Invasive rats on tropical islands: Their population biology and impacts on native species
The three most invasive rat species, black or ship rat Rattus rattus, brown or Norway rats, R. norvegicus and Pacific rat, R. exulans have been incrementally introduced to islands as humans have explored the world’s oceans. They have caused serious deleterious effects through predation and competiti...
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ftdoajarticles:oai:doaj.org/article:68d66bd455da4a8490b9b183bdfca560 2023-05-15T18:05:37+02:00 Invasive rats on tropical islands: Their population biology and impacts on native species Grant A. Harper Nancy Bunbury 2015-01-01T00:00:00Z https://doi.org/10.1016/j.gecco.2015.02.010 https://doaj.org/article/68d66bd455da4a8490b9b183bdfca560 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2351989415000244 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2015.02.010 https://doaj.org/article/68d66bd455da4a8490b9b183bdfca560 Global Ecology and Conservation, Vol 3, Iss C, Pp 607-627 (2015) Rattus Ship rats Pacific rats Norway rats Diet Primary productivity Ecology QH540-549.5 article 2015 ftdoajarticles https://doi.org/10.1016/j.gecco.2015.02.010 2022-12-31T15:58:49Z The three most invasive rat species, black or ship rat Rattus rattus, brown or Norway rats, R. norvegicus and Pacific rat, R. exulans have been incrementally introduced to islands as humans have explored the world’s oceans. They have caused serious deleterious effects through predation and competition, and extinction of many species on tropical islands, many of which are biodiversity hotspots. All three rat species are found in virtually all habitat types, including mangrove and arid shrub land. Black rats tend to dominate the literature but despite this the population biology of invasive rats, particularly Norway rats, is poorly researched on tropical islands. Pacific rats can often exceed population densities of well over 100 rats ha−1 and black rats can attain densities of 119 rats ha−1, which is much higher than recorded on most temperate islands. High densities are possibly due to high recruitment of young although the data to support this are limited. The generally aseasonally warm climate can lead to year-round breeding but can be restricted by either density-dependent effects interacting with resource constraints often due to aridity. Apparent adverse impacts on birds have been well recorded and almost all tropical seabirds and land birds can be affected by rats. On the Pacific islands, black rats have added to declines and extinctions of land birds caused initially by Pacific rats. Rats have likely caused unrecorded extinctions of native species on tropical islands. Further research required on invasive rats on tropical islands includes the drivers of population growth and carrying capacities that result in high densities and how these differ to temperate islands, habitat use of rats in tropical vegetation types and interactions with other tropical species, particularly the reptiles and invertebrates, including crustaceans. Article in Journal/Newspaper Rattus rattus Directory of Open Access Journals: DOAJ Articles Norway Pacific Global Ecology and Conservation 3 607 627 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Rattus Ship rats Pacific rats Norway rats Diet Primary productivity Ecology QH540-549.5 |
spellingShingle |
Rattus Ship rats Pacific rats Norway rats Diet Primary productivity Ecology QH540-549.5 Grant A. Harper Nancy Bunbury Invasive rats on tropical islands: Their population biology and impacts on native species |
topic_facet |
Rattus Ship rats Pacific rats Norway rats Diet Primary productivity Ecology QH540-549.5 |
description |
The three most invasive rat species, black or ship rat Rattus rattus, brown or Norway rats, R. norvegicus and Pacific rat, R. exulans have been incrementally introduced to islands as humans have explored the world’s oceans. They have caused serious deleterious effects through predation and competition, and extinction of many species on tropical islands, many of which are biodiversity hotspots. All three rat species are found in virtually all habitat types, including mangrove and arid shrub land. Black rats tend to dominate the literature but despite this the population biology of invasive rats, particularly Norway rats, is poorly researched on tropical islands. Pacific rats can often exceed population densities of well over 100 rats ha−1 and black rats can attain densities of 119 rats ha−1, which is much higher than recorded on most temperate islands. High densities are possibly due to high recruitment of young although the data to support this are limited. The generally aseasonally warm climate can lead to year-round breeding but can be restricted by either density-dependent effects interacting with resource constraints often due to aridity. Apparent adverse impacts on birds have been well recorded and almost all tropical seabirds and land birds can be affected by rats. On the Pacific islands, black rats have added to declines and extinctions of land birds caused initially by Pacific rats. Rats have likely caused unrecorded extinctions of native species on tropical islands. Further research required on invasive rats on tropical islands includes the drivers of population growth and carrying capacities that result in high densities and how these differ to temperate islands, habitat use of rats in tropical vegetation types and interactions with other tropical species, particularly the reptiles and invertebrates, including crustaceans. |
format |
Article in Journal/Newspaper |
author |
Grant A. Harper Nancy Bunbury |
author_facet |
Grant A. Harper Nancy Bunbury |
author_sort |
Grant A. Harper |
title |
Invasive rats on tropical islands: Their population biology and impacts on native species |
title_short |
Invasive rats on tropical islands: Their population biology and impacts on native species |
title_full |
Invasive rats on tropical islands: Their population biology and impacts on native species |
title_fullStr |
Invasive rats on tropical islands: Their population biology and impacts on native species |
title_full_unstemmed |
Invasive rats on tropical islands: Their population biology and impacts on native species |
title_sort |
invasive rats on tropical islands: their population biology and impacts on native species |
publisher |
Elsevier |
publishDate |
2015 |
url |
https://doi.org/10.1016/j.gecco.2015.02.010 https://doaj.org/article/68d66bd455da4a8490b9b183bdfca560 |
geographic |
Norway Pacific |
geographic_facet |
Norway Pacific |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
Global Ecology and Conservation, Vol 3, Iss C, Pp 607-627 (2015) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2351989415000244 https://doaj.org/toc/2351-9894 2351-9894 doi:10.1016/j.gecco.2015.02.010 https://doaj.org/article/68d66bd455da4a8490b9b183bdfca560 |
op_doi |
https://doi.org/10.1016/j.gecco.2015.02.010 |
container_title |
Global Ecology and Conservation |
container_volume |
3 |
container_start_page |
607 |
op_container_end_page |
627 |
_version_ |
1766177115151007744 |