BIO153H5 Chapter Notes - Chapter 56: Ecosystem Services, Ecosystem Diversity, Ozone Depletion
Document Summary
Conservation biology integrates ecology, physiology, molecular biology, genetics, and evolutionary biology to conserve biological diversity at all levels. The high rate of e(cid:454)ti(cid:374)(cid:272)tio(cid:374) is (cid:396)espo(cid:374)si(cid:271)le fo(cid:396) toda(cid:455)"s (cid:271)iodi(cid:448)e(cid:396)sit(cid:455) (cid:272)(cid:396)isis (cid:894)e(cid:454)ti(cid:374)(cid:272)tio(cid:374) itself is a natural phenomenon) Biodiversity (biological diversity) can be considered at three main levels: genetic, species, and ecosystem diversity. Comprises not only the individual genetic variation within a population, but also the genetic variation between populations that is often associated with adaptations to local conditions. If one population becomes extinct, then a species may have lost some of the genetic diversity that makes microevolution possible erosion of genetic diversity reduces the adaptive potential of the species. Species diversity is the variety of species in an ecosystem or across the biosphere (as more species are lost to extinction, species diversity decreases) Local extinction is known as extirpation (a species may become extinct in one area, but survive in another)
