Deoxygenation impacts on Baltic Sea cod: Dramatic declines in ecosystem services of an iconic keystone predator.

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Date: Mar. 2022
From: Ambio(Vol. 51, Issue 3)
Publisher: Springer
Document Type: Report; Brief article
Length: 237 words

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Keywords: Baltic Sea; Cod (Gadus morhua); Deoxygenation; Ecosystem services; Hypoxia; Maximum length Abstract The intensified expansion of the Baltic Sea's hypoxic zone has been proposed as one reason for the current poor status of cod (Gadus morhua) in the Baltic Sea, with repercussions throughout the food web and on ecosystem services. We examined the links between increased hypoxic areas and the decline in maximum length of Baltic cod, a demographic proxy for services generation. We analysed the effect of different predictors on maximum length of Baltic cod during 1978--2014 using a generalized additive model. The extent of minimally suitable areas for cod (oxygen concentrationâ¥1 ml l.sup.-1) is the most important predictor of decreased cod maximum length. We also show, with simulations, the potential for Baltic cod to increase its maximum length if hypoxic areal extent is reduced to levels comparable to the beginning of the 1990s. We discuss our findings in relation to ecosystem services affected by the decrease of cod maximum length. Author Affiliation: (1) Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, Turistgatan 5, 453 30, Lysekil, Sweden (2) Department of Aquatic Resources, Institute of Coastal Research, Swedish University of Agricultural Sciences, Skolgatan 6, 742 42, Öregrund, Sweden (3) College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA (a) alessandro.orio@slu.se Article History: Registration Date: 05/03/2021 Received Date: 01/22/2021 Accepted Date: 05/03/2021 Online Date: 06/01/2021 Byline:

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Gale Document Number: GALE|A690942296