GEC 007 Lecture Notes - Lecture 5: Ecosystem Diversity, Animal Genetic Resources For Food And Agriculture, Tumbaga

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Even greater losses will occur in the future if humanity continues its present unsustainable use of natural resources. In documenting this decline, there has been a focus on species extinctions, the most obvious manifestation of biodiversity loss. In addition, there is a loss of ecosystems, populations, and genes. All these are the only truly irreversible consequences of environmental change. When any of these is lost, it is gone forever. Species losses are also the aspect of biodiversity loss that is most often considered, for example, by the u. n. convention on biological diversity. Even a species that survives can lose much of its genetic diversity if local populations are lost from most of its original range. Furthermore, ecosystems may shrink in the area dramatically and lose many of their functions, even though their constituent species manage to survive. The loss of ecosystems, species, populations, and genes all have implications for human health (chivian, 2003).

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