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Hofman, M.P.; Hayward, M.W.; Heim, M.; Marchand, P.; Rolandsen, C.M.; Mattisson, J.; Urbano, F.; Heurich, M.; Mysterud, A.; Melzheimer, J.; Morellet, N.; Voigt, U.; Allen, B.L.; Gehr, B.; Rouco, C.; Ullmann, W.; Holand, Ø.; Jørgensen, N.H.; Steinheim, G.; Cagnacci, F.; Kroeschel, M.; Kaczensky, P.; Buuveibaatar, B.; Payne, J.C.; Palmegiani, I.; Jerina, K.; Kjellander, P.; Johansson, Ö.; LaPoint, S.; Bayrakcismith, R.; Linnell, J.D.C.; Zaccaroni, M.; Jorge, M.L.S.; Oshima, J.E.F.; Songhurst, A.; Fischer, C.; Mc Bride, R.T., Jr.; Thompson, J.J.; Streif, S.; Sandfort, R.; Bonenfant, C.; Drouilly, M.; Klapproth, M.; Zinner, D.; Yarnell, R.; Stronza, A.; Wilmott, L.; Meisingset, E.; Thaker, M.; Vanak, A.T.; Nicoloso, S.; Graeber, R.; Said, S.; Boudreau, M.R.; Devlin, A.; Hoogesteijn, R.; May-Junior, J.A.; Nifong, J.C.; Odden, J.; Quigley, H.B.; Tortato, F.; Parker, D.M.; Caso, A.; Perrine, J.; Tellaeche, C.; Zieba, F.; Zwijacz-Kozica, T.; Appel, C.L.; Axsom, I.; Bean, W.T.; Cristescu, B.; Périquet, S.; Teichman, K.J.; Karpanty, S.; Licoppe, A.; Menges, V.; Black, K.; Scheppers, T.L.; Schai-Braun, S.C.; Azevedo, F.C.; Lemos, F.G.; Payne, A.; Swanepoel, L.H.; Weckworth, B.V.; Berger, A.; Bertassoni, A.; McCulloch, G.; Sustr, P.; Athreya, V.; Bockmuhl, D.; Casaer, J.; Ekori, A.; Melovski, D.; Richard-Hansen, C.; Van De Vyver, D.; Reyna-Hurtado, R.; Robardet, E.; Selva, N.; Sergiel, A.; Farhadinia, M.S.; Sunde, P.; Portas, R.; Ambarli, H.; Berzins, R.; Kappeler, P.M.; Mann, G.K.; Pyritz, L.; Bissett, C.; Grant, T.; Steinmetz, R.; Swedell, L.; Welch, R.J.; Armenteras, D.; Bidder, O.R.; González, T.M.; Rosenblatt, A.; Kachel, S.; Balkenhol, N. |
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Title |
Right on track? Performance of satellite telemetry in terrestrial wildlife research |
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Journal Article |
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Year |
2019 |
Publication |
PLoS One |
Abbreviated Journal |
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Volume |
14 |
Issue |
5 |
Pages |
e0216223 |
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Keywords |
article; nonhuman; telemetry; terrestrial species; wildlife |
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Satellite telemetry is an increasingly utilized technology in wildlife research, and current devices can track individual animal movements at unprecedented spatial and temporal resolutions. However, as we enter the golden age of satellite telemetry, we need an in-depth understanding of the main technological, species-specific and environmental factors that determine the success and failure of satellite tracking devices across species and habitats. Here, we assess the relative influence of such factors on the ability of satellite telemetry units to provide the expected amount and quality of data by analyzing data from over 3,000 devices deployed on 62 terrestrial species in 167 projects worldwide. We evaluate the success rate in obtaining GPS fixes as well as in transferring these fixes to the user and we evaluate failure rates. Average fix success and data transfer rates were high and were generally better predicted by species and unit characteristics, while environmental characteristics influenced the variability of performance. However, 48% of the unit deployments ended prematurely, half of them due to technical failure. Nonetheless, this study shows that the performance of satellite telemetry applications has shown improvements over time, and based on our findings, we provide further recommendations for both users and manufacturers. |
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South African National Parks, Scientific Services, Kimberley, South Africa |
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Public Library of Science |
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19326203 (Issn) |
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EcoFoG @ webmaster @ |
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874 |
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Zinger, L.; Taberlet, P.; Schimann, H.; Bonin, A.; Boyer, F.; De Barba, M.; Gaucher, P.; Gielly, L.; Giguet-Covex, C.; Iribar, A.; Réjou-Méchain, M.; Rayé, G.; Rioux, D.; Schilling, V.; Tymen, B.; Viers, J.; Zouiten, C.; Thuiller, W.; Coissac, E.; Chave, J. |
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Title |
Body size determines soil community assembly in a tropical forest |
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Journal Article |
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Year |
2019 |
Publication |
Molecular Ecology |
Abbreviated Journal |
Mol Ecol |
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Volume |
28 |
Issue |
3 |
Pages |
528-543 |
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Keywords |
DNA metabarcoding; eDNA; French Guiana; multitaxa; neutral assembly; niche determinism; propagule size; soil diversity |
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Abstract |
Tropical forests shelter an unparalleled biological diversity. The relative influence of environmental selection (i.e., abiotic conditions, biotic interactions) and stochastic?distance-dependent neutral processes (i.e., demography, dispersal) in shaping communities has been extensively studied for various organisms, but has rarely been explored across a large range of body sizes, in particular in soil environments. We built a detailed census of the whole soil biota in a 12-ha tropical forest plot using soil DNA metabarcoding. We show that the distribution of 19 taxonomic groups (ranging from microbes to mesofauna) is primarily stochastic, suggesting that neutral processes are prominent drivers of the assembly of these communities at this scale. We also identify aluminium, topography and plant species identity as weak, yet significant drivers of soil richness and community composition of bacteria, protists and to a lesser extent fungi. Finally, we show that body size, which determines the scale at which an organism perceives its environment, predicted the community assembly across taxonomic groups, with soil mesofauna assemblages being more stochastic than microbial ones. These results suggest that the relative contribution of neutral processes and environmental selection to community assembly directly depends on body size. Body size is hence an important determinant of community assembly rules at the scale of the ecological community in tropical soils and should be accounted for in spatial models of tropical soil food webs. |
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John Wiley & Sons, Ltd (10.1111) |
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0962-1083 |
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EcoFoG @ webmaster @ |
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873 |
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Steidinger, B.S.; Crowther, T.W.; Liang, J.; Van Nuland, M.E.; Werner, G.D.A.; Reich, P.B.; Nabuurs, G.; de-Miguel, S.; Zhou, M.; Picard, N.; Herault, B.; Zhao, X.; Zhang, C.; Routh, D.; Peay, K.G.; Abegg, M.; Adou Yao, C.Y.; Alberti, G.; Almeyda Zambrano, A.; Alvarez-Davila, E.; Alvarez-Loayza, P.; Alves, L.F.; Ammer, C.; Antón-Fernández, C.; Araujo-Murakami, A.; Arroyo, L.; Avitabile, V.; Aymard, G.; Baker, T.; Bałazy, R.; Banki, O.; Barroso, J.; Bastian, M.; Bastin, J.-F.; Birigazzi, L.; Birnbaum, P.; Bitariho, R.; Boeckx, P.; Bongers, F.; Bouriaud, O.; Brancalion, P.H.S.; Brandl, S.; Brearley, F.Q.; Brienen, R.; Broadbent, E.; Bruelheide, H.; Bussotti, F.; Cazzolla Gatti, R.; Cesar, R.; Cesljar, G.; Chazdon, R.; Chen, H.Y.H.; Chisholm, C.; Cienciala, E.; Clark, C.J.; Clark, D.; Colletta, G.; Condit, R.; Coomes, D.; Cornejo Valverde, F.; Corral-Rivas, J.J.; Crim, P.; Cumming, J.; Dayanandan, S.; de Gasper, A.L.; Decuyper, M.; Derroire, G.; DeVries, B.; Djordjevic, I.; Iêda, A.; Dourdain, A.; Obiang, N.L.E.; Enquist, B.; Eyre, T.; Fandohan, A.B.; Fayle, T.M.; Feldpausch, T.R.; Finér, L.; Fischer, M.; Fletcher, C.; Fridman, J.; Frizzera, L.; Gamarra, J.G.P.; Gianelle, D.; Glick, H.B.; Harris, D.; Hector, A.; Hemp, A.; Hengeveld, G.; Herbohn, J.; Herold, M.; Hillers, A.; Honorio Coronado, E.N.; Huber, M.; Hui, C.; Cho, H.; Ibanez, T.; Jung, I.; Imai, N.; Jagodzinski, A.M.; Jaroszewicz, B.; Johannsen, V.; Joly, C.A.; Jucker, T.; Karminov, V.; Kartawinata, K.; Kearsley, E.; Kenfack, D.; Kennard, D.; Kepfer-Rojas, S.; Keppel, G.; Khan, M.L.; Killeen, T.; Kim, H.S.; Kitayama, K.; Köhl, M.; Korjus, H.; Kraxner, F.; Laarmann, D.; Lang, M.; Lewis, S.; Lu, H.; Lukina, N.; Maitner, B.; Malhi, Y.; Marcon, E.; Marimon, B.S.; Marimon-Junior, B.H.; Marshall, A.R.; Martin, E.; Martynenko, O.; Meave, J.A.; Melo-Cruz, O.; Mendoza, C.; Merow, C.; Monteagudo Mendoza, A.; Moreno, V.; Mukul, S.A.; Mundhenk, P.; Nava-Miranda, M.G.; Neill, D.; Neldner, V.; Nevenic, R.; Ngugi, M.; Niklaus, P.; Oleksyn, J.; Ontikov, P.; Ortiz-Malavasi, E.; Pan, Y.; Paquette, A.; Parada-Gutierrez, A.; Parfenova, E.; Park, M.; Parren, M.; Parthasarathy, N.; Peri, P.L.; Pfautsch, S.; Phillips, O.; Piedade, M.T.; Piotto, D.; Pitman, N.C.A.; Polo, I.; Poorter, L.; Poulsen, A.D.; Poulsen, J.R.; Pretzsch, H.; Ramirez Arevalo, F.; Restrepo-Correa, Z.; Rodeghiero, M.; Rolim, S.; Roopsind, A.; Rovero, F.; Rutishauser, E.; Saikia, P.; Saner, P.; Schall, P.; Schelhaas, M.-J.; Schepaschenko, D.; Scherer-Lorenzen, M.; Schmid, B.; Schöngart, J.; Searle, E.; Seben, V.; Serra-Diaz, J.M.; Salas-Eljatib, C.; Sheil, D.; Shvidenko, A.; Silva-Espejo, J.; Silveira, M.; Singh, J.; Sist, P.; Slik, F.; Sonké, B.; Souza, A.F.; Stereńczak, K.; Svenning, J.-C.; Svoboda, M.; Targhetta, N.; Tchebakova, N.; Steege, H.; Thomas, R.; Tikhonova, E.; Umunay, P.; Usoltsev, V.; Valladares, F.; van der Plas, F.; Van Do, T.; Vasquez Martinez, R.; Verbeeck, H.; Viana, H.; Vieira, S.; von Gadow, K.; Wang, H.-F.; Watson, J.; Westerlund, B.; Wiser, S.; Wittmann, F.; Wortel, V.; Zagt, R.; Zawila-Niedzwiecki, T.; Zhu, Z.-X.; Zo-Bi, I.C.; GFBI consortium |
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Title |
Climatic controls of decomposition drive the global biogeography of forest-tree symbioses |
Type |
Journal Article |
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Year |
2019 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
569 |
Issue |
7756 |
Pages |
404-408 |
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Keywords |
Fungi |
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Abstract |
The identity of the dominant root-associated microbial symbionts in a forest determines the ability of trees to access limiting nutrients from atmospheric or soil pools 1,2 , sequester carbon 3,4 and withstand the effects of climate change 5,6 . Characterizing the global distribution of these symbioses and identifying the factors that control this distribution are thus integral to understanding the present and future functioning of forest ecosystems. Here we generate a spatially explicit global map of the symbiotic status of forests, using a database of over 1.1 million forest inventory plots that collectively contain over 28,000 tree species. Our analyses indicate that climate variables—in particular, climatically controlled variation in the rate of decomposition—are the primary drivers of the global distribution of major symbioses. We estimate that ectomycorrhizal trees, which represent only 2% of all plant species 7 , constitute approximately 60% of tree stems on Earth. Ectomycorrhizal symbiosis dominates forests in which seasonally cold and dry climates inhibit decomposition, and is the predominant form of symbiosis at high latitudes and elevation. By contrast, arbuscular mycorrhizal trees dominate in aseasonal, warm tropical forests, and occur with ectomycorrhizal trees in temperate biomes in which seasonally warm-and-wet climates enhance decomposition. Continental transitions between forests dominated by ectomycorrhizal or arbuscular mycorrhizal trees occur relatively abruptly along climate-driven decomposition gradients; these transitions are probably caused by positive feedback effects between plants and microorganisms. Symbiotic nitrogen fixers—which are insensitive to climatic controls on decomposition (compared with mycorrhizal fungi)—are most abundant in arid biomes with alkaline soils and high maximum temperatures. The climatically driven global symbiosis gradient that we document provides a spatially explicit quantitative understanding of microbial symbioses at the global scale, and demonstrates the critical role of microbial mutualisms in shaping the distribution of plant species. © 2019, The Author(s), under exclusive licence to Springer Nature Limited. |
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Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway |
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Nature Publishing Group |
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ISSN |
00280836 (Issn) |
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no |
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EcoFoG @ webmaster @ |
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872 |
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Author |
Leroy, C.; Gril, E.; Si Ouali, L.; Coste, S.; Gérard, B.; Maillard, P.; Mercier, H.; Stahl, C. |
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Title |
Water and nutrient uptake capacity of leaf-absorbing trichomes vs. roots in epiphytic tank bromeliads |
Type |
Journal Article |
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Year |
2019 |
Publication |
Environmental and Experimental Botany |
Abbreviated Journal |
Environ. Exp. Bot. |
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Volume |
163 |
Issue |
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Pages |
112-123 |
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Keywords |
15 N labelling; Carbon metabolism; Nutrient uptake; Plant performance; Tank bromeliad; Water status; Aechmea |
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Abstract |
The water and nutrient uptake mechanisms used by vascular epiphytes have been the subject of a few studies. While leaf absorbing trichomes (LATs) are the main organ involved in resource uptake by bromeliads, little attention has been paid to the absorbing role of epiphytic bromeliad roots. This study investigates the water and nutrient uptake capacity of LATs vs. roots in two epiphytic tank bromeliads Aechmea aquilega and Lutheria splendens. The tank and/or the roots of bromeliads were watered, or not watered at all, in different treatments. We show that LATs and roots have different functions in resource uptake in the two species, which we mainly attributed to dissimilarities in carbon acquisition and growth traits (e.g., photosynthesis, relative growth rate, non-structural carbohydrates, malate), to water relation traits (e.g., water and osmotic potentials, relative water content, hydrenchyma thickness) and nutrient uptake (e.g., 15 N-labelling). While the roots of A. aquilega did contribute to water and nutrient uptake, the roots of L. splendens were less important than the role played by the LATs in resource uptake. We also provide evidenced for a synergistic effect of combined watering of tank and root in the Bromelioideae species. These results call for a more complex interpretation of LATs vs. roots in resource uptake in bromeliads. © 2019 Elsevier B.V. |
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Address |
INRA, UMR EcoFoG, CNRS, CIRAD, AgroParisTech, Université des Antilles, Université de Guyane, Kourou, 97310, France |
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Elsevier B.V. |
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00988472 (Issn) |
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EcoFoG @ webmaster @ |
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871 |
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Caron, H.; Molino, J.-F.; Sabatier, D.; Léger, P.; Chaumeil, P.; Scotti-Saintagne, C.; Frigério, J.-M.; Scotti, I.; Franc, A.; Petit, R.J. |
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Title |
Chloroplast DNA variation in a hyperdiverse tropical tree community |
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Journal Article |
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Year |
2019 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
Ecology and Evolution |
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Volume |
9 |
Issue |
8 |
Pages |
4897-4905 |
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Keywords |
chloroplast DNA; DNA barcoding; genetic diversity; hybridization; incomplete lineage sorting; introgression; species diversity; tropical trees |
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Abstract |
We investigate chloroplast DNA variation in a hyperdiverse community of tropical rainforest trees in French Guiana, focusing on patterns of intraspecific and interspecific variation. We test whether a species genetic diversity is higher when it has congeners in the community with which it can exchange genes and if shared haplotypes are more frequent in genetically diverse species, as expected in the presence of introgression. We sampled a total of 1,681 individual trees from 472 species corresponding to 198 genera and sequenced them at a noncoding chloroplast DNA fragment. Polymorphism was more frequent in species that have congeneric species in the study site than in those without congeners (30% vs. 12%). Moreover, more chloroplast haplotypes were shared with congeners in polymorphic species than in monomorphic ones (44% vs. 28%). Despite large heterogeneities caused by genus-specific behaviors in patterns of hybridization, these results suggest that the higher polymorphism in the presence of congeners is caused by local introgression rather than by incomplete lineage sorting. Our findings suggest that introgression has the potential to drive intraspecific genetic diversity in species-rich tropical forests. |
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INRA, UR629 Ecologie des Forêts Méditerranéennes, URFM, Avignon, France |
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John Wiley and Sons Ltd |
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20457758 (Issn) |
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EcoFoG @ webmaster @ |
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870 |
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Devault, D.A.; Beilvert, B.; Winterton, P. |
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Title |
Ship breaking or scuttling? A review of environmental, economic and forensic issues for decision support |
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Journal Article |
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Year |
2017 |
Publication |
Environmental Science and Pollution Research |
Abbreviated Journal |
Environ. Sci. Pollut. Res. |
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Volume |
24 |
Issue |
33 |
Pages |
25741-25774 |
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Keywords |
Artificial reef; Diving; Ship recycling; Ship Recycling Facilities; Shipbreaking; Tourism; Working conditions; Wrecks; artificial reef; coastal erosion; coastal zone management; cost-benefit analysis; decision support system; developing world; economic impact; environmental economics; environmental impact assessment; environmental issue; facility location; health and safety; invasive species; profitability; recycling; shipping; tourism; working conditions; wreck; analysis; decision support system; economics; international cooperation; pollution; prevention and control; procedures; recycling; ship; statistics and numerical data; Decision Support Techniques; Environmental Pollution; Internationality; Recycling; Ships |
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Abstract |
In a globalized world, the world trade fleet plays a pivotal role in limiting transport costs. But, the management of obsolete ships is an acute problem, with most Ship Recycling Facilities (SRF) situated in developing countries. They are renowned for their controversial work and safety conditions and their environmental impact. Paradoxically, dismantlement is paid for by the shipowners in accordance with international conventions therefore it is more profitable for them to sell off ships destined for scrapping. Scuttling, the alternative to scrapping, is assessed in the present review to compare the cost/benefit ratios of the two approaches. Although scrapping provides employment and raw materials – but with environmental, health and safety costs – scuttling provides fisheries and diving tourism opportunities but needs appropriate management to avoid organic and metal pollution, introduction of invasive species and exacerbation of coastal erosion. It is also limited by appropriate bottom depth, ship type and number. The present review inventories the environmental, health, safety, economic, and forensic aspects of each alternative. © 2016, Springer-Verlag Berlin Heidelberg. |
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Département Langues et Gestion, Université Toulouse III – Paul Sabatier, 118 route de Narbonne, Toulouse cedex 09, 31062, France |
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Springer Verlag |
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09441344 (Issn) |
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EcoFoG @ webmaster @ |
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869 |
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Van Langenhove, L.; Depaepe, T.; Vicca, S.; van den Berge, J.; Stahl, C.; Courtois, E.; Weedon, J.; Urbina, I.; Grau, O.; Asensio, D.; Peñuelas, J.; Boeckx, P.; Richter, A.; Van Der Straeten, D.; Janssens, I.A. |
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Title |
Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield |
Type |
Journal Article |
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Year |
2019 |
Publication |
Plant and Soil |
Abbreviated Journal |
Plant Soil |
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Free-living nitrogen fixation; French Guiana; Molybdenum; Nutrients; Phosphorus; Tropical forest |
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Abstract |
Background and aims: Biological fixation of atmospheric nitrogen (N 2 ) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. Methods: We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water and available N and P, explained most of the variation in FLNF rates. Results: Overall, FLNF rates were lower than measured in tropical systems elsewhere. In soils seasonal variability was small and FLNF rates differed among topographies at only one site. Water, P and pH explained 24% of the variation. In leaf litter, FLNF rates differed seasonally, without site or topographical differences. Water, C, N and P explained 46% of the observed variation. We found no regulatory role of Mo at our sites. Conclusions: Rates of FLNF were low in primary rainforest on poor soils on the Guiana shield. Water was the most important rate-regulating factor and FLNF increased with increasing P, but decreased with increasing N. Our results support the general assumption that N fixation in tropical lowland forests is limited by P availability. © 2019, The Author(s). |
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Address |
Department of Microbiology and Ecosystem Science, University of Vienna, Althanstr. 14, Vienna, 1090, Austria |
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Springer International Publishing |
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0032079x (Issn) |
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EcoFoG @ webmaster @ |
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868 |
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Author |
Leroy, C.; Maes, A.Q.; Louisanna, E.; Séjalon-Delmas, N. |
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Title |
How significant are endophytic fungi in bromeliad seeds and seedlings? Effects on germination, survival and performance of two epiphytic plant species |
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Journal Article |
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Year |
2019 |
Publication |
Fungal Ecology |
Abbreviated Journal |
Fungal Ecol. |
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Volume |
39 |
Issue |
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Pages |
296-306 |
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Keywords |
Aechmea; Bromeliads; Endophytic fungi; Fusarium spp.; Germination; Survival; Trichoderma spp.; Vertical transmission |
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Abstract |
In bromeliads, nothing is known about the associations fungi form with seeds and seedling roots. We investigated whether fungal associations occur in the seeds and seedling roots of two epiphytic Aechmea species, and we explored whether substrate and fungal associations contribute to seed germination, and seedling survival and performance after the first month of growth. We found a total of 21 genera and 77 species of endophytic fungi in the seeds and seedlings for both Aechmea species by Illumina MiSeq sequencing. The fungal associations in seeds were found in the majority of corresponding seedlings, suggesting that fungi are transmitted vertically. Substrate quality modulated the germination and growth of seedlings, and beneficial endophytic fungi were not particularly crucial for germination but contributed positively to survival and growth. Overall, this study provides the first evidence of an endophytic fungal community in both the seeds and seedlings of two epiphytic bromeliads species that subsequently benefit plant growth. © 2019 Elsevier Ltd and British Mycological Society |
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Address |
INRA, UMR Ecologie des Forêts de Guyane (AgroParisTech, CIRAD, CNRS, INRA, Université de Guyane, Université des Antilles), Campus Agronomique, BP 316, Kourou cedex, F-97379, France |
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Elsevier Ltd |
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17545048 (Issn) |
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EcoFoG @ webmaster @ |
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867 |
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Author |
Fu, T.; Houel, E.; Amusant, N.; Touboul, D.; Genta-Jouve, G.; Della-Negra, S.; Fisher, G.L.; Brunelle, A.; Duplais, C. |
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Title |
Biosynthetic investigation of γ-lactones in Sextonia rubra wood using in situ TOF-SIMS MS/MS imaging to localize and characterize biosynthetic intermediates |
Type |
Journal Article |
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Year |
2019 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
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Volume |
9 |
Issue |
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Pages |
1928 |
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Abstract |
Molecular analysis by parallel tandem mass spectrometry (MS/MS) imaging contributes to the in situ characterization of biosynthetic intermediates which is crucial for deciphering the metabolic pathways in living organisms. We report the first use of TOF-SIMS MS/MS imaging for the cellular localization and characterization of biosynthetic intermediates of bioactive γ-lactones rubrynolide and rubrenolide in the Amazonian tree Sextonia rubra (Lauraceae). Five γ-lactones, including previously reported rubrynolide and rubrenolide, were isolated using a conventional approach and their structural characterization and localization at a lateral resolution of ~400 nm was later achieved using TOF-SIMS MS/MS imaging analysis. 2D/3D MS imaging at subcellular level reveals that putative biosynthetic γ-lactones intermediates are localized in the same cell types (ray parenchyma cells and oil cells) as rubrynolide and rubrenolide. Consequently, a revised metabolic pathway of rubrynolide was proposed, which involves the reaction between 2-hydroxysuccinic acid and 3-oxotetradecanoic acid, contrary to previous studies suggesting a single polyketide precursor. Our results provide insights into plant metabolite production in wood tissues and, overall, demonstrate that combining high spatial resolution TOF-SIMS imaging and MS/MS structural characterization offers new opportunities for studying molecular and cellular biochemistry in plants. © 2019, The Author(s). |
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Address |
Physical Electronics, Chanhassen, MN 55317, United States |
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Nature Publishing Group |
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20452322 (Issn) |
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EcoFoG @ webmaster @ |
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866 |
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Author |
Cantera, I.; Cilleros, K.; Valentini, A.; Cerdan, A.; Dejean, T.; Iribar, A.; Taberlet, P.; Vigouroux, R.; Brosse, S. |
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Title |
Optimizing environmental DNA sampling effort for fish inventories in tropical streams and rivers |
Type |
Journal Article |
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Year |
2019 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
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Volume |
9 |
Issue |
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Pages |
3085 |
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Abstract |
Environmental DNA (eDNA) metabarcoding is a promising tool to estimate aquatic biodiversity. It is based on the capture of DNA from a water sample. The sampled water volume, a crucial aspect for efficient species detection, has been empirically variable (ranging from few centiliters to tens of liters). This results in a high variability of sampling effort across studies, making comparisons difficult and raising uncertainties about the completeness of eDNA inventories. Our aim was to determine the sampling effort (filtered water volume) needed to get optimal inventories of fish assemblages in species-rich tropical streams and rivers using eDNA. Ten DNA replicates were collected in six Guianese sites (3 streams and 3 rivers), resulting in sampling efforts ranging from 17 to 340 liters of water. We show that sampling 34 liters of water detected more than 64% of the expected fish fauna and permitted to distinguish the fauna between sites and between ecosystem types (stream versus rivers). Above 68 liters, the number of detected species per site increased slightly, with a detection rate higher than 71%. Increasing sampling effort up to 340 liters provided little additional information, testifying that filtering 34 to 68 liters is sufficient to inventory most of the fauna in highly diverse tropical aquatic ecosystems. © 2019, The Author(s). |
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Address |
HYDRECO, Laboratoire Environnement de Petit Saut, B.P 823, Kourou Cedex, F-97388, French Guiana |
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Nature Publishing Group |
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20452322 (Issn) |
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no |
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EcoFoG @ webmaster @ |
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865 |
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