Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems.
数学模型也揭示了食物网可能是不稳定的，顶级肉食性动物的微小改变会对整个生态系统产生巨大影响。
When top predators like sharks disappear from their environments, ecosystems fall out of whack.
当像鲨鱼这样的顶级掠食者从环境中消失时，生态系统就会陷入混乱。
They can also have an important role in the ecosystem as top predators or as indicators of overfishing.
它们无论作为顶端掠食者还是过分捕捞的指示生物都在生态系统中扮演着重要的角色。
We know that most of these species are top predators and we know that removing the top predators usually has negative consequences to the system as a whole.
我们知道，这些物种大多数是顶层食肉动物，而顶层食肉动物的灭绝通常会对这个生态系统造成不良后果。
Such megacrocs, then, could easily have acted as top predators in this ecosystem.
这样的巨鳄能在这样的生态系统中轻松担当顶级掠食者的角色。
Such megacrocs, then, could easily have acted as top predators in this ecosystem.
这样的巨鳄能在这样的生态系统中轻松担当顶级掠食者的角色。
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