Bottom-up effect: a rodent outbreak following the bamboo blooming in a Neotropical rainforest

Autor(es)

Bovendorp, Ricardo Siqueira ^{[1, 2]} ; Heming, Neander Marcel ^[1] ; Percequillo, Alexandre Reis ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Santa Cruz, Lab Ecol Aplicada Conservaeao, Dept Ciencias Biol, Rodovia Jorge Amado, Km 16, BR-45662900 Ilheus, BA - Brazil

^[2] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Lab Zool Vertebrados, Dept Ciencias Biol, Av Padua Dias 11, Cx Postal 09, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MAMMAL RESEARCH; v. 65, n. 3 MAY 2020.
• Citações Web of Science: 0

Resumo

Variation in primary productivity has been described for an extensive range of natural systems and may lead to remarkable bottom-up effects on consumer communities at higher trophic levels. During a standardized sampling of the small mammal assemblage in the Reserva Florestal Morro Grande, SP, Brazil, we documented a bamboo blooming followed by an increase in abundance of small mammals. Here we described the effects of this blooming of the assemblage of small mammals and evaluated if (i) the abundance of frugi-/granivore species is affected more strongly than the abundance of insect-/omnivore species and (ii) due to the massive food availability in the habitat (bamboo seeds), body mass index of one of the affected species, the rodent Euryoryzomys russatus, will increase after the bamboo blooming. Although some species became more abundant, the difference was not related to species diet. We did find a significant increase in the body weight of Euryoryzomys russatus after the bamboo blooming. We emphasize that an infrequent and poorly known event like bamboo blooming can have a major impact on rodent population dynamics, regardless of the species diet, increasing abundance, and weight bottom-up controlled by the massive availability of food resources. (AU)

• Processo FAPESP: 05/56555-4 - Diversidade de mamíferos em paisagens fragmentadas no Planalto Atlântico de São Paulo
• Beneficiário: Renata Pardini
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 09/16009-1 - Sistemática, evolução e diversificação da subfamília Sigmodontinae na América do Sul: a tribo Oryzomyini
• Beneficiário: Alexandre Reis Percequillo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 08/55483-8 - História natural e ecologia de duas espécies de roedores simpátricas da Oryzomyini (Cricetidae: Sigmodontinae) na Floresta Atlântica
• Beneficiário: Ricardo Siqueira Bovendorp
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto