How do animals affect biodiversity?
A new study may upend a widely held ecological theory about how grazing herbivores influence their ecosystems. The theory holds that plant-hungry creatures help shape ecosystems by mowing down dominant plants that might smother other plants, thus enhancing biodiversity—but only if the area is lush.
What are the impacts of animal extinction?
The general result is a reduction of functional diversity as well as total numbers of species, simplification of ecosystems, and in consequence loss or destabilisation of important ecosystem functions.
How does animal extinction affect us?
As species disappear, infectious diseases rise in humans and throughout the animal kingdom, so extinctions directly affect our health and chances for survival as a species. … The rise in diseases and other pathogens seems to occur when so-called “buffer” species disappear.