Changes in zoobenthic community structure after pollution abatement from fish farms in the Archipelago Sea (N. Baltic Sea)

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Kraufvelin P, Sinisalo B, Leppakoski E, Mattila J, Bonsdorff E
Publisher: ELSEVIER SCI LTD
Publication year: 2001
Journal: Marine Environmental Research
Journal acronym: MAR ENVIRON RES
Volume number: 51
Issue number: 3
Start page: 229
End page: 245
Number of pages: 17
ISSN: 0141-1136


Abstract

Long-term changes in sediment macrofauna communities at two sites affected by fish farming in the Archipelago Sea, south-west Finland have been investigated. Sampling stations in the Sarkansalmi Strait and Kaukolanlahti Bay, previously investigated 1982-1991, were revisited in 1994, 1995 and 1998 to detect signs of recovery following a decrease in organic load since 1990 and 1991, respectively. The results indicate a partial recovery in Sarkansalmi during post-pollution years, whereas no improvement has taken place in Kaukolanlahti. The improvement in Sarkansalmi is shown by a significant increase in the number of species and total abundance, and by the community structures becoming more similar over time. On the other hand, a significantly decreased number of species, abundance and biomass values over time as well as the occurrence of defaunated anoxic sediments, are clear signs of continued deterioration in Kaukolanlahti. Differences in the recovery potential of the two water areas are interpreted as consequences of topography and water exchange patterns causing differences in oxygen saturation. (C) 2001 Elsevier Science Ltd. All rights reserved.


Keywords

aquaculture, Baltic Sea, eutrophication, long-term changes, organic enrichment, recovery, sediment macrofauna

Last updated on 2019-16-12 at 03:53