Počet záznamů: 1  

Spatial and temporal changes of benthic macroinvertebrate assemblages in acidified streams in the Bohemian Forest (Czech Republic)

  1. 1.
    0385283 - BC 2013 RIV GB eng J - Článek v odborném periodiku
    Svobodová, Jana - Matěna, Josef - Kopáček, Jiří - Poláková, S. - Vrba, J.
    Spatial and temporal changes of benthic macroinvertebrate assemblages in acidified streams in the Bohemian Forest (Czech Republic).
    Aquatic Insects. Roč. 34, č. 1 (2012), s. 157-172. ISSN 0165-0424. E-ISSN 1744-4152.
    [European Congress of Entomology /9./. Budapest, 22.08.2010-27.08.2010]
    Grant CEP: GA ČR(CZ) GA206/07/1200
    Výzkumný záměr: CEZ:AV0Z60170517
    Klíčová slova: atmospheric acidification * stream recovery * Lake Laka * Lake Čertovo
    Kód oboru RIV: EH - Ekologie - společenstva
    Impakt faktor: 0.358, rok: 2012

    Outflows from two atmospherically acidified lakes in the Bohemian Forest were studied in 2005 and 2007. While Lake Čertovo has been strongly acidified (pH 4.6), Lake Laka was only slightly acidified in the past and is recovering now (pH 5.2). The water chemistry and macrozoobenthos composition were analysed along longitudinal gradients of both lake outflows to determine the present status of their streams. A certain progression in stream chemistry to more neutral conditions was observed along the longitudinal gradients of both streams. However, a possible recovery of macrozoobenthos was evident only in the Lake Laka outflow, mainly via an increasing number of Ephemeroptera and Trichoptera taxa, and an increasing number of Gammarus fossarum, both along the longitudinal gradient and during the period of study. In contrast, no considerable changes were observed in the macrozoobenthos composition of the Lake Čertovo outflow, presumably because its chemistry was harmful for acidosensitive taxa such as Ephemeroptera and Trichoptera. Plecoptera and Chironomidae were the most numerous groups in this stream. The biological recovery of both streams will depend on further chemical improvement in their catchments as well as on the dispersal ability of benthic organisms.
    Trvalý link: http://hdl.handle.net/11104/0214589

     
     
Počet záznamů: 1  

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