Allgi
A keystone species is a species whose presence has an influence on the size of the population of several other species in its community. A jaguar would be an example.
Extinct or threathening the species to extinct
pollution, littering, etc.
Invasive species...........pollution
lack of food a and our pollution
Leech
Speciation is the term used to describe the process for a new species developing from an existing species.
Because wen population is dity
biotic pollution
There are currently too many insect species at risk because of pollution.
Macroevolution The development of a new species is called speciation.
This can basically be defined as the introduction of a foreign species into an area which it is not native to.These foreign species may deprive the native species of food, habitat and some times prey on them.Causing them to become extinct.Humans are usually responsible for biotic pollution.