Bottom-up and top-down processes interact to modify intraguild interactions in resource-pulse environments.

摘要: Top predators are declining globally, in turn allowing populations of smaller predators, or mesopredators, to increase and potentially have negative effects on biodiversity. However, detection interactions among sympatric can be complicated by fluctuations the background availability resources environment, which may modify both numbers strengths their interactions. Here, we first present a conceptual framework that predicts how top-down bottom-up regulate predator environments experience resource pulses. We then test it using 2 years remote-camera trapping data uncover spatial temporal between top predator, dingo Canis dingo, mesopredatory European red fox Vulpes vulpes feral cat Felis catus, during population booms, declines busts prey model desert system. found dingoes predictably suppress abundances mesopredators strongest numbers. Given pulses usually driven large yet infrequent rains, conclude like provide net benefits suppressing prolonged bust periods when low vulnerable.