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Shallows of the lower Danube as additional sources of potamoplankton

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Abstract

This paper presents studies on the algal flora of the Bulgarian Danube section during three summer periods (1980–1982) and during the four seasons of 1987/1988. The following variables were investigated: 1) species composition of the river phytoplankton and the phytobenthos; 2) frequency quotients of the species; 3) number of species at the investigated sites; 4) phytoplankton numbers and biomass; 5) floristic similarity between the sites. The data show the existence of a dynamic connection between phytoplankton and phytobenthos. The shallows in the midstream and river arms play an important role as potamoplankton sources during the periods of low waters. It is comparable with the role of the adjacent wetlands to which previously priority was given. This is especially so below 597th river kilometer.

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  1. Department of Botany, Faculty of Biology, Sofia University, 8 bld. Dr. Zankov, 1421, Sofia, Bulgaria

    Maya Petrova Stoyneva

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  1. Maya Petrova Stoyneva
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Academia Naturalis Heidelberg

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Stoyneva, M.P. Shallows of the lower Danube as additional sources of potamoplankton. Hydrobiologia 289, 171–178 (1994). https://doi.org/10.1007/BF00007418

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