SYLVAIN MASTRORILLO | Université de Toulouse III Paul Sabatier (original) (raw)

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Papers by SYLVAIN MASTRORILLO

Research paper thumbnail of Winter microhabitat distribution of coots ( Fulica atra L.1758) on gravel-pit wetlands in the Garonne river floodplain, Southwest France

Belgian Journal of Zoology, Feb 1, 2004

Research paper thumbnail of Environmental factors influencing the regional distribution and local density of a small benthic fish: the stoneloach ( Barbatula barbatula )

Hydrobiologia, Jul 31, 2005

Research paper thumbnail of Co-occurrence Patterns of Some Small-bodied Freshwater Fishes in Southwestern France: Implications for Fish Conservation and Environmental Management

Ambio a Journal of the Human Environment, Sep 1, 2005

We assessed the influence of environmental variables (elevation, stream order, distance from sour... more We assessed the influence of environmental variables (elevation, stream order, distance from source, catchment area, slope, stream width, and fish species richness) on the co-occurrence patterns of the minnow, the stone loach, and the gudgeon at the stream system scale. A total of 474 sites were classified according to the seven variables using the Self-Organizing Map (neural network), and three clusters were detected (k-means algorithm). The frequency of the various fish co-occurrence patterns was calculated for each cluster, and general linear modeling was used to specify the conditions that predict the occurrence of each species. Piedmont streams were more likely to support coexisting gudgeon and minnow populations because of higher probabilities of occurrence for both species. The higher co-occurrence frequency for the three species together in headwater streams resulted from lower occurrence frequencies in gudgeon and minnow. Focusing on areas that favor the co-occurrence of species may enhance the effectiveness of conservation projects.

Research paper thumbnail of Long-Term Recovery of Macrobenthos and Fish Assemblages After Water Pollution Abatement Measures in the River Petite Baise (France)

Archives of Environmental Contamination and Toxicology, Nov 1, 1997

Research paper thumbnail of Gravel pits as new wetlands for the little grebe Tachybaptus ruficollis

Research paper thumbnail of Microhabitat use by 0+ brown trout (Salmo trutta L.) in a mountain stream affected by hydropeaking operations (Pyrénées, Southeast France)

Research paper thumbnail of Using self-organizing maps to investigate spatial patterns of non-native species

Biological Conservation

Our ability to demonstrate statistical patterns of invasion by non-native species will determine ... more Our ability to demonstrate statistical patterns of invasion by non-native species will determine the success of future management projects. We investigated the suitability of self-organizing maps (SOM, neural network) for patterning habitat invasion by exotic fish species at the regional scale (Southwest France), using a binary dataset of species occurrences. The SOM visualization can be used as an analytical tool to bring out relationships between sample locations and biological variables, but in addition the weight of each species in the output of the SOM can be interpreted as its occurrence probability in various geographic areas. After training the SOM with fish presence/absence data, the k-means algorithm helped to derive three major clusters of sites (headwater, montane, and plain areas). Each cluster was divided into two subsets of sites according to non-native fish, because assemblage compositions delineated different geological areas: Pyrenees Mountains, Massif Central Moun...

Research paper thumbnail of Microhabitat use by brown trout (Salmo trutta L.) in a mountain stream affected by peaking-power hydroelectric operations (Pyrénées, Southeast France)

Research paper thumbnail of Community structure and habitat use of 0+ riverine fish-Microhabitat use by 0+ brown trout (Salmo trutta L.) in a mountain stream affected by hydropeaking operations (Pyrenees, Southeast France)

Research paper thumbnail of Gravel pits as new wetlands for the little grebe Tachybaptus ruficollis

Research paper thumbnail of Interaction between fish and waterbird communities: a case study of two gravel pits in south-west France

Research paper thumbnail of Winter microhabitat distribution of coots (Fulica atra L. 1758) on gravel-pit wetlands in the Garonne river floodplain, Southwest France

Research paper thumbnail of Profils Ecologiques Du Vairon(Phoxinus Phoxinus L.), De La Loche Franche(Barbatula Barbatula L.) et Du Goujon(Gobio Gobio L.) a L'Echelle Du Microhabitat Dans Trois Rivieres Pyreneennes

Research paper thumbnail of Microhabitat use by minnow, gudgeon and stone loach in three rivers in southwestern France

Research paper thumbnail of Rotating disk electrodes to assess river biofilm thickness and elasticity

Research paper thumbnail of Warming-induced changes in denitrifier community structure modulate the ability of phototrophic river biofilms to denitrify

Science of The Total Environment, 2014

Research paper thumbnail of Temperature dependence of denitrification in phototrophic river biofilms

Science of The Total Environment, 2012

Research paper thumbnail of Spatial patterns of the biological traits of freshwater fish communities in south-west France

Journal of Fish Biology, 2005

ABSTRACT Spatial patterns in the combinations of biological traits of fish communities were studi... more ABSTRACT Spatial patterns in the combinations of biological traits of fish communities were studied in the Garonne River system (57 000 km2, south-west France). Fish species assemblages were recorded at 554 sampling sites, and the biological traits of species were described using a fuzzy-coding method. A co-inertia analysis of species distributions and biological traits identified some spatial patterns of species trait combinations. Fish species richness progressively increased from up- to downstream sections, and the longitudinal patterns of fish assemblages partitioned the river into clear biogeographic areas, such as the brown trout Salmo trutta(headwater streams), the grayling Thymallus thymallus, the barbel Barbus barbus and the bream Abramis brama zones (most downstream sections), which fitted with Huet's well-known zonation for western European rivers. Only a few biological traits, chiefly related to life-history attributes, significantly influenced the observed fish distributions. Fecundity, potential size, maximum age and reproductive factor increased from headwater to plain reaches. As a theoretical framework for assessing and predicting the functional organization of stream fish communities, spatial variations in species traits can be related to habitat conditions, thus providing explicit spatial schemes that may be useful to the design of both scientific studies and river management.

Research paper thumbnail of Ontogenetic Microhabitat Shifts in the Bullhead,Cottus gobio L.,in a Fast Flowing Stream

International Review of Hydrobiology, 2005

... of good biological quality (see the fish database at http://www.fishbase.org/), eg, having sa... more ... of good biological quality (see the fish database at http://www.fishbase.org/), eg, having salmonid fish and polluosensitive insects (Ephemeroptera, Plecoptera and Trichop-tera). Many factors, closely related to the destruction of physical and hydraulic stream habi-tats by man ...

Research paper thumbnail of Environmental Factors Influencing Local Fish Species Richness and Differences between Hydroregions in South-Western France

International Review of Hydrobiology, 2004

Research paper thumbnail of Winter microhabitat distribution of coots ( Fulica atra L.1758) on gravel-pit wetlands in the Garonne river floodplain, Southwest France

Belgian Journal of Zoology, Feb 1, 2004

Research paper thumbnail of Environmental factors influencing the regional distribution and local density of a small benthic fish: the stoneloach ( Barbatula barbatula )

Hydrobiologia, Jul 31, 2005

Research paper thumbnail of Co-occurrence Patterns of Some Small-bodied Freshwater Fishes in Southwestern France: Implications for Fish Conservation and Environmental Management

Ambio a Journal of the Human Environment, Sep 1, 2005

We assessed the influence of environmental variables (elevation, stream order, distance from sour... more We assessed the influence of environmental variables (elevation, stream order, distance from source, catchment area, slope, stream width, and fish species richness) on the co-occurrence patterns of the minnow, the stone loach, and the gudgeon at the stream system scale. A total of 474 sites were classified according to the seven variables using the Self-Organizing Map (neural network), and three clusters were detected (k-means algorithm). The frequency of the various fish co-occurrence patterns was calculated for each cluster, and general linear modeling was used to specify the conditions that predict the occurrence of each species. Piedmont streams were more likely to support coexisting gudgeon and minnow populations because of higher probabilities of occurrence for both species. The higher co-occurrence frequency for the three species together in headwater streams resulted from lower occurrence frequencies in gudgeon and minnow. Focusing on areas that favor the co-occurrence of species may enhance the effectiveness of conservation projects.

Research paper thumbnail of Long-Term Recovery of Macrobenthos and Fish Assemblages After Water Pollution Abatement Measures in the River Petite Baise (France)

Archives of Environmental Contamination and Toxicology, Nov 1, 1997

Research paper thumbnail of Gravel pits as new wetlands for the little grebe Tachybaptus ruficollis

Research paper thumbnail of Microhabitat use by 0+ brown trout (Salmo trutta L.) in a mountain stream affected by hydropeaking operations (Pyrénées, Southeast France)

Research paper thumbnail of Using self-organizing maps to investigate spatial patterns of non-native species

Biological Conservation

Our ability to demonstrate statistical patterns of invasion by non-native species will determine ... more Our ability to demonstrate statistical patterns of invasion by non-native species will determine the success of future management projects. We investigated the suitability of self-organizing maps (SOM, neural network) for patterning habitat invasion by exotic fish species at the regional scale (Southwest France), using a binary dataset of species occurrences. The SOM visualization can be used as an analytical tool to bring out relationships between sample locations and biological variables, but in addition the weight of each species in the output of the SOM can be interpreted as its occurrence probability in various geographic areas. After training the SOM with fish presence/absence data, the k-means algorithm helped to derive three major clusters of sites (headwater, montane, and plain areas). Each cluster was divided into two subsets of sites according to non-native fish, because assemblage compositions delineated different geological areas: Pyrenees Mountains, Massif Central Moun...

Research paper thumbnail of Microhabitat use by brown trout (Salmo trutta L.) in a mountain stream affected by peaking-power hydroelectric operations (Pyrénées, Southeast France)

Research paper thumbnail of Community structure and habitat use of 0+ riverine fish-Microhabitat use by 0+ brown trout (Salmo trutta L.) in a mountain stream affected by hydropeaking operations (Pyrenees, Southeast France)

Research paper thumbnail of Gravel pits as new wetlands for the little grebe Tachybaptus ruficollis

Research paper thumbnail of Interaction between fish and waterbird communities: a case study of two gravel pits in south-west France

Research paper thumbnail of Winter microhabitat distribution of coots (Fulica atra L. 1758) on gravel-pit wetlands in the Garonne river floodplain, Southwest France

Research paper thumbnail of Profils Ecologiques Du Vairon(Phoxinus Phoxinus L.), De La Loche Franche(Barbatula Barbatula L.) et Du Goujon(Gobio Gobio L.) a L'Echelle Du Microhabitat Dans Trois Rivieres Pyreneennes

Research paper thumbnail of Microhabitat use by minnow, gudgeon and stone loach in three rivers in southwestern France

Research paper thumbnail of Rotating disk electrodes to assess river biofilm thickness and elasticity

Research paper thumbnail of Warming-induced changes in denitrifier community structure modulate the ability of phototrophic river biofilms to denitrify

Science of The Total Environment, 2014

Research paper thumbnail of Temperature dependence of denitrification in phototrophic river biofilms

Science of The Total Environment, 2012

Research paper thumbnail of Spatial patterns of the biological traits of freshwater fish communities in south-west France

Journal of Fish Biology, 2005

ABSTRACT Spatial patterns in the combinations of biological traits of fish communities were studi... more ABSTRACT Spatial patterns in the combinations of biological traits of fish communities were studied in the Garonne River system (57 000 km2, south-west France). Fish species assemblages were recorded at 554 sampling sites, and the biological traits of species were described using a fuzzy-coding method. A co-inertia analysis of species distributions and biological traits identified some spatial patterns of species trait combinations. Fish species richness progressively increased from up- to downstream sections, and the longitudinal patterns of fish assemblages partitioned the river into clear biogeographic areas, such as the brown trout Salmo trutta(headwater streams), the grayling Thymallus thymallus, the barbel Barbus barbus and the bream Abramis brama zones (most downstream sections), which fitted with Huet's well-known zonation for western European rivers. Only a few biological traits, chiefly related to life-history attributes, significantly influenced the observed fish distributions. Fecundity, potential size, maximum age and reproductive factor increased from headwater to plain reaches. As a theoretical framework for assessing and predicting the functional organization of stream fish communities, spatial variations in species traits can be related to habitat conditions, thus providing explicit spatial schemes that may be useful to the design of both scientific studies and river management.

Research paper thumbnail of Ontogenetic Microhabitat Shifts in the Bullhead,Cottus gobio L.,in a Fast Flowing Stream

International Review of Hydrobiology, 2005

... of good biological quality (see the fish database at http://www.fishbase.org/), eg, having sa... more ... of good biological quality (see the fish database at http://www.fishbase.org/), eg, having salmonid fish and polluosensitive insects (Ephemeroptera, Plecoptera and Trichop-tera). Many factors, closely related to the destruction of physical and hydraulic stream habi-tats by man ...

Research paper thumbnail of Environmental Factors Influencing Local Fish Species Richness and Differences between Hydroregions in South-Western France

International Review of Hydrobiology, 2004

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