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水生生物学期刊
SJR: 0.227 SNIP: 0.901 CiteScore™: 0.5

ISSN 打印: 0018-8166
ISSN 在线: 1943-5991

水生生物学期刊

DOI: 10.1615/HydrobJ.v37.i1.10
12 pages

A Simple Model of a Lake Ecosystem for the Study of Relationships between its Components

A. F. Alimov
Zoological Institute Russian Academy of Sciences St.-Petersburg, Russia
A. A. Umnov
Institute of Zoology Russian Academy of Sciences St. Petersburg, Russia

ABSTRACT

A simple model of a lake ecosystem consisting of autotrophic and heterotrophic organisms, and also of organic matter both suspended in water and accumulated in bottom sediments, has been studied. The processes of production and decomposition of organic matter were simulated by using the general equations governing the main relationships in the ecosystem. It has been found that the capacity of the ecosystem for stabilization at the expense of the intra-ecosystem relationships is its main characteristics Production of the communities of heterotrophic organisms incorporated into the ecosystem may depend to a large extent on the structure of ration of animals. Production, P/B coefficients, and the efficiency of functioning of the ecosystem belong to its main characteristics. The values of Р/B coefficients and the efficiency of functioning of the ecosystem are higher than those of the populations and communities of hydrobionts. Simplification in the structure of an ecosystem is accompanied by the increase in values of P/B coefficients and the efficiency of its functioning.


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