| Records |
| Author |
Schimann, H.; Bach, C.; Lengelle, J.; Louisanna, E.; Barantal, S.; Murat, C.; Buée, M. |
Title  |
Diversity and Structure of Fungal Communities in Neotropical Rainforest Soils: The Effect of Host Recurrence |
Type |
Journal Article |
| Year |
2017 |
Publication |
Microbial Ecology |
Abbreviated Journal |
Microbial Ecology |
| Volume |
73 |
Issue |
2 |
Pages |
310-320 |
| Keywords |
Amazonian forest; Fungal communities; Host recurrence; Litter; Second-generation sequencing; Soil |
| Abstract |
The patterns of the distribution of fungal species and their potential interactions with trees remain understudied in Neotropical rainforests, which harbor more than 16,000 tree species, mostly dominated by endomycorrhizal trees. Our hypothesis was that tree species shape the non-mycorrhizal fungal assemblages in soil and litter and that the diversity of fungal communities in these two compartments is partly dependent on the coverage of trees in the Neotropical rainforest. In French Guiana, a long-term plantation and a natural forest were selected to test this hypothesis. Fungal ITS1 regions were sequenced from soil and litter samples from within the vicinity of tree species. A broad range of fungal taxa was found, with 42 orders and 14 classes. Significant spatial heterogeneity in the fungal communities was found without strong variation in the species richness and evenness among the tree plots. However, tree species shaped the fungal assemblages in the soil and litter, explaining up to 18 % of the variation among the communities in the natural forest. These results demonstrate that vegetation cover has an important effect on the structure of fungal assemblages inhabiting the soil and litter in Amazonian forests, illustrating the relative impact of deterministic processes on fungal community structures in these highly diverse ecosystems. © 2016, Springer Science+Business Media New York. |
| Address |
Equipe Environnement et Microbiologie, Institut Pluridisciplinaire de Recherche en Environnement et Matériaux, Université de Pau et Pays de l’Adour, Pau, France |
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Export Date: 19 February 2017 |
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EcoFoG @ webmaster @ |
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734 |
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Corbara, B.; Carpenter, J.M.; Cereghino, R.; Leponce, M.; Gibernau, M.; Dejean, A. |
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Diversity and nest site selection of social wasps along Guianese forest edges: assessing the influence of arboreal ants |
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Journal Article |
| Year |
2009 |
Publication |
Comptes Rendus Biologies |
Abbreviated Journal |
C. R. Biol. |
| Volume |
332 |
Issue |
5 |
Pages |
470-479 |
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Polistinae; Diversity; Nest site selection; Ant-wasp-plant interactions; French Guiana |
| Abstract |
monitored), and estimate that we recorded up to 73% of the local social wasp fauna. This baseline study was complemented by a long-term survey of the same area and the examination of isolated trees (permitting us to record two additional species, resulting in a total of 63 wasp species). Our results form a continuum from species avoiding nesting on any plant (6.5% of the wasp species) to species nesting on plants but avoiding those sheltering ant nests (82%), to, finally, wasps nesting in association with arboreal ants known to divert army ant raids (11.5%). Consequently, this study documents that most wasp species select plants possibly repulsive to arboreal ants, while associations with arboreal ants, although confirmed here, have been overrepresented in the literature. To cite this article: B. Corbara et al., C. R. Biologies 332 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved. |
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[Dejean, Alain] CNRS Guyane, UPS 2561, F-97300 Cayenne, France, Email: bruno.corbara@univ-bpclermont.fr |
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ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
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1631-0691 |
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ISI:000266021400007 |
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EcoFoG @ eric.marcon @ |
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113 |
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Roy, M.; Schimann, H.; Braga-Neto, R.; Da Silva, R.A.E.; Duque, J.; Frame, D.; Wartchow, F.; Neves, M.A. |
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Diversity and Distribution of Ectomycorrhizal Fungi from Amazonian Lowland White-sand Forests in Brazil and French Guiana |
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Journal Article |
| Year |
2016 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
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48 |
Issue |
1 |
Pages |
90-100 |
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campina; campinarana; Amanitaceae; Amanitaceae; Boletaceae; Boletaceae; Campina; Campinarana; Herbarium; Herbário; Russulaceae; Russulaceae |
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White-sand forests are thought to host many ectomycorrhizal fungi, as demonstrated by the numerous fruiting body collections made by Rolf Singer in the lower Rio Negro in the late 1970s. Despite recognition of the importance of ectomycorrhizal fungi in white-sand forests, there has not yet been a systematic examination of diversity and taxonomic composition across white-sand forests, or more widely across lowland Amazonian forests. In an effort to broaden our view of ectomycorrhizal fungal diversity and distribution on white-sand forests, we collected ectomycorrhizal fruiting bodies in 10 plots of white-sand forests in Brazil and French Guiana between 2012 and 2014. We collected 221 specimens and 62 morphospecies, from the 10 plots, confirming that all studied white-sand forests host ectomycorrhizal fungi. Additionally, we searched for taxa associated with white sands among specimens deposited in Brazilian herbaria. We report 1006 unique ectomycorrhizal specimen records in 18 Brazilian herbaria, of which 137 specimens and 64 species are reported from white-sand forests, mainly in the state of Amazonas, Brazil. Russulaceae and Amanitaceae were frequent in all habitats, and Cortinarius were more frequent on white sands. Our results highlight the high diversity and heterogeneity of ectomycorrhizal communities on white-sand forests, and the wide distribution of ectomycorrhizal fungi throughout Brazil, irrespective of soil type. © 2016 The Association for Tropical Biology and Conservation. |
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Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, João Pessoa, PB, Brazil |
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Cited By :2; Export Date: 12 February 2016 |
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EcoFoG @ webmaster @ |
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658 |
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Sullivan, M.J.P.; Talbot, J.; Lewis, S.L.; Phillips, O.L.; Qie, L.; Begne, S.K.; Chave, J.; Cuni-Sanchez, A.; Hubau, W.; Lopez-Gonzalez, G.; Miles, L.; Monteagudo-Mendoza, A.; Sonké, B.; Sunderland, T.; Ter Steege, H.; White, L.J.T.; Affum-Baffoe, K.; Aiba, S.-I.; De Almeida, E.C.; De Oliveira, E.A.; Alvarez-Loayza, P.; Dávila, E.Á.; Andrade, A.; Aragão, L.E.O.C.; Ashton, P.; Aymard, G.A.; Baker, T.R.; Balinga, M.; Banin, L.F.; Baraloto, C.; Bastin, J.-F.; Berry, N.; Bogaert, J.; Bonal, D.; Bongers, F.; Brienen, R.; Camargo, J.L.C.; Cerón, C.; Moscoso, V.C.; Chezeaux, E.; Clark, C.J.; Pacheco, Á.C.; Comiskey, J.A.; Valverde, F.C.; Coronado, E.N.H.; Dargie, G.; Davies, S.J.; De Canniere, C.; Djuikouo, M.N.; Doucet, J.-L.; Erwin, T.L.; Espejo, J.S.; Ewango, C.E.N.; Fauset, S.; Feldpausch, T.R.; Herrera, R.; Gilpin, M.; Gloor, E.; Hall, J.S.; Harris, D.J.; Hart, T.B.; Kartawinata, K.; Kho, L.K.; Kitayama, K.; Laurance, S.G.W.; Laurance, W.F.; Leal, M.E.; Lovejoy, T.; Lovett, J.C.; Lukasu, F.M.; Makana, J.-R.; Malhi, Y.; Maracahipes, L.; Marimon, B.S.; Junior, B.H.M.; Marshall, A.R.; Morandi, P.S.; Mukendi, J.T.; Mukinzi, J.; Nilus, R.; Vargas, P.N.; Camacho, N.C.P.; Pardo, G.; Peña-Claros, M.; Petronelli, P.; Pickavance, G.C.; Poulsen, A.D.; Poulsen, J.R.; Primack, R.B.; Priyadi, H.; Quesada, C.A.; Reitsma, J.; Réjou-Méchain, M.; Restrepo, Z.; Rutishauser, E.; Salim, K.A.; Salomão, R.P.; Samsoedin, I.; Sheil, D.; Sierra, R.; Silveira, M.; Slik, J.W.F.; Steel, L.; Taedoumg, H.; Tan, S.; Terborgh, J.W.; Thomas, S.C.; Toledo, M.; Umunay, P.M.; Gamarra, L.V.; Vieira, I.C.G.; Vos, V.A.; Wang, O.; Willcock, S.; Zemagho, L. |
| Title |
Diversity and carbon storage across the tropical forest biome |
Type |
Journal Article |
| Year |
2017 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
| Volume |
7 |
Issue |
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Pages |
39102 |
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Tropical forests are global centres of biodiversity and carbon storage. Many tropical countries aspire to protect forest to fulfil biodiversity and climate mitigation policy targets, but the conservation strategies needed to achieve these two functions depend critically on the tropical forest tree diversity-carbon storage relationship. Assessing this relationship is challenging due to the scarcity of inventories where carbon stocks in aboveground biomass and species identifications have been simultaneously and robustly quantified. Here, we compile a unique pan-Tropical dataset of 360 plots located in structurally intact old-growth closed-canopy forest, surveyed using standardised methods, allowing a multi-scale evaluation of diversity-carbon relationships in tropical forests. Diversity-carbon relationships among all plots at 1 ha scale across the tropics are absent, and within continents are either weak (Asia) or absent (Amazonia, Africa). A weak positive relationship is detectable within 1 ha plots, indicating that diversity effects in tropical forests may be scale dependent. The absence of clear diversity-carbon relationships at scales relevant to conservation planning means that carbon-centred conservation strategies will inevitably miss many high diversity ecosystems. As tropical forests can have any combination of tree diversity and carbon stocks both require explicit consideration when optimising policies to manage tropical carbon and biodiversity. © The Author(s) 2017. |
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School of Environment, Natural Resources and Geography, Bangor University, Bangor, United Kingdom |
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Export Date: 3 February 2017 |
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EcoFoG @ webmaster @ |
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725 |
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Diatta, Bétémondji Désiré ; Niass, Ousmane ; Diouf, Massamba ; Guéye, Mathieu ; Houel, Emeline ; Boetsch, Gilles |
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Diversité et composition phytochimique des bâtonnets frotte-dents (cure-dents) proposés chez les Peul de la commune de Tessékéré (Ferlo Nord, Sénégal) |
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Journal Article |
| Year |
2021 |
Publication |
Journal of Applied Biosciences |
Abbreviated Journal |
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158 |
Issue |
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Pages |
16267-16281 |
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Objectifs : Le but de cette étude était de déterminer la composition phytochimique et la teneur en grandes classes chimiques des tiges les plus utilisées comme bâtonnets frotte-dents chez les peul de Widou Thiengoli au Nord Ferlo (Sénégal). Méthodes et résultats : Des entretiens ouverts semi structurés ont permis de recueillir les plantes les plus utilisées. L’indice de fidélité renseigne sur la convergence des usages quant à l’emploi des plantes comme bâtonnets frotte-dent comparé aux autres pratiques cosmétiques. L’étude de la composition phytochimique des tiges a ciblé 8 classes chimiques. Les tanins et les saponines sont très fréquents ; les terpénoïdes et les leuco-anthocyanines presque inexistants. Un dosage des flavonoïdes, alcaloïdes et polyphénols, réalisé chez des extraits aqueux, a porté sur 12 plantes. Les meilleures teneurs en polyphénols et alcaloïdes sont recueillies chez Anogeissus leiocarpa, et la meilleure en flavonoïdes chez Commiphora africana. Conclusion et applicabilité des résultats : Ces résultats permettent de sélectionner à travers la composition phytochimique des plantes, les espèces présentant de potentielles activités antimicrobiennes, car renfermant des composés phytochimique doués de fonctions germicides, au- delà de la fonction mécanique connue des bâtonnets dans l’élimination de la plaque dentaire. |
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Elewa |
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1997-5902 |
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no |
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EcoFoG @ webmaster @ |
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1053 |
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Mirabel, A.; Hérault, B.; Marcon, E. |
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Diverging taxonomic and functional trajectories following disturbance in a Neotropical forest |
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Journal Article |
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2020 |
Publication |
Science of The Total Environment |
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720 |
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137397 |
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Community ecology; Disturbance trajectories; Intermediate disturbance hypothesis; Mid-term resilience; Neotropical forests; Taxonomic and functional biodiversity |
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In the current global change context, it is urgent to anticipate the fate of tropical forests. This means understanding tree community response to disturbance and the underlying processes. In that respect, we aim here to clarify taxonomic and functional post-disturbance trajectories, and determine the scope of the Intermediate Disturbance Hypothesis (IDH) that remains debated in tropical forests. We analyzed community trajectories following a disturbance gradient from 10 to 60% of above-ground biomass loss in a Neotropical forest over 30 years. We considered trajectories along time of community taxonomic and functional trajectories in terms of richness, evenness, composition, and redundancy. We based on the annual botanical inventories of 75 ha of a Neotropical forest and on large trait datasets comprising seven leaf, stem, and life-history traits. We identified a decoupling between taxonomic composition, differing among communities, and functional composition, similar among communities and convergent in the functional space. The taxonomic diversity followed humped-shaped trajectories along time after disturbance depending on the initial disturbance intensity, which validated the IDH (Intermediate Disturbance Hypothesis). The functional diversity trajectories, however, were homogeneous among plots and dismissed the IDH. We explained this decoupling by the variations in community functional redundancy that mitigated the functional impact of disturbance. Although consistent, the recovery of community composition, diversity, and redundancy remained divergent from the initial state after 30 years. These results acknowledged the need of decades-long cycles without disturbance to ensure community complete recovery. |
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0048-9697 |
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EcoFoG @ webmaster @ |
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920 |
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Nasr, H.; Domenach, A.M.; Ghorbel, M.H.; Benson, D.R. |
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Divergence in symbiotic interactions between same genotypic PCR-RFLP Frankia strains and different Casuarinaceae species under natural conditions |
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Journal Article |
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2007 |
Publication |
Physiologia Plantarum |
Abbreviated Journal |
Physiol. Plant. |
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130 |
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3 |
Pages |
400-408 |
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The symbiotic interactions between Frankia strains and their associated plants from the Casuarinaceae under controlled conditions are well documented but little is known about these interactions under natural conditions. We explored the symbiotic interactions between eight genotypically characterized Frankia strains and five Casuarinaceae species in long-term field trials. Characterization of strains was performed using the polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) for the nifD-nifK intergenic transcribed spacer (ITS) and 16S-23S ITS. Assessments of the symbiotic interactions were based on nodulation patterns using nodule dry weight and viability, and on actual N-2 fixation using the delta N-15 method. The PCR-RFLP patterns showed that the analyzed strains belonged to the same genotypic group (CeD group), regardless of the host species and environment of origin. The nodule viability index is introduced as a new tool to measure the viability of perennial nodules and to predict their effectiveness. The host Casuarinaceae species was a key factor influencing both the actual N-2-fixing activity of the associated Frankia strain and the viability of nodules within a location. This is the first study providing information on the symbiotic interactions between genotypically characterized Frankia strains and actinorhizal plants under natural conditions. The results revealed a way to improve a long-term management of the Casuarinaceae symbiosis. |
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Univ Connecticut, Dept Mol & Cell Biol, Storrs, CT 06279 USA, Email: david.benson@uconn.edu |
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BLACKWELL PUBLISHING |
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0031-9317 |
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ISI:000247206100010 |
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EcoFoG @ eric.marcon @ |
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161 |
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Guitet, S.; Sabatier, D.; Brunaux, O.; Couteron, P.; Denis, T.; Freycon, V.; Gonzalez, S.; Hérault, B.; Jaouen, G.; Molino, J.-F.; Pélissier, R.; Richard-Hansen, C.; Vincent, G. |
| Title |
Disturbance Regimes Drive the Diversity of Regional Floristic Pools Across Guianan Rainforest Landscapes |
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Journal Article |
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2018 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
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8 |
Issue |
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Pages |
3872 |
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Disturbances control rainforest dynamics, and, according to the intermediate disturbance hypothesis (IDH), disturbance regime is a key driver of local diversity. Variations in disturbance regimes and their consequences on regional diversity at broad spatiotemporal scales are still poorly understood. Using multidisciplinary large-scale inventories and LiDAR acquisitions, we developed a robust indicator of disturbance regimes based on the frequency of a few early successional and widely distributed pioneer species. We demonstrate at the landscape scale that tree-species diversity and disturbance regimes vary with climate and relief. Significant relationships between the disturbance indicator, tree-species diversity and soil phosphorus content agree with the hypothesis that rainforest diversity is controlled both by disturbance regimes and long-term ecosystem stability. These effects explain the broad-scale patterns of floristic diversity observed between landscapes. In fact, species-rich forests in highlands, which have benefited from long-term stability combined with a moderate and regular regime of local disturbances, contrast with less diversified forests on recently shaped lowlands, which have undergone more recent changes and irregular dynamics. These results suggest that taking the current disturbance regime into account and including geomorphological stratifications in climate-vegetation models may be an effective way to improve the prediction of changes in species diversity under climate change. © 2018 The Author(s). |
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AgroParisTech, EcoFoG, Kourou, French Guiana |
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Export Date: 21 March 2018 |
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EcoFoG @ webmaster @ |
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798 |
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Scotti-Saintagne, C.; Bodenes, C.; Barreneche, T.; Pot, D.; Plomion, C.; Kremer, A. |
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Distribution of genomic regions differentiating oak species assessed by QTL detection |
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Journal Article |
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2004 |
Publication |
Heredity |
Abbreviated Journal |
Heredity |
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92 |
Issue |
1 |
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20-30 |
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QTL; leaf morphology; repeatability; genetic map; Q. robur |
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Pedunculate oak and sessile oak are two sympatric inter-fertile species that exhibit leaf morphological differences. We aimed to detect quantitative trait loci (QTLs) of these traits in order to locate genomic regions involved in species differentiation. A total of 15 leaf morphological traits were assessed in a mixed forest stand composed of Quercus petraea and Q. robur and in a full-sib pedigree of Q. robur. The progeny of the full-sib family were vegetatively propagated in two successive experiments comprising 174 and 216 sibs, and assessments were made on two leaves collected on each of the 1080 and 1530 cuttings corresponding to the two experiments. Traits that exhibited strong species differences in the mixed stand tended also to have higher repeatability values in the mapping population, thus indicating higher genetic control. A genetic map was constructed for QTL detection. Composite interval mapping with the one QTL model was used for QTL detection. From one to three QTLs were detected for 13 traits. In-depth analysis of the QTLs, controlling the five morphological traits that exhibited the highest interspecific differences in the mixed stand, indicated that they were distributed on six linkage groups, with two clusters comprising QTLs of at least two discriminant traits. These results were reinforced when error 1 for QTL detection was set at 5% at the chromosome level, as up to nine clusters could be identified. In conclusion, traits involved in interspecific differentiation of oaks are under polygenic control and widespread in clusters across the genome. |
| Address |
INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France |
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NATURE PUBLISHING GROUP |
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0018-067X |
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ISI:000187216300005 |
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EcoFoG @ eric.marcon @ |
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267 |
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Coté, G.G.; Gibernau, M. |
| Title |
Distribution of calcium oxalate crystals in floral organs of araceae in relation to pollination strategy |
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Journal Article |
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2012 |
Publication |
American Journal of Botany |
Abbreviated Journal |
Am. J. Bot. |
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99 |
Issue |
7 |
Pages |
1231-1242 |
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Araceae; Beetles; Calcium oxalate; Crystal; Defense; Flowers; Herbivory; Pollination |
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Premise of the study: Many flowers are pollinated by potentially hungry insects, yet flowers also contain gametes and embryos which must be protected from predation. Microscopic calcium oxalate crystals in plant tissues have been proposed to protect against herbivory. Aroids, which have an unusual diversity of such crystals, also exhibit diverse pollination strategies. Many species have pollinators that do not feed while visiting the flowers, while other species, especially those pollinated by beetles, offer sterile staminodia as food rewards. We examined flowers of 21 aroid species with various pollination strategies to test the hypothesis that crystals protect vital gametes and embryos while allowing consumption of food bribes.Methods: Aroid inflorescences collected from the field or from greenhouse material were sectioned, cleared, and examined by bright field and polarization microscopy.Key results: All species examined, regardless of pollination strategy, arrayed crystals around unshed pollen and ovules. Less vital tissues, such as odoriferous appendages, had few crystals. Staminodia offered as food to beetle pollinators, however, differed greatly between species in their crystal contents. Some had minimal crystals; some had crystals in patterns suggesting they limit beetle feeding; still others had abundant crystals in no obvious pattern.Conclusions: The results are consistent with crystals protecting against insect predation of gametes and embryos. However, the role of crystals in food-bribe staminodia is unclear. They may limit and direct feeding by beetles in some species, while in others they might have no protective role. © 2012 Botanical Society of America. |
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CNRS-Ecolog (UMR 8172), Campus Agronomique BP316, Korou cedex 97379, France |
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Export Date: 10 August 2012; Source: Scopus; Coden: Ajboa; doi: 10.3732/ajb.1100499; Language of Original Document: English; Correspondence Address: Coté, G. G.; Biology Department, Radford University, Radford, VA 24142-6931, United States; email: gcote@radford.edu |
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