Recovery of acidified lakes in Finland and subsequent responses of perch and roach populations

Show full item record



Permalink

http://hdl.handle.net/10138/165177

Citation

Rask , M , Vuorenmaa , J , Nyberg , K , Tammi , J , Mannio , J , Olin , M , Kortelainen , P , Raitaniemi , J & Vesala , S 2014 , ' Recovery of acidified lakes in Finland and subsequent responses of perch and roach populations ' , Boreal Environment Research , vol. 19 , no. 3 , pp. 222-234 .

Title: Recovery of acidified lakes in Finland and subsequent responses of perch and roach populations
Author: Rask, Martti; Vuorenmaa, Jussi; Nyberg, Kari; Tammi, Jouni; Mannio, Jaakko; Olin, Mikko; Kortelainen, Pirkko; Raitaniemi, Jari; Vesala, Sami
Contributor organization: Environmental Sciences
Date: 2014-06-30
Language: eng
Number of pages: 13
Belongs to series: Boreal Environment Research
ISSN: 1239-6095
URI: http://hdl.handle.net/10138/165177
Abstract: Finnish-lake and fish-status surveys indicated that 4900 small headwater lakes suffered from acidic deposition and 1600–3200 roach (Rutilus rutilus) and perch (Perca fluviatilis) populations were affected or extinct by the end of 1980s. Since the late 1980s, successful sulphur emission reductions in Europe have induced a chemical recovery of acidified lakes. This resulted in decreases in sulphate and labile aluminium concentrations and increases in pH and alkalinity during the 1990s. The first signs of recovery in affected perch populations were observed in the early 1990s. New strong year-classes appeared and the population structure returned to normal. Little if any recovery of the affected populations of the more acid-sensitive species, roach, was recorded. This may have been due to still critical water quality conditions for successful reproduction of sensitive roach and/or organic acid episodes in the 2000s, suppressing the recovery of buffering capacity.
Subject: DISSOLVED ORGANIC-CARBON
SMALL FINNISH LAKES
RUTILUS-RUTILUS
CLIMATE-CHANGE
INTERSPECIFIC COMPETITION
RELATIVE ABUNDANCES
SOUTHERN FINLAND
FISH POPULATIONS
FOREST LAKES
WATER COLOR
1172 Environmental sciences
Peer reviewed: Yes
Rights: other
Usage restriction: openAccess
Self-archived version: publishedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
ber19_222.pdf 683.5Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record