The Aquatic Organisms Diversity, Community Structure, and Environmental Conditions

Alexander Protasov,Anzhelika Sylaieva,Tatiana Novoselova,Sophia Barinova

doi:10.3390/d11100190

Alexander Protasov, Anzhelika Sylaieva + Show 2 more

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https://doi.org/10.3390/d11100190

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Journal: Diversity	Publication Date: Oct 8, 2019
Citations: 26	License type: CC BY 4.0

Affiliation: Institute of Hydrobiology, University of Haifa

Abstract

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.

Highlights

Biological diversity is a fundamental appearance that represents the second part of the ecosystem after the environmental properties
Study of producers and consumers in water bodies of Ukraine showed a regular change in their community structure in the gradient of saprobity indices
On the base of our long-term investigation of aquatic communities in Ukraine results (Table 1), we summarized information and try to construct the theoretical model of the ecosystem continuum

Summary

Introduction

Biological diversity is a fundamental appearance that represents the second part of the ecosystem after the environmental properties. Two main aspects of the study of diversity can be distinguished: the first is related to the inventory of living organisms, their species, in the scale of regions and the biosphere. The second aspect is related to the organization of life at the level of biotic communities. Quantitative assessment of diversity should take into account its two components and include the richness and evenness. In the gradients of environmental factors, these components of diversity vary in different ways [1]. Biodiversity is highly relevant to problems of environmental protection

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