There is massive extinction from human activity. loss is resulting in the loss of many species, land and other resources are being misussed and what is known for sure is the worldecoligical system has been kept in balance through thousands of years. When human impact biodiversity there could be a good change like good resources orgnism can feed of like carbon dioxide to plants and fessies or plants giving us humans pure oxygen to live and breath the fresh smell that keeps us human alive. Human like i said help the plants in the ecosystem and the plants help us human back by giving or releasing oxygen and us human breathing oxygen and making carbondioxide to geive to the plants and soo thats who we affect ecosystems and how ecosystem affect us.