Biological crusts carry out myriad ecological roles.
appear to be excellent bioindicators and serve important ecological roles.
Three early ecological roles of animals were as filter feeders, predators, and scavengers.
This is a case of convergence similar adaptations to similar ecological roles among unrelated species.
Angiosperms have greater diversity in their growth habits and ecological roles than gymnosperms.
The ecological roles of the pterosaurs were eventually taken over by birds.
The finding suggests that tetrapods developed specialized, modern ecological roles more than 200 million years ago.
They flourish particularly well in moist, humid forests, filling many ecological roles.
Most microorganisms remain uncultivated, and typically their ecological roles must be inferred from diversity and genomic studies.
These results show that the ecological roles of livestock and marmots are complementary, not functionally equivalent.
However, there is increasing evidence that these communities have diverging ecological roles across aspen's expansive range.
