A5026021893- Freshwater macroinvertebrate diversity and ecology
- Soil and Water Nutrient Dynamics
- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Plant Pathogens and Fungal Diseases
- Microbial Community Ecology and Physiology
- Forest Ecology and Biodiversity Studies
- Hydrology and Sediment Transport Processes
- Environmental DNA in Biodiversity Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Land Use and Ecosystem Services
- Mollusks and Parasites Studies
- Bacterial Identification and Susceptibility Testing
- Marine Biology and Environmental Chemistry
- Nanotechnology research and applications
- Water Quality and Pollution Assessment
- Wildlife Ecology and Conservation
- Marine and coastal ecosystems
- Hydrology and Watershed Management Studies
- Conservation, Biodiversity, and Resource Management
- Graphene and Nanomaterials Applications
- Historical and Environmental Studies
- Diatoms and Algae Research
- RNA and protein synthesis mechanisms
- Microplastics and Plastic Pollution
Laboratoire Écologie Fonctionnelle et Environnement
2010-2024
Institute of Marine Research
2021-2024
Université de Lorraine
2013-2024
University of Applied Sciences and Arts of Southern Switzerland
2019-2024
Centre National de la Recherche Scientifique
2010-2024
Laboratoire Interdisciplinaire des Environnements Continentaux
2013-2024
University of Coimbra
2015-2021
University of Geneva
2019
Leibniz Institute of Freshwater Ecology and Inland Fisheries
2013-2018
Université de Toulouse
2010-2015
An experiment in >1000 river and riparian sites found spatial patterns controls of carbon processing at the global scale.
In detritus-based ecosystems, autochthonous primary production contributes very little to the detritus pool. Yet producers may still influence functioning of these ecosystems through complex interactions with decomposers and detritivores. Recent studies have suggested that, in aquatic systems, small amounts labile carbon (C) (e.g., producer exudates), could increase mineralization more recalcitrant organic-matter pools leaf litter). This process, called priming effect, should be exacerbated...
Summary 1. Leaf litter constitutes the major source of organic matter and energy in woodland stream ecosystems. A substantial part leaf entering running waters may be buried streambed as a consequence flooding sediment movement. While decomposition surface is relatively well understood, its fate when incorporated into river sediments, involvement invertebrate fungal decomposers such conditions, remain poorly documented. 2. We tested experimentally hypotheses that small interstices restrict...
Fifty years after the hyporheic zone was first defined (Orghidan, 1959), there are still gaps in knowledge regarding role of biodiversity processes. First, some methodological questions remained unanswered interactions between and physical processes, both for study habitat characteristics at different scales. Furthermore, many remain to be addressed help inform our understanding invertebrate community dynamics, especially trophic niches organisms, functional groups present within sediment,...
Summary 1. Heterotrophic microorganisms are crucial for mineralising leaf litter and rendering it more palatable to leaf‐shredding invertebrates. A substantial part of entering running waters may be buried in the streambed thus exposed constraining conditions prevailing hyporheic zone. The fate this organic matter particularly role microbial conditioning habitat remain largely unexplored. 2. aim study was determine how location within (i.e. at surface or buried), as well burial history,...
Rivers and streams contribute to global carbon cycling by decomposing immense quantities of terrestrial plant matter. However, decomposition rates are highly variable large-scale patterns drivers this process remain poorly understood. Using a cellulose-based assay reflect the primary constituent detritus, we generated predictive model (81% variance explained) for cellulose across 514 globally distributed streams. A large number variables were important predicting decomposition, highlighting...
The rapid proliferation of silver nanoparticles (AgNP) in industry and the environment requires realistic toxicity assessments based on approaches that consider biological complexity ecosystems. Here we assessed acute carbonate-coated AgNP and, for comparison, AgNO3 (Ag(+)) by using a model system consisting decomposing plant litter associated fungal bacterial decomposers as central players functioning stream Little variation size surface charge during experiment indicated used were...
Summary Leaf litter from riparian vegetation provides the main source of matter and energy for food webs small forest streams. Shredding macroinvertebrates mostly feed on this when it has been colonised conditioned by microorganisms, especially aquatic hyphomycetes. Since shredders selectively, they must make foraging decisions based physical chemical characteristics resource, which can change depending identity fungal species. Here, we addressed effect changes in assemblage structure...
More than half of the world's rivers dry up periodically, but our understanding biological communities in riverbeds remains limited. Specifically, roles dispersal, environmental filtering and biotic interactions driving biodiversity are poorly understood. Here, we conduct a large-scale coordinated survey patterns drivers riverbeds. We focus on eight major taxa, including microorganisms, invertebrates plants: Algae, Archaea, Bacteria, Fungi, Protozoa, Arthropods, Nematodes Streptophyta. use...
Abstract Microbes play a critical role in plant litter decomposition and influence the fate of carbon rivers riparian zones. When decomposing low‐nutrient litter, microbes acquire nitrogen (N) phosphorus (P) from environment (i.e., nutrient immobilization), this process is potentially sensitive to loading changing climate. Nonetheless, environmental controls on immobilization are poorly understood because rates also influenced by chemistry, which coupled same factors. Here we used...
Aquatic hyphomycetes strongly contribute to organic matter dynamics in streams, but their abilities colonize leaf litter buried streambed sediments remain unexplored. Here, we conducted field and laboratory experiments (slow-filtration columns stream-simulating microcosms) test the following hypotheses: (i) that hyporheic habitat acting as a physical sieve for spores filters out unsuccessful strategists from potential species pool, (ii) decreased pore size reduces dispersal efficiency...
Roost site selection, daily movement patterns and home range area of African bats are poorly known. We used radio-telemetry to investigate these parameters in the bat Nycteris thebaica. The predominantly antbear Orycteropus afer burrows or culverts as night roosts. Day roost sites included caves burrows. Individuals travelled an average 1.1 km between day roosts foraging areas, a distance similar that predicted from comparative study aspect ratios. Foraging (home) ranges were relatively...
We combined microscopic and molecular methods to investigate fungal assemblages on alder leaf litter exposed in the benthic hyporheic zones of five streams across a gradient increasing acidification for 4 weeks. The results showed that elevated Al concentrations strongly depressed sporulating aquatic hyphomycetes diversity both streams, while assessed by denaturing gel electrophoresis (DGGE) appeared unaffected. Clone library analyses revealed communities leaves were dominated members...
Protein fingerprinting using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a rapid, reliable, and economical method to characterize isolates of terrestrial fungi other microorganisms. The objective our study was evaluate the suitability MALDI-TOF MS for identification aquatic hyphomycetes, polyphyletic group that play crucial roles in stream ecosystems. To this end, we used 34 21 hyphomycete species whose identity confirmed by spore...
Headwater woodland streams are primarily heterotrophic: they receive substantial inputs of organic matter from the riparian vegetation, while autochthonous primary production is generally low. A part leaf litter entering running waters may be buried in streambed because flooding and sediment movement. Although general significance hyporheic zone for stream metabolism has been reported early, storage within received less attention, with most studies only quantifying accumulations at surface...
The enrichment of ecosystems by nutrients such as nitrogen (N) and phosphorus (P) has important ecological consequences. These include effects on plant litter decomposition in forest soils forested headwater streams, where fungi play a pivotal role. However, our understanding nutrient relationships fungal communities associated with decomposing remains surprisingly incomplete. We conducted fully factorial microcosm experiment known decomposers from streams to assess the importance dissolved...