A5029365454- Environmental DNA in Biodiversity Studies
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Wastewater Treatment and Nitrogen Removal
- Genetic diversity and population structure
- Mycorrhizal Fungi and Plant Interactions
- Ecology and Vegetation Dynamics Studies
- Identification and Quantification in Food
- Plant and animal studies
- Primate Behavior and Ecology
- Plant Pathogens and Resistance
- Forest Ecology and Biodiversity Studies
- Advanced biosensing and bioanalysis techniques
- Plant Diversity and Evolution
- Protist diversity and phylogeny
- Invertebrate Taxonomy and Ecology
- Plant Pathogens and Fungal Diseases
- DNA and Nucleic Acid Chemistry
- Amphibian and Reptile Biology
- Soil Carbon and Nitrogen Dynamics
- Lepidoptera: Biology and Taxonomy
- Wildlife Ecology and Conservation
- Dendrimers and Hyperbranched Polymers
- Species Distribution and Climate Change
- Banana Cultivation and Research
Université Toulouse III - Paul Sabatier
2015-2024
Institut de Recherche pour le Développement
2018-2024
Centre National de la Recherche Scientifique
2015-2024
Université de Toulouse
2014-2024
Centre de Recherche sur la Biodiversité et l'Environnement
2024
Laboratoire Evolution et Diversite Biologique
2016-2023
Ecolab (United Kingdom)
2015
Institut National Polytechnique de Toulouse
2015
Abstract Determining the species compositions of local assemblages is a prerequisite to understanding how anthropogenic disturbances affect biodiversity. However, biodiversity measurements often remain incomplete due limited efficiency sampling methods. This particularly true in freshwater tropical environments that host rich fish assemblages, for which assessments are uncertain and rely on destructive Developing an efficient nondestructive method assess freshwaters highly important. In this...
Tropical forests shelter an unparalleled biological diversity. The relative influence of environmental selection (i.e., abiotic conditions, biotic interactions) and stochastic-distance-dependent neutral processes demography, dispersal) in shaping communities has been extensively studied for various organisms, but rarely explored across a large range body sizes, particular soil environments. We built detailed census the whole biota 12-ha tropical forest plot using DNA metabarcoding. show that...
Abstract Given the ongoing decline of both pollinators and plants, it is crucial to implement effective methods describe complex pollination networks across time space in a comprehensive high-throughput way. Here we tested if metabarcoding may circumvent limits conventional methodologies detecting quantifying plant-pollinator interactions. Metabarcoding experiments on pollen DNA mixtures described positive relationship between amounts from focal species number trnL ITS1 sequences yielded....
Abstract Environmental DNA (eDNA) metabarcoding is a promising tool to estimate aquatic biodiversity. It based on the capture of from water sample. The sampled volume, crucial aspect for efficient species detection, has been empirically variable (ranging few centiliters tens liters). This results in high variability sampling effort across studies, making comparisons difficult and raising uncertainties about completeness eDNA inventories. Our aim was determine (filtered volume) needed get...
Abstract Assessing the impact of human activity on ecosystems often links local biodiversity to disturbances measured within same locality. However, remote may also affect biodiversity. Here, we used environmental DNA metabarcoding evaluate relationships between vertebrate (fish and mammals) disturbance intensity in two Amazonian rivers. Measurements anthropic -here forest cover losses- were made from immediate vicinity sampling sites up 90 km upstream. The findings suggest that...
AimsThe coastal Brazilian rainforest on white-sand (restinga) ranks among the most fragmented forest types in tropics, owing to both patchy distribution of sandy soils and widespread development activities. Here we study environmental evolutionary determinants a tree assemblage at single restinga Southeastern Brazil. We also explore ability competing hypotheses explain maintenance species diversity this type, which includes contrasting extremes edaphic conditions associated with flooding stress.
In this study, the results of conventional stomach‐content analysis are compared with recent DNA metabarcoding approach on faeces to identify fish species consumed by non‐native European catfish Silurus glanis in Garonne River (south‐western France), a special emphasis anadromous prey. Fourteen prey were identified stomach contents or faeces, including four species. Despite higher intestine than emptiness, more through faecal (11 14) (five suggesting that is an efficient, non‐intrusive...
Abstract Global biodiversity is under accelerating threats, and species are succumbing to extinction before being described. Madagascar’s biota represents an extreme example of this scenario, with the added complication that much its endemic cryptic. Here we illustrate best practices for clarifying cryptic diversification processes by presenting integrative framework leverages multiple lines evidence taxon-informed cut-offs delimitation, while placing special emphasis on identifying patterns...
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...
A bstract Mouse lemurs ( Microcebus ) are a radiation of morphologically cryptic primates distributed throughout Madagascar for which the number recognized species has exploded in past two decades. This taxonomic explosion prompted understandable concern that there been substantial oversplitting mouse lemur clade. Here, we take an integrative approach to investigate diversity pairs sister lineages occur region northeastern with high levels microendemism and predicted habitat loss. We...
Pan-tropically, liana density increases with decreasing rainfall and increasing seasonality. This pattern has led to the hypothesis that lianas display a growth advantage over trees under dry conditions. However, physiological mechanisms underpinning this remain elusive. A key trait influencing leaf plant drought tolerance is water potential at turgor loss point (π
ABSTRACT The relative influence of deterministic niche-based (i.e. abiotic conditions, biotic interactions) and stochastic-distance dependent neutral processes demography, dispersal) in shaping communities has been extensively studied for various organisms, but is far less explored jointly across the tree life, particular soil environments. Here, using a thorough DNA-based census whole biota large tropical forest plot, we show that aluminium, topography, plant species identity are all...
Abstract Community assembly theory assumes that ecological communities are spatially delimited into patches. Within these patches, coexistence results from environmental filtering, competition and immigration. Truly delineated exist in laboratory studies of microbial cultures Petri dishes, yet empirical tests conducted continuous environments often use patches defined by convention as opposed to realized boundaries. Here we perform a test community rules using foliar endophyte tropical...
High-throughput sequencing of amplicons from environmental DNA samples permits rapid, standardized and comprehensive biodiversity assessments. However, retrieving interpreting the structure such data sets requires efficient methods for dimensionality reduction. Latent Dirichlet Allocation (LDA) can be used to decompose into overlapping assemblages co-occurring taxa. It is a flexible model-based method adapted uneven sample sizes large sparse sets. Here, we compare LDA performance on...
Urban expansion and associated habitat transformation drives shifts in biodiversity, with declines taxonomic functional diversity. Forests fragments within urban landscapes offer a number of ecosystem services, help to maintain biodiversity functions. Here, we focus on tropical forest environment, the soil biota. Using eDNA metabarcoding, compare city Cayenne, French Guiana, neighbouring continuous undisturbed forest. We wished determine if conserve high levels alpha beta diversity as well...
DNA barcoding helps to identify species, especially when identification is based on parts of organisms or life stages such as seeds, pollen, wood, roots juveniles. However, the implementation this approach strongly depends existence complete reference libraries sequences. If a library incomplete, DNA-based will be inefficient. Here, we assess if can already implemented in species-rich tropical regions. We focus tree flora São Paulo state, Brazil, which contains more than 2000 species. Using...
Understanding the mechanisms that drive change of biotic assemblages over space and time is main quest community ecology. Assessing relative importance dispersal environmental species selection in a range organismic sizes motilities has been fruitful strategy. A consensus for whether spatial distances operate similarly across scales taxa, however, yet to emerge. We used censuses four major groups organisms (soil bacteria, fungi, ground insects, trees) at two observation (1-m2 sampling point...
Climate warming and landscape fragmentation are both factors well known to threaten biodiversity generate species responses adaptation. However, the impact of interplay on organismal remains largely under-explored, especially when it comes gut symbionts, which may play a key role in essential host functions traits by extending its functional genetic repertoire. Here, we experimentally examined combined effects climate habitat connectivity bacterial communities common lizard ( Zootoca...
The complete mitochondrial genome of the cracker butterfly Hamadryas epinome (C. Felder and R. Felder, 1867) (Lepidoptera: Nymphalidae: Biblidinae) has been sequenced using a genome-skimming approach on an Illumina Hiseq 2000 platform. H. was determined to be 15,207 bp long presents organization similar other Ditrysia mitogenomes. A non-coding poly-AT region uncertain length is present at position 6180.