arming and top predator loss drive direct and indirect effects on multiple trophic groups within and across ecosystem

Autor(es)

Antiqueira, Pablo Augusto P. ^[1] ; Petchey, Owen L. ^[2] ; Rezende, Felipe ^[1] ; Machado Velho, Luiz Felipe ^{[3, 4]} ; Rodrigues, Luzia Cleide ^[3] ; Romero, Gustavo Quevedo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Biol IB, Lab Interacoes Multitrof & Biodiversidade, UNICAMP, Campinas - Brazil

^[2] Univ Zurich, Inst Evolutionary Biol & Environm Studies, Zurich - Switzerland

^[3] Univ Estadual Maringa UEM, Nucleo Pesquisas Limnol Ictiol & Aquicultura NUPE, Maringa, Parana - Brazil

^[4] Univ Cesumar UniCesumar PPGTL, Inst Cesumar Ciencia & Tecnolgia ICETI, Maringa, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Animal Ecology; v. 91, n. 2 DEC 2021.
• Citações Web of Science: 0

Resumo

The interspecific interactions within and between adjacent ecosystems strongly depend on the changes in their abiotic and biotic components. However, little is known about how climate change and biodiversity loss in a specific ecosystem can impact the multiple trophic interactions of different biological groups within and across ecosystems. We used natural microecosystems (tank-bromeliads) as a model system to investigate the main and interactive effects of aquatic warming and aquatic top predator loss (i.e. trophic downgrading) on trophic relationships in three integrated food web compartments: (a) aquatic micro-organisms, (b) aquatic macro-organisms and (c) terrestrial predators (i.e. via cross-ecosystem effects). The aquatic top predator loss substantially impacted the three food web compartments. In the aquatic macrofauna compartment, trophic downgrading increased the filter feeder richness and abundance directly and indirectly via an increase in detritivore richness, likely through a facilitative interaction. For the microbiota compartment, aquatic top predator loss had a negative effect on algae richness, probably via decreasing the input of nutrients from predator biological activities. Furthermore, the more active terrestrial predators responded more to aquatic top predator loss, via an increase in some components of aquatic macrofauna, than more stationary terrestrial predators. The aquatic trophic downgrading indirectly altered the richness and abundance of cursorial terrestrial predators, but these effects had different direction according to the aquatic functional group, filter feeder or other detritivores. The web-building predators were indirectly affected by aquatic trophic downgrading due to increased filter feeder richness. Aquatic warming did not affect the aquatic micro- or macro-organisms but did positively affect the abundance of web-building terrestrial predators. These results allow us to raise a predictive framework of how different anthropogenic changes predicted for the next decades, such as aquatic warming and top predator loss, could differentially affect multiple biological groups through interactions within and across ecosystems. (AU)

• Processo FAPESP: 17/09052-4 - Influência da latitude e dos subsídios aquáticos na amplitude de nicho e na estrutura das comunidades terrestres
• Beneficiário: Gustavo Quevedo Romero
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/08474-8 - Ecossistemas aquáticos continentais sob mudanças climáticas: impactos em múltiplos níveis de organização
• Beneficiário: Gustavo Quevedo Romero
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 17/26243-8 - Eventos extremos de precipitação e seus efeitos sobre a estrutura de comunidades e funcionamento ecossistêmico
• Beneficiário: Pablo Augusto Poleto Antiqueira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/12225-0 - Unificando determinantes ambientais e espaciais da estrutura de redes tróficas em escalas espaciais
• Beneficiário: Gustavo Quevedo Romero
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular