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Legeay, J.; Husson, C.; Boudier, B.; Louisanna, E.; Baraloto, C.; Schimann, H.; Marcais, B.; Buée, M. |
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Title  |
Surprising low diversity of the plant pathogen Phytophthora in Amazonian forests |
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Journal Article |
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Year |
2020 |
Publication |
Environmental Microbiology |
Abbreviated Journal |
Environ. Microbiol. |
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22 |
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12 |
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5019-5032 |
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The genus Phytophthora represents a group of plant pathogens with broad global distribution. The majority of them cause the collar and root-rot of diverse plant species. Little is known about Phytophthora communities in forest ecosystems, especially in the Neotropical forests where natural enemies could maintain the huge plant diversity via negative density dependence. We characterized the diversity of soil-borne Phytophthora communities in the North French Guiana rainforest and investigated how they are structured by host identity and environmental factors. In this little-explored habitat, 250 soil cores were sampled from 10 plots hosting 10 different plant families across three forest environments (Terra Firme, Seasonally Flooded and White Sand). Phytophthora diversity was studied using a baiting approach and metabarcoding (High-Throughput Sequencing) on environmental DNA extracted from both soil samples and baiting-leaves. These three approaches revealed very similar communities, characterized by an unexpected low diversity of Phytophthora species, with the dominance of two cryptic species close to Phytophthora heveae. As expected, the Phytophthora community composition of the French Guiana rainforest was significantly impacted by the host plant family and environment. However, these plant pathogen communities are very small and are dominated by generalist species, questioning their potential roles as drivers of plant diversity in these Amazonian forests. © 2020 Society for Applied Microbiology and John Wiley & Sons Ltd. |
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International Center for Tropical Botany, Department of Biological Sciences, Florida International University, Miami, FL 33199, United States |
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Blackwell Publishing Ltd |
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14622912 (Issn) |
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EcoFoG @ webmaster @ |
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940 |
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Sist, P.; Picard, N.; Gourlet-Fleury, S. |
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Title |
Sustainable cutting cycle and yields in a lowland mixed dipterocarp forest of Borneo |
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Journal Article |
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Year |
2003 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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60 |
Issue |
8 |
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803-814 |
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Based on a 6 year monitoring of the dynamics of a mixed dipterocarp forest in East Borneo (1990-1996), we built a matrix model to predict the sustainable cutting cycle in relation with the extraction and damage rates. Plots were ordered according to three main groups of damage and logging intensity. The first group G1 gathered slightly damaged plots with a remaining basal area greater than or equal to80% of the original (mean logging intensity = 6 trees ha(-1)). Plots belonging to G2, had a remaining basal area varying between 70 and 79% of the original one (mean logging intensity = 8 trees ha(-1)). Finally, G3 gathers highly damaged plots with a remaining basal area < 70% of the original one and a high logging intensity (mean = 14 trees ha(-1)). The mean sustainable cutting cycles predicted in the three groups were significantly different and equal 27, 41 and 89 years in G1, G2 and G3 respectively. However, the respective mean annual extracted volumes were similar: 1.6, 1.8 and 1.4 m(3) ha(-1) year(-1), respectively in G1, G2 and G3. The model suggests that a 40 year cycle, extracting 8 trees ha(-1) (60 m(3) ha(-1)) and an annual volume of 1.5 m(3) ha(-1) year(-1) is the best option to preserve ecological integrity of the forest, to ensure yield sustainability and, according to existing cost analysis, economic profitability. This result is also consistent with other studies which already demonstrated that logging damage reduction using RIL techniques could be only significant with a moderate felling intensity not exceeding 8 trees ha(-1). This felling intensity threshold can be easily achieved by applying simple harvesting rules. |
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1286-4560 |
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WOS:000221039000007 |
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EcoFoG @ webmaster @ |
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310 |
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Odonne, G.; Bourdy, G.; Castillo, D.; Estevez, Y.; Lancha-Tangoa, A.; Alban-Castillo, J.; Deharo, E.; Rojas, R.; Stien, D.; Sauvain, M. |
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Title |
Ta'ta', Huayani: Perception of leishmaniasis and evaluation of medicinal plants used by the Chayahuita in Peru. Part II |
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Journal Article |
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Year |
2009 |
Publication |
Journal of Ethnopharmacology |
Abbreviated Journal |
J. Ethnopharmacol. |
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126 |
Issue |
1 |
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149-158 |
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Leishmaniasis; Medicinal plants; Traditional medicine; Chayahuita; Peru |
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Aim of the study v: A knowledge attitude and practice study centred on leishmaniasis and its treatment was performed among the Chayahuita, in Amazonian Peruvian ethnic group living in ail endemic area. This study documents traditional Chayahuita plant's use and disease concepts. Also, activity of some medicinal Plants Used by the Chayahuita is highlighted and discussed. Materials and methods: Ninety-three Chayahuita people were interviewed, following a semi-structured questionnaire focussed oil disease knowledge and perception, personal attitude and healing practices. Simultaneously, a collection of plants was performed in different ecotopes, in order to make ail extensive inventory of the pharmacopoeia. Results: For the Chayahuita, cutaneous (CL) and muco-cutaneous leishmaniasis (MCL) are considered as diseases of their own, with specific names, aetiologics, mode of transmission. Regarding CL, Chayahuita people consider that the humid characteristic of the Skill ulcer is a discriminative fact orienting the diagnostic for Ta'ta' (leishmaniasis). Forty-six different species were designated useful against LC and /or MCL (29 species by means of the questionnaire and 27 species when collecting in different ecotopes). Thirty-seven extracts corresponding to 31 Species used medicinally were screened in vitro against Leishmania amazonensis axenic amastigotes, assessing their viability by the reduction Of tetrazolium salt (MTT). Six species displayed a good activity (10 μg/ml < IC50 < 20 μg/ml): all undetermined hemi-epiphytic Clusiaceae. Cybianthus anthuriophyllus Pipoly (Myrsinaceae), two Piper, Piper sanguineispicum Trel., and Piper loretoanum Trel. (Piperaceae), Desmodium axillare Sw. DC. (Fabaceae), and Clibadium sylvestre (Aubl.) Baill (Asteraceae). Conclusion: Perception of leishmaniasis, attitude. treatments and diet prohibitions still largely reflects traditional Chayahuita cosmovision, even if some tentative of bio-medical re-interpretation is arising. (C) 2009 Elsevier Ireland Ltd. All rights reserved. |
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[Odonne, G.; Bourdy, G.; Estevez, Y.; Deharo, E.; Sauvain, M.] Univ Toulouse, UPS, UMR 152, Lab Pharmacochim Subst Nat & Pharmacophores Redox, F-31062 Toulouse 9, France, Email: Genevieve.bourdy@ird.fr |
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ELSEVIER IRELAND LTD |
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0378-8741 |
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ISI:000271790800020 |
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EcoFoG @ eric.marcon @ |
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95 |
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Cecilia Blundo ; Julieta Carilla ; Ricardo Grau ; Agustina Malizia ; Lucio Malizia ; Oriana Osinaga-Acosta ; Michael Bird ; Bradford, Matt ; Damien Catchpole ; Andrew Ford ; Andrew Graham ; David Hilbert ; Jeanette Kemp ; Susan Laurance ; William Laurance ; Francoise Yoko Ishida ; Andrew Marshall ; Catherine Waite ; Hannsjoerg Woell ; Jean-Francois Bastin ; Marijn Bauters ; Hans Beeckman ; Pfascal Boeckx ; Jan Bogaert ; Charles De Canniere ; Thales de Haulleville ; Jean-Louis Doucet ; Olivier Hardy ; Wannes Hubau ; Elizabeth Kearsley ; Hans Verbeeck ; Jason Vleminckx ; Steven W. Brewer ; Alfredo Alarc´on ; Alejandro Araujo-Murakami ; Eric Arets ; Luzmila Arroyo ; Ezequiel Chavez ; Todd Fredericksen ; Ren´e Guill´en Villaroel ; Gloria Gutierrez Sibauty ; Timothy Killeen ; Juan Carlos Licona ; John Lleigue ; Casimiro Mendoza ; Samaria Murakami ; Alexander Parada Gutierrez ; Guido Pardo ; Marielos Pena-Claros ; Lourens Poorter ; Marisol Toledo ; Jeanneth Villalobos Cayo ; Laura Jessica Viscarra ; Vincent Vos ; Jorge Ahumada ; Everton Almeida ; Jarcilene Almeida aq, Edmar Almeida de Oliveira ; Wesley Alves da Cruz ; Atila Alves de Oliveira ; Fabrício Alvim Carvalho ; Flavio Amorim Obermuller ; Ana Andrade ; Fernanda Antunes Carvalho ; Simone Aparecida Vieira ; Ana Carla Aquino ; Luiz Aragao ; Ana Claudia Araújo ; Marco Antonio Assis ; Jose Ataliba Mantelli Aboin Gomes ; Fabrício Baccaro ; Plínio Barbosa de Camargo ; Paulo Barni ; Jorcely Barroso ; Luis Carlos Bernacci ; Kauane Bordin ; Marcelo Brilhante de Medeiros ; Igor Broggio ; Jose Luís Camargo ; Domingos Cardoso ; Maria Antonia Carniello ; Andre Luis Casarin Rochelle ; Carolina Castilho ; Antonio Alberto Jorge Farias Castro ; Wendeson Castro ; Sabina Cerruto Ribeiro ; Flavia Costa ; Rodrigo Costa de Oliveira ; Italo Coutinho ; John Cunha ; Lola da Costa ; Lucia da Costa Ferreira ; Richarlly da Costa Silva ; Marta da Graça Zacarias Simbine ; Vitor de Andrade Kamimura ; Haroldo Cavalcante de Lima ; Lia de Oliveira Melo ; Luciano de Queiroz ; Jose Romualdo de Sousa Lima ; Mario do Espírito Santo ; Tomas Domingues ; Nayane Cristina dos Santos Prestes ; Steffan Eduardo Silva Carneiro ; Fernando Elias ; Gabriel Eliseu ; Thaise Emilio ; Camila Laís Farrapo ; Letícia Fernandes ; Gustavo Ferreira ; Joice Ferreira ; Leandro Ferreira ; Socorro Ferreira ; Marcelo Fragomeni Simon ; Maria Aparecida Freitas ; Queila S. García ; Angelo Gilberto Manzatto ; Paulo Graça ; Frederico Guilherme ; Eduardo Hase ; Niro Higuchi ; Mariana Iguatemy ; Reinaldo Imbrozio Barbosa ; Margarita Jaramillo |
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Title |
Taking the pulse of Earth’s tropical forests using networks of highly distributed plots |
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Journal Article |
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2021 |
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Biological Conservation |
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260 |
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parcelle, forêt tropicale, biodiversité forestière, Écosystème forestier, Écologie forestière, Changement de couvert végétal, Couvert forestier |
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Tropical forests are the most diverse and productive ecosystems on Earth. While better understanding of these forests is critical for our collective future, until quite recently efforts to measure and monitor them have been largely disconnected. Networking is essential to discover the answers to questions that transcend borders and the horizons of funding agencies. Here we show how a global community is responding to the challenges of tropical ecosystem research with diverse teams measuring forests tree-by-tree in thousands of long-term plots. We review the major scientific discoveries of this work and show how this process is changing tropical forest science. Our core approach involves linking long-term grassroots initiatives with standardized protocols and data management to generate robust scaled-up results. By connecting tropical researchers and elevating their status, our Social Research Network model recognises the key role of the data originator in scientific discovery. Conceived in 1999 with RAINFOR (South America), our permanent plot networks have been adapted to Africa (AfriTRON) and Southeast Asia (T-FORCES) and widely emulated worldwide. Now these multiple initiatives are integrated via ForestPlots.net cyber-infrastructure, linking colleagues from 54 countries across 24 plot networks. Collectively these are transforming understanding of tropical forests and their biospheric role. Together we have discovered how, where and why forest carbon and biodiversity are responding to climate change, and how they feedback on it. This long-term pan-tropical collaboration has revealed a large long-term carbon sink and its trends, as well as making clear which drivers are most important, which forest processes are affected, where they are changing, what the lags are, and the likely future responses of tropical forests as the climate continues to change. By leveraging a remarkably old technology, plot networks are sparking a very modern revolution in tropical forest science. In the future, humanity can benefit greatly by nurturing the grassroots communities now collectively capable of generating unique, long-term understanding of Earth's most precious forests. |
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Elsevier |
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EcoFoG @ webmaster @ |
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1021 |
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Duplais, C.; Estevez, Y. |
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Tandem Biocatalysis Unlocks the Challenging de Novo Production of Plant Natural Products |
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Journal Article |
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2017 |
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ChemBioChem |
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ChemBioChem |
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18 |
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22 |
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2192-2195 |
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alkaloids; biosynthesis; enzyme catalysis; protein engineering; terpenes |
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Intimate partnership: Knowledge of the biocatalytic cascades in different cellular compartments is limited, but deciphering these systems in nature can be used to inspire synthetic strategies. Two studies report new insights into the biosynthesis of alkaloids and sesterterpenoids in plants. This highlight presents these novel biotransformations to illustrate how tandem biocatalysis can impact the future of natural product production. |
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1439-7633 |
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EcoFoG @ webmaster @ |
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780 |
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Fu, T.; Touboul, D.; Della-Negra, S.; Houel, E.; Amusant, N.; Duplais, C.; Fisher, G.L.; Brunelle, A. |
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Tandem Mass Spectrometry Imaging and in Situ Characterization of Bioactive Wood Metabolites in Amazonian Tree Species Sextonia rubra |
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Journal Article |
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2018 |
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Analytical Chemistry |
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Anal. Chem. |
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90 |
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12 |
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7535-7543 |
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Driven by a necessity for confident molecular identification at high spatial resolution, a new time-of-flight secondary ion mass spectrometry (TOF-SIMS) tandem mass spectrometry (tandem MS) imaging instrument has been recently developed. In this paper, the superior MS/MS spectrometry and imaging capability of this new tool is shown for natural product study. For the first time, via in situ analysis of the bioactive metabolites rubrynolide and rubrenolide in Amazonian tree species Sextonia rubra (Lauraceae), we were able both to analyze and to image by tandem MS the molecular products of natural biosynthesis. Despite the low abundance of the metabolites in the wood sample(s), efficient MS/MS analysis of these γ-lactone compounds was achieved, providing high confidence in the identification and localization. In addition, tandem MS imaging minimized the mass interferences and revealed specific localization of these metabolites primarily in the ray parenchyma cells but also in certain oil cells and, further, revealed the presence of previously unidentified γ-lactone, paving the way for future studies in biosynthesis. |
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American Chemical Society |
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0003-2700 |
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doi: 10.1021/acs.analchem.8b01157 |
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EcoFoG @ webmaster @ |
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834 |
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Talaga, S.; Dezerald, O.; Carteron, A.; Petitclerc, F.; Leroy, C.; Céréghino, R.; Dejean, A. |
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Tank bromeliads as natural microcosms: A facultative association with ants influences the aquatic invertebrate community structure |
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2015 |
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Comptes Rendus – Biologies |
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Comptes Rendus – Biologies |
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338 |
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10 |
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696-700 |
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Aechmea; Ant-bromeliad associations; Aquatic communities; Odontomachus; Phytotelm |
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Many tank bromeliads have facultative relationships with ants as is the case in French Guiana between Aechmea aquilega (Salib.) Griseb. and the trap-jaw ant, Odontomachus haematodus Linnaeus. Using a redundancy analysis, we determined that the presence of O. haematodus colonies is accompanied by a greater quantity of fine particulate organic matter in the water likely due to their wastes. This increase in nutrient availability is significantly correlated with an increase in the abundance of some detritivorous taxa, suggesting a positive bottom-up influence on the aquatic macroinvertebrate communities living in the A. aquilega wells. On the other hand, the abundance of top predators is negatively affected by a lower number of available wells due to ant constructions for nesting, releasing a top-down pressure that could also favor lower trophic levels. © 2015 Académie des sciences. |
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CNRS, Ecolab (UMR-CNRS 5245), 118, route de Narbonne, Toulouse, France |
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Export Date: 2 October 2015 |
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EcoFoG @ webmaster @ |
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627 |
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Dézerald, O.; Leroy, C.; Corbara, B.; Dejean, A.; Talaga, S.; Céréghino, R. |
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Tank bromeliads sustain high secondary production in neotropical forests |
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Journal Article |
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2018 |
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Aquatic Sciences |
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80 |
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14 |
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Biomass turnover; Epiphytes; Food webs; Functional traits; Invertebrates; Rainforests |
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In neotropical landscapes, a substantial fraction of the still waters available is found within tank bromeliads, plants which hold a few milliliters to several litres of rainwater within their leaf axils. The bromeliad ecosystem is integrated into the functioning of rainforest environments, but no study has ever estimated the secondary production, nor the biomass turnover rates of bromeliad macroinvertebrates in relation to other functional traits. We estimated secondary production at invertebrate population to metacommunity level in bromeliads of French Guiana. Coleoptera, Diptera and Crustacea with traits that confer resistance to drought had lower biomass turnover, longer generation times, and slower individual growth than species without particular resistance traits, suggesting convergent life history strategies in phylogenetically distant species. Detritivores and predators accounted for 87% and 13% of the overall annual production, respectively, but had similar production to biomass ratios. An average bromeliad sustained a production of 23.93 g dry mass m−2 year−1, a value which exceeds the medians of 5.0–14.8 g DM m−2 year−1 for lakes and rivers worldwide. Extrapolations to the total water volumes held by bromeliads at our field site yielded secondary production estimates of 226.8 ± 32.5 g DM ha−1 year−1. We conclude that the ecological role of tank bromeliads in neotropical rainforests may be as important as that of other freshwater ecosystems. © 2018, Springer International Publishing AG, part of Springer Nature. |
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Université de Guyane, UMR Écologie des Forêts de Guyane (AgroParisTech, CIRAD, CNRS, INRA, Université des Antilles), Campus Agronomique, BP 316, Kourou cedex, France |
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Export Date: 29 January 2018 |
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EcoFoG @ webmaster @ |
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790 |
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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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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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Abstract |
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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