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Kunstler, G.; Falster, D.; Coomes, D.A.; Hui, F.; Kooyman, R.M.; Laughlin, D.C.; Poorter, L.; Vanderwel, M.; Vieilledent, G.; Wright, S.J.; Aiba, M.; Baraloto, C.; Caspersen, J.; Cornelissen, J.H.C.; Gourlet-Fleury, S.; Hanewinkel, M.; Herault, B.; Kattge, J.; Kurokawa, H.; Onoda, Y.; Peñuelas, J.; Poorter, H.; Uriarte, M.; Richardson, S.; Ruiz-Benito, P.; Sun, I.-F.; Ståhl, G.; Swenson, N.G.; Thompson, J.; Westerlund, B.; Wirth, C.; Zavala, M.A.; Zeng, H.; Zimmerman, J.K.; Zimmermann, N.E.; Westoby, M. |
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Title |
Plant functional traits have globally consistent effects on competition |
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Journal Article |
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2016 |
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Nature |
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Nature |
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529 |
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7585 |
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204-207 |
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Phenotypic traits and their associated trade-offs have been shown to have globally consistent effects on individual plant physiological functions, but how these effects scale up to influence competition, a key driver of community assembly in terrestrial vegetation, has remained unclear. Here we use growth data from more than 3 million trees in over 140,000 plots across the world to show how three key functional traits – wood density, specific leaf area and maximum height – consistently influence competitive interactions. Fast maximum growth of a species was correlated negatively with its wood density in all biomes, and positively with its specific leaf area in most biomes. Low wood density was also correlated with a low ability to tolerate competition and a low competitive effect on neighbours, while high specific leaf area was correlated with a low competitive effect. Thus, traits generate trade-offs between performance with competition versus performance without competition, a fundamental ingredient in the classical hypothesis that the coexistence of plant species is enabled via differentiation in their successional strategies. Competition within species was stronger than between species, but an increase in trait dissimilarity between species had little influence in weakening competition. No benefit of dissimilarity was detected for specific leaf area or wood density, and only a weak benefit for maximum height. Our trait-based approach to modelling competition makes generalization possible across the forest ecosystems of the world and their highly diverse species composition. © 2016 Macmillan Publishers Limited. All rights reserved. |
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Forestry and Forest Products Research Institute, Tsukuba, Japan |
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Cited By :1; Export Date: 29 January 2016 |
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EcoFoG @ webmaster @ |
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653 |
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Lacau, S.; Groc, S.; Dejean, A.; Oliveira, M.L.D.; Delabie, J.H.C. |
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Tatuidris kapasi sp. nov.: A new armadillo ant from French Guiana (Formicidae: Agroecomyrmecinae) |
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2012 |
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Psyche |
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Psyche |
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926089 |
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1-6 |
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Tatuidris kapasi sp. nov. (Formicidae: Agroecomyrmecinae), the second known species of “armadillo ant”, is described after a remarkable specimen collected in French Guiana. This species can be easily distinguished from Tatuidris tatusia by characters related to the shape of the mesosoma and petiole as well as to the pilosity, the sculpture, and the color. Copyright © 2012 Sébastien Lacau et al. |
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Laboratório de Mirmecologia, CEPLAC/CEPEC/SECEN, CP 07, km 22, Rodovia, Ilhéus-Itabuna, 45600-970 Itabuna, BA, Brazil |
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00332615 (Issn) |
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Export Date: 28 March 2012; Source: Scopus; Art. No.: 926089; doi: 10.1155/2012/926089; Language of Original Document: English; Correspondence Address: Lacau, S.; Laboratório de Biossistemática Animal, Universidade Estadual Do Sudoeste da Bahia, UESB/DEBI, 45700-000 Itapetinga, BA, Brazil; email: slacau@cepec.gov.br |
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EcoFoG @ webmaster @ |
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389 |
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Lachenaud, P.; Rossi, V.; Thevenin, J.-M.; Doaré, F. |
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The “Guiana” genetic group: A new source of resistance to cacao (Theobroma cacao L.) black pod rot caused by Phytophthora capsici |
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Journal Article |
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2015 |
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Crop Protection |
Abbreviated Journal |
Crop Prot. |
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67 |
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91-95 |
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Black pod; Cocoa; French guiana; Phytophthora capsici; Resistance; Phytophthora capsici; Theobroma cacao |
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Black pod rot, caused by Stramenopiles of the genus Phytophthora, leads to serious production losses in all cocoa growing zones. In order to reduce the impact of these pests, preference is given to genetic control using resistant varieties, and sources of resistance are actively being sought, particularly in wild cacao trees. Surveys were undertaken in the natural cacao tree populations of south-eastern French Guiana between 1985 and 1995 and an abundant amount of plant material belonging to a particular genetic group, the “Guiana” group, was collected. A great deal of work has shown the merits of this genetic group as a source of resistance to Phytophthora palmivora and megakarya. We describe here the results of a global study to assess the resistance of the 186 clones in the “Guiana” group “core collection” to a Guianese strain of Phytophthora capsici (strain Reg 2-6). This study, which used an efficient methodology (fifteen series of tests on leaf discs and a statistical test adapted to the ordinal nature of the basic data), showed that the “Guiana” genetic group is a major source of resistance to P.capsici. Strain Reg 2-6 proves to be particularly virulent, as the Scavina 6 control, an international reference for resistance to Phytophthora, is not resistant to it. However, 24 clones of the “Guiana” group are, and 92 have proved to be more resistant than Scavina 6, thereby showing the interest of the group in genetically controlling P.capsici.Thus, of the clones in the Guiana group that are more resistant to P.capsici than Scavina 6, some, which are also resistant to P.palmivora and/or Phytophthora megakarya, and also displaying some other notable qualities, could be incorporated into cocoa genetic improvement programmes in countries where P.capsici is rife on cacao trees. |
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CIRAD, UPR BSEF, BP 2572Yaoundé, Cameroon |
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Elsevier Ltd |
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02612194 (Issn) |
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Export Date: 12 November 2014; Coden: Crptd; Correspondence Address: Lachenaud, P.; CIRAD, UPR 106, BP 701, France |
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EcoFoG @ webmaster @ |
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565 |
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Lalague, H.; Csilléry, K.; Oddou-Muratorio, S.; Safrana, J.; de Quattro, C.; Fady, B.; González-Martínez, S.C.; Vendramin, G.G. |
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Title |
Nucleotide diversity and linkage disequilibrium at 58 stress response and phenology candidate genes in a European beech (Fagus sylvatica L.) population from southeastern France |
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Journal Article |
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Year |
2014 |
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Tree Genetics and Genomes |
Abbreviated Journal |
Tree Genetics and Genomes |
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10 |
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1 |
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15-26 |
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Climate adaptation; Effective population size; Forest tree; Genomic diversity; Minor allele frequency (MAF); Recombination rate; Single nucleotide polymorphism (SNP) |
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European beech (Fagus sylvatica L.) is one of the most economically and ecologically important deciduous trees in Europe, yet little is known about its genomic diversity and its adaptive potential. Here, we detail the discovery and analysis of 573 single nucleotide polymorphisms (SNPs) from 58 candidate gene fragments that are potentially involved in abiotic stress response and budburst phenology using a panel of 96 individuals from southeastern France. The mean nucleotide diversity was low (θ π = 2.2 × 10-3) but extremely variable among gene fragments (range from 0.02 to 10), with genes carrying insertion/deletion mutations exhibiting significantly higher diversity. The decay of linkage disequilibrium (LD) measured at gene fragments >800 base pairs was moderate (the half distance of r 2 was 154 bp), consistent with the low average population-scaled recombination rate (ρ = 5.4 × 10-3). Overall, the population-scaled recombination rate estimated in F. sylvatica was lower than for other angiosperm tree genera (such as Quercus or Populus) and similar to conifers. As a methodological perspective, we explored the effect of minimum allele frequency (MAF) on LD and showed that higher MAF resulted in slower decay of LD. It is thus essential that the same MAF is used when comparing the decay of LD among different studies and species. Our results suggest that genome-wide association mapping can be a potentially efficient approach in F. sylvatica, which has a relatively small genome size. © 2013 Springer-Verlag Berlin Heidelberg. |
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Department of Forest Ecology and Genetics, National Institute for Agriculture and Food Research and Technology (INIA), Forest Research Centre (CIFOR), 28040 Madrid, Spain |
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Cited By :1; Export Date: 13 January 2015 |
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EcoFoG @ webmaster @ |
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578 |
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Lamarre, G.P.A.; Amoretti, D.S.; Baraloto, C.; Bénéluz, F.; Mesones, I.; Fine, P.V.A. |
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Phylogenetic Overdispersion in Lepidoptera Communities of Amazonian White-sand Forests |
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Journal Article |
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2016 |
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Biotropica |
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Biotropica |
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48 |
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1 |
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101-109 |
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varillales; Amazon basin; Bottom-up; Lepidoptera composition; Moth, Nymphalidae; Phylogenetic structure |
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In the Amazon basin and the Guiana Shield, white-sand (WS) forests are recognized as a low-resource habitat often composed by a distinct flora with many edaphic endemic plants. Small patches of nutrient-poor white-sand forests can pose a series of challenges to plants and animals. For plants, these challenges have been shown to function as strong filters that in turn drive taxonomic, functional and phylogenetic plant composition. However, very little is known about animal communities in WS forest and the effect that low-resource availability may have on higher trophic levels. Here, we investigate the diversity of both taxonomic and phylogenetic diversity of three Lepidoptera families' (Nymphalidae, Saturniidae, and Sphingidae) assemblages between low-resource (White-Sand Forest) and two adjacent high-resource habitats, terra firme clay and seasonally flooded forests. We found no clear effect of habitat type on taxonomic composition although butterfly and moth species abundance differed among the three contrasted habitats. The WS forest Lepidoptera community is significantly more phylogenetically overdispersed than expected by chance. We suggest that these low-resource habitats filter the number of plant lineages which, in turn, creates a bottom-up control structuring Lepidoptera phylogenetic structure. We recommend long-term sampling on Lepidoptera community both at larval and adult stages that may complement this study and test hypotheses linking herbivore phylogenetic structure to plant resource availability and trophic cascade theory. © 2016 The Association for Tropical Biology and Conservation. |
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Department of Biological Sciences, International Center for Tropical Botany, Florida International University, Miami, FL, United States |
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Cited By :1; Export Date: 12 February 2016 |
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EcoFoG @ webmaster @ |
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661 |
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Lamarre, G.P.A.; Baraloto, C.; Fortunel, C.; Dávila, N.; Mesones, I.; Rios, J.G.; Ríos, M.; Valderrama, E.; Pilco, M.V.; Fine, P.V.A. |
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Herbivory, growth rates, and habitat specialization in tropical tree lineages: implications for Amazonian beta-diversity |
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2012 |
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Ecology |
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Ecology |
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93 |
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sp8 |
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S195-S210 |
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Ecological Society of America |
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0012-9658 |
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doi: 10.1890/11-0397.1 |
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459 |
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Lamarre, G.P.A.; Decaëns, T.; Rougerie, R.; Barbut, J.; Dewaard, J.R.; Hebert, P.D.N.; Herbin, D.; Laguerre, M.; Thiaucourt, P.; Bonifacio Martins, M. |
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An integrative taxonomy approach unveils unknown and threatened moth species in Amazonian rainforest fragments |
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2016 |
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Insect Conservation and Diversity |
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Insect Conserv Divers |
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9 |
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5 |
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475-479 |
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Amazonian forest; Belém center of endemism; centinelan extinction; conservation; DNA barcoding; Lepidoptera; species discovery |
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This study focuses on the importance in hyperdiverse regions, such as the Amazonian forest, of accelerating and optimising the census of invertebrate communities.
We carried out low-intensity sampling of tropical moth (Lepidoptera) assemblages in disturbed forest fragments in Brazil.
We combined DNA barcoding and taxonomists’ expertise to produce fast and accurate surveys of local diversity, including the recognition and census of undescribed and endemic species.
Integrating expert knowledge of species distributions, we show that despite limited sampling effort, our approach revealed an unexpectedly high number of new and endemic species in severely threatened tropical forest fragments.
These results highlight the risk of silent centinelan extinctions and emphasise the urgent need for accelerated invertebrate surveys in high-endemism and human-impacted tropical forests. |
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1752-4598 |
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EcoFoG @ webmaster @ |
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730 |
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Lamarre, G.P.A.; Herault, B.; Fine, P.V.A.; Vedel, V.; Lupoli, R.; Mesones, I.; Baraloto, C. |
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Taxonomic and functional composition of arthropod assemblages across contrasting Amazonian forests |
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Journal Article |
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2016 |
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Journal of Animal Ecology |
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Journal of Animal Ecology |
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85 |
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1 |
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227-239 |
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Amazon; Arthropod community; Environmental filtering; Forest habitat; French Guiana; Functional composition; Mass sampling; Peru; Trophic cascades |
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Arthropods represent most of global biodiversity, with the highest diversity found in tropical rain forests. Nevertheless, we have a very incomplete understanding of how tropical arthropod communities are assembled. We conducted a comprehensive mass sampling of arthropod communities within three major habitat types of lowland Amazonian rain forest, including terra firme clay, white-sand and seasonally flooded forests in Peru and French Guiana. We examined how taxonomic and functional composition (at the family level) differed across these habitat types in the two regions. The overall arthropod community composition exhibited strong turnover among habitats and between regions. In particular, seasonally flooded forest habitats of both regions comprised unique assemblages. Overall, 17·7% (26 of 147) of arthropod families showed significant preferences for a particular habitat type. We present a first reproducible arthropod functional classification among the 147 taxa based on similarity among 21 functional traits describing feeding source, major mouthparts and microhabitats inhabited by each taxon. We identified seven distinct functional groups whose relative abundance contrasted strongly across the three habitats, with sap and leaf feeders showing higher abundances in terra firme clay forest. Our novel arthropod functional classification provides an important complement to link these contrasting patterns of composition to differences in forest functioning across geographical and environmental gradients. This study underlines that both environment and biogeographical processes are responsible for driving arthropod taxonomic composition while environmental filtering is the main driver of the variance in functional composition. © 2016 British Ecological Society. |
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International Center for Tropical Botany, Department of Biological Sciences, International Center for Tropical Botany, Florida International University, Miami, FL, United States |
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Cited By :1; Export Date: 17 February 2017 |
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EcoFoG @ webmaster @ |
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731 |
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Lamarre, G.P.A.; Mendoza, I.; Fine, P.V.A.; Baraloto, C. |
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Leaf synchrony and insect herbivory among tropical tree habitat specialists |
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Journal Article |
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2014 |
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Plant Ecology |
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Plant Ecol. |
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215 |
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2 |
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209-220 |
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Escape; French Guiana; Herbivorous insects; Phenology; Resource availability; Time lag |
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Growth defense tradeoff theory predicts that plants in low-resource habitats invest more energy in defense mechanisms against natural enemies than growth, whereas plants in high-resource habitats can afford higher leaf loss rates. A less-studied defense against herbivores involves the synchrony of leaf production, which can be an effective defense strategy if leaf biomass production exceeds the capacity of consumption by insects. The aim of this study was to determine whether leaf synchrony varied across habitats with different available resources and whether insects were able to track young leaf production among tree habitat specialists in a tropical forest of French Guiana. We predicted that high-resource habitats would exhibit more synchrony in leaf production due to the low cost and investment to replace leaf tissue. We also expected closer patterns of leaf synchrony and herbivory within related species, assuming that they shared herbivores. We simultaneously monitored leaf production and herbivory rates of five pairs of tree species, each composed of a specialist of terra firme or white-sand forests within the same lineage. Our prediction was not supported by the strong interaction of habitat and lineage for leaf synchrony within individuals of the same species; although habitat specialists differed in leaf synchrony within four of five lineages, the direction of the effect was variable. All species showed short time lags for the correlation between leaf production and herbivory, suggesting that insects are tightly tracking leaf production, especially for the most synchronous species. Leaf synchrony may provide an important escape defense against herbivores, and its expression appears to be constrained by both evolutionary history and environmental factors. © 2014 Springer Science+Business Media Dordrecht. |
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Department of Biology, University of Florida, Gainesville, FL, 32611, United States |
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13850237 (Issn) |
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Export Date: 24 February 2014; Source: Scopus; Coden: Plecf; Language of Original Document: English; Correspondence Address: Lamarre, G. P. A.; Université Antilles Guyane, UMR Ecologie des Forêts de Guyane, 97310 Kourou, French Guiana; email: greglamarre973@gmail.com; Funding Details: DEB-0743103/0743800, NSF, National Science Foundation |
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EcoFoG @ webmaster @ |
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530 |
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Lamarre, G.P.A.; Mendoza, I.; Rougerie, R.; Decaëns, T.; Herault, B.; Bénéluz, F. |
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Title |
Stay Out (Almost) All Night: Contrasting Responses in Flight Activity Among Tropical Moth Assemblages |
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Journal Article |
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2015 |
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Neotropical Entomology |
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Neotropical Entomology |
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44 |
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2 |
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109-115 |
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Behavior; diel activity; light trap; monitoring; moth; tropical forest |
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Variations in diel activity among hyperdiverse tropical communities of moths, despite representing a key component of niche partitioning between species, have barely been studied so far. Using light trapping from dawn to sunset over a 1-year period in French Guiana, we investigated these variations within and between two families of moths (Sphingidae and Saturniidae). Our results revealed contrasting patterns in flight activity at night between Sphingidae and Saturniidae. Sphingidae reached their peak in species richness and abundance between 7:00 and 8:00 p.m., followed by a decrease around 11:00 p.m. to midnight, whereas Saturniidae were continuously present throughout the night, with a peak around midnight. In addition, we found changes in diel activity among some of the most common genera in each family, highlighting distinct behavioral, physiological, and functional traits among taxa. Given differences in flight activity at different taxonomic levels, it is strongly recommended to monitor by light trapping throughout the night to effectively sample saturniid and sphingid assemblages, even though the activity of Sphingidae sharply declines after midnight. These results improve the general natural history information of tropical moths and reinforce the need of further research on the ecological and taxonomic consequences of differences in diel activity. © 2015, Sociedade Entomológica do Brasil. |
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Centre d’Ecologie Fonctionnelle et Evolutive, UMR 5175 CNRSMontpellier Cedex 5, France |
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Export Date: 9 April 2015 |
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EcoFoG @ webmaster @ |
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592 |
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