The role of climate and fisheries on the temporal changes in the Bothnian Bay foodweb

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Hekim, ZeynepSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources (author)

The role of climate and fisheries on the temporal changes in the Bothnian Bay foodweb

Article/chapterEnglish2016

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2016-03-16
Oxford University Press (OUP),2016
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LIBRIS-ID:oai:DiVA.org:su-133226
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-133226URI
https://doi.org/10.1093/icesjms/fsw032DOI
https://res.slu.se/id/publ/79888URI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Climate change, eutrophication, and fishing are main pressures associated with changes in the abiotic and biotic environment in several sub-basins of the Baltic Sea. Identifying the nature of such changes is of relative importance for fisheries and environmental management. The Bothnian Bay is the northernmost sub-basin in the Baltic Sea and the responses of the foodweb to long-term changes in combined pressures have not been investigated. In this study, we explore long-term changes in the Bothnian Bay foodweb, represented by key species across all trophic levels over the past 34 years, and identify potential environmental and anthropogenic drivers. The results indicate that salinity is the most important driver to explain changes in the composition of the offshore biota in the Bothnian Bay. These changes are probably driven by indirect effects of salinity rather than bottom-up effects. A decline in the herring spawning-stock biomass was most plausibly attributed to an increased competition for food due to a parallel increase in vendace, which uses the same food resources (zooplankton and zoobenthos) and may benefit from declining salinity due to its limnic origin. A strong increase in the abundance of grey seal and ringed seal populations was seen in the late 2000s but was not related to any of the pressure variables analysed. Temperature and nutrients were not identified as important drivers of changes in the overall biota. Our study explores correlative relationships between variables and identifies potential interactions in the foodweb to generate hypotheses for further studies.

Subject headings and genre

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Fisk- och akvakulturforskning hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Fish and Aquacultural Science hsv//eng
climate
fisheries
grey seal
herring spawning-stock biomass
ringed seal
salinity

Added entries (persons, corporate bodies, meetings, titles ...)

Gårdmark, AnnaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)48860 (author)
Karlsson, AgnesSveriges lantbruksuniversitet,Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi,Swedish University of Agricultural Sciences, Sweden,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)104996 (author)
Kauppila, Pirkko (author)
Bergenius, MikaelaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)47342 (author)
Bergström, LenaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)49755 (author)
Sveriges lantbruksuniversitetInstitutionen för akvatiska resurser (creator_code:org_t)
Sveriges lantbruksuniversitet

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In:ICES Journal of Marine Science: Oxford University Press (OUP)73:7, s. 1739-17491054-31391095-9289

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By the author/editor: Hekim, Zeynep; Gårdmark, Anna; Karlsson, Agnes; Kauppila, Pirkko; Bergenius, Mikae ...; Bergström, Lena

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AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Fish and Aquacul ...

Articles in the publication: ICES Journal of ...

By the university: Stockholm University; Swedish University of Agricultural Sciences

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