In view of its mountainous terrain, peninsular shape, and status as an agglomeration of formerly separate landmasses, the island of Sulawesi, Indonesia, presents a fertile opportunity for examining biogeographical processes. Previous work on Sulawesi primates and amphibians suggested the existence of distinct areas of endemism (AoEs), but the relevance of these zones to a broader set of taxa has not been widely investigated, nor the reasons for their existence fully explored. Here, we use population genetic analyses of the endemic Sulawesi shrew, Crocidura elongata, to assess biogeographical partitioning according to the putative AoEs. We uncover significant cryptic diversity within C. elongata that poorly aligns with the AoEs. Rather, we identify patterns consistent with the earliest divergence occurring along elevational gradients, and subsequent divergence evolving across the islands AoEs. Our results suggest that disparate forces have contributed to the diversification of Sulawesis vertebrate fauna and complement other studies in highlighting the extensive intra-island diversification that has occurred among small mammal faunas on the larger islands of Indo-Australia.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-05132016-141042 |
| Date | 23 May 2016 |
| Creators | Eldridge, Ryan Andrew |
| Contributors | Esselstyn, Jacob, Sheldon, Frederick, Brown, Jeremy |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-05132016-141042/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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