The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae
Understanding how the density and spatial arrangement of invaders is critical to developing management strategies of pest species. The Pacific oyster, Crassostrea gigas, has been translocated around the world for aquaculture and in many instances has established wild populations. Relative to other s...
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Online Access: | https://doi.org/10.1002/ece3.872 |
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ftunivscoast:usc:22589 2023-05-15T15:57:54+02:00 The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae Wilkie, E M Bishop, M J O'Connor, W A 2013 https://doi.org/10.1002/ece3.872 eng eng John Wiley & Sons Ltd. usc:22589 URN:ISSN: 2045-7758 Copyright © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.This is an open access article under the term s of the Creative Commons At tribution License, which permits use,distribution and reproduction in any medium, provided the original work is properly cited. FoR 0602 (Ecology) FoR 0603 (Evolutionary Biology) crassostrea gigas density filtration spatial arrangement surface area Journal Article 2013 ftunivscoast https://doi.org/10.1002/ece3.872 2018-07-29T23:51:54Z Understanding how the density and spatial arrangement of invaders is critical to developing management strategies of pest species. The Pacific oyster, Crassostrea gigas, has been translocated around the world for aquaculture and in many instances has established wild populations. Relative to other species of bivalve, it displays rapid suspension feeding, which may cause mortality of pelagic invertebrate larvae. We compared the effect on settlement of Sydney rock oyster, Saccostrea glomerata, larvae of manipulating the spatial arrangement and density of native S. glomerata, and non-native C. gigas. We hypothesized that while manipulations of dead oysters would reveal the same positive relationship between attachment surface area and S. glomerata settlement between the two species, manipulations of live oysters would reveal differing density-dependent effects between the native and non-native oyster. In the field, whether oysters were live or dead, more larvae settled on C. gigas than S. glomerata when substrate was arranged in monospecific clumps. When, however, the two species were interspersed, there were no differences in larval settlement between them. By contrast, in aquaria simulating a higher effective oyster density, more larvae settled on live S. glomerata than C. gigas. When C. gigas was prevented from suspension feeding, settlement of larvae on C. gigas was enhanced. By contrast, settlement was similar between the two species when dead. While the presently low densities of the invasive oyster C. gigas may enhance S. glomerata larval settlement in east Australian estuaries, future increases in densities could produce negative impacts on native oyster settlement. Synthesis and applications: Our study has shown that both the spatial arrangement and density of invaders can influence their impact. Hence, management strategies aimed at preventing invasive populations reaching damaging sizes should not only consider the threshold density at which impacts exceed some acceptable limit, but also how patch formation modifies this. © 2013 The Authors. Article in Journal/Newspaper Crassostrea gigas Pacific oyster University of the Sunshine Coast, Queensland, Australia: COAST Research Database Pacific Ecology and Evolution 3 15 4851 4860 |
institution |
Open Polar |
collection |
University of the Sunshine Coast, Queensland, Australia: COAST Research Database |
op_collection_id |
ftunivscoast |
language |
English |
topic |
FoR 0602 (Ecology) FoR 0603 (Evolutionary Biology) crassostrea gigas density filtration spatial arrangement surface area |
spellingShingle |
FoR 0602 (Ecology) FoR 0603 (Evolutionary Biology) crassostrea gigas density filtration spatial arrangement surface area Wilkie, E M Bishop, M J O'Connor, W A The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
topic_facet |
FoR 0602 (Ecology) FoR 0603 (Evolutionary Biology) crassostrea gigas density filtration spatial arrangement surface area |
description |
Understanding how the density and spatial arrangement of invaders is critical to developing management strategies of pest species. The Pacific oyster, Crassostrea gigas, has been translocated around the world for aquaculture and in many instances has established wild populations. Relative to other species of bivalve, it displays rapid suspension feeding, which may cause mortality of pelagic invertebrate larvae. We compared the effect on settlement of Sydney rock oyster, Saccostrea glomerata, larvae of manipulating the spatial arrangement and density of native S. glomerata, and non-native C. gigas. We hypothesized that while manipulations of dead oysters would reveal the same positive relationship between attachment surface area and S. glomerata settlement between the two species, manipulations of live oysters would reveal differing density-dependent effects between the native and non-native oyster. In the field, whether oysters were live or dead, more larvae settled on C. gigas than S. glomerata when substrate was arranged in monospecific clumps. When, however, the two species were interspersed, there were no differences in larval settlement between them. By contrast, in aquaria simulating a higher effective oyster density, more larvae settled on live S. glomerata than C. gigas. When C. gigas was prevented from suspension feeding, settlement of larvae on C. gigas was enhanced. By contrast, settlement was similar between the two species when dead. While the presently low densities of the invasive oyster C. gigas may enhance S. glomerata larval settlement in east Australian estuaries, future increases in densities could produce negative impacts on native oyster settlement. Synthesis and applications: Our study has shown that both the spatial arrangement and density of invaders can influence their impact. Hence, management strategies aimed at preventing invasive populations reaching damaging sizes should not only consider the threshold density at which impacts exceed some acceptable limit, but also how patch formation modifies this. © 2013 The Authors. |
format |
Article in Journal/Newspaper |
author |
Wilkie, E M Bishop, M J O'Connor, W A |
author_facet |
Wilkie, E M Bishop, M J O'Connor, W A |
author_sort |
Wilkie, E M |
title |
The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
title_short |
The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
title_full |
The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
title_fullStr |
The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
title_full_unstemmed |
The density and spatial arrangement of the invasive oyster Crassostrea gigas determines its impact on settlement of native oyster larvae |
title_sort |
density and spatial arrangement of the invasive oyster crassostrea gigas determines its impact on settlement of native oyster larvae |
publisher |
John Wiley & Sons Ltd. |
publishDate |
2013 |
url |
https://doi.org/10.1002/ece3.872 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
usc:22589 URN:ISSN: 2045-7758 |
op_rights |
Copyright © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.This is an open access article under the term s of the Creative Commons At tribution License, which permits use,distribution and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1002/ece3.872 |
container_title |
Ecology and Evolution |
container_volume |
3 |
container_issue |
15 |
container_start_page |
4851 |
op_container_end_page |
4860 |
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1766393615192424448 |