The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Matthieu Le Corre - One of the best experts on this subject based on the ideXlab platform.
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Variability of Resource Partitioning in sympatric tropical boobies
Marine Ecology Progress Series, 2011Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Inter- and intraspecific competition can lead to Resource Partitioning in sympatric species, processes likely affected by environmental productivity and population size. We investi- gated the foraging behaviour and diet of masked (Sula dactylatra) and red-footed (S. sula) boobies at Tromelin Island, western Indian Ocean, to examine the role of Resource Partitioning in the for- aging strategies of these sympatric species in an extreme oligotrophic environment. We compared our results to published studies with differing environmental conditions or population sizes. We used GPS loggers and Argos transmitters to track foraging movements and used time-depth recorders to estimate dive depths. Masked boobies travelled further and at faster rates than red- footed boobies, and sexes did not differ in foraging behaviour. Based on randomization tests, the foraging range of each species (95% utilization distribution; UD) overlapped significantly. How- ever, at core foraging areas (50% and 25% UD), interspecific segregation was greater than expected by chance alone. No intraspecific spatial segregation was detected between sexes. Envi- ronmental characteristics of area-restricted search zones differed between species, but not sexes; masked boobies utilized warmer, deeper, and less windy oceanic environments than red-footed boobies. Masked boobies attained greater diving depths than red-footed boobies and consumed primarily flying fish, whereas red-footed boobies consumed mostly squid. Red-footed and masked boobies breeding in the extreme oligotrophic environment near Tromelin demonstrated greater dietary Partitioning differences in foraging ranges compared to a less oligotrophic environment. This suggests that environmental productivity may play a role in processes of Resource partition- ing in these sympatric species.
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Evidence of Resource Partitioning in sympatric tropical boobies
2010Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Oral presentation about Evidence of Resource Partitioning in sympatric tropical boobies
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Stable isotopes document Resource Partitioning and seasonal changes in tropic niche of subantarctic and tropical seabirds
2008Co-Authors: Yves Cherel, Henri Weimerskirch, Audrey Jaeger, Matthieu Le CorreAbstract:Oral presentation about Stable isotopes document Resource Partitioning and seasonal changes in tropic niche of subantarctic and tropical seabirds
Christian Laforsch - One of the best experts on this subject based on the ideXlab platform.
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Shell Resource Partitioning as a mechanism of coexistence in two co-occurring terrestrial hermit crab species
BMC Ecology, 2020Co-Authors: Sebastian Steibl, Christian LaforschAbstract:Background Coexistence is enabled by ecological differentiation of the co-occurring species. One possible mechanism thereby is Resource Partitioning, where each species utilizes a distinct subset of the most limited Resource. This Resource Partitioning is difficult to investigate using empirical research in nature, as only few species are primarily limited by solely one Resource, rather than a combination of multiple factors. One exception are the shell-dwelling hermit crabs, which are known to be limited under natural conditions and in suitable habitats primarily by the availability of gastropod shells. In the present study, we used two co-occurring terrestrial hermit crab species, Coenobita rugosus and C. perlatus , to investigate how Resource Partitioning is realized in nature and whether it could be a driver of coexistence. Results Field sampling of eleven separated hermit crab populations showed that the two co-occurring hermit crab species inhabit the same beach habitat but utilize a distinct subset of the shell Resource. Preference experiments and principal component analysis of the shell morphometric data thereby revealed that the observed utilization patterns arise out of different intrinsic preferences towards two distinct shell shapes. While C. rugosus displayed a preference towards a short and globose shell morphology, C. perlatus showed preferences towards an elongated shell morphology with narrow aperture. Conclusion The two terrestrial hermit crab species occur in the same habitat but have evolved different preferences towards distinct subsets of the limiting shell Resource. Resource Partitioning might therefore be the main driver of their ecological differentiation, which ultimately allowed these co-occurring species to coexist in their environment. As the preferred shell morphology of C. rugosus maximizes reproductive output at the expense of protection, while the preferred shell morphology of C. perlatus maximizes protection against predation at the expense of reproductive output, shell Resource Partitioning might reflect different strategies to respond to the same set of selective pressures occurring in beach habitats. This work offers empirical support for the competitive exclusion principle-hypothesis and demonstrates that hermit crabs are an ideal model organism to investigate Resource Partitioning in natural populations.
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shell Resource Partitioning as a mechanism of coexistence in two co occurring terrestrial hermit crab species
BMC Ecology, 2020Co-Authors: Sebastian Steibl, Christian LaforschAbstract:Coexistence is enabled by ecological differentiation of the co-occurring species. One possible mechanism thereby is Resource Partitioning, where each species utilizes a distinct subset of the most limited Resource. This Resource Partitioning is difficult to investigate using empirical research in nature, as only few species are primarily limited by solely one Resource, rather than a combination of multiple factors. One exception are the shell-dwelling hermit crabs, which are known to be limited under natural conditions and in suitable habitats primarily by the availability of gastropod shells. In the present study, we used two co-occurring terrestrial hermit crab species, Coenobita rugosus and C. perlatus, to investigate how Resource Partitioning is realized in nature and whether it could be a driver of coexistence. Field sampling of eleven separated hermit crab populations showed that the two co-occurring hermit crab species inhabit the same beach habitat but utilize a distinct subset of the shell Resource. Preference experiments and principal component analysis of the shell morphometric data thereby revealed that the observed utilization patterns arise out of different intrinsic preferences towards two distinct shell shapes. While C. rugosus displayed a preference towards a short and globose shell morphology, C. perlatus showed preferences towards an elongated shell morphology with narrow aperture. The two terrestrial hermit crab species occur in the same habitat but have evolved different preferences towards distinct subsets of the limiting shell Resource. Resource Partitioning might therefore be the main driver of their ecological differentiation, which ultimately allowed these co-occurring species to coexist in their environment. As the preferred shell morphology of C. rugosus maximizes reproductive output at the expense of protection, while the preferred shell morphology of C. perlatus maximizes protection against predation at the expense of reproductive output, shell Resource Partitioning might reflect different strategies to respond to the same set of selective pressures occurring in beach habitats. This work offers empirical support for the competitive exclusion principle-hypothesis and demonstrates that hermit crabs are an ideal model organism to investigate Resource Partitioning in natural populations.
Sebastian Steibl - One of the best experts on this subject based on the ideXlab platform.
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Shell Resource Partitioning as a mechanism of coexistence in two co-occurring terrestrial hermit crab species
BMC Ecology, 2020Co-Authors: Sebastian Steibl, Christian LaforschAbstract:Background Coexistence is enabled by ecological differentiation of the co-occurring species. One possible mechanism thereby is Resource Partitioning, where each species utilizes a distinct subset of the most limited Resource. This Resource Partitioning is difficult to investigate using empirical research in nature, as only few species are primarily limited by solely one Resource, rather than a combination of multiple factors. One exception are the shell-dwelling hermit crabs, which are known to be limited under natural conditions and in suitable habitats primarily by the availability of gastropod shells. In the present study, we used two co-occurring terrestrial hermit crab species, Coenobita rugosus and C. perlatus , to investigate how Resource Partitioning is realized in nature and whether it could be a driver of coexistence. Results Field sampling of eleven separated hermit crab populations showed that the two co-occurring hermit crab species inhabit the same beach habitat but utilize a distinct subset of the shell Resource. Preference experiments and principal component analysis of the shell morphometric data thereby revealed that the observed utilization patterns arise out of different intrinsic preferences towards two distinct shell shapes. While C. rugosus displayed a preference towards a short and globose shell morphology, C. perlatus showed preferences towards an elongated shell morphology with narrow aperture. Conclusion The two terrestrial hermit crab species occur in the same habitat but have evolved different preferences towards distinct subsets of the limiting shell Resource. Resource Partitioning might therefore be the main driver of their ecological differentiation, which ultimately allowed these co-occurring species to coexist in their environment. As the preferred shell morphology of C. rugosus maximizes reproductive output at the expense of protection, while the preferred shell morphology of C. perlatus maximizes protection against predation at the expense of reproductive output, shell Resource Partitioning might reflect different strategies to respond to the same set of selective pressures occurring in beach habitats. This work offers empirical support for the competitive exclusion principle-hypothesis and demonstrates that hermit crabs are an ideal model organism to investigate Resource Partitioning in natural populations.
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shell Resource Partitioning as a mechanism of coexistence in two co occurring terrestrial hermit crab species
BMC Ecology, 2020Co-Authors: Sebastian Steibl, Christian LaforschAbstract:Coexistence is enabled by ecological differentiation of the co-occurring species. One possible mechanism thereby is Resource Partitioning, where each species utilizes a distinct subset of the most limited Resource. This Resource Partitioning is difficult to investigate using empirical research in nature, as only few species are primarily limited by solely one Resource, rather than a combination of multiple factors. One exception are the shell-dwelling hermit crabs, which are known to be limited under natural conditions and in suitable habitats primarily by the availability of gastropod shells. In the present study, we used two co-occurring terrestrial hermit crab species, Coenobita rugosus and C. perlatus, to investigate how Resource Partitioning is realized in nature and whether it could be a driver of coexistence. Field sampling of eleven separated hermit crab populations showed that the two co-occurring hermit crab species inhabit the same beach habitat but utilize a distinct subset of the shell Resource. Preference experiments and principal component analysis of the shell morphometric data thereby revealed that the observed utilization patterns arise out of different intrinsic preferences towards two distinct shell shapes. While C. rugosus displayed a preference towards a short and globose shell morphology, C. perlatus showed preferences towards an elongated shell morphology with narrow aperture. The two terrestrial hermit crab species occur in the same habitat but have evolved different preferences towards distinct subsets of the limiting shell Resource. Resource Partitioning might therefore be the main driver of their ecological differentiation, which ultimately allowed these co-occurring species to coexist in their environment. As the preferred shell morphology of C. rugosus maximizes reproductive output at the expense of protection, while the preferred shell morphology of C. perlatus maximizes protection against predation at the expense of reproductive output, shell Resource Partitioning might reflect different strategies to respond to the same set of selective pressures occurring in beach habitats. This work offers empirical support for the competitive exclusion principle-hypothesis and demonstrates that hermit crabs are an ideal model organism to investigate Resource Partitioning in natural populations.
Michelle A. Kappes - One of the best experts on this subject based on the ideXlab platform.
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Variability of Resource Partitioning in sympatric tropical boobies
Marine Ecology Progress Series, 2011Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Inter- and intraspecific competition can lead to Resource Partitioning in sympatric species, processes likely affected by environmental productivity and population size. We investi- gated the foraging behaviour and diet of masked (Sula dactylatra) and red-footed (S. sula) boobies at Tromelin Island, western Indian Ocean, to examine the role of Resource Partitioning in the for- aging strategies of these sympatric species in an extreme oligotrophic environment. We compared our results to published studies with differing environmental conditions or population sizes. We used GPS loggers and Argos transmitters to track foraging movements and used time-depth recorders to estimate dive depths. Masked boobies travelled further and at faster rates than red- footed boobies, and sexes did not differ in foraging behaviour. Based on randomization tests, the foraging range of each species (95% utilization distribution; UD) overlapped significantly. How- ever, at core foraging areas (50% and 25% UD), interspecific segregation was greater than expected by chance alone. No intraspecific spatial segregation was detected between sexes. Envi- ronmental characteristics of area-restricted search zones differed between species, but not sexes; masked boobies utilized warmer, deeper, and less windy oceanic environments than red-footed boobies. Masked boobies attained greater diving depths than red-footed boobies and consumed primarily flying fish, whereas red-footed boobies consumed mostly squid. Red-footed and masked boobies breeding in the extreme oligotrophic environment near Tromelin demonstrated greater dietary Partitioning differences in foraging ranges compared to a less oligotrophic environment. This suggests that environmental productivity may play a role in processes of Resource partition- ing in these sympatric species.
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Evidence of Resource Partitioning in sympatric tropical boobies
2010Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Oral presentation about Evidence of Resource Partitioning in sympatric tropical boobies
Henri Weimerskirch - One of the best experts on this subject based on the ideXlab platform.
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Variability of Resource Partitioning in sympatric tropical boobies
Marine Ecology Progress Series, 2011Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Inter- and intraspecific competition can lead to Resource Partitioning in sympatric species, processes likely affected by environmental productivity and population size. We investi- gated the foraging behaviour and diet of masked (Sula dactylatra) and red-footed (S. sula) boobies at Tromelin Island, western Indian Ocean, to examine the role of Resource Partitioning in the for- aging strategies of these sympatric species in an extreme oligotrophic environment. We compared our results to published studies with differing environmental conditions or population sizes. We used GPS loggers and Argos transmitters to track foraging movements and used time-depth recorders to estimate dive depths. Masked boobies travelled further and at faster rates than red- footed boobies, and sexes did not differ in foraging behaviour. Based on randomization tests, the foraging range of each species (95% utilization distribution; UD) overlapped significantly. How- ever, at core foraging areas (50% and 25% UD), interspecific segregation was greater than expected by chance alone. No intraspecific spatial segregation was detected between sexes. Envi- ronmental characteristics of area-restricted search zones differed between species, but not sexes; masked boobies utilized warmer, deeper, and less windy oceanic environments than red-footed boobies. Masked boobies attained greater diving depths than red-footed boobies and consumed primarily flying fish, whereas red-footed boobies consumed mostly squid. Red-footed and masked boobies breeding in the extreme oligotrophic environment near Tromelin demonstrated greater dietary Partitioning differences in foraging ranges compared to a less oligotrophic environment. This suggests that environmental productivity may play a role in processes of Resource partition- ing in these sympatric species.
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Evidence of Resource Partitioning in sympatric tropical boobies
2010Co-Authors: Michelle A. Kappes, Henri Weimerskirch, David Pinaud, Matthieu Le CorreAbstract:Oral presentation about Evidence of Resource Partitioning in sympatric tropical boobies
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Stable isotopes document Resource Partitioning and seasonal changes in tropic niche of subantarctic and tropical seabirds
2008Co-Authors: Yves Cherel, Henri Weimerskirch, Audrey Jaeger, Matthieu Le CorreAbstract:Oral presentation about Stable isotopes document Resource Partitioning and seasonal changes in tropic niche of subantarctic and tropical seabirds
