A5004315831- Isotope Analysis in Ecology
- Animal Ecology and Behavior Studies
- Marine animal studies overview
- Turtle Biology and Conservation
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Avian ecology and behavior
- Amphibian and Reptile Biology
- Fish Ecology and Management Studies
- Wildlife Ecology and Conservation
- Geology and Paleoclimatology Research
- Bird parasitology and diseases
- Marine and fisheries research
- Mercury impact and mitigation studies
- Insect and Pesticide Research
- Genetic diversity and population structure
- Marine Bivalve and Aquaculture Studies
- Ichthyology and Marine Biology
- Animal Behavior and Reproduction
- Environmental Toxicology and Ecotoxicology
- Pacific and Southeast Asian Studies
- Meat and Animal Product Quality
- Ecology and Vegetation Dynamics Studies
- Marine and coastal plant biology
- Evolution and Paleontology Studies
Estación Biológica de Doñana
2013-2024
Consejo Superior de Investigaciones Científicas
2009-2024
Centre National de la Recherche Scientifique
2006-2023
Écologie, Systématique et Évolution
2006-2023
AgroParisTech
2023
Université Paris-Saclay
2023
Centro de Investigaciones Biológicas Margarita Salas
2013
University of Liège
2008-2011
Zero to Three
2010
Université Paris-Sud
2006-2008
1 The use of stable isotopic techniques to study animal diets and trophic levels requires a priori estimates discrimination factors (Δ13C Δ15N, also called fractionation factors), which are the differences in composition between an its diet. Previous studies have shown that these parameters depend on several sources variation (e.g. taxon, environment, tissue) but diet as source still needs assessment. 2 We conducted extensive review literature (66 publications) concerning animal-diet Δ13C (n...
Summary Rats have reached about 80% of the world's islands and are among most successful invasive mammals. opportunistic predators that notorious for their impact on a variety animal plant species. However, little documented evidence complexities these interactions is available. In our study, we assessed black rats Rattus rattus introduced small uninhabited island with relatively simple ecosystem, Surprise Island, New Caledonia. We also compared diet R. in presence absence breeding seabirds,...
1 Naturally occurring stable isotopes in resources and their consumer allow the estimation of nutritional flows between two have been much used to improve our understanding ecology free-living animals. 2 The difference isotopic composition an animal its diet is represented by a discrimination factor. Carbon nitrogen are estimated calculating factors isotope ratios (δ15N δ13C), which presumed be c. 3‰ 1‰ heavier tissues than those resources, respectively. 3 factor known vary according...
Abstract Introduced vertebrate predators are one of the most important threats to endemic species throughout a range ecosystems, in particular on islands biodiversity hot spots. Consequently, reduction predator numbers is considered key conservation action management many native vertebrates vulnerable predators. It now established that control attempts may affect non‐target through trophic interactions, but little known concerning their consequences competitive relationships. We study...
Isotopic models are increasingly used to determine the relative contribution of different food sources an animal’s diet. However, these based on restrictive assumptions and provide estimates rather than exact values contributions consumer The inaccuracies in isotopic not well understood laboratory experiments may be useful evaluate model performance. In this paper we assess accuracy three main controlled experiments, involving a breed Norway rats ( Rattus norvegicus (Berkenhout, 1769)),...
There is currently a great deal of interest in using stable isotope methods to investigate diet, trophic level and migration wild cetaceans. In order correctly interpret the results stemming from these methods, it crucial understand how diet isotopic values are reflected consumer tissues. this study, we investigated patterns discrimination between blood constituents two species cetaceans (killer whale, Orcinus orca, bottlenose dolphin, Tursiops truncatus) fed controlled diets over 308 312...
BackgroundThe leatherback turtle (Dermochelys coriacea) has undergone a dramatic decline over the last 25 years, and this is believed to be primarily result of mortality associated with fisheries bycatch followed by egg nesting female harvest. Atlantic turtles undertake long migrations across ocean basins from subtropical tropical beaches productive frontal areas. Migration between two seasons can 2 or 3 time period termed remigration interval (RI). Recent satellite transmitter data revealed...
The transport of nutrients by migratory animals across ecosystem boundaries can significantly enrich recipient food webs, thereby shaping the ecosystems’ structure and function. To illustrate potential role islands in enabling transfer matter to be gauged, we investigated influence seabirds on nitrogen input islands. Basing our study four widely differing terms their biogeography ecological characteristics, sampled at different spatial temporal intervals, analyzed isotopic values main...
Summary 1. In Caut, Angulo & Courchamp (2008a) rats were fed with experimental diets of distinct isotopic values (δ 13 C and δ 15 N) in order to infer the discrimination factors. We showed negative relationships between factors diet values. (2009) , our aim was generalize these other taxonomic groups a view providing ecologists general flexible method obtain for reconstruction studies when difficult otherwise. 2. Perga Grey (2010) claims that there is an artefact design (due protein...
Abstract The ability of invasive mammals to adjust their diet in response new or variable resources is often proposed explain invasion success on islands with differing environmental conditions, especially strong spatiotemporal changes the nature and abundance resources. In this study, we investigated how habitat heterogeneity seasonal fluctuation resource quality affect dietary breadth plasticity an island‐invasive rodent, black rat Rattus rattus , a small Mediterranean island. We tested...
Temporary ponds are highly variable systems where resource availability and community structure change extensively over time, consequently the food web is dynamic. Amphibians play a critical role both as consumers prey in aquatic communities yet there still little information on trophic status of most amphibians. More importantly, known about extent to which they can alter their ecology response changing conditions. We experimentally investigated effects increased amphibian density, presence...
Abstract Seabirds have been particularly affected by invasive non‐native species, which has led to the implementation of numerous eradication campaigns for conservation these keystone and highly vulnerable species. Although benefits species seabird demonstrated, recovery kinetics different populations on islands after remains poorly evaluated. We conducted long‐term monitoring number breeding pairs seven a small atoll, Surprise Island, New Caledonia (southwestern tropical Pacific). Marine...
The hatching success of leatherback turtles, Dermochelys coriacea (Vandelli, 1761), is influenced by heterogeneously distributed ecological factors. However, the according to nest-site selection has rarely been studied and little known about role infertile (yolkless) egg production on predation rate development fertile eggs in turtle nests laid French Guiana. A field study 99 was conducted quantify relationships between (i) (i.e., vegetation line, sea tide line) (ii) eggs, especially their...
Interspecific interactions are often difficult to elucidate, particularly with large vertebrates at spatial scales. Here, we describe a methodology for estimating interspecific by combining stable isotopes bioenergetics. We illustrate this approach modeling the population dynamics and species of suite on Santa Cruz Island, California, USA: two endemic carnivores (the island fox spotted skunk), an exotic herbivore feral pig), their shared predator, Golden Eagle. Sensitivity analyses suggest...
Dispersal has consequences not only for individual fitness, but also population dynamics, genetics and species distribution. Social Hymenoptera show two contrasting colony reproductive strategies, dependent independent foundation modes, these are often associated to the structures derived from inter intra-population gene flow processes conditioned by alternative dispersal strategies. Here we employ microsatellite mitochondrial markers investigate social genetic structure patterns in ant...
The black caiman is one of the largest neotropical top predators, which means that it could play a structuring role within swamp ecosystems. However, because difficulties inherent to studying caimans, data are sorely lacking on many aspects their general biology, natural history, and ecology, especially in French Guiana. We conducted detailed study Agami Pond population using multidisciplinary approach. aim was better understand species' dietary ecology movements pond, thus its functional...