Question: Study the graph and determine the overall trend in biological diversity of vertebrate species from 1970 to 2000. Sociobiologist E. O. Wilson says that the

Study the graph and determine the overall trend in biological diversity of vertebrate species from 1970 to 2000. Sociobiologist E. O. Wilson says that the five forces responsible for this trend are habitat loss, invasive species, pollution, population growth, and over-consumption. 

120 Terrestrial vertebrate species 100 Marine vertebrate species 80 All vertebrate species 60 Freshwater vertebrate spec

120 Terrestrial vertebrate species 100 Marine vertebrate species 80 All vertebrate species 60 Freshwater vertebrate species 40 1970 2000 1975 1980 1985 1990 1995 Population index (1970 = 100)

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