Mathieu Floury

Mathieu Floury
French National Institute for Agriculture, Food, and Environment (INRAE) | INRAE · Department of Waters

PhD in Freshwater Ecology

About

23
Publications
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Introduction
I'm also currently a visiting postdoc at IGB (Berlin) in Sami Domisch's research group GLOWABIO https://glowabio.org/

Publications

Publications (23)
Article
Although species traits have the potential to disentangle long-term effects of multiple, potentially confounded, drivers in ecosystems, this issue has received very little attention in the literature. We aimed at filling this gap by assessing the relative effects of hydroclimatic and water quality factors on the trait composition of invertebrate as...
Article
When investigating the fields of biogeography and macroecology, climate- and productivity-related variables are frequently identified as the strongest correlates of species-diversity patterns. These variables have been usually merged under the climate/productivity hypothesis and describe the direct and indirect actions of climate on species. Being...
Article
Full-text available
Global change is increasing biotic homogenization globally, which modifies the functioning of ecosystems. While tendencies towards taxonomic homogenization in biological communities have been extensively studied, functional homogenization remains an understudied facet of biodiversity. Here, we tested four hypotheses related to long-term changes (19...
Article
Full-text available
Aim Estimate the current and future distribution of brown trout and identify priority areas for conservation of the species. Location Rhône River basin and Mediterranean streams. Methods We first developed a spatially explicit species distribution model to estimate the current and future distribution of brown trout for three time horizons (2030,...
Article
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Understanding temporal changes in the composition of species communities over spatial and temporal scales relevant to conservation management is crucial for preventing further biodiversity declines. Here, we assessed patterns and potential drivers of taxonomic and functional temporal β diversity over 26 years (1991–2016) of 64 river macroinvertebra...
Article
Full-text available
In large-scale aquatic ecological studies, direct habitat descriptors (e.g. water temperature, hydraulics in river reaches) are often approximated by coarse-grain surrogates (e.g. air temperature, discharge respectively) since they are easier to measure or model. However, as biological variability can be very strong at the habitat scale, surrogate...
Preprint
Full-text available
As alien invasive species are a key driver of biodiversity loss, understanding patterns of rapidly changing global species compositions depends upon knowledge of biological invasion dynamics and trends. The Ponto-Caspian region is among the most notable donor regions for aquatic invasive species in Europe. Using macroinvertebrate time series collec...
Article
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While it is recognized that biodiversity currently declines at a global scale, we still have an incomplete understanding of local biodiversity trends under global change. To address this deficiency, we examined the recent decadal trends in water quality and biodiversity (taxonomic and functional) of key river organisms (diatoms, macroinvertebrates...
Chapter
This chapter discusses the historical perspective, geography, climate, hydrology, biodiversity of the continental Atlantic rivers, the Meuse, Loire and Adour-Garonne. Continental Atlantic rivers drain the western front of Europe which is delineated by the Atlantic Ocean in the west, the English Channel and Hercynian massifs of the Ardennes in the n...
Article
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Recent studies suggest that climate change, with warmer water temperatures and lower and longer low flows, may enhance harmful planktic cyanobacterial growth in lakes and large rivers. Concomitantly, controlling nutrient loadings has proven effective in reducing phytoplankton biomass especially in North America and Western Europe. In addition, the...
Technical Report
Full-text available
(FR) Les réservoirs biologiques constituent des espaces vitaux pour la biodiversité aquatique : ce sont des espaces de vie pour la flore et la faune, habitats, zones de reproduction, nourriceries ou refuges. Ils sont choisis et définis géographiquement de façon à « irriguer » biologiquement un ensemble plus vaste du réseau hydrographique. Ils sont...
Article
Full-text available
The quantification of solute and sediment export from drainage basins is challenging. A large proportion of annual or decadal loads of most constituents is exported during relatively short periods of time, a “hot moment,” which vary between constituents and catchments. We developed a new framework based on concentration-discharge (C-Q) relationship...
Article
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Resilience in river ecosystems requires that organisms must persist in the face of highly dynamic hydrological and geomorphological variations. Disturbance events such as floods and droughts are postulated to shape life history traits that support resilience, but river management and conservation would benefit from greater understanding of the emer...
Article
Atlantic salmon populations have experienced strong declines in most large European rivers. In the Loire Basin, France, a major restocking effort has been carried out on the Allier River to reduce the wild population decline. This study aimed at investigating the trophic insertion of hatchery‐reared salmon parr and whether they compete for resource...
Article
Full-text available
Riverbank erosion is linked to increasing risks in piedmont areas due to urbanization and hydromorphological alterations of rivers. Changes in riparian vegetation and in sediment dynamics modify aquatic macroinvertebrate communities. In this context, riverbank stabilization is a major issue in the conservation of stream ecosystem functioning. In th...
Article
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Many large European rivers have undergone multiple pressures which have strongly impaired ecosystem functioning at different spatial and temporal scales. Global warming and other environmental changes have favoured the success of invasive species, deeply modifying the structure of aquatic communities in large rivers. Some exogenous species could al...
Article
Full-text available
Aquatic species living in running waters are widely acknowledged to be vulnerable to climate-induced, thermal and hydrological fluctuations. Climate changes can interact with other environmental changes to determine structural and functional attributes of communities. Although such complex interactions are most likely to occur in a multiple-stresso...
Thesis
Full-text available
Evidence for climate change effects on biodiversity at global scale is now unequivocal. Among impaired ecosystems, running waters are particularly vulnerable to climate fluctuations. Changes in aquatic community structure and composition are then considered as integrative signals of the ecological responses to these climate changes. Under certain c...
Article
Water temperature and discharge are fundamental to lotic ecosystem function, and both are strongly affected by climate. In large river catchments, however, climatic effects might be difficult to discern from background variability and other cumulative sources of anthropogenic change arising from local land and water management. Here, we use trend a...

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Projects

Projects (3)
Project
Many freshwater research have attempted to explain biodiversity patterns using environmental drivers especially along the upstream-downstream gradient. This is the central aim of longitudinal zonation such as that of Verneaux, Huet or Vannote et al.. However, most of those studies have focused on a single taxa like fish or macroinvertebrates although studying the whole community would be more relevant. In addition, they had limited access to high-resolution environmental variables which directly influence stream ecosystems at large scale, and generally used less accurate data instead (e.g. air temperature is classically used as a proxy of water temperature; water flow is extrapolated from data of the nearest hydrological monitoring station). The aim of this project (MSc internship + PhD) is to identify which environmental parameters are driving fish and macroinvertebrates assemblages along the river network of large French catchments, and especially the largest one, the Loire River. Large datasets on fish, macroinvertebrates and environmental variables (especially modelled water temperature and discharge) in the Loire basin were assembled. Species data came from public national databases whereas environmental data were extracted from the dynamic model T-NET simulating stream temperature and discharge at the scale of the whole Loire catchment (Beaufort et al. 2016). By relating species distribution to environmental parameters, we aim at identifying and quantifying the role of environmental drivers in shaping the spatial structure of riverine communities.
Project
Investigating long-term trends in hydroclimatic and water quality factors in multi-stressed large rivers, and their relative effects on taxonomic and trait composition of invertebrate communities.
Project
Distinguishing the relative influence of climatic and trophic processes on large-scale, long-term changes in composition and functioning of freshwater invertebrate communities.