期刊
ECOLOGY LETTERS
卷 21, 期 4, 页码 484-493出版社
WILEY
DOI: 10.1111/ele.12909
关键词
Atlantic Forest; avian seed-dispersal interactions; beta-diversity of interactions; defaunation; eco-logical functions; habitat fragmentation; interaction centrality; meta-community; mobile links; tropical conservation
类别
资金
- Fundacao de Amparoa Pesquisa do Estado de Sao Paulo [BIOTA/FAPESP 2014/01986-0]
- FAPESP [2015/15172-7, 2016/18355-8, 2017/08406-7]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Severo Ochoa Excellence Award [SEV-2012-0262]
- Programa Ciencia Sem Fronteiras (CNPq) [PVE-401258/2012]
- SISBIOTA network - Top Predators Project (FAPESP) [2010/52315-7]
- CNPq [563299/2010-0]
Mutualistic interactions repeatedly preserved across fragmented landscapes can scale-up to form a spatial metanetwork describing the distribution of interactions across patches. We explored the structure of a bird seed-dispersal (BSD) metanetwork in 16 Neotropical forest fragments to test whether a distinct subset of BSD-interactions may mediate landscape functional connectivity. The metanetwork is interaction-rich, modular and poorly connected, showing high beta-diversity and turnover of species and interactions. Interactions involving large-sized species were lost in fragments < 10000 ha, indicating a strong filtering by habitat fragmentation on the functional diversity of BSD-interactions. Persistent interactions were performed by small-seeded, fast growing plant species and by generalist, small-bodied bird species able to cross the fragmented landscape. This reduced subset of interactions forms the metanetwork components persisting to defaunation and fragmentation, and may generate long-term deficits of carbon storage while delaying forest regeneration at the landscape level.
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