biodiversity in nature is a fundamental problem in ecology. An outstanding
challenge is embodied in the so-called competitive exclusion principle: the
number of consumer species in steady coexistence cannot exceed that of
resources. The fact that competitive exclusion is rarely observed in
natural ecosystems has not been fully understood. Here, Wang et al. show
that by forming chasing pairs and chasing triplets among the consumers and
resources in the consumption process, the competitive exclusion principle
can be naturally violated. See Wang et al., vol. 23, 2020.