Biodiversity is the difference of species in one particular ecosystem. Biodiversity is everywhere; it is an essential part to the survival of an ecosystem and the species living in it. Biodiversity doesn't include only animals it also includes plant species.
Loss of biodiversity has had an impact to ecosystems on a global scale. This impact on the ecosystems has had an alarming effect on species population; for instance it is estimated that about 27,000 species of plants and insects die out each year.
One way loss of biodiversity effects ecosystems is that if you remove one species, a predator, say a wolf, the entire ecosystem would go haywire, the wolfs pray would become over populated. Although if you reversed that and took out the prey the ecosystem would still mess up, because if you take out the wolves prey they would find another source of food like cattle or sheep. .
Unfortunately we are the main cause for loss of species diversity, especially in the rainforest where about 300 square miles are being cut down each day (as of 1997). Since this is happening there are thousands of plant species being wiped out, such as plants that keep animals safe by bearing fruit so the animals can eat it eat and stay healthy, and the plants also give the animals shelter. There are other plants being wiped out too, like medicinal herbs, some of which scientists haven't even classified yet. Animals are also affected by this deforestation; many are becoming extinct because of lack of food and shelter.
The loss of plant biodiversity because of deforestation has had a great impact on air pollution. The reason for this is that without enough plants they can't produce enough oxygen through photosynthesis to keep the atmosphere clean so it becomes polluted.
Biodiversity impacts the environment in different ways than just air pollution. For example, wetlands and swamps with their various plants and algaes help clean and recycle the earth's water.