Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R. and Donohue, I.
Journal: Journal of Animal Ecology
Volume: 85
Issue: 4
Pages: 1098-1107
eISSN: 1365-2656
DOI: 10.1111/1365-2656.12533
Abstract:Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary niche breadths of invasive species. We used a combination of field experiments and field surveys to examine the impacts of competition with a functionally similar native crab species on the population densities, growth rates and diet of the globally widespread invasive red swamp crayfish in an African river ecosystem. The presence of native crabs triggered significant dietary niche constriction within the invasive crayfish population. Further, growth rates of both species were reduced significantly, and by a similar extent, in the presence of one another. In spite of this, crayfish maintained positive growth rates in the presence of crabs, whereas crabs lost mass in the presence of crayfish. Consequently, over the 3-year duration of the study, crab abundance declined at those sites invaded by the crayfish, becoming locally extinct at one. The invasive crayfish had a dramatic effect on ecosystem structure and functioning, halving benthic invertebrate densities and increasing decomposition rates fourfold compared to the crabs. This indicates that replacement of native crabs by invasive crayfish likely alters the structure and functioning of African river ecosystems significantly. This study provides a novel example of the constriction of the dietary niche of a successful invasive population in the presence of competition from a functionally similar native species. This finding highlights the importance of considering both environmental and ecological contexts in order to predict and manage the impacts of invasive species on ecosystems.
https://eprints.bournemouth.ac.uk/23372/
Source: Scopus
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R., Donohue, I. and Dunn, A.
Journal: Journal of Animal Ecology
Volume: 85
Issue: 4
Pages: 1098-1107
eISSN: 1365-2656
ISSN: 0021-8790
DOI: 10.1111/1365-2656.12533
Abstract:© 2016 The Authors. Journal of Animal Ecology © 2016 British Ecological SocietyInvasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary niche breadths of invasive species. We used a combination of field experiments and field surveys to examine the impacts of competition with a functionally similar native crab species on the population densities, growth rates and diet of the globally widespread invasive red swamp crayfish in an African river ecosystem. The presence of native crabs triggered significant dietary niche constriction within the invasive crayfish population. Further, growth rates of both species were reduced significantly, and by a similar extent, in the presence of one another. In spite of this, crayfish maintained positive growth rates in the presence of crabs, whereas crabs lost mass in the presence of crayfish. Consequently, over the 3-year duration of the study, crab abundance declined at those sites invaded by the crayfish, becoming locally extinct at one. The invasive crayfish had a dramatic effect on ecosystem structure and functioning, halving benthic invertebrate densities and increasing decomposition rates fourfold compared to the crabs. This indicates that replacement of native crabs by invasive crayfish likely alters the structure and functioning of African river ecosystems significantly. This study provides a novel example of the constriction of the dietary niche of a successful invasive population in the presence of competition from a functionally similar native species. This finding highlights the importance of considering both environmental and ecological contexts in order to predict and manage the impacts of invasive species on ecosystems.
https://eprints.bournemouth.ac.uk/23372/
Source: Scopus
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods.
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R. and Donohue, I.
Journal: J Anim Ecol
Volume: 85
Issue: 4
Pages: 1098-1107
eISSN: 1365-2656
DOI: 10.1111/1365-2656.12533
Abstract:Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary niche breadths of invasive species. We used a combination of field experiments and field surveys to examine the impacts of competition with a functionally similar native crab species on the population densities, growth rates and diet of the globally widespread invasive red swamp crayfish in an African river ecosystem. The presence of native crabs triggered significant dietary niche constriction within the invasive crayfish population. Further, growth rates of both species were reduced significantly, and by a similar extent, in the presence of one another. In spite of this, crayfish maintained positive growth rates in the presence of crabs, whereas crabs lost mass in the presence of crayfish. Consequently, over the 3-year duration of the study, crab abundance declined at those sites invaded by the crayfish, becoming locally extinct at one. The invasive crayfish had a dramatic effect on ecosystem structure and functioning, halving benthic invertebrate densities and increasing decomposition rates fourfold compared to the crabs. This indicates that replacement of native crabs by invasive crayfish likely alters the structure and functioning of African river ecosystems significantly. This study provides a novel example of the constriction of the dietary niche of a successful invasive population in the presence of competition from a functionally similar native species. This finding highlights the importance of considering both environmental and ecological contexts in order to predict and manage the impacts of invasive species on ecosystems.
https://eprints.bournemouth.ac.uk/23372/
Source: PubMed
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R. and Donohue, I.
Journal: JOURNAL OF ANIMAL ECOLOGY
Volume: 85
Issue: 4
Pages: 1098-1107
eISSN: 1365-2656
ISSN: 0021-8790
DOI: 10.1111/1365-2656.12533
https://eprints.bournemouth.ac.uk/23372/
Source: Web of Science (Lite)
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J. and Donohue, I.
Journal: Journal of Animal Ecology
Publisher: Wiley
ISSN: 1365-2656
https://eprints.bournemouth.ac.uk/23372/
Source: Manual
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods.
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R. and Donohue, I.
Journal: The Journal of animal ecology
Volume: 85
Issue: 4
Pages: 1098-1107
eISSN: 1365-2656
ISSN: 0021-8790
DOI: 10.1111/1365-2656.12533
Abstract:Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary niche breadths of invasive species. We used a combination of field experiments and field surveys to examine the impacts of competition with a functionally similar native crab species on the population densities, growth rates and diet of the globally widespread invasive red swamp crayfish in an African river ecosystem. The presence of native crabs triggered significant dietary niche constriction within the invasive crayfish population. Further, growth rates of both species were reduced significantly, and by a similar extent, in the presence of one another. In spite of this, crayfish maintained positive growth rates in the presence of crabs, whereas crabs lost mass in the presence of crayfish. Consequently, over the 3-year duration of the study, crab abundance declined at those sites invaded by the crayfish, becoming locally extinct at one. The invasive crayfish had a dramatic effect on ecosystem structure and functioning, halving benthic invertebrate densities and increasing decomposition rates fourfold compared to the crabs. This indicates that replacement of native crabs by invasive crayfish likely alters the structure and functioning of African river ecosystems significantly. This study provides a novel example of the constriction of the dietary niche of a successful invasive population in the presence of competition from a functionally similar native species. This finding highlights the importance of considering both environmental and ecological contexts in order to predict and manage the impacts of invasive species on ecosystems.
https://eprints.bournemouth.ac.uk/23372/
Source: Europe PubMed Central
Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Authors: Jackson, M.C., Grey, J., Miller, K., Britton, J.R. and Donohue, I.
Journal: Journal of Animal Ecology
Volume: 85
Issue: 4
Pages: 1098-1107
ISSN: 1365-2656
Abstract:1.Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes.
Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary niche breadths of invasive species.
2. We used a combination of field experiments and field surveys to examine the impacts of competition with a functionally similar native crab species on the population densities, growth rates and diet of the globally widespread invasive red swamp crayfish in an African river ecosystem.
3. The presence of native crabs triggered significant dietary niche constriction within the invasive crayfish population. Further, growth rates of both species were reduced significantly, and by a similar extent, in the presence of one another. In spite of this,crayfish maintained positive growth rates in the presence of crabs, whereas crabs lost mass in the presence of crayfish. Consequently, over the three year duration of the study, crab abundance declined at those sites invaded by the crayfish, becoming locally extinct at one.
4. The invasive crayfish had a dramatic effect on ecosystem structure and functioning, halving benthic invertebrate densities and increasing decomposition rates four-fold compared to the crabs. This indicates that replacement of native crabs by invasive crayfish likely alters the structure and functioning of African river ecosystems significantly.
5. This study provides a novel example of the constriction of the dietary niche of a successful invasive population in the presence of competition from a functionally similar native species. This finding highlights the importance of considering both environmental and ecological contexts in order to predict and manage the impacts of invasive species on ecosystems.
https://eprints.bournemouth.ac.uk/23372/
Source: BURO EPrints