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1 November 2010 Indications of Recovery from Hypoxia in the Inner Stockholm Archipelago
O. Magnus Karlsson, Per O. Jonsson, Dan Lindgren, J. Mikael Malmaeus, Anders Stehn
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Abstract

Improved benthic conditions compared to the 1990s were found during benthic investigations, including sediment and benthic macrofauna in the inner Stockholm archipelago during 2008. In the 1990s, these areas were dominated by black and laminated surface sediments and very sparse fauna. A clear relationship was found when comparing sediment status with the benthic macrofauna. Reduced surface sediment and impoverished macroinvertebrate community was only found at one sampling station representing an enclosed part of the inner archipelago, whereas the other seven stations, with depths ranging from 20 to 50 m, had oxidized surface sediments and considerable biomasses of benthic macrofauna (6–65 g m-2) dominated by the invading polychaete Marenzelleria neglecta. An extrapolation of the results shows that, within the investigated area, the coverage of reduced surface sediments had decreased from approximately 17% in the late 1990s to 4% in 2008.

© Royal Swedish Academy of Sciences 2010
O. Magnus Karlsson, Per O. Jonsson, Dan Lindgren, J. Mikael Malmaeus, and Anders Stehn "Indications of Recovery from Hypoxia in the Inner Stockholm Archipelago," AMBIO: A Journal of the Human Environment 39(7), 486-495, (1 November 2010). https://doi.org/10.1007/s13280-010-0079-3
Received: 22 April 2009; Accepted: 24 May 2010; Published: 1 November 2010
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KEYWORDS
Benthic macrofauna
hypoxia
Laminated sediments
Nutrient budgets
Stockholm archipelago
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