Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk
Abstract Eradicating invasive species from islands is a proven method for safeguarding threatened and endangered species from extinction. Island eradications can deliver lasting benefits, but require large up‐front expenditure of limited conservation resources. The choice of islands must therefore b...
Published in: | Journal of Applied Ecology |
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Online Access: | http://dx.doi.org/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.14295 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 |
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crwiley:10.1111/1365-2664.14295 2024-03-31T07:55:08+00:00 Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk Kumar, Viney Nunez, Andre Brown, Kaitlyn Agarwal, Kanupriya Hall, Samuel Bode, Michael 2022 http://dx.doi.org/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.14295 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Journal of Applied Ecology volume 59, issue 12, page 3003-3013 ISSN 0021-8901 1365-2664 Ecology journal-article 2022 crwiley https://doi.org/10.1111/1365-2664.14295 2024-03-04T13:03:04Z Abstract Eradicating invasive species from islands is a proven method for safeguarding threatened and endangered species from extinction. Island eradications can deliver lasting benefits, but require large up‐front expenditure of limited conservation resources. The choice of islands must therefore be prioritised. Numerous tools have been developed to prioritise island eradications, but none fully account for the risk of those eradicated species later returning to the island: reinvasion. In this paper, we develop a prioritisation method for island eradications that accounts for the complexity of the reinvasion process. By merging spatially explicit metapopulation modelling with stochastic dynamic optimisation techniques, we construct a decision‐support tool that optimises conservation outcomes in the presence of reinvasion risk. We applied this tool to two different case studies—rat ( Rattus rattus ) invasions in the Seaforth archipelago in New Zealand, and cane toad ( Rhinella marina ) invasions in the Dampier archipelago in Australia—to illustrate how state‐dependent optimal policies can maximise expected conservation gains. In both case studies, incorporating reinvasion risk dramatically altered the optimal order of island eradications, and improved the potential conservation benefits. The increase in benefits was larger in Dampier than Seaforth (42% improvement versus 6%), as a consequence of both the characteristics of the invasive species, and the arrangement of the islands. Synthesis and applications . Our results illustrate the potential consequences of ignoring reinvasion risk. We recommend that reinvasion risk be explicitly included in any island eradication prioritisation involving an archipelago, particularly when some islands are close to the mainland. Article in Journal/Newspaper Rattus rattus Wiley Online Library New Zealand Journal of Applied Ecology 59 12 3003 3013 |
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Wiley Online Library |
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language |
English |
topic |
Ecology |
spellingShingle |
Ecology Kumar, Viney Nunez, Andre Brown, Kaitlyn Agarwal, Kanupriya Hall, Samuel Bode, Michael Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
topic_facet |
Ecology |
description |
Abstract Eradicating invasive species from islands is a proven method for safeguarding threatened and endangered species from extinction. Island eradications can deliver lasting benefits, but require large up‐front expenditure of limited conservation resources. The choice of islands must therefore be prioritised. Numerous tools have been developed to prioritise island eradications, but none fully account for the risk of those eradicated species later returning to the island: reinvasion. In this paper, we develop a prioritisation method for island eradications that accounts for the complexity of the reinvasion process. By merging spatially explicit metapopulation modelling with stochastic dynamic optimisation techniques, we construct a decision‐support tool that optimises conservation outcomes in the presence of reinvasion risk. We applied this tool to two different case studies—rat ( Rattus rattus ) invasions in the Seaforth archipelago in New Zealand, and cane toad ( Rhinella marina ) invasions in the Dampier archipelago in Australia—to illustrate how state‐dependent optimal policies can maximise expected conservation gains. In both case studies, incorporating reinvasion risk dramatically altered the optimal order of island eradications, and improved the potential conservation benefits. The increase in benefits was larger in Dampier than Seaforth (42% improvement versus 6%), as a consequence of both the characteristics of the invasive species, and the arrangement of the islands. Synthesis and applications . Our results illustrate the potential consequences of ignoring reinvasion risk. We recommend that reinvasion risk be explicitly included in any island eradication prioritisation involving an archipelago, particularly when some islands are close to the mainland. |
format |
Article in Journal/Newspaper |
author |
Kumar, Viney Nunez, Andre Brown, Kaitlyn Agarwal, Kanupriya Hall, Samuel Bode, Michael |
author_facet |
Kumar, Viney Nunez, Andre Brown, Kaitlyn Agarwal, Kanupriya Hall, Samuel Bode, Michael |
author_sort |
Kumar, Viney |
title |
Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
title_short |
Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
title_full |
Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
title_fullStr |
Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
title_full_unstemmed |
Prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
title_sort |
prioritising the eradication of invasive species from island archipelagos with high reinvasion risk |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.14295 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.14295 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
Journal of Applied Ecology volume 59, issue 12, page 3003-3013 ISSN 0021-8901 1365-2664 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2664.14295 |
container_title |
Journal of Applied Ecology |
container_volume |
59 |
container_issue |
12 |
container_start_page |
3003 |
op_container_end_page |
3013 |
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1795036611949363200 |