期刊
ECOLOGY LETTERS
卷 22, 期 10, 页码 1638-1649出版社
WILEY
DOI: 10.1111/ele.13359
关键词
Apparent competition; Barro Colorado Island; host specialisation; interaction network; Janzen-Connell hypothesis; Panama; plant traits; quantitative food web; seed predation
类别
资金
- Academy of Finland
- Royal Society
- John Fell OUP Research Fund
- Natural Environment Research Council [NE/J007463/1]
- Rachadaphiseksomphot Fund, Graduate School, Chulalongkorn University
- SENACYT
- GACR [16-20825S]
- Frank Levinson Family Foundation
- Smithsonian Tropical Research Institute
- Carl Cedercreutz Foundation
- U.S. National Science Foundation
- Smithsonian barcoding initiative [FY014, FY015]
- NERC [NE/J011169/1, NE/J007463/1] Funding Source: UKRI
The top-down and indirect effects of insects on plant communities depend on patterns of host use, which are often poorly documented, particularly in species-rich tropical forests. At Barro Colorado Island, Panama, we compiled the first food web quantifying trophic interactions between the majority of co-occurring woody plant species and their internally feeding insect seed predators. Our study is based on more than 200 000 fruits representing 478 plant species, associated with 369 insect species. Insect host-specificity was remarkably high: only 20% of seed predator species were associated with more than one plant species, while each tree species experienced seed predation from a median of two insect species. Phylogeny, but not plant traits, explained patterns of seed predator attack. These data suggest that seed predators are unlikely to mediate indirect interactions such as apparent competition between plant species, but are consistent with their proposed contribution to maintaining plant diversity via the Janzen-Connell mechanism.
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