Differentiate between in brief about direct & indirect use value of biodiversity with suitable examples.
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Answer:
Direct values include the ways in which biodiversity is used or consumed by man e.g. fishery and forestry products, as well as the ways in which it affects mankind through its ecological processes e.g. watershed protection or the role of vegetation in the carbon and water cycles.
Biodiversity provides indirect benefits to human beings which support the existence of biological life and other benefits which are difficult to quantify. These include social and cultural values, ethical values, aesthetic values, option values and environment service values For example high densities of birds in a certain area may limit the abundance of pests which would otherwise destroy crops; the birds themselves require a natural forest for nesting. The indirect values include non-consumptive use value, option value and existence value.