Supervisory authorities

CNRS

Our LABEX

Our Networks

Search




Visitors logged in: 6


Home > Communication > Scientific newsletter > Scientific publications

Scientific publications Scientific publications feed

Page(s) : < | 1 | ... | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | ... | 273 |

18 May 2018

Taboo adherence and presence of Perrier’s sifaka (Propithecus perrieri) in Andrafiamena forest [Madagascar Conservation & Development]

Jordi Salmona, Fabien Jan, Lounès Chikhi

Habitat loss and poaching are among the most serious threats to the fragile and unique biodiversity of Madagascar. In the past, traditional taboos (fady), commonly associated with folk stories, have had a buffering effect on several lemur species. Here, we examine the status of hunting taboos with reference to the conservation of the critically endangered Perrier´s sifaka (Propithecus perrieri). We also provide an update on P. perrieri’s presence in the protected area of Andrafiamena in the face of ongoing habitat fragmentation and poaching.(...)

Read more

18 May 2018

Development and worldwide use of non-lethal, and minimal population-level impact, protocols for the isolation of amphibian chytrid fungi [Scientific Reports]

Keywords : biological techniques, ecological epidemiology, microbiology

Parasitic chytrid fungi have emerged as a significant threat to amphibian species worldwide, necessitating the development of techniques to isolate these pathogens into culture for research purposes. However, early methods of isolating chytrids from their hosts relied on killing amphibians. We modified a pre-existing protocol for isolating chytrids from infected animals to use toe clips and biopsies from toe webbing rather than euthanizing hosts, and distributed the protocol to researchers as part of the BiodivERsA project RACE; here called the RML protocol.(...)

Read more

16 May 2018

Comprehensive phylogeny of ray-finned fishes (Actinopterygii) based on transcriptomic and genomic data [PNAS]

Keywords : phylogenomics, divergence times, bony fish, paralogy, tree of life

Ray-finned fishes form the largest and most diverse group of vertebrates. Establishing their phylogenetic relationships is a critical step to explaining their diversity. We compiled the largest comparative genomic database of fishes that provides genome-scale support for previous phylogenetic results and used it to resolve further some contentious relationships in fish phylogeny. A vetted set of exon markers identified in this study is a promising resource for current sequencing approaches to significantly increase genetic and taxonomic coverage to resolve the tree of life for all fishes. Our time-calibrated analysis suggests that most lineages of living fishes were already established in the Mesozoic Period, more than 65 million years ago.

Read more

16 May 2018

Origin and maintenance of chemical diversity in a species-rich tropical tree lineage [Nature Ecology & Evolution]

Keywords : evolutionary ecology, tropical ecology

Plant secondary metabolites play important ecological and evolutionary roles, most notably in the deterrence of natural enemies. The classical theory explaining the evolution of plant chemical diversity is that new defences arise through a pairwise co-evolutionary arms race between plants and their specialized natural enemies. However, plant species are bombarded by dozens of different herbivore taxa from disparate phylogenetic lineages that span a wide range of feeding strategies and have distinctive physiological constraints that interact differently with particular plant metabolites. How do plant defence chemicals evolve under such multiple and potentially contrasting selective pressures imposed by diverse herbivore communities? To tackle this question, we exhaustively characterized the chemical diversity and insect herbivore fauna from 31 sympatric species of Amazonian Protieae (Burseraceae) trees.(...)

Read more

16 May 2018

Plant spectral diversity integrates functional and phylogenetic components of biodiversity and predicts ecosystem function [Nature Ecology & Evolution]

Keywords : biodiversity, ecology

Biodiversity promotes ecosystem function as a consequence of functional differences among organisms that enable resource partitioning and facilitation. As the need for biodiversity assessments increases in the face of accelerated global change, novel approaches that are rapid, repeatable and scalable are critical, especially in ecosystems for which information about species identity and the number of species is difficult to acquire. Here, we present ’spectral diversity’—a spectroscopic index of the variability of electromagnetic radiation reflected from plants measured in the visible, near-infrared and short-wave infrared regions (400–2,400 nm). Using data collected from the Cedar Creek biodiversity experiment (Minnesota, USA), we provide evidence that the dissimilarity of species’ leaf spectra increases with functional dissimilarity and evolutionary divergence time.(...)

Read more

Page(s) : < | 1 | ... | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | ... | 273 |