Impact of multiple stressors on the fish community pattern along a highly degraded Central European river - a case study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F21%3A00541421" target="_blank" >RIV/68081766:_____/21:00541421 - isvavai.cz</a>

Result on the web

<a href="https://bioone.org/journalArticle/Download?fullDOI=10.25225%2Fjvb.20066" target="_blank" >https://bioone.org/journalArticle/Download?fullDOI=10.25225%2Fjvb.20066</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.25225/jvb.20066" target="_blank" >10.25225/jvb.20066</a>

Result language

angličtina

Original language name

Impact of multiple stressors on the fish community pattern along a highly degraded Central European river - a case study

Original language description

In this study, we provide a descriptive assessment of how chemical and hydro-morphological stressors have affected the fish community along one of the most impacted rivers in Central Europe. In addition to the toxicity of combined pollutants (expressed in toxic units), a range of hydro-morphological characteristics were measured to assess which stressors have had an impact. No longitudinal spatial trend was observed in fish assemblage characteristics as individual sites were affected by different stressors. Instead, five largely artificial assemblage 'zones' were identified corresponding to different combinations of stressors. Water quality (principally dissolved O-2) and hydromorphology were the main drivers affecting fish presence and density, with self-purification processes, restocking from tributaries and geomorphology promoting fish survival and/or recovery, despite increasing toxic pressure downstream. Our results suggest that a) toxic units alone are insufficient to establish causative factors in fish community loss as they do not take account of hydro-morphological stressors, many of which interact with and/or mask each other, and b) that a single WFD monitoring site in such heavily impacted rivers is insufficient to assess ecological status, rather, the ecological status of specific 'zones' (identified based on fish assemblage structure, habitat and water quality) should be assessed, with the ultimate aim of merging the zones and returning the river to a single functioning longitudinal ecosystem, accepting that this is unlikely to resemble the natural pre-industrial status of the river.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10613 - Zoology

Project

<a href="/en/project/GBP505%2F12%2FG112" target="_blank" >GBP505/12/G112: ECIP - European Centre of Ichtyoparasitology</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Vertebrate Biology

ISSN

2694-7684

e-ISSN

2694-7684

Volume of the periodical

70

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

18

Pages from-to

20066

UT code for WoS article

000626107000001

EID of the result in the Scopus database

2-s2.0-85102874453