| abstract |
[PROBLEMS] To fully evaluate the natural environment by investigating the relationship between the ecological meaning of the indicator species inhabiting the natural environment and the external environment, and to apply many items related to the habitat or ecology to the evaluation criteria. In order to make it as suitable as possible for the region, it is to evaluate whether it is a water environment suitable for living organisms in Japan, so that it is properly handled in a natural scientific manner. [MEANS FOR SOLVING PROBLEMS] Evaluation criteria including advantages for survival of indicator species are set in advance as a plurality of relative numerical values for a plurality of items related to habitat environment or ecology of the indicator species, and then an evaluation target water area Among the organisms obtained by sampling the above, for the species belonging to fish, benthic organisms, phytoplanktons, zooplanktons or attached organisms, all the evaluation values for each item of those that fall under the indicator species are The item is summed up for each class, and the water environment is evaluated by evaluating the environment of the water area to be evaluated by a value obtained by dividing the total value by the number of the corresponding indicator species. Ecological factors are used as evaluation items, and such evaluation items are evaluated based on numerical evaluations that have been acquired in advance for each indicator species. It is possible to evaluate the relationship between the living organisms and the environment sufficiently, and to evaluate the water environment as realistic as possible by applying many items related to the habitat environment or ecology. [Selection figure] None |