Holmgren, Kerstin
- Institutionen för akvatiska resurser (SLU Aqua), Sveriges lantbruksuniversitet
Sammanfattning
Since the 1980s, Swedish lakes have in general become less acidified. Assessment of biological recovery is, however, hampered by poor pre-acidification data, confounding effects of climate change, and few lakes with annual sampling of fish and other organisms. Only three critically acidified, but non-limed, lakes had two decades of fish monitoring. The lakes had not yet recovered to pre-industrial chemical targets. Fish had low species richness compared to other organism groups. Roach (Rutilus rutilus) and/or European perch (Perca fluviatilis) were the dominant fish species, and the acid-sensitive roach had been lost from one of the lakes. Calcium decreased, possibly approaching pre-acidification concentrations, but exceeded minimum levels needed to sustain some Daphnia species. High or increasing levels of total organic carbon, likely due to reduced acidification and climate change, might influence the biological communities in unexpected ways, for example, facilitating more frequent occurrence of the invasive algae Gonyostomum semen.
Nyckelord
Acidification; Lakes; Time series; Biological recovery; Dominant species
Publicerad i
AMBIO: A Journal of the Human Environment
2014, volym: 43, sidor: 19-29
SLU författare
Associerade SLU-program
Sjöar och vattendrag
Försurning
Globala målen (SDG)
SDG6 Rent vatten och sanitet för alla
SDG13 Bekämpa klimatförändringarna
UKÄ forskningsämne
Ekologi
Publikationens identifierare
- DOI: https://doi.org/10.1007/s13280-014-0559-y
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/63056