International Council for the Exploration of the Sea
Browse
ICES Marine Science Symposia - Volume 219 - 2003 - Part 71 of 75.pdf (1.41 MB)

Baltic Sea benthos in the 1990s: a comparison of the distribution of oxygen deficiency and macrozoobenthos communities

Download (1.41 MB)
report
posted on 2023-01-16, 19:43 authored by Ari O. Laine, Susanne Unverzagt

Semi-perm anent oxygen deficiency characterizes large areas of the Central Baltic Sea. In this study, changes in the depth and area of hypoxia and anoxia and consequent variability in macrozoobenthos are described for the 1990s. The early 1990s are characterized by the end of a long stagnation period with relatively restricted but severe anoxia in the very deep areas. The inflow events in 1993-1994 caused a tempo­rary improvement but led quickly to stronger stratification and consequent expansion of the area suffering oxygen depletion. Consequently, the state of the macrotauna communities had deteriorated by the end of the 1990s compared with the beginning of the decade. Different communities (abundance, species composition) were found between areas with different oxygen states, indicating the ecological im portance of oxygen conditions in the deep Baltic.

Article from Marine Science Symposia Vol. 219 - "Hydrobiological variability in the ICES Area, 1990-1999", symposium held in Edinburgh, 8-10 August 2001. To access  the remaining articles please click on the keyword "MSS Vol. 219". 

History

Series

ICES Marine Science Symposia

Volume

219

ISSN

2708-9216

Recommended citation

Laine, A. O., and Unverzagt, S. 2003. Baltic Sea benthos in the 1990s: a comparison of the distribution of oxygen deficiency and macrozoobenthos communities. ICES Marine Science Symposia, 219: 437-439. https://doi.org/10.17895/ices.pub.19271966