Pierre Gaüzère

Pierre Gaüzère
French National Centre for Scientific Research | CNRS · Laboratoire d'Ecologie Alpine (UMR 5553)

PhD Ecology and evolutionary biology

About

28
Publications
9,695
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457
Citations
Introduction
I am a quantitative ecologist with (broad) interests in macroecology, community ecology, functional ecology, biogeography and conservation biology. My research focuses on how spatial and temporal dynamics of biodiversity are shaped by abiotic and biotic processes, with a specific interest on the impact of global changes at multiple spatio-temporal scales. I mainly focus on ecoinformatics approach to explore long-term and large spatial-scale patterns and processes.
Additional affiliations
February 2020 - November 2020
Université Grenoble Alpes
Position
  • PostDoc Position
January 2018 - present
Arizona State University
Position
  • PostDoc Position
February 2013 - present
Université de Montpellier
Position
  • PhD Student

Publications

Publications (28)
Article
Aim We disentangle three facets of species commonness (local abundance, geographical range size, degree of habitat generalization) to identify how species segregate along these axes and how each of these facets determines the relative functional originality of each species (i.e. the mean trait distance of a species with others). At the community le...
Article
Full-text available
The local spatial congruence between climate changes and community changes has rarely been studied over large areas. We proposed one of the first comprehensive frameworks tracking local changes in community composition related to climate changes. First, we investigated whether and how 12 years of changes in the local composition of bird communities...
Article
Full-text available
Taxonomic, functional, and phylogenetic diversities are important facets of biodiversity. Studying them together has improved our understanding of community dynamics, ecosystem functioning, and conservation values.1–3 In contrast to species, traits, and phylogenies, the diversity of biotic interactions has so far been largely ignored as a biodivers...
Article
Full-text available
Despite evidence of a positive effect of functional diversity on ecosystem productivity, the importance of functionally distinct species (i.e., species that display an original combination of traits) is poorly understood. To investigate how distinct species affect ecosystem productivity, we used a forest gap model to simulate realistic temperate fo...
Article
Full-text available
The impact of global change on biodiversity is commonly assessed in terms of changes in species distributions, community richness and community composition. Whether and how much associations between species are also changing is much less documented. In this study, we quantify changes in large-scale patterns of species associations in bird communiti...
Article
Species responses to climate change depend on environment, genetics, and interactions among these factors. Intraspecific cytotype (ploidy level) variation is a common type of genetic variation in many species. However, the importance of intraspecific cytotype variation in determining demography across environments is poorly known. We studied the tr...
Article
Ecosystem degradation and biodiversity loss have been caused by economic booms in developing countries over recent decades. In response, ecosystem restoration projects have been advanced in some countries but the effectiveness of different approaches and indicators at large spatio-temporal scales (i.e. whole catchments) remains poorly understood. T...
Article
Global changes alter the dynamics of biodiversity, and are forecasted to continue or worsen in the decades to come. Modelling approaches used to anticipate these impacts are mainly based on the equivalence between spatial and temporal response to environmental forcings, generally called space‐for‐time substitution. However, several processes are kn...
Article
Full-text available
Little is known about whether changes in lake ecosystem structure over the past 150 years are unprecedented when considering longer timescales. Similarly, research linking environmental stressors to lake ecological resilience has traditionally focused on a few sentinel sites, hindering the study of spatially synchronous changes across large areas....
Article
Conserving functionally diverse bird communities in European farmland is becoming critical, with no exception for regions of wine production. Management intensification combined with the loss of semi‐natural habitats in wine‐growing landscapes has led to a long‐term decline in birds of conservation concern, but also in once common insectivores and...
Preprint
Full-text available
Aim The impact of global change on biodiversity is commonly assessed in terms of changes in species distributions, species richness and species composition across communities. Whether and how much interactions between species are also changing is much less documented and mostly limited to local studies of ecological networks. Moreover, we largely i...
Article
Full-text available
Aim The functional trait composition of plant communities is thought to be determined largely by climate, but relationships between contemporary trait distributions and climate are often weak. Spatial mismatches between trait and climatic conditions are commonly thought to arise from disequilibrium responses to past environmental changes. We aimed...
Article
Full-text available
It is controversial whether communities are saturated with species, or have vacant niches. The prevalence of vacant niches and the processes likely to promote their existence are poorly known. We used a process‐based forest gap‐model to simulate plant community dynamics in 11 sites along a climatic gradient across central Europe. We then used hyper...
Article
Rural landscapes of western Europe have considerably changed in the last decades under the combined pressure of climate and land use changes, leading to a dramatic decline of farmland biodiversity, including common farmland birds. The respective roles of climate and land use and cover changes in driving bird population trends are primarily assessed...
Article
Community Weighted Means (CWM) are valuable tools describing community composition with respect to one given trait. They have been widely used as indicators in global change studies to measure biodiversity responses to environmental perturbations. However, how individual species contribute to such community indicators has hardly been investigated....
Article
Full-text available
Robust predictions of ecosystem responses to climate change are challenging. To achieve such predictions, ecology has extensively relied on the assumption that community states and dynamics are at equilibrium with climate. However, empirical evidence from Quaternary and contemporary data suggest that species communities rarely follow equilibrium dy...
Article
Full-text available
Global changes are modifying the structure of species assemblages, but the generality of resulting diversity patterns and of their drivers is poorly understood. Any such changes can be detected and explained by comparing temporal trends in taxonomic and functional diversity over broad spatial extents. In this study, we addressed three complementary...
Thesis
Full-text available
Les changements globaux affectent la biodiversité à tous les niveaux de l’espace, du temps et d’organisation biologique. Afin de limiter notre impact sur le monde naturel, il est nécessaire de concilier nos activités avec les dynamiques de la biodiversité. Dans ce but, l’écologie scientifique a pour rôle d’apporter les connaissances scientifiques n...
Article
The spatial tracking of climatic shifts is frequently reported as a biodiversity response to climatic change. However, species' range shifts are often idiosyncratic and inconsistent with climatic shift predictions. At the community scale, this discrepancy can be measured by comparing the spatial shift in the relative composition of cold- vs warm-ad...
Article
Climate change is known to drive both the reshuffling of whole assemblages and range shifts of individual species. Less is known about how local colonizations and extinctions of individual species contribute to changes at the community level. Our aim was to estimate the contribution of individual species to a change in community composition attribu...
Article
Abstract Context In heterogeneous landscapes, habitat complementation is a key process underlying the distribution of mobile species able to exploit non-substitutable resources over large home ranges. For instance, insectivorous bats need to forage in a diversity of habitat patches offering varied compositions and structures within forest landscape...
Article
Protected areas (PAs) are the mainstay of our conservation strategies. While they may succeed in locally preventing species and habitat degradation due to human activities, their ability to mitigate the impacts of climate change on biodiversity is still debated. We assessed whether community and species responses to climate change were related to P...
Article
We disentangle three facets of species commonness (local abundance, geographical range size, degree of habitat generalization) to identify how species segregate along these axes and how each of these facets determines the relative functional originality of each species (i.e. the mean trait distance of a species with others). At the community level...

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