Brown Trout Natural Colonisation as a Sign of Full Lake Recovery from Acidification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F24%3A43908389" target="_blank" >RIV/60076658:12310/24:43908389 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11270-024-07537-z" target="_blank" >https://link.springer.com/article/10.1007/s11270-024-07537-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11270-024-07537-z" target="_blank" >10.1007/s11270-024-07537-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Brown Trout Natural Colonisation as a Sign of Full Lake Recovery from Acidification

Popis výsledku v původním jazyce

A recent spontaneous return of a native brown trout population in Lake Laka and its tributaries followed the gradual recovery of the Bohemian Forest (Czechia) from atmospheric acidification. The lake had hosted a vibrant brown trout population in the first half of the 20th century, which then became extinct around the 1960s due to strong atmospheric acidification, peaking in the 1980s. However, since the 1990s, a gradual reversibility in acidification has occurred. This positive trend was delayed after tree dieback in the lake catchment in the 2000s. The following detailed monitoring showed recurrent critical periods of low pH and ANC, and elevated concentrations of ionic Al. This was especially in spring, lasting until the late 2010s. Electrofishing from 2020 to 2022 indicated suitable conditions for permanent fish populations. In comparison to previous electrofishing (2005-2010), brown trout colonised Lake Laka and formed a stable population in the lake outflow. Downstream of the lake, the fish abundance remained similar to those some ten years earlier. In contrast to the brown trout, the bullhead was only found in the stream below the lake, as it was unable to migrate to the upper areas due to natural barriers. The recovery of the brown trout population in Lake Laka after the acidification phase is an example of the successful restoration of a disturbed aquatic ecosystem under pristine conditions.

Název v anglickém jazyce

Brown Trout Natural Colonisation as a Sign of Full Lake Recovery from Acidification

Popis výsledku anglicky

A recent spontaneous return of a native brown trout population in Lake Laka and its tributaries followed the gradual recovery of the Bohemian Forest (Czechia) from atmospheric acidification. The lake had hosted a vibrant brown trout population in the first half of the 20th century, which then became extinct around the 1960s due to strong atmospheric acidification, peaking in the 1980s. However, since the 1990s, a gradual reversibility in acidification has occurred. This positive trend was delayed after tree dieback in the lake catchment in the 2000s. The following detailed monitoring showed recurrent critical periods of low pH and ANC, and elevated concentrations of ionic Al. This was especially in spring, lasting until the late 2010s. Electrofishing from 2020 to 2022 indicated suitable conditions for permanent fish populations. In comparison to previous electrofishing (2005-2010), brown trout colonised Lake Laka and formed a stable population in the lake outflow. Downstream of the lake, the fish abundance remained similar to those some ten years earlier. In contrast to the brown trout, the bullhead was only found in the stream below the lake, as it was unable to migrate to the upper areas due to natural barriers. The recovery of the brown trout population in Lake Laka after the acidification phase is an example of the successful restoration of a disturbed aquatic ecosystem under pristine conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA22-05421S" target="_blank" >GA22-05421S: Vliv dostupnosti dusíku a stavu lesa na půdní mikrobiom, cykly prvků a biologické zotavování acidifikovaných vod v horkých ekosystémech.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Water Air and Soil Pollution

ISSN

0049-6979

e-ISSN

1573-2932

Svazek periodika

235

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

001327012000002

EID výsledku v databázi Scopus

2-s2.0-85205996321