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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.)

Interaction strength promotes robustness against cascading effects in mutualistic networks

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Autor(es):
Gaiarsa, Marilia P. [1] ; Guimaraes, Jr., Paulo R. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Ecol, BR-05508900 Sao Paulo, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: SCIENTIFIC REPORTS; v. 9, JAN 24 2019.
Citações Web of Science: 1
Resumo

Perturbations, such as fluctuations in abundance, can ripple across species assemblages through ecological interactions. Furthermore, the way in which ecological interactions are organized into a network and the interaction strengths connecting species may be important for cascading effects. Previous work revealed that network structure determines how cascading effects spread across species assemblages. A next step is to understand how interaction strengths influence cascading effects. Here, we assume that perturbations have negative effects, and we evaluate whether interaction strength affects network robustness to cascading effects in mutualistic interactions, and examine the role of network structure in mediating perturbation cascades when interaction strength is incorporated. We combine empirical data on 18 mutualistic networks, two simulations scenarios, and network theory, to investigate how network structure affects perturbation spreading time, a proxy of network robustness to cascading effects. Simulations in which we included interaction strength presented higher mean spreading time, indicating that interaction strength increases network robustness. Richness, modularity, and nestedness had a strong, positive effect, on mean perturbation spreading time regardless of the interaction strengths. We found that network structure and the distribution of interaction strengths affected communities' robustness to perturbation spreading. Our results contribute to the discussion on the danger that ecosystems face when species, and interactions alike, become extinct. (AU)

Processo FAPESP: 13/13319-5 - Cascatas ecológicas e evolutivas em redes mutualísticas
Beneficiário:Marília Palumbo Gaiarsa
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 14/20572-1 - Como efeitos em cascata se propagam em redes mutualísticas: incorporando o papel das espécies e história natural
Beneficiário:Marília Palumbo Gaiarsa
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado