Two main aspects of the study of diversity can be distinguished: the first is related to the inventory of living organisms, the second is related to the organization of life at the level of biotic communities. Quantitative assessment of diversity is two-components as the richness of elements and their evenness. A model of the ecosystem continuum is proposed. The greatest indicators of diversity should be expected in the middle part of the environmental gradients with temporal stability. Study of producers and consumers in water bodies of Ukraine showed a regular change in their community structure in the gradient of saprobity indices. The decreasing of community diversity estimated by the Shannon index and by species richness was found at both high and low values of the saprobity indices. The fundamental coincidence of the empirical point fields of the Shannon index for the communities of invertebrates and phytoplankton with the field points of the empirical model indicates the universality of the bimodal distribution of diversity indicators in the trophic gradient. It is shown that the estimates by zoobenthos overestimate organic pollution compared with the calculations of the same indicators by phytoplankton.
Bibliographical noteFunding Information:
Acknowledgments: This work was partly supported by the National Academy of sciences of Ukraine, project N1230-2019. This work was partly supported by the Israel Ministry of Aliyah and Integration.
© 2016 by the authors.
- Ecosystem models
- Power plant cooling pools
- Species-environment relationships
ASJC Scopus subject areas
- Ecological Modeling
- Agricultural and Biological Sciences (miscellaneous)
- Nature and Landscape Conservation