Morphological and ecological shifts in a land snail caused by the impact of an introduced predator
Abstract Introduced predators have become major threats to native animal species in oceanic islands. A number of studies have shown that alien predators have caused serious extinctions of island endemics. However, little attention has been paid to the evolutionary impacts of alien predators on nativ...
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crwiley:10.1007/s11284-006-0330-3 2024-06-02T08:13:44+00:00 Morphological and ecological shifts in a land snail caused by the impact of an introduced predator Chiba, Satoshi 2007 http://dx.doi.org/10.1007/s11284-006-0330-3 http://www.springerlink.com/index/pdf/10.1007/s11284-006-0330-3 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecological Research volume 22, issue 6, page 884-891 ISSN 0912-3814 1440-1703 journal-article 2007 crwiley https://doi.org/10.1007/s11284-006-0330-3 2024-05-03T10:38:31Z Abstract Introduced predators have become major threats to native animal species in oceanic islands. A number of studies have shown that alien predators have caused serious extinctions of island endemics. However, little attention has been paid to the evolutionary impacts of alien predators on native species. The present study shows that predation by black rats, Rattus rattus , has resulted in ecological and morphological changes in the land snail Mandarina anijimana from the island of Anijima in the Ogasawara archipelago. The frequency of empty predated shells has increased over the past 17–19 years in southern areas of the island. The shells of these snails were found to be significantly higher, smaller and darker in the survey in 2006 than in the survey in 1987–1989 performed in central and southern parts of Anijima, where predation by Rattus was serious. M. anijimana were formerly restricted to shallow broad‐leaved litter, whereas they are currently found in deep palm litter, where predation pressure from Rattus may be lower. This suggests that increased predation pressure by Rattus has changed the habitat use of M. anijimana . The close association between shell morphology and habitat use of Mandarina species suggests that the habitat shift induced by the predation of Rattus has caused these changes in the shell morphology of M. anijimana over a period of 17–19 years. Article in Journal/Newspaper Rattus rattus Wiley Online Library Ecological Research 22 6 884 891 |
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Wiley Online Library |
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language |
English |
description |
Abstract Introduced predators have become major threats to native animal species in oceanic islands. A number of studies have shown that alien predators have caused serious extinctions of island endemics. However, little attention has been paid to the evolutionary impacts of alien predators on native species. The present study shows that predation by black rats, Rattus rattus , has resulted in ecological and morphological changes in the land snail Mandarina anijimana from the island of Anijima in the Ogasawara archipelago. The frequency of empty predated shells has increased over the past 17–19 years in southern areas of the island. The shells of these snails were found to be significantly higher, smaller and darker in the survey in 2006 than in the survey in 1987–1989 performed in central and southern parts of Anijima, where predation by Rattus was serious. M. anijimana were formerly restricted to shallow broad‐leaved litter, whereas they are currently found in deep palm litter, where predation pressure from Rattus may be lower. This suggests that increased predation pressure by Rattus has changed the habitat use of M. anijimana . The close association between shell morphology and habitat use of Mandarina species suggests that the habitat shift induced by the predation of Rattus has caused these changes in the shell morphology of M. anijimana over a period of 17–19 years. |
format |
Article in Journal/Newspaper |
author |
Chiba, Satoshi |
spellingShingle |
Chiba, Satoshi Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
author_facet |
Chiba, Satoshi |
author_sort |
Chiba, Satoshi |
title |
Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
title_short |
Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
title_full |
Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
title_fullStr |
Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
title_full_unstemmed |
Morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
title_sort |
morphological and ecological shifts in a land snail caused by the impact of an introduced predator |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1007/s11284-006-0330-3 http://www.springerlink.com/index/pdf/10.1007/s11284-006-0330-3 |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
Ecological Research volume 22, issue 6, page 884-891 ISSN 0912-3814 1440-1703 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1007/s11284-006-0330-3 |
container_title |
Ecological Research |
container_volume |
22 |
container_issue |
6 |
container_start_page |
884 |
op_container_end_page |
891 |
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1800737323540807680 |