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Søren Erik Larsen - One of the best experts on this subject based on the ideXlab platform.
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Physical Habitat Structure in Danish Lowland Streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%) of the 64 000 km of Danish stream network with substantial Habitat degradation as a result. Analyses of physical Habitat Structure in streams, biota, catchment features and regional differences in hydrology, topography and geology have never been carried out in Denmark. Therefore, there is little knowledge of processes, interactions and patterns across the different scales. Physical Habitats, catchment parameters and macroinvertebrates were sampled at 39 sites in three major river systems during summer and winter 1993. In-stream physical conditions and catchment attributes affect the physical Habitat Structure in Danish lowland streams. Local differences in hydrology, land use, catchment topography and soil types correlated to the in-stream physical Habitat parameters. Local differences in hydrology and topography resulted in a separation of the Susa streams with respect to physical Habitats. Mud deposition was pronounced at sites with low discharge and low near-bed current velocity. Low mud cover was primarily associated with streams with high discharge located in pristine catchments. Stability in the streams was therefore closely linked to in-stream deposition of fine sediment. Generally, macroinvertebrate community diversity increased as discharge increased. Mud cover negatively affected macroinvertebrate diversity and EPT taxon richness. Regional physical Habitat Structure and macroinvertebrate community Structure were primarily associated with local variations in hydrology, geology and topography. Low-energy streams were primarily located in the Susa river system and the high-energy streams in the Gudena and Stora river systems, leading to extensive deposition of mud during summer. Streams in the Susa river system generally had lower diversity and species richness compared to the streams in the Gudena and Stora river systems. Hydraulic conditions and substratum dynamics in streams are important when managing lowland streams. This study therefore analysed interactions and parameter correlations between physical Habitats, stream stability and catchment attributes as well as macroinvertebrate community Structure across multiple scales. Copyright © 2004 John Wiley & Sons, Ltd.
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Physical Habitat Structure in Danish lowland streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%)\nof the 64 000 km of Danish stream network with substantial Habitat\ndegradation as a result. Analyses of physical Habitat Structure in\nstreams, biota, catchment features and regional differences in hydrology,\ntopography and geology have never been carried out in Denmark. Therefore,\nthere is little knowledge of processes, interactions and patterns\nacross the different scales. Physical Habitats, catchment parameters\nand macroinvertebrates were sampled at 39 sites in three major river\nsystems during summer and winter 1993. In-stream physical conditions\nand catchment attributes affect the physical Habitat Structure in\nDanish lowland streams. Local differences in hydrology, land use,\ncatchment topography and soil types correlated to the in-stream physical\nHabitat parameters. Local differences in hydrology and topography\nresulted in a separation of the Sus (a) over circle streams with\nrespect to physical Habitats. Mud deposition was pronounced at sites\nwith low discharge and low near-bed current velocity. Low mud cover\nwas primarily associated with streams with high discharge located\nin pristine catchments. Stability in the streams was therefore closely\nlinked to in-stream deposition of fine sediment. Generally, macroinvertebrate\ncommunity diversity increased as discharge increased. Mud cover negatively\naffected macroinvertebrate diversity and EPT taxon richness. Regional\nphysical Habitat Structure and macroinvertebrate community Structure\nwere primarily associated with local variations in hydrology, geology\nand topography. Low-energy streams were primarily located in the\nSus (a) over circle river system and the high-energy streams in the\nGuden (a) over circle and Stor (a) over circle river systems, leading\nto extensive deposition of mud during summer. Streams in the Sus\n(a) over circle river system generally had lower diversity and species\nrichness compared to the streams in the Guden (a) over circle and\nStor (a) over circle river systems. Hydraulic conditions and substratum\ndynamics in streams are important when managing lowland streams.\nThis study therefore analysed interactions and parameter correlations\nbetween physical Habitats, stream stability and catchment attributes\nas well as macroinvertebrate community Structure across multiple\nscales. Copyright (C) 2004 John Wiley Sons, Ltd.
Peter Sunde - One of the best experts on this subject based on the ideXlab platform.
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Seasonal effects of Habitat Structure and weather on the Habitat selection and home range size of a mammal in agricultural landscapes
Landscape Ecology, 2019Co-Authors: Martin Mayer, Wiebke Ullmann, Rebecca Heinrich, Christina Fischer, Niels Blaum, Peter SundeAbstract:Context Human land use intensified over the last century and simultaneously, extreme weather events have become more frequent. However, little is known about the interplay between Habitat Structure, direct short-term weather effects and indirect seasonal effects on animal space use and behavior. Objectives We used the European hare ( Lepus europaeus ) as model to investigate how Habitat Structure and weather conditions affect Habitat selection and home range size, predictors for Habitat quality and energetic requirements. Methods Using > 100,000 GPS positions of 60 hares in three areas in Denmark and Germany, we analyzed Habitat selection and home range size in response to seasonally changing Habitat Structure, measured as vegetation height and agricultural field size, and weather. We compared daily and monthly home ranges to disentangle between direct short-term weather effects and indirect seasonal effects of climate. Results Habitat selection and home range size varied seasonally as a response to changing Habitat Structure, potentially affecting the availability of food and shelter. Overall, Habitat Structure and seasonality were more important in explaining hare Habitat selection and home range size compared to direct weather conditions. Nevertheless, hares adjusted Habitat selection and daily home range size in response to temperature, wind speed and humidity, possibly in response to thermal constrains and predation risk. Conclusions For effective conservation, Habitat heterogeneity should be increased, e.g. by reducing agricultural field sizes and the implementation of set-asides that provide both forage and shelter, especially during the colder months of the year.
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Seasonal effects of Habitat Structure and weather on the Habitat selection and home range size of a mammal in agricultural landscapes
Landscape Ecology, 2019Co-Authors: Martin Mayer, Wiebke Ullmann, Rebecca Heinrich, Christina Fischer, Niels Blaum, Peter SundeAbstract:Human land use intensified over the last century and simultaneously, extreme weather events have become more frequent. However, little is known about the interplay between Habitat Structure, direct short-term weather effects and indirect seasonal effects on animal space use and behavior. We used the European hare (Lepus europaeus) as model to investigate how Habitat Structure and weather conditions affect Habitat selection and home range size, predictors for Habitat quality and energetic requirements. Using > 100,000 GPS positions of 60 hares in three areas in Denmark and Germany, we analyzed Habitat selection and home range size in response to seasonally changing Habitat Structure, measured as vegetation height and agricultural field size, and weather. We compared daily and monthly home ranges to disentangle between direct short-term weather effects and indirect seasonal effects of climate. Habitat selection and home range size varied seasonally as a response to changing Habitat Structure, potentially affecting the availability of food and shelter. Overall, Habitat Structure and seasonality were more important in explaining hare Habitat selection and home range size compared to direct weather conditions. Nevertheless, hares adjusted Habitat selection and daily home range size in response to temperature, wind speed and humidity, possibly in response to thermal constrains and predation risk. For effective conservation, Habitat heterogeneity should be increased, e.g. by reducing agricultural field sizes and the implementation of set-asides that provide both forage and shelter, especially during the colder months of the year.
Morten Lauge Pedersen - One of the best experts on this subject based on the ideXlab platform.
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Physical Habitat Structure in Danish Lowland Streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%) of the 64 000 km of Danish stream network with substantial Habitat degradation as a result. Analyses of physical Habitat Structure in streams, biota, catchment features and regional differences in hydrology, topography and geology have never been carried out in Denmark. Therefore, there is little knowledge of processes, interactions and patterns across the different scales. Physical Habitats, catchment parameters and macroinvertebrates were sampled at 39 sites in three major river systems during summer and winter 1993. In-stream physical conditions and catchment attributes affect the physical Habitat Structure in Danish lowland streams. Local differences in hydrology, land use, catchment topography and soil types correlated to the in-stream physical Habitat parameters. Local differences in hydrology and topography resulted in a separation of the Susa streams with respect to physical Habitats. Mud deposition was pronounced at sites with low discharge and low near-bed current velocity. Low mud cover was primarily associated with streams with high discharge located in pristine catchments. Stability in the streams was therefore closely linked to in-stream deposition of fine sediment. Generally, macroinvertebrate community diversity increased as discharge increased. Mud cover negatively affected macroinvertebrate diversity and EPT taxon richness. Regional physical Habitat Structure and macroinvertebrate community Structure were primarily associated with local variations in hydrology, geology and topography. Low-energy streams were primarily located in the Susa river system and the high-energy streams in the Gudena and Stora river systems, leading to extensive deposition of mud during summer. Streams in the Susa river system generally had lower diversity and species richness compared to the streams in the Gudena and Stora river systems. Hydraulic conditions and substratum dynamics in streams are important when managing lowland streams. This study therefore analysed interactions and parameter correlations between physical Habitats, stream stability and catchment attributes as well as macroinvertebrate community Structure across multiple scales. Copyright © 2004 John Wiley & Sons, Ltd.
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Physical Habitat Structure in Danish lowland streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%)\nof the 64 000 km of Danish stream network with substantial Habitat\ndegradation as a result. Analyses of physical Habitat Structure in\nstreams, biota, catchment features and regional differences in hydrology,\ntopography and geology have never been carried out in Denmark. Therefore,\nthere is little knowledge of processes, interactions and patterns\nacross the different scales. Physical Habitats, catchment parameters\nand macroinvertebrates were sampled at 39 sites in three major river\nsystems during summer and winter 1993. In-stream physical conditions\nand catchment attributes affect the physical Habitat Structure in\nDanish lowland streams. Local differences in hydrology, land use,\ncatchment topography and soil types correlated to the in-stream physical\nHabitat parameters. Local differences in hydrology and topography\nresulted in a separation of the Sus (a) over circle streams with\nrespect to physical Habitats. Mud deposition was pronounced at sites\nwith low discharge and low near-bed current velocity. Low mud cover\nwas primarily associated with streams with high discharge located\nin pristine catchments. Stability in the streams was therefore closely\nlinked to in-stream deposition of fine sediment. Generally, macroinvertebrate\ncommunity diversity increased as discharge increased. Mud cover negatively\naffected macroinvertebrate diversity and EPT taxon richness. Regional\nphysical Habitat Structure and macroinvertebrate community Structure\nwere primarily associated with local variations in hydrology, geology\nand topography. Low-energy streams were primarily located in the\nSus (a) over circle river system and the high-energy streams in the\nGuden (a) over circle and Stor (a) over circle river systems, leading\nto extensive deposition of mud during summer. Streams in the Sus\n(a) over circle river system generally had lower diversity and species\nrichness compared to the streams in the Guden (a) over circle and\nStor (a) over circle river systems. Hydraulic conditions and substratum\ndynamics in streams are important when managing lowland streams.\nThis study therefore analysed interactions and parameter correlations\nbetween physical Habitats, stream stability and catchment attributes\nas well as macroinvertebrate community Structure across multiple\nscales. Copyright (C) 2004 John Wiley Sons, Ltd.
Martin Mayer - One of the best experts on this subject based on the ideXlab platform.
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Seasonal effects of Habitat Structure and weather on the Habitat selection and home range size of a mammal in agricultural landscapes
Landscape Ecology, 2019Co-Authors: Martin Mayer, Wiebke Ullmann, Rebecca Heinrich, Christina Fischer, Niels Blaum, Peter SundeAbstract:Context Human land use intensified over the last century and simultaneously, extreme weather events have become more frequent. However, little is known about the interplay between Habitat Structure, direct short-term weather effects and indirect seasonal effects on animal space use and behavior. Objectives We used the European hare ( Lepus europaeus ) as model to investigate how Habitat Structure and weather conditions affect Habitat selection and home range size, predictors for Habitat quality and energetic requirements. Methods Using > 100,000 GPS positions of 60 hares in three areas in Denmark and Germany, we analyzed Habitat selection and home range size in response to seasonally changing Habitat Structure, measured as vegetation height and agricultural field size, and weather. We compared daily and monthly home ranges to disentangle between direct short-term weather effects and indirect seasonal effects of climate. Results Habitat selection and home range size varied seasonally as a response to changing Habitat Structure, potentially affecting the availability of food and shelter. Overall, Habitat Structure and seasonality were more important in explaining hare Habitat selection and home range size compared to direct weather conditions. Nevertheless, hares adjusted Habitat selection and daily home range size in response to temperature, wind speed and humidity, possibly in response to thermal constrains and predation risk. Conclusions For effective conservation, Habitat heterogeneity should be increased, e.g. by reducing agricultural field sizes and the implementation of set-asides that provide both forage and shelter, especially during the colder months of the year.
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Seasonal effects of Habitat Structure and weather on the Habitat selection and home range size of a mammal in agricultural landscapes
Landscape Ecology, 2019Co-Authors: Martin Mayer, Wiebke Ullmann, Rebecca Heinrich, Christina Fischer, Niels Blaum, Peter SundeAbstract:Human land use intensified over the last century and simultaneously, extreme weather events have become more frequent. However, little is known about the interplay between Habitat Structure, direct short-term weather effects and indirect seasonal effects on animal space use and behavior. We used the European hare (Lepus europaeus) as model to investigate how Habitat Structure and weather conditions affect Habitat selection and home range size, predictors for Habitat quality and energetic requirements. Using > 100,000 GPS positions of 60 hares in three areas in Denmark and Germany, we analyzed Habitat selection and home range size in response to seasonally changing Habitat Structure, measured as vegetation height and agricultural field size, and weather. We compared daily and monthly home ranges to disentangle between direct short-term weather effects and indirect seasonal effects of climate. Habitat selection and home range size varied seasonally as a response to changing Habitat Structure, potentially affecting the availability of food and shelter. Overall, Habitat Structure and seasonality were more important in explaining hare Habitat selection and home range size compared to direct weather conditions. Nevertheless, hares adjusted Habitat selection and daily home range size in response to temperature, wind speed and humidity, possibly in response to thermal constrains and predation risk. For effective conservation, Habitat heterogeneity should be increased, e.g. by reducing agricultural field sizes and the implementation of set-asides that provide both forage and shelter, especially during the colder months of the year.
Nikolai Friberg - One of the best experts on this subject based on the ideXlab platform.
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Physical Habitat Structure in Danish Lowland Streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%) of the 64 000 km of Danish stream network with substantial Habitat degradation as a result. Analyses of physical Habitat Structure in streams, biota, catchment features and regional differences in hydrology, topography and geology have never been carried out in Denmark. Therefore, there is little knowledge of processes, interactions and patterns across the different scales. Physical Habitats, catchment parameters and macroinvertebrates were sampled at 39 sites in three major river systems during summer and winter 1993. In-stream physical conditions and catchment attributes affect the physical Habitat Structure in Danish lowland streams. Local differences in hydrology, land use, catchment topography and soil types correlated to the in-stream physical Habitat parameters. Local differences in hydrology and topography resulted in a separation of the Susa streams with respect to physical Habitats. Mud deposition was pronounced at sites with low discharge and low near-bed current velocity. Low mud cover was primarily associated with streams with high discharge located in pristine catchments. Stability in the streams was therefore closely linked to in-stream deposition of fine sediment. Generally, macroinvertebrate community diversity increased as discharge increased. Mud cover negatively affected macroinvertebrate diversity and EPT taxon richness. Regional physical Habitat Structure and macroinvertebrate community Structure were primarily associated with local variations in hydrology, geology and topography. Low-energy streams were primarily located in the Susa river system and the high-energy streams in the Gudena and Stora river systems, leading to extensive deposition of mud during summer. Streams in the Susa river system generally had lower diversity and species richness compared to the streams in the Gudena and Stora river systems. Hydraulic conditions and substratum dynamics in streams are important when managing lowland streams. This study therefore analysed interactions and parameter correlations between physical Habitats, stream stability and catchment attributes as well as macroinvertebrate community Structure across multiple scales. Copyright © 2004 John Wiley & Sons, Ltd.
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Physical Habitat Structure in Danish lowland streams
River Research and Applications, 2004Co-Authors: Morten Lauge Pedersen, Nikolai Friberg, Søren Erik LarsenAbstract:Dredging or channelization has physically modified the majority (90%)\nof the 64 000 km of Danish stream network with substantial Habitat\ndegradation as a result. Analyses of physical Habitat Structure in\nstreams, biota, catchment features and regional differences in hydrology,\ntopography and geology have never been carried out in Denmark. Therefore,\nthere is little knowledge of processes, interactions and patterns\nacross the different scales. Physical Habitats, catchment parameters\nand macroinvertebrates were sampled at 39 sites in three major river\nsystems during summer and winter 1993. In-stream physical conditions\nand catchment attributes affect the physical Habitat Structure in\nDanish lowland streams. Local differences in hydrology, land use,\ncatchment topography and soil types correlated to the in-stream physical\nHabitat parameters. Local differences in hydrology and topography\nresulted in a separation of the Sus (a) over circle streams with\nrespect to physical Habitats. Mud deposition was pronounced at sites\nwith low discharge and low near-bed current velocity. Low mud cover\nwas primarily associated with streams with high discharge located\nin pristine catchments. Stability in the streams was therefore closely\nlinked to in-stream deposition of fine sediment. Generally, macroinvertebrate\ncommunity diversity increased as discharge increased. Mud cover negatively\naffected macroinvertebrate diversity and EPT taxon richness. Regional\nphysical Habitat Structure and macroinvertebrate community Structure\nwere primarily associated with local variations in hydrology, geology\nand topography. Low-energy streams were primarily located in the\nSus (a) over circle river system and the high-energy streams in the\nGuden (a) over circle and Stor (a) over circle river systems, leading\nto extensive deposition of mud during summer. Streams in the Sus\n(a) over circle river system generally had lower diversity and species\nrichness compared to the streams in the Guden (a) over circle and\nStor (a) over circle river systems. Hydraulic conditions and substratum\ndynamics in streams are important when managing lowland streams.\nThis study therefore analysed interactions and parameter correlations\nbetween physical Habitats, stream stability and catchment attributes\nas well as macroinvertebrate community Structure across multiple\nscales. Copyright (C) 2004 John Wiley Sons, Ltd.
