A5038319104- Soil Carbon and Nitrogen Dynamics
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Plant responses to elevated CO2
- Forest Ecology and Biodiversity Studies
- Tree-ring climate responses
- Soil and Water Nutrient Dynamics
- Forest ecology and management
- Peatlands and Wetlands Ecology
- Microbial Community Ecology and Physiology
- Fire effects on ecosystems
- Forest Management and Policy
- Invertebrate Taxonomy and Ecology
- Land Use and Ecosystem Services
- Atmospheric chemistry and aerosols
- Freshwater macroinvertebrate diversity and ecology
- Mycorrhizal Fungi and Plant Interactions
- Geology and Paleoclimatology Research
- Hydrology and Watershed Management Studies
- Conservation, Biodiversity, and Resource Management
- Plant and animal studies
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Plant Parasitism and Resistance
- Mollusks and Parasites Studies
Institut de Recherche pour le Développement
2018-2024
École Pratique des Hautes Études
2015-2024
Université de Montpellier
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Paul-Valéry Montpellier
2014-2024
Centre d'Écologie Fonctionnelle et Évolutive
2015-2024
John Wiley & Sons (United States)
2018
Ecological Society of America
2018
Canadian Nautical Research Society
2013
Lund University
2010
▪ Abstract We explore empirical and theoretical evidence for the functional significance of plant-litter diversity extraordinary high decomposer organisms in process litter decomposition consequences biogeochemical cycles. Potential mechanisms frequently observed litter-diversity effects on mass loss nitrogen dynamics include fungi-driven nutrient transfer among species, inhibition or stimulation microorganisms by specific compounds, positive feedback soil fauna due to greater habitat food...
Whether rising atmospheric carbon dioxide (CO 2 ) concentrations will cause forests to grow faster and store more is an open question. Using free air CO release in combination with a canopy crane, we found immediate sustained enhancement of flux through 35-meter-tall temperate forest trees when exposed elevated . However, there was no overall stimulation stem growth leaf litter production after 4 years. Photosynthetic capacity not reduced, chemistry changes were minor, tree species differed...
Most of the terrestrial net primary production enters decomposer system as dead organic matter, and subsequent recycling C nutrients are key processes for functioning ecosystems delivery ecosystem goods services. Although climatic substrate quality controls reasonably well understood, functional role biodiversity biogeochemical cycles remains elusive. Here we ask how altering litter species diversity affects species-specific decomposition rates whether large litter-feeding soil animals...
Abstract Plant litter decomposition is a key process in terrestrial carbon cycling, yet the relative importance of various control factors remains ambiguous at global scale. A full reciprocal transplant study with 16 species that varied widely traits and originated from four forest sites covering large latitudinal gradient (subarctic to tropics) showed consistent interspecific ranking rates. At scale, variation was driven by small subset (water saturation capacity concentrations magnesium...
Abstract Soil fungi and bacteria are the key players in transformation processing of carbon nutrients terrestrial ecosystems, yet controls on their abundance activity not well understood. Based stoichiometric principles, soil microbial processes expected to be limited by mineral nutrients, which particularly scarce often highly weathered tropical forest soils. Such limitation is directly relevant for fate global element cycles, but its extent nature have never been assessed systematically...
Summary 1. Ecological stoichiometry predicts important control of the relative abundance key elements carbon (C), nitrogen (N) and phosphorus (P) on trophic interactions. In a nutrient‐poor Amazonian lowland rain forest French Guiana, we tested hypothesis that decomposers exploit stoichiometrically diverse plant litter more efficiently, resulting in faster decomposition compared to with uniform stoichiometry. 2. field experiment presence or absence soil macrofauna, measured mass loss, N P...
Abstract The importance of biodiversity in supporting ecosystem functioning is generally well accepted. However, most evidence comes from small‐scale studies, and scaling‐up patterns biodiversity–ecosystem (B‐EF) remains challenging, part because the environmental factors shaping B‐EF relations poorly understood. Using a forest research platform which 26 functions were measured along gradients tree species richness six regions across Europe, we investigated extent potential drivers context...
Abstract Climate, litter quality and decomposers drive decomposition. However, little is known about whether their relative contribution changes at different decomposition stages. To fill this gap, we evaluated the importance of leaf polyphenols, decomposer communities soil moisture for C N loss stages throughout process. Although both microbial nematode regulated in early stages, legacy effects initial differences played a major role late Our results provide strong evidence substantial...
Summary Proper estimates of decomposition are essential for tropical forests, given their key role in the global carbon (C) cycle. However, current paradigm litter is insufficient to account recent observations and may limit model predictions highly diverse ecosystems. In light findings from a nutrient‐poor Amazonian rainforest, we revisit commonly held views that: traits mere legacy live leaf traits; nitrogen (N) lignin controlling decomposition; favourable climatic conditions result rapid...
Many experiments have shown that local biodiversity loss impairs the ability of ecosystems to maintain multiple ecosystem functions at high levels (multifunctionality). In contrast, role in driving multifunctionality landscape scales remains unresolved. We used a comprehensive pan-European dataset, including 16 measured 209 forest plots across six European countries, and performed simulations investigate how plot-scale richness tree species (α-diversity) their turnover between (β-diversity)...
Summary Plant leaf litter comprises the major common source of energy and nutrients in forested soil freshwater ecosystems world‐wide. However, despite similarity physical biochemical processes, generalizations across aquatic terrestrial regarding decomposition drivers remain elusive. We re‐analysed data from a published field experiment conducted two (forest floors streams) five biomes (from tropics to subarctic) with increasing decomposer community complexity (microbes, microbes mesofauna,...
Abstract There is considerable evidence that biodiversity promotes multiple ecosystem functions (multifunctionality), thus ensuring the delivery of services important for human well-being. However, mechanisms underlying this relationship are poorly understood, especially in natural ecosystems. We develop a novel approach to partition effects on multifunctionality into three and apply European forest data. show throughout Europe, tree diversity positively related with when moderate levels...
Significance Decomposition of plant roots and associated fungal mutualists is a dominant process in ecosystem carbon cycles, yet woefully understudied compared with decomposition leaf litter, particularly for the finest order that have highest turnover. In field experiment, we finest, most distal litter among 35 cooccurring temperate forest species over 6 years. We found rates root tips were considerably lower than those controlled by nonlignin compounds contrast to lignin:nitrogen ratio...
Rising concentrations of atmospheric carbon dioxide have been predicted to stimulate the growth forest trees. However, long‐term effects on trees growing maturity and canopy closure while exposed elevated CO 2 never examined. We compared tree ring chronologies Mediterranean Quercus ilex which continuously (around 650 μmol mol –1 ) since they were seedlings, near two separate natural springs with those from at nearby ambient‐CO ‘control’ sites. Trees grown under high for 30 years (1964–93)...
• Distinct ecosystem level carbon : nitrogen phosphorus (C N P) stoichiometries in forest foliage have been suggested to reflect ecosystem-scale selection for physiological strategies plant nutrient use. Here, this hypothesis was explored a nutrient-poor lowland rainforest French Guiana. Variation C, and P concentrations evaluated leaf litter from neighbour trees of 45 different species, the major C fractions were also measured. Litter ranged 45.3 52.4%, varied threefold (0.68–2.01%),...
Tannins are believed to be particularly abundant in tropical tree foliage and mainly associated with plant herbivore defense. Very little is known of the quantity, variation, potential role tannins leaf litter. Here we report on interspecific variability litter condensed tannin (CT) concentration among 16 co‐occurring rain forest species French Guiana explore functional significance variable CT for decomposition. We compared some classical methods ecological literature a method based...