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Romero, G.Q.; Marino, N.A.C.; MacDonald, A.A.M.; Céréghino, R.; Trzcinski, M.K.; Mercado, D.A.; Leroy, C.; Corbara, B.; Farjalla, V.F.; Barberis, I.M.; Dézerald, O.; Hammill, E.; Atwood, T.B.; Piccoli, G.C.O.; Bautista, F.O.; Carrias, J.-F.; Leal, J.S.; Montero, G.; Antiqueira, P.A.P.; Freire, R.; Realpe, E.; Amundrud, S.L.; de Omena, P.M.; Campos, A.B.A.; Kratina, P.; O’Gorman, E.J.; Srivastava, D.S. |
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Title |
Extreme rainfall events alter the trophic structure in bromeliad tanks across the Neotropics |
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Journal Article |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal  |
Nat. Commun. |
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11 |
Issue |
3215 |
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fresh water; rain; fresh water; agricultural intensification; angiosperm; biomass; climate change; ecosystem function; extreme event; food web; freshwater ecosystem; Neotropic Ecozone; precipitation intensity; rainfall; trophic structure; Article; biomass; Central America; controlled study; detritivore; drought; flooding; food web; hydrology; microcosm; Neotropics; nonhuman; precipitation; predator; South America; trophic level; animal; biodiversity; Bromelia; climate change; ecosystem; flooding; food chain; Central America; South America; Animals; Biodiversity; Biomass; Bromelia; Climate Change; Droughts; Ecosystem; Floods; Food Chain; Fresh Water; Hydrology; South America |
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Changes in global and regional precipitation regimes are among the most pervasive components of climate change. Intensification of rainfall cycles, ranging from frequent downpours to severe droughts, could cause widespread, but largely unknown, alterations to trophic structure and ecosystem function. We conducted multi-site coordinated experiments to show how variation in the quantity and evenness of rainfall modulates trophic structure in 210 natural freshwater microcosms (tank bromeliads) across Central and South America (18°N to 29°S). The biomass of smaller organisms (detritivores) was higher under more stable hydrological conditions. Conversely, the biomass of predators was highest when rainfall was uneven, resulting in top-heavy biomass pyramids. These results illustrate how extremes of precipitation, resulting in localized droughts or flooding, can erode the base of freshwater food webs, with negative implications for the stability of trophic dynamics. © 2020, The Author(s). |
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Institute of Biological Sciences, Universidade Federal do Pará, Belém, PA, Brazil |
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Nature Research |
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20411723 (Issn) |
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EcoFoG @ webmaster @ |
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944 |
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Esquivel-Muelbert, A.; Phillips, O.L.; Brienen, R.J.W.; Fauset, S.; Sullivan, M.J.P.; Baker, T.R.; Chao, K.-J.; Feldpausch, T.R.; Gloor, E.; Higuchi, N.; Houwing-Duistermaat, J.; Lloyd, J.; Liu, H.; Malhi, Y.; Marimon, B.; Marimon Junior, B.H.; Monteagudo-Mendoza, A.; Poorter, L.; Silveira, M.; Torre, E.V.; Dávila, E.A.; del Aguila Pasquel, J.; Almeida, E.; Loayza, P.A.; Andrade, A.; Aragão, L.E.O.C.; Araujo-Murakami, A.; Arets, E.; Arroyo, L.; Aymard C, G.A.; Baisie, M.; Baraloto, C.; Camargo, P.B.; Barroso, J.; Blanc, L.; Bonal, D.; Bongers, F.; Boot, R.; Brown, F.; Burban, B.; Camargo, J.L.; Castro, W.; Moscoso, V.C.; Chave, J.; Comiskey, J.; Valverde, F.C.; da Costa, A.L.; Cardozo, N.D.; Di Fiore, A.; Dourdain, A.; Erwin, T.; Llampazo, G.F.; Vieira, I.C.G.; Herrera, R.; Honorio Coronado, E.; Huamantupa-Chuquimaco, I.; Jimenez-Rojas, E.; Killeen, T.; Laurance, S.; Laurance, W.; Levesley, A.; Lewis, S.L.; Ladvocat, K.L.L.M.; Lopez-Gonzalez, G.; Lovejoy, T.; Meir, P.; Mendoza, C.; Morandi, P.; Neill, D.; Nogueira Lima, A.J.; Vargas, P.N.; de Oliveira, E.A.; Camacho, N.P.; Pardo, G.; Peacock, J.; Peña-Claros, M.; Peñuela-Mora, M.C.; Pickavance, G.; Pipoly, J.; Pitman, N.; Prieto, A.; Pugh, T.A.M.; Quesada, C.; Ramirez-Angulo, H.; de Almeida Reis, S.M.; Rejou-Machain, M.; Correa, Z.R.; Bayona, L.R.; Rudas, A.; Salomão, R.; Serrano, J.; Espejo, J.S.; Silva, N.; Singh, J.; Stahl, C.; Stropp, J.; Swamy, V.; Talbot, J.; ter Steege, H.; Terborgh, J.; Thomas, R.; Toledo, M.; Torres-Lezama, A.; Gamarra, L.V.; van der Heijden, G.; van der Meer, P.; van der Hout, P.; Martinez, R.V.; Vieira, S.A.; Cayo, J.V.; Vos, V.; Zagt, R.; Zuidema, P.; Galbraith, D. |
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Title |
Tree mode of death and mortality risk factors across Amazon forests |
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Journal Article |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
Nat. Commun. |
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Volume |
11 |
Issue |
5515 |
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Keywords |
bioclimatology; carbon sink; ecological modeling; growth; holistic approach; mortality; mortality risk; risk factor; survival; trade-off; tropical forest; article; climate; controlled study; forest; growth rate; human; mortality rate; mortality risk; survival; biological model; biomass; Brazil; carbon sequestration; ecology; ecosystem; environmental monitoring; growth, development and aging; proportional hazards model; risk factor; tree; tropic climate; Amazonia; carbon dioxide; Biomass; Brazil; Carbon Dioxide; Carbon Sequestration; Ecology; Ecosystem; Environmental Monitoring; Forests; Models, Biological; Proportional Hazards Models; Risk Factors; Trees; Tropical Climate |
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The carbon sink capacity of tropical forests is substantially affected by tree mortality. However, the main drivers of tropical tree death remain largely unknown. Here we present a pan-Amazonian assessment of how and why trees die, analysing over 120,000 trees representing > 3800 species from 189 long-term RAINFOR forest plots. While tree mortality rates vary greatly Amazon-wide, on average trees are as likely to die standing as they are broken or uprooted—modes of death with different ecological consequences. Species-level growth rate is the single most important predictor of tree death in Amazonia, with faster-growing species being at higher risk. Within species, however, the slowest-growing trees are at greatest risk while the effect of tree size varies across the basin. In the driest Amazonian region species-level bioclimatic distributional patterns also predict the risk of death, suggesting that these forests are experiencing climatic conditions beyond their adaptative limits. These results provide not only a holistic pan-Amazonian picture of tree death but large-scale evidence for the overarching importance of the growth–survival trade-off in driving tropical tree mortality. © 2020, The Author(s). |
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Tropenbos International, Wageningen, Netherlands |
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Nature Research |
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20411723 (Issn) |
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EcoFoG @ webmaster @ |
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945 |
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Thomas, H.J.D.; Bjorkman, A.D.; Myers-Smith, I.H.; Elmendorf, S.C.; Kattge, J.; Diaz, S.; Vellend, M.; Blok, D.; Cornelissen, J.H.C.; Forbes, B.C.; Henry, G.H.R.; Hollister, R.D.; Normand, S.; Prevéy, J.S.; Rixen, C.; Schaepman-Strub, G.; Wilmking, M.; Wipf, S.; Cornwell, W.K.; Beck, P.S.A.; Georges, D.; Goetz, S.J.; Guay, K.C.; Rüger, N.; Soudzilovskaia, N.A.; Spasojevic, M.J.; Alatalo, J.M.; Alexander, H.D.; Anadon-Rosell, A.; Angers-Blondin, S.; te Beest, M.; Berner, L.T.; Björk, R.G.; Buchwal, A.; Buras, A.; Carbognani, M.; Christie, K.S.; Collier, L.S.; Cooper, E.J.; Elberling, B.; Eskelinen, A.; Frei, E.R.; Grau, O.; Grogan, P.; Hallinger, M.; Heijmans, M.M.P.D.; Hermanutz, L.; Hudson, J.M.G.; Johnstone, J.F.; Hülber, K.; Iturrate-Garcia, M.; Iversen, C.M.; Jaroszynska, F.; Kaarlejarvi, E.; Kulonen, A.; Lamarque, L.J.; Lantz, T.C.; Lévesque, E.; Little, C.J.; Michelsen, A.; Milbau, A.; Nabe-Nielsen, J.; Nielsen, S.S.; Ninot, J.M.; Oberbauer, S.F.; Olofsson, J.; Onipchenko, V.G.; Petraglia, A.; Rumpf, S.B.; Shetti, R.; Speed, J.D.M.; Suding, K.N.; Tape, K.D.; Tomaselli, M.; Trant, A.J.; Treier, U.A.; Tremblay, M.; Venn, S.E.; Vowles, T.; Weijers, S.; Wookey, P.A.; Zamin, T.J.; Bahn, M.; Blonder, B.; van Bodegom, P.M.; Bond-Lamberty, B.; Campetella, G.; Cerabolini, B.E.L.; Chapin, F.S., III; Craine, J.M.; Dainese, M.; Green, W.A.; Jansen, S.; Kleyer, M.; Manning, P.; Niinemets, Ü.; Onoda, Y.; Ozinga, W.A.; Peñuelas, J.; Poschlod, P.; Reich, P.B.; Sandel, B.; Schamp, B.S.; Sheremetiev, S.N.; de Vries, F.T. |
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Title |
Global plant trait relationships extend to the climatic extremes of the tundra biome |
Type |
Journal Article |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
Nat. Commun. |
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Volume |
11 |
Issue |
1351 |
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Keywords |
biome; climate change; extreme event; global change; growth; interspecific interaction; plant community; tundra; article; plant community; prediction; tundra; warming; classification; climate; ecosystem; genetics; plant; plant development; Climate; Ecosystem; Plant Development; Plants; Tundra |
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The majority of variation in six traits critical to the growth, survival and reproduction of plant species is thought to be organised along just two dimensions, corresponding to strategies of plant size and resource acquisition. However, it is unknown whether global plant trait relationships extend to climatic extremes, and if these interspecific relationships are confounded by trait variation within species. We test whether trait relationships extend to the cold extremes of life on Earth using the largest database of tundra plant traits yet compiled. We show that tundra plants demonstrate remarkably similar resource economic traits, but not size traits, compared to global distributions, and exhibit the same two dimensions of trait variation. Three quarters of trait variation occurs among species, mirroring global estimates of interspecific trait variation. Plant trait relationships are thus generalizable to the edge of global trait-space, informing prediction of plant community change in a warming world. © 2020, Crown. |
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Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Postbus 94240, Amsterdam, 1090 GE, Netherlands |
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Nature Research |
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20411723 (Issn) |
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EcoFoG @ webmaster @ |
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947 |
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Groc, S.; Delabie, J.H.C.; Fernández, F.; Leponce, M.; Orivel, J.; Silvestre, R.; Vasconcelos, H.L.; Dejean, A. |
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Leaf-litter ant communities (Hymenoptera: Formicidae) in a pristine Guianese rain-forest: Stable functional structure versus high species turnover |
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Journal Article |
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Year |
2014 |
Publication |
Myrmecological News |
Abbreviated Journal |
Myrmecological News |
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19 |
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43-51 |
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Diversity gradient; Functional groups; Habitat heterogeneity; Litter-dwelling ant communities; Local scale; Pristine Amazonian rainforest; Taxonomic and functional structure |
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We compared the ant assemblages from four very heterogeneous habitats over a short-distance elevational gradient of vegetation (due to the presence of an inselberg) at the Nouragues Research Station, French Guiana. We focused on litter-dwelling ants, combining the use of pitfall traps and the Winkler method according to the Ants of the Leaf Litter Proto-col. This permitted us to note (1) a high leaf-litter ant diversity overall and a decreasing diversity gradient from the lowland rainforest to the top of the inselberg, and (2) differences in species density, composition and functional struc-ture. While the ant assemblages on the plateau and inselberg can be considered functionally similar and typical of an Amazonian rainforest, that of the transition forest, relatively homogenous, rather corresponded to an ant fauna typical of open areas. By contrast, the liana forest assemblage was unexpectedly richer and denser than the others, sheltering a litter-dwelling ant fauna dominated by numerous and abundant cryptic species. These taxonomical and functional dissi-milarities may reflect the influence of the environmental heterogeneity, which, through variable abiotic conditions, can contribute to maintaining a notably rich ant biodiversity in these Neotropical habitats. |
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Université de Toulouse, UPS (Ecolab), 118 route de Narbonne, 31062 Toulouse Cedex 9, France |
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19944136 (Issn) |
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Export Date: 10 March 2014; Source: Scopus; Language of Original Document: English; Correspondence Address: Groc, S.; Instituto de Biologia, Universidade Federal de Uberlândia (UFU), 38400-902 Uberlândia, Minas Gerais, Brazil; email: groc.sarah@gmail.com |
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EcoFoG @ webmaster @ |
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534 |
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Dejean, A.; Corbara, B.; Roux, O.; Orivel, J. |
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The antipredatory behaviours of neotropical ants towards army ant raids (Hymenoptera: Formicidae) |
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Journal Article |
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Year |
2014 |
Publication |
Myrmecological News |
Abbreviated Journal |
Myrmecological News |
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19 |
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17-24 |
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Antipredatory behaviour; Army ants; Ecitoninae; Prey-ant species |
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Group hunting, nomadism, wingless queens and colony fission characterize army ants, allowing them to have become the main tropical arthropod predators, mostly of other social insects. We studied the reactions of different ant species to the New World army ants Eciton burchellii (WESTWOOD, 1842) and E. hamatum (FABRICIUS, 1782) (Ecitoninae). We compiled our results with those already known in a synthetic appendix. A wide range of ant species react to the ap-proach of army ant raids by evacuating their nests with several workers transporting brood. The Eciton plunder a large part of the brood but rarely kill workers or queens, so that the latter return to their nest and resume colony activity. One exception is Paratrechina longicornis (LATREILLE, 1802) colonies that quickly evacuate their nest, so that the entire col-ony can generally escape a raid. Another is Leptogenys mexicana (MAYR, 1870) that leave their nests in columns while some nestmates resist the attack; they therefore lose only a few larvae. We noted that colonies can avoid being raided if the army ants ignore them (Atta cephalotes (LINNAEUS, 1758)), or if the workers produce a repellent substance (Azteca associated with myrmecophytic Cecropia) or are repellent themselves (Pachycondyla villosa (FABRICIUS, 1804), Ec-tatomma spp.). In the other cases, a part of the brood is lost. When an Eciton raid approached the base of their host-tree trunk, Azteca andreae GUERRERO, DELABIE and DEJEAN, 2010 workers dropped a part of their brood on the ground. While numerous Eciton workers were gathering up this brood, the front of the column advanced, so that the Azteca andreae nests were not plundered. Pheidole megacephala (FABRICIUS, 1793) nests were partly plundered as the workers reacted aggressively, blocking the Eciton inside their nests during a long time. When the latter returned toward their bivouac, they were attacked and killed by their nestmates whether or not they had retrieved Pheidole brood. Consequently, the front of the column turned away from the Pheidole nest. |
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Maladies Infectieuses et Vecteurs, Evolution et Contrôle (UMR- IRD 224) Équipe BEES, IRD 01, BP 171 Bobo-Dioulasso, Burkina Faso |
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Export Date: 10 March 2014; Source: Scopus; Language of Original Document: English; Correspondence Address: Dejean, A.; Écologie des Forêts de Guyane (UMR-CNRS 8172), Campus agronomique, BP 316, 97379 Kourou cedex, France; email: alain.dejean@wanadoo.fr |
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EcoFoG @ webmaster @ |
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535 |
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Kenne, M.; Feneron, R.; Djieto-Lordon, C.; Malherbe, M.C.; Tindo, M.; Ngnegueu, P.R.; Dejean, A. |
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Title |
Nesting and foraging habits in the arboreal ant Atopomyrmex mocquerysi ANDRE, 1889 (Hymenoptera: Formicidae: Myrmicinae) |
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Journal Article |
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Year |
2009 |
Publication |
Myrmecological News |
Abbreviated Journal |
Myrmecol. News |
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12 |
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109-115 |
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Cameroon; wood-excavating ant; nest site selection; pest ant; predatory behavior; rhythm of activity; life history |
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Atopomyrmex mocquerysi ANDRE, 1889 is a West-Central African wood-excavating myrmicine species whose colonies construct galleries in the main live branches of their host trees, causing the distal parts of these branches to dry out. In southeastern Cameroon, this species was mainly found in woody savannahs that are burned annually. It was also present in the canopy of a secondary forest, but was relatively rare on trees growing along forest edges and entirely absent from the canopy of an old-growth forest. It was absent from oil palm and coffee tree plantations, rare on cocoa trees. present on 0.2% to 5.3% of the avocado, guava, mango and Citrus spp. trees monitored, and frequent on safoo trees (12.4%). A fire in a mango plantation seems to have favored its presence. The colonies generally exploit Aleyrodidae, Aphididae, Coccidae, and Stictococcidae. Workers forage for prey diurnally, mostly on the ground. Their predatory behavior is characterized by detection through contact. Workers recruit nestmates at short-range (within range of an alarm pheromone), rarely at long-range, after which they spread-eagle the prey and immediately cut it up on the spot. Individual workers retrieve the prey pieces. Unlike other territorially-dominant arboreal ants, A. mocquerysi is a threat to host trees because. in addition to being a wood-excavating species, its workers only slightly protect the foliage of their host tree from herbivorous insects since they mostly hunt on the ground. |
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[Kenne, Martin; Tindo, Maurice] Univ Douala, Fac Sci, Dept Biol Organismes Anim, Douala, Cameroon, Email: medoum68@yahoo.fr |
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OESTERREICHISCHE GESELL ENTOMOFAUNISTIK, C/O NATURHISTOR MUSEUM WIEN |
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1994-4136 |
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ISI:000271357700012 |
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EcoFoG @ eric.marcon @ |
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97 |
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Orivel, J.; Leroy, C. |
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The diversity and ecology of ant gardens (Hymenoptera: Formicidae; Spermatophyta: Angiospermae) |
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Journal Article |
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2011 |
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Myrmecological News |
Abbreviated Journal |
Myrmecol. News |
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14 |
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73-85 |
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Ant-plant interactions; epiphytes; mutualisms; Neotropics; Paleotropics; phytotelm; parabiosis; seed dispersal; review |
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Mutualistic interactions between ants and plants are important features of many ecosystems, and they can be divided into three main categories: dispersal and protective mutualisms and myrmecotrophy. In both the Neotropics and the Southeastern Asian Paleotropics, ant gardens (AGs), a particular type of ant-plant interaction, are frequent. To initiate AGs, ants integrate the seeds of certain epiphyte species into the carton of their nest. The development of the plants leads to the formation of a cluster of epiphytes rooted in the carton. They have been defined as one of the most complex associations between ants and plants known because of the plurispecific, but also specialized nature of the association involving several phylogenetically-distant ant and plant species. The aim of this review is to provide a synthesis of the diversity and ecology of AGs, including the outcomes experienced by the partners in the interaction and the direct and indirect impacts ant-garden ants have on the plant and arthropod communities. |
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[Orivel, Jerome; Leroy, Celine] CNRS, UMR Ecol Forets Guyane, Kourou 97379, French Guiana, Email: jerome.orivel@ecofog.gf |
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OESTERREICHISCHE GESELL ENTOMOFAUNISTIK, C/O NATURHISTOR MUSEUM WIEN |
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1994-4136 |
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ISI:000286844100009 |
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EcoFoG @ webmaster @ |
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292 |
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Groc, S.; Delabie, J.H.C.; Fernández, F.; Leponce, M.; Orivel, J.; Silvestre, R.; Vasconcelos, H.L.; Dejean, A. |
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Title |
Leaf-litter ant communities in a pristine Guianese rainforest: stable functional structure versus high species turnover |
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Journal Article |
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2013 |
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Myrmecological News |
Abbreviated Journal |
Myrmecol. News |
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19 |
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43-51 |
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EcoFoG @ webmaster @ |
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523 |
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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. |
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The ectomycorrhizal fungus Scleroderma bermudense alleviates salt stress in seagrape (Coccoloba uvifera L.) seedlings |
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2006 |
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Mycorrhiza |
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Mycorrhiza |
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16 |
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8 |
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559-565 |
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Coccoloba uvifera; ectomycorrhizal dependency; mineral uptake; salt stress; water status |
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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. |
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Univ Antilles Guyane, Fac Sci Exactes & Nat, Lab Biol & Physiol Vegetales, F-97159 Guadeloupe, France, Email: amadou.ba@univ-ag.fr |
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SPRINGER |
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0940-6360 |
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ISI:000241687200006 |
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EcoFoG @ eric.marcon @ |
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221 |
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Henkel, T.W.; Wilson, A.W.; Aime, M.C.; Dierks, J.; Uehling, J.K.; Roy, M.; Schimann, H.; Wartchow, F.; Mueller, G.M. |
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Cantharellaceae of Guyana II: New species of Craterellus, new South American distribution records for Cantharellus guyanensis and Craterellus excelsus, and a key to the Neotropical taxa |
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2014 |
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Mycologia |
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Mycologia |
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106 |
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2 |
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307-324 |
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Cantharellales; Coccoloba; Dicymbe; Ectomycorrhizae; Guiana shield; Tropical fungi |
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Craterellus olivaceoluteus sp. nov. and Craterellus cinereofimbriatus sp. nov. are described as new to science. These fungi were collected from Guyana in association with ectomycorrhizal host trees in the genera Dicymbe (Fabaceae subfam. Caesalpinioideae) and Pakaraimaea (Dipterocarpaceae). Cantharellus guyanensis Mont., originally described from French Guiana, is redescribed from recent collections from Guyana, with additional range extensions for the species provided based on material examined from French Guiana, Venezuela, and north central, northeastern and southern Brazil, circumscribing nearly the entire Guiana Shield region and beyond. A new distribution record from French Guiana is provided for Craterellus excelsus T.W. Henkel & Aime. Macromorphological, micromorphological and habitat data are provided for the new species and C. guyanensis as well as DNA sequence data from the nuclear ribosomal regions of the internal transcribed spacer (ITS) and 28S large subunit (LSU); additional sequence data is provided for C. guyanensis and C. excelsus specimens collected outside Guyana. The relationships of these taxa within the Cantharellaceae were evaluated with phylogenetic analyses of ITS and LSU sequence data. This work brings the total number of Cantharellaceae species known from Guyana to eight. A key to the Cantharellus and Craterellus species known from the lowland Neotropics and extralimital montane Central and South America is provided. © 2014 by The Mycological Society of America. |
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Department of Biological Sciences, Boise State University, Boise, ID, 83725, United States |
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Allen Press Inc. |
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15572536 (Issn) |
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Export Date: 10 June 2014; Coden: Mycoa; Correspondence Address: Henkel, T.W.; Department of Biological Sciences, Humboldt State University, Arcata, CA 95521, United States; email: twh5@humboldt.edu; Funding Details: DEB-0732968, NSF, National Science Foundation |
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546 |
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