【正文】
ources for agriculture, forestry, aquaculture, and animal husbandry ?Sources for medicines, pharmaceuticals ?Recreational, aesthetic, and scientific value ?Intrinsic value Biodiversity Concept Biodiversity: the variety and variability among living anisms and the ecological plexes in which they occur Species diversity: the number of species that occur in an area The number of species is counted in a gradually enlarged area of sampling, the result is a curve. The number of species rises rapidly at first, but it slows as the area of sampling inc