tropical pasture and afforestation in Panama (2011) Agric. For. Meteorol., 151, pp. 1139-1151; Wolf, S., Eugster, W., Potvin, C., Turner, B.L., Buchmann, N., Carbon sequestration potential of tropical pasture compared with afforestation in Panama (2011) Glob. Change Biol., 17, pp. 2763-2780; Wood, A.W., Leung, L.R., Sridhar, V., Lettenmaier, D.P., Hydrologic implications of dynamical and statistical approaches to downscaling climate model outputs (2004) Clim. Change, 62, pp. 189-216; Wu, J., Guan, K., Hayek, M., Restrepo-Coupe, N., Wiedemann, K.T., Xu, X., Wehr, R., Saleska, S.R., Partitioning controls on Amazon forest photosynthesis between environmental and biotic factors at hourly to interannual timescales (2017) Glob. Change Biol., 23, pp. 1240-1257; Xiao, J., Liu, S., Stoy, P.C., Preface: impacts of extreme climate events and disturbances on carbon dynamics (2016) Biogeosciences, 13, pp. 3665-3675 Approved no
Call Number EcoFoG @ webmaster @ Serial 831
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Author Fortunel, C.; Garnier, E.; Joffre, R.; Kazakou, E.; Quested, H.; Grigulis, K.; Lavorel, S.; Ansquer, P.; Castro, H.; Cruz, P.; Dolezal, J.; Eriksson, O.; Freitas, H.; Golodets, C.; Jouany, C.; Kigel, J.; Kleyer, M.; Lehsten, V.; Leps, J.; Meier, T.; Pakeman, R.; Papadimitriou, M.; Papanastasis, V.P.; Quetier, F.; Robson, M.; Sternberg, M.; Theau, J.P.; Thebault, A.; Zarovali, M.
Title Leaf traits capture the effects of land use changes and climate on litter decomposability of grasslands across Europe Type Journal Article
Year 2009 Publication Ecology Abbreviated Journal Ecology
Volume 90 Issue 3 Pages 598-611
Keywords (up) climate; community functional parameters; disturbance; leaf traits; litter decomposability; litter quality
Abstract Land use and climate changes induce shifts in plant functional diversity and community structure, thereby modifying ecosystem processes. This is particularly true for litter decomposition, an essential process in the biogeochemical cycles of carbon and nutrients. In this study, we asked whether changes in functional traits of living leaves in response to changes in land use and climate were related to rates of litter potential decomposition, hereafter denoted litter decomposability, across a range of 10 contrasting sites. To disentangle the different control factors on litter decomposition, we conducted a microcosm experiment to determine the decomposability under standard conditions of litters collected in herbaceous communities from Europe and Israel. We tested how environmental factors ( disturbance and climate) affected functional traits of living leaves and how these traits then modified litter quality and subsequent litter decomposability. Litter decomposability appeared proximately linked to initial litter quality, with particularly clear negative correlations with lignin-dependent indices ( litter lignin concentration, lignin : nitrogen ratio, and fiber component). Litter quality was directly related to community-weighted mean traits. Lignin-dependent indices of litter quality were positively correlated with community-weighted mean leaf dry matter content (LDMC), and negatively correlated with community-weighted mean leaf nitrogen concentration (LNC). Consequently, litter decomposability was correlated negatively with community-weighted mean LDMC, and positively with community-weighted mean LNC. Environmental factors ( disturbance and climate) influenced community-weighted mean traits. Plant communities experiencing less frequent or less intense disturbance exhibited higher community-weighted mean LDMC, and therefore higher litter lignin content and slower litter decomposability. LDMC therefore appears as a powerful marker of both changes in land use and of the pace of nutrient cycling across 10 contrasting sites.
Address [Fortunel, Claire; Garnier, Eric; Joffre, Richard; Kazakou, Elena] CNRS, UMR 5175, Ctr Ecol Fonct & Evolut, F-34293 Montpellier 5, France, Email: claire.fortunel@ecofog.gf
Corporate Author Thesis
Publisher ECOLOGICAL SOC AMER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0012-9658 ISBN Medium
Area Expedition Conference
Notes ISI:000263776800003 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 121
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Author Herault, B.; Thoen, D.
Title How habitat area, local and regional factors shape plant assemblages in isolated closed depressions Type Journal Article
Year 2009 Publication Acta Oecologica-International Journal of Ecology Abbreviated Journal Acta Oecol.-Int. J. Ecol.
Volume 35 Issue 3 Pages 385-392
Keywords (up) Closed depressions; Colonization; Connectivity; Fragmented habitats; Emergent Groups; Open and forested landscape; Life-history traits
Abstract Classifying species by shared life-history traits is important if common ecological response groups are to be identified among different species. We investigated how habitat area, local and regional factors shape plant communities in small isolated closed depressions, and how the species richness is related to the interplay between environmental factors and specific life-history trait combinations. In Central-Western Europe, 169 closed depressions were completely Surveyed for plant presence in two highly contrasted landscapes (forested and open landscapes). All species were clustered into 9 Emergent Groups based oil 10 life-history traits related to plant dispersal, establishment and persistence. Habitat areas were related to species presence using logistic regressions. Most Emergent Groups were more area-dependent in open than in forested landscapes, owing to heterogeneous light levels in forest weakening the species-area relationship. In open landscapes, Floating Hydrophytes were severely underrepresented in very small depressions, owing to the absence of waterfowl poulation. Local environmental and regional factors were related to species richness using Generalized Linear Models. In open landscapes, local environmental factors such as water conductivity or soil productivity are respectively the main predictors. In forested landscapes, the abundance of most Emergent Groups Was better predicted by regional factors, i.e., habitat connectivity and distance to the forest edge. Forested landscapes strongly impeded the closed depressions' colonization by the less mobile Emergent Groups Such as Large-seeded Perennials. (C) 2009 Elsevier Masson SAS. All rights reserved.
Address [Herault, Bruno] Univ Antilles Guyane, UMR EcoFoG, F-97387 Kourou, France, Email: bruno.herault@ecofog.gf
Corporate Author Thesis
Publisher GAUTHIER-VILLARS/EDITIONS ELSEVIER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1146-609X ISBN Medium
Area Expedition Conference
Notes ISI:000266174400006 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 112
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Author Herault, B.; Thoen, D.
Title Diversity of plant assemblages in isolated depressional wetlands from Central-Western Europe Type Journal Article
Year 2008 Publication Biodiversity and Conservation Abbreviated Journal Biodivers. Conserv.
Volume 17 Issue 9 Pages 2169-2183
Keywords (up) closed depressions; connectivity; fens; forest; grassland; habitat area; landscape matrix
Abstract A closed depression is defined as a geomorphologic element where a sediment depository is encircled by hillslopes. Despite the fact that closed depressions are often the only stagnant water points in many European landscapes, few ecological researches on their plant assemblages have been done. The main goal of this study was to give first results of the environmental factors responsible for the vegetation composition, richness and rarity in the closed depressions of the Lorraine biogeographical district (Belgium, France and grand-duche de Luxembourg). We surveyed for plant presence 85 forest and 77 grassland closed depressions. For each site, wetland area, local environmental factors and regional connectivities registered. For each species, the Ellenberg values were compiled. To investigate the main source of variation in species composition and in species richness (including richness in rare species), Non-metric Multidimensional Scaling analyses and Generalized Linear Models were respectively used. Species pools in forest (forest and preforest species) and in grassland (bog plants, pioneers, helophytes) were quite different. In both landscapes, a gradient from plants typical of basic high-productive soils to plants typical of acid low-productive soils reflects a shared successional gradient. The accumulation of organic matter allowed the establishment of Sphagnum spp., which slowly acidified the soil and thus acted as ecosystem engineers for the arrival of bog plants. Moreover, the species composition was additionally driven by the plant light tolerance in forests and by the plant water requirements in grasslands. Mechanisms of species accumulation (increase in species richness) were different in forests and in grasslands: respectively related to the plant light tolerance and to the wetland area. At the regional level, the averaged soil productivity was negatively related to the richness in rare species. Indeed, perennial highly-competitive plants such as Glyceria spp., Iris pseudacorus or Urtica dioica impeded the establishment of smaller and rarer species. At the habitat level, isolated closed depressions (due to either low connectivity or low grazing pressure) have more habitat rare species, giving evidences of dispersal limitation in plant assemblages of closed depressions.
Address [Herault, Bruno] Inst Bot, Ctr Ecol Vegetale & Hydrol, F-67083 Strasbourg, France, Email: bruno.herault@cirad.fr
Corporate Author Thesis
Publisher SPRINGER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0960-3115 ISBN Medium
Area Expedition Conference
Notes ISI:000257486400008 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 135
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Author Solander, K.C.; Newman, B.D.; Carioca De Araujo, A.; Barnard, H.R.; Berry, Z.C.; Bonal, D.; Bretfeld, M.; Burban, B.; Candido, L.A.; Célleri, R.; Chambers, J.Q.; Christoffersen, B.O.; Detto, M.; Dorigo, W.A.; Ewers, B.E.; Ferreira, S.J.F.; Knohl, A.; Leung, L.R.; McDowell, N.G.; Miller, G.R.; Monteiro, M.T.F.; Moore, G.W.; Negron-Juarez, R.; Saleska, S.R.; Stiegler, C.; Tomasella, J.; Xu, C.
Title The pantropical response of soil moisture to El Niño Type Journal Article
Year 2020 Publication Hydrology and Earth System Sciences Abbreviated Journal Hydrol. Earth Syst. Sci.
Volume 24 Issue 5 Pages 2303-2322
Keywords (up) Cluster analysis; Oceanography; Soil moisture; Surface waters; Tropics; Climate anomalies; Clustered datum; Hydrologic changes; Land data assimilation systems; Sea surface temperature anomalies; Situ soil moistures; Tropical hydrologies; Tropical Pacific ocean; Soil surveys
Abstract The 2015–2016 El Niño event ranks as one of the most severe on record in terms of the magnitude and extent of sea surface temperature (SST) anomalies generated in the tropical Pacific Ocean. Corresponding global impacts on the climate were expected to rival, or even surpass, those of the 1997–1998 severe El Niño event, which had SST anomalies that were similar in size. However, the 2015–2016 event failed to meet expectations for hydrologic change in many areas, including those expected to receive well above normal precipitation. To better understand how climate anomalies during an El Niño event impact soil moisture, we investigate changes in soil moisture in the humid tropics (between ±25∘) during the three most recent super El Niño events of 1982–1983, 1997–1998 and 2015–2016, using data from the Global Land Data Assimilation System (GLDAS). First, we use in situ soil moisture observations obtained from 16 sites across five continents to validate and bias-correct estimates from GLDAS (r2=0.54). Next, we apply a k-means cluster analysis to the soil moisture estimates during the El Niño mature phase, resulting in four groups of clustered data. The strongest and most consistent decreases in soil moisture occur in the Amazon basin and maritime southeastern Asia, while the most consistent increases occur over eastern Africa. In addition, we compare changes in soil moisture to both precipitation and evapotranspiration, which showed a lack of agreement in the direction of change between these variables and soil moisture most prominently in the southern Amazon basin, the Sahel and mainland southeastern Asia. Our results can be used to improve estimates of spatiotemporal differences in El Niño impacts on soil moisture in tropical hydrology and ecosystem models at multiple scales.
Address Coordination of Research and Development, National Centre for Monitoring and Early Warning of Natural Disasters, Cachoeira Paulista, Brazil
Corporate Author Thesis
Publisher Copernicus GmbH Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 10275606 (Issn) ISBN Medium
Area Expedition Conference
Notes Export Date: 29 May 2020; Correspondence Address: Solander, K.C.; Earth and Environmental Sciences, Los Alamos National LaboratoryUnited States; email: ksolander@lanl.gov Approved no
Call Number EcoFoG @ webmaster @ Serial 934
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Author Traissac, S.; Pascal, J.-P.
Title Birth and life of tree aggregates in tropical forest: Hypotheses on population dynamics of an aggregated shade-tolerant species Type Journal Article
Year 2014 Publication Journal of Vegetation Science Abbreviated Journal J. Veg. Sci.
Volume 25 Issue 2 Pages 491-502
Keywords (up) Clusters; Colonization strategy; Janzen-Connell; Spatial analysis; Spatial pattern; Vouacapoua americana
Abstract Questions: Several studies have described aggregated spatial patterns in tropical tree species. This study investigates aggregate dynamics of Vouacapoua americana (Aublet), a climax species whose spatial pattern is not simply related to light and soil conditions or to its short seed dispersal range. Location: Two rain forest sites: Nouragues and Paracou, in the Guiana Shield. Methods: We described the spatial pattern of tree locations and spatial autocorrelation of tree diameters, using statistics derived from Ripley's K. We particularly used methods to define analysis subplots according to local density or local mean diameter. We investigated relationships between spatial distributions of adults and saplings. Results: At both sites, populations of Vouacapoua demonstrated several nested levels of aggregation. Tree diameters were spatially autocorrelated, revealing the existence of clusters with similar diameters. In the largest aggregates, tree diameters declined from the centre to the edge. Regeneration was aggregated and occurred mainly at cluster edges and around rare isolated trees, and sapling densities and basal area of adults were negatively correlated. We show that long-distance dispersal events are rare. Conclusions: Environmental factors and seed dispersal only explain part of the observed spatial patterns. We provide two main hypotheses about Vouacapoua population dynamics. First, the lack of regeneration in aggregate centres results in the ageing of existing aggregates. We suggest that this lack of recruitment close to mature trees is due to a Janzen-Connell effect. However, aggregates can continue to grow along colonization fronts. Second, long-distance dispersal events allow the formation of new clusters and play a crucial role in the colonization process. We investigate aggregate dynamics of Vouacapoua americana (Aublet) whose spatial pattern is not simply related to environmental conditions or to its seed dispersal. Regeneration does not occur in centers of aggregate of adults. We suggest that rare long-distance dispersal events and density-dependence predation of seeds and seedlings play a crucial role in formation of new clusters and structuration of larger aggregates. © 2013 International Association for Vegetation Science.
Address Université Claude Bernard Lyon 1, 43 Boulevard 11 Novembre 1918, Villeurbanne, 69100, France
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 11009233 (Issn) ISBN Medium
Area Expedition Conference
Notes Export Date: 10 March 2014; Source: Scopus; Coden: Jvese; Language of Original Document: English; Correspondence Address: Traissac, S.; AgroParisTech, UMR ECOlogie des Forêts de Guyane, Campus Agronomique, BP 709, Kourou, 97387, France; email: stephane.traissac@ecofog.gf Approved no
Call Number EcoFoG @ webmaster @ Serial 532
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Author Bandou, E.; Lebailly, F.; Muller, F.; Dulormne, M.; Toribio, A.; Chabrol, J.; Courtecuisse, R.; Plenchette, C.; Prin, Y.; Duponnois, R.; Thiao, M.; Sylla, S.; Dreyfus, B.; Ba, A.M.
Title The ectomycorrhizal fungus Scleroderma bermudense alleviates salt stress in seagrape (Coccoloba uvifera L.) seedlings Type Journal Article
Year 2006 Publication Mycorrhiza Abbreviated Journal Mycorrhiza
Volume 16 Issue 8 Pages 559-565
Keywords (up) Coccoloba uvifera; ectomycorrhizal dependency; mineral uptake; salt stress; water status
Abstract The purpose of this study was to test the capacity of the ectomycorrhizal (ECM) fungus, Scleroderma bermudense, to alleviate saline stress in seagrape (Coccoloba uvifera L.) seedlings. Plants were grown over a range (0, 200, 350 and 500 mM) of NaCl levels for 12 weeks, after 4 weeks of non-saline pre-treatment under greenhouse conditions. Growth and mineral nutrition of the seagrape seedlings were stimulated by S. bermudense regardless of salt stress. Although ECM colonization was reduced with increasing NaCl levels, ECM dependency of seagrape seedlings increased. Tissues of ECM plants had significantly increased concentrations of P and K but lower Na and Cl concentrations than those of non-ECM plants. Higher K concentrations in the leaves of ECM plants suggested a higher osmoregulating capacity of these plants. Moreover, the water status of ECM plants was improved despite their higher evaporative leaf surface. The results suggest that the reduction in Na and Cl uptake together with a concomitant increase in P and K absorption and a higher water status in ECM plants may be important salt-alleviating mechanisms for seagrape seedlings growing in saline soils.
Address Univ Antilles Guyane, Fac Sci Exactes & Nat, Lab Biol & Physiol Vegetales, F-97159 Guadeloupe, France, Email: amadou.ba@univ-ag.fr
Corporate Author Thesis
Publisher SPRINGER Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0940-6360 ISBN Medium
Area Expedition Conference
Notes ISI:000241687200006 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 221
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