科研之友
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摘要
I observed birds forage for flowers and fruits for six consecutive years in a North Island forest to compare patterns in nectivory and frugivory in plants that rely on birds for both mutualistic services. Birds visited fewer flowering plant species (n=9) than fleshy fruited plant species (n=23). Four bird plant' species were identified (i.e., plant species that are co-dependent on birds for both pollination and seed dispersal). Visitation rates to flowers produced by bird plants were correlated with visitation rates to fruits, indicating that if a bird plant relied heavily on a particular bird species to visit its flowers, it tended to rely on the same bird species to visit its fruits. Coupled rates nectivory and frugivory raises a significant conservation concern, as it indicates that the loss of specific bird species may have a two-fold, negative effect on the reproductive fitness of plants that rely on birds for both pollination and seed dispersal.
- 出版日期2013-9-1
