A5019406181- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Fern and Epiphyte Biology
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Plant Parasitism and Resistance
- Plant Diversity and Evolution
- Insect and Pesticide Research
- Leaf Properties and Growth Measurement
- Microbial Community Ecology and Physiology
- Mycorrhizal Fungi and Plant Interactions
- Mosquito-borne diseases and control
- Forest ecology and management
- Insect symbiosis and bacterial influences
- Plant Pathogens and Fungal Diseases
- Marine Biology and Ecology Research
- Remote Sensing in Agriculture
- Freshwater macroinvertebrate diversity and ecology
- Plant Water Relations and Carbon Dynamics
- Marine and coastal plant biology
- Peatlands and Wetlands Ecology
- Linguistics and Discourse Analysis
- Land Use and Ecosystem Services
- Lichen and fungal ecology
- Malaria Research and Control
Centre National de la Recherche Scientifique
2015-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2015-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
AgroParisTech
2015-2024
Ecologie des Forêts de Guyane
2015-2024
Université de Montpellier
2016-2024
UMR Botanique et Modélisation de l’Architecture des Plantes et des végétations
2015-2024
Institut Agro Montpellier
2018-2024
Institut de Recherche pour le Développement
2015-2024
Centre de Recherche sur la Biodiversité et l'Environnement
2024
Abstract Changes in global and regional precipitation regimes are among the most pervasive components of climate change. Intensification rainfall cycles, ranging from frequent downpours to severe droughts, could cause widespread, but largely unknown, alterations trophic structure ecosystem function. We conducted multi-site coordinated experiments show how variation quantity evenness modulates 210 natural freshwater microcosms (tank bromeliads) across Central South America (18°N 29°S). The...
Abstract Stoichiometric differences among organisms can affect trophic interactions and rates of nutrient cycling within ecosystems. However, we still know little about either the underlying causes these stoichiometric or consistency across large geographical extents. Here, analyse elemental (carbon, nitrogen, phosphorus) composition 872 aquatic macroinvertebrates (71 species) inhabiting tank bromeliads ( n = 140) from five distantly located sites Central South America to (i) test...
Summary 1. A substantial fraction of the freshwater available in neotropical forests is impounded within rosettes bromeliads that form aquatic islands a terrestrial matrix. The ecosystem functioning known to be influenced by composition contained community but it not clear whether bromeliad food webs remain functionally similar against background variation understorey environment. 2. We considered broad range environmental conditions, including incident light and incoming litter, quantified...
We assessed the occurrence of algae in five species tank-bromeliads found contrasting environmental sites a Neotropical, primary rainforest around Nouragues Research Station, French Guiana. The distributions both algal abundance and biomass were examined based on physical parameters, morphological characteristics bromeliad with regard to structure other aquatic microbial communities held tanks. Algae retrieved all mean densities ranging from ∼102 104 cells/mL. Their was positively correlated...
AimsOne critical challenge for plants is to maintain an adequate nutrient supply under fluctuating environmental conditions. This particularly true epiphytic species that have limited or no access the pedosphere and often live in harsh climates. Bromeliads evolved key innovations such as epiphytism, water-absorbing leaf trichomes, tank habit Crassulacean acid metabolism (CAM) photosynthesis enable them survive various encompass diverse ecological types on different substrates (they can be...
Abstract Functional traits are commonly used in predictive models that link environmental drivers and community structure to ecosystem functioning. A prerequisite is identify robust sets of continuous axes trait variation, understand the ecological evolutionary constraints result functional space occupied by interacting species. Despite their diversity role functioning, little known on invertebrate biotas entire biogeographic regions. We examined strategies underlying realized aquatic...
There is growing recognition that ecosystems may be more impacted by infrequent extreme climatic events than changes in mean conditions. This has led to calls for experiments explore the sensitivity of over broad ranges parameter space. However, because such response surface have so far been limited geographic and biological scope, it not clear if differences between studies reflect location or ecosystem component considered. In this study, we manipulated rainfall entering tank bromeliads...
Tropical rainforests are vital for global biogeochemical cycles and human well-being shelter a tremendous, unique, yet underexplored reservoir of biodiversity. With the increasing pressures they face, including deforestation, biological invasions, climate change, improving methods to monitor their biodiversity is now pressing societal demand. In recent years, amplification sequencing taxonomically-informative DNA fragments from environmental samples (i.e. eDNA) has revolutionised...
Little is known of how linkage patterns between species change along environmental gradients. The small, spatially discrete food webs inhabiting tank-bromeliads provide an excellent opportunity to analyse community diversity and food-web topology (connectance, density, nestedness) in relation key variables (habitat size, detrital resource, incident radiation) predators:prey ratios. We sampled 365 bromeliads a wide range understorey environments French Guiana used gut contents invertebrates...
Summary Ecosystems are being stressed by climate change, but few studies have tested food web responses to changes in precipitation patterns and the consequences ecosystem function. Fewer still considered whether results from one geographic region can be applied other regions, given degree of community change over large biogeographic gradients. We assembled, field site, three types macroinvertebrate communities within water‐filled bromeliads. Two represented webs containing both a fast...
Ant–fungus associations are well known from attine ants, whose nutrition is based on a symbiosis with basidiomycete fungi. Otherwise, only few non-nutritional ant–fungus have been recorded to date. Here we focus one of these involving Allomerus plant-ants that build galleried structures their myrmecophytic hosts in order ambush prey. We show this association not opportunistic because the ants select monophyletic group closely related fungal haplotypes an ascomycete species Chaetothyriales...
Summary 1. Plants often rely on external, mutualistic partners to survive and reproduce in resource‐limited environments or for protection from enemies. Such interactions, including mycorrhizal symbioses ant–plant associations, are widespread play an important role at the ecosystem community levels. In mutualisms, plants may benefit both provided by presence of ants nutrients absorbed insect debris. However, third plant nutrition, particularly ant‐associated fungi, has never before been...
Summary The duration of the dry seasons in south‐eastern Amazonia is expected to increase. Little known how freshwater assemblages respond drought humid rainforests and extent which they resist absence rainfall before collapse system. We manipulated rainshelters over tank‐forming bromeliads (i.e. interlocking leaf axils these plants form wells that collect rainwater) simulate an exceptionally long period (49 days, compared with a 10‐year mean ± SD annual maximum number 17 5.3 days without at...
Summary Tank bromeliads form a conspicuous, yet neglected freshwater habitat in Neotropical forests. Recent studies driven by interests medical entomology, fundamental aspects of bromeliad ecology and experimental research on food webs have, however, prompted increasing interest aquatic ecosystems. As yet, there is nothing the literature about life histories environmental drivers invertebrate population dynamics tank bromeliads. Based fortnightly samples taken over one year, size frequency...
The mosquito family (Diptera: Culicidae) constitutes the most medically important group of arthropods because certain species are vectors human pathogens. In some parts world, diversity is so high that accurate delimitation and/or identification challenging. A DNA-based system for all animals has been proposed, so-called DNA barcoding approach. this study, our objectives were (i) to establish barcode libraries mosquitoes French Guiana based on COI and 16S markers, (ii) compare distance-based...
Abstract Photosynthetic microbes are omnipresent in land and water. While they critically influence primary productivity aquatic systems, their importance terrestrial ecosystems remains largely overlooked. In photoautotrophs occur a variety of habitats, such as sub-surface soils, exposed rocks, bryophytes. Here, we study photosynthetic microbial communities associated with bryophytes from boreal peatland tropical rainforest. We interrogate contribution to bryophyte C uptake identify the main...
• Aechmea mertensii is a tank-bromeliad that roots on ant-gardens initiated by the ants Camponotus femoratus and Pachycondyla goeldii. Its leaves form compartments acting as phytotelmata hold rainwater provide habitats for invertebrates. In this article, we aimed to determine whether association with either C. or P. goeldii influenced vegetative traits of A. mertensii, invertebrate diversity nutrient assimilation leaves. Transmitted light, contents were compared between two ant-gardens....
ou non, émanant des établissements d'enseignement et de recherche français étrangers, laboratoires publics privés.
Epiphytism imposes physiological constraints resulting from the lack of access to nutrient sources available ground-rooted plants. A conspicuous adaptation in response that is phytotelm (plant-held waters) tank-bromeliad species are often nutrient-rich. Associations with terrestrial invertebrates also result higher plant acquisition. Assuming tank-bromeliads rely on reservoir-assisted nutrition, it was hypothesized dual association mutualistic ants and food web provides greater nutritional...