Busca avançada
Ano de início
Entree
(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.)

Host-parasitoid persistence over variable spatio-temporally susceptible habitats: bottom-up effects of ephemeral resources

Texto completo
Autor(es):
Reigada, Carolina [1] ; de Aguiar, Marcus A. M. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: OIKOS; v. 121, n. 10, p. 1665-1679, OCT 2012.
Citações Web of Science: 2
Resumo

We experimentally and theoretically investigated the persistence of hosts and parasitoids interacting in a metapopulation structure consisting of ephemeral local patches (MELPs). We used a hostparasitoid system consisting of necrophagous Diptera species and their pupal parasitoids. The basal resources used by the host species were assumed to be ephemeral, supporting only one generation of individuals before completely disappearing from the environment. We experimentally measured the hostparasitoid persistence and the effects of local demographic processes in two scenarios: 1) constant occurrence of basal resources at a single site (no dispersion or colonization of other sites) and 2) variable occurrence of basal resources between two sites (colonization of a new patch requiring species dispersal). The experimental setup and findings were then formalized into a mathematical model describing the interaction dynamics in a MELP structure. We evaluated the contribution of several factors to the hostparasitoid coexistence, such as resource allocation probability (probability of resource appearance in a site), variation in resource size and number of sites available to receive resources in the MELP. We found that demographic fluctuations and environmental stochasticity affected the density of migrants, patch habitat connectivity, persistence and spatial distribution of interacting species. (AU)

Processo FAPESP: 09/05743-6 - Persistência da interação hospedeiro-parasitóide mediada por estrutura espacial e parâmetros demográficos dependentes da densidade
Beneficiário:Carolina Reigada Montoya
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 09/11032-5 - Dinâmica de populações e métodos semiclássicos
Beneficiário:Marcus Aloizio Martinez de Aguiar
Linha de fomento: Auxílio à Pesquisa - Temático