期刊
BASIC AND APPLIED ECOLOGY
卷 9, 期 6, 页码 663-672出版社
ELSEVIER GMBH
DOI: 10.1016/j.baae.2007.07.002
关键词
Plant-animal interaction; Ecosystem process; Keystone species; Figs; Kenya
类别
资金
- Kenyan Ministry for Education and Research
- German Federal Ministry of Education and Research [01LCO025]
Clearance, fragmentation, and degradation of tropical forests have resulted in declines of biodiversity. This loss of biodiversity is endangering important ecosystem processes such as seed dispersal. If anthropogenic disturbances affect seed dispersal of keystone plants, effects on tropical ecosystems might be especially pronounced. We studied frugivore assemblages and fruit removal from 25 Ficus thonningii trees in the heavily fragmented and distrubed Kakamega Forest, western Kenya. During 400 observation hours we recorded 36 frugivores visiting F. thonningii trees. We recorded significantly fewer frugivorous species in fragments compared to the main forest and in hifhly, compared to little, disturbed sites. Effects of fragmentation and local disturbance on the number of individuals were not significant but showed similar trends to those in the previous analyses. Furthermore, fruit removal from focal trees was slightly reduced in fragmented and significantly reduced in highly distrurbed sites. These results suggest that mutualistic effects on the biodiversity of tropical forests. (c) 2007 Gessellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.
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