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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sugiura, Shinji Tsuru, Tomoyuki Yamaura, Yuichi Makihara, Hiroshi |
| Copyright Year | 2008 |
| Abstract | Although large islands generally support a richer insect fauna than small islands, many large islands, which are more often inhabited, have lost numerous species because of human activities and introduced organisms. To clarify the consequences of endemic insect conservation on small islands near inhabited islands, we compared the species richness, abundance, and composition of two beetle groups (Coleoptera: Cerambycidae and Mordellidae) captured using Malaise traps among three islands (Chichijima, 24.0 km$^{2}$; Anijima, 7.85 km$^{2}$; Nishijima, 0.49 km$^{2}$) in the oceanic Ogasawara (Bonin) Island group in the northwestern Pacific during June–July 2006 and 2007. Chichijima, the largest island, is inhabited, while Anijima and Nishijima are not. The numbers of cerambycid and mordellid species previously recorded were positively correlated with island area. However, the total numbers of cerambycid and mordellid species we captured in Malaise traps were not correlated with island area because we were unable to collect many species previously documented on Chichijima. The numbers of cerambycid and mordellid species per trap did not differ significantly among islands and years, although the deviance was well explained by the island variable. We captured greater numbers of cerambycid and mordellid individuals on Chichijima than on Anijima and Nishijima, and the numbers of cerambycid and mordellid individuals per trap significantly differed among islands and between years. Redundancy analysis (RDA) showed that the species composition of cerambycids and mordellids differed among the three islands. Whereas endangered species were rarely captured on Chichijima, alien or non-endemic species were frequently collected. Cerambycid and mordellid beetles on Chichijima may have been deleteriously affected by recent forest disturbance and introduced organisms. Therefore, conserving insect fauna on uninhabited island “refugia” is important for preserving the insect diversity of the Ogasawara Islands. |
| Starting Page | 377 |
| Ending Page | 385 |
| Page Count | 9 |
| File Format | |
| ISSN | 1366638X |
| Journal | Journal of Insect Conservation |
| Volume Number | 13 |
| Issue Number | 4 |
| e-ISSN | 15729753 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2008-09-25 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Alien species Biodiversity Disturbance Island area Ogasawara (Bonin) Islands Species richness Life Sciences Animal Ecology Entomology Conservation Biology/Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Animal Science and Zoology Nature and Landscape Conservation Insect Science |
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