Intriguingly, the study also reveals that moderate levels of exotic species invasion may help maintain high biodiversity within ecosystems. This suggests that exotic species invasions could be ...

with higher biodiversity have fewer species that depend on just one other for food, shelter and maintaining their environment. With the example above, puffins could also eat molluscs and worms.

Save guides, add subjects and pick up where you left off with your BBC account. If the numbers of zooplankton are reduced by pollution, such as plastic waste, then more algae will grow and the ...