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水生生物学期刊
SJR: 0.227 SNIP: 0.575 CiteScore™: 0.24

ISSN 打印: 0018-8166
ISSN 在线: 1943-5991

水生生物学期刊

DOI: 10.1615/HydrobJ.v41.i5.10
pages 3-7

Some Structural and Functional Peculiarities of the Ecosystems of the Main Mountain Tributaries of the Danube River Basin

M. I. Cheredarik
Chernovtsy National University, Chernovtsy Regional Soviet of the Ukrainian Society of Nature Conservation, Ukraine
V. I. Korolyuk
Chernovtsy National University, Chernovtsy Regional Soviet of the Ukrainian Society of Nature Conservation, Ukraine

ABSTRACT

It has been found that hydrological peculiarities of some mountain tributaries of the Danube River, including the Prut, Siret, and Cheremosh rivers, are responsible for a rather low primary production. In all seasons decomposition predominated over production. Only in some cases, the index of the intensity of self-purification (A/R) was higher than 1 (1.05−1.10). For the most part phytoplankton net production was characterized by negative values, which testifies that allochthonous organic matter was of considerable importance in the energetic supply of the ecosystem.