Biocenoza zanurzonych makrofitów w Warcie poniżej tamy
Journal Title: Roczniki Naukowe Polskiego Związku Wędkarskiego - Year 2014, Vol 27, Issue
Abstract
The tailwater of the Jeziorsko Reservoir (middle course of the large lowland Warta River, Poland) has long been a site of abundant seasonal development of macrophytes, which is due to a specific water management of the reservoir. In summer, low and stabilized flow causes appearance of submersed aquatic plants, which are destroyed by increased discharge in autumn. This unusual habitat increases the heterogeneity of the environment, including available food resources for macroinvertebrates and fish. Fish can forage there on zoobenthos (Oligochaeta, Chironomidae), epiphytic fauna (Chironomidae) and zooplankton (Cladocera), which seasonally flow down from the reservoir in great abundance. The present study evaluates macrophyte influence on the food base of macroinvertebrates and fishes and on the structure of their assemblages. Macrophytes are also a perfect refugium, where some fish species may avoid the pressure of predators, and a place for laying eggs, which is a reason for the dominance of phytophils in macrophytes. In the whole study section, not only among aquatic plants, a permanent trend of increasing densities of eurytopic and stagnophilic species (mainly perch and roach) and decreasing densities of rheophils is observed.
Authors and Affiliations
Joanna Lik, Małgorzata Dukowska, Eliza Szczerkowska-Majchrzak, Maria Grzybkowska
Keywords
Related Articles
- EP ID EP72801
- DOI 10.12823/sapaa.0860-648X.14005
- Views 146
- Downloads 0
Zmiany w ichtiofaunie dorzecza Słupi w okresie od 1998 do 2009 roku
The fish fauna of the Słupia River system was monitored in the same 65 sites in three sampling periods: 1998–1999, 2003–2004, and 2008–2009. The number of identified fish species was 25 in the first and second and 28 in...
Ichtiofauna dorzecza Motławy
The fish fauna composition was investigated in the Motława River system by the electrofishing method from August to October 2010. A total of 6196 fish and lampreys individuals representing 31 species were captured in 57...
Ichtiofauna Bugu
The Bug River is the longest tributary (772 km) of the Narew River. The present study describes and analyses the fish fauna of three river sections, whose total length is 587 km. The first section flows along the border...
Ichtiofauna lewobrzeżnych dopływów polsko-ukraińskiego odcinka Bugu
The fish fauna of tributaries of the Polish-Ukrainian section of the Bug River was investigated in August 2008. At 38 sampling sites a total of 5995 individuals representing 26 species were collected by electrofishing. T...
Analiza wielkości presji wędkarskiej oraz poziomu wprowadzanych biogenów w zanętach w wodach zlewni środkowej i dolnej Drawy
A questionnaire survey was performed to estimate the angling pressure on fish in the mid-sized Drawa River system, north-western Poland, and to asses the potential threat ensuing from anglers’ usage of groundbait. The re...