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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Frugivores at higher risk of extinction are the key elements of a mutualistic network

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Autor(es):
Vidal, Mariana M. [1] ; Hasui, Erica [2] ; Pizo, Marco A. [3] ; Tamashiro, Jorge Y. [4] ; Silva, Wesley R. [5] ; Guimaraes, Jr., Paulo R. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Biociencias, Dept Ecol, Sao Paulo - Brazil
[2] Univ Fed Alfenas, Inst Ciencias Nat, BR-37130000 Alfenas, MG - Brazil
[3] Univ Estadual Paulista, Dept Zool, Inst Biociencias, BR-13506900 Rio Claro, SP - Brazil
[4] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083862 Campinas, SP - Brazil
[5] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, BR-13083862 Campinas, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: ECOLOGY; v. 95, n. 12, p. 3440-3447, DEC 2014.
Citações Web of Science: 27
Resumo

Most tree species rely on vertebrates for seed dispersal, and many vertebrates use fruits as food resources in tropical forests. Therefore, plant-frugivore interactions affect population dynamics and persistence in ecological communities. Plant-frugivore interactions often involve many species, forming networks of interacting plants and animals that play different roles in determining network organization. The network organization is the way interactions are structured in the community, which may have consequences for its ecological and evolutionary dynamics. Some species have greater influences on network organization and may be particularly important to species persistence. We identified the frugivores most important to the organization of networks of plants and frugivorous birds in three contiguous Atlantic forest sites in southeastern Brazil. We found that the species that contributed most to network organization were at higher risk of extinction. Among the main contributors to network organization were two cotingas and a toucan, large-bodied species that disperse seeds from many plants and are particularly vulnerable to habitat loss and hunting. As a consequence, ongoing extinctions may significantly affect the organization of plant-frugivore interactions in the studied system. We hypothesize that the crucial role of some threatened frugivores may occur in other seed dispersal systems in tropical communities, although the association between structural importance and degree of threat may be contingent on peculiarities of local communities and disturbances. (AU)

Processo FAPESP: 09/54422-8 - Estrutura e dinâmica coevolutiva em redes de interações mutualísticas
Beneficiário:Paulo Roberto Guimarães Junior
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
Processo FAPESP: 10/11633-6 - Fragmentação de habitats na Mata Atlântica e a persistência de redes de interação entre plantas e frugívoros
Beneficiário:Mariana Morais Vidal
Linha de fomento: Bolsas no Brasil - Doutorado