Living (Stained) Benthic Foraminiferal Response to Primary Production and Hydrography in the Deepest Part of the Gullmar Fjord, Swedish West Coast, With Comparisons to Hoglund's 1927 Material

Research Article| January 01, 2001 LIVING (STAINED) BENTHIC FORAMINIFERAL RESPONSE TO PRIMARY PRODUCTION AND HYDROGRAPHY IN THE DEEPEST PART OF THE GULLMAR FJORD, SWEDISH WEST COAST, WITH COMPARISONS TO HÖGLUND'S 1927 MATERIAL Mikael Gustafsson; Mikael Gustafsson Department of Earth Sciences, Oceanography, Göteborg University, PO Box 460, SE-405 30 Göteborg, Sweden Search for other works by this author on: GSW Google Scholar Kjell Nordberg Kjell Nordberg Department of Earth Sciences, Oceanography, Göteborg University, PO Box 460, SE-405 30 Göteborg, Sweden Search for other works by this author on: GSW Google Scholar Author and Article Information Mikael Gustafsson Department of Earth Sciences, Oceanography, Göteborg University, PO Box 460, SE-405 30 Göteborg, Sweden Kjell Nordberg Department of Earth Sciences, Oceanography, Göteborg University, PO Box 460, SE-405 30 Göteborg, Sweden Publisher: Cushman Foundation for Foraminiferal Research Received: 15 Oct 1999 Accepted: 24 Apr 2000 First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2001 Journal of Foraminiferal Research Journal of Foraminiferal Research (2001) 31 (1): 2–11. https://doi.org/10.2113/0310002 Article history Received: 15 Oct 1999 Accepted: 24 Apr 2000 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Mikael Gustafsson, Kjell Nordberg; LIVING (STAINED) BENTHIC FORAMINIFERAL RESPONSE TO PRIMARY PRODUCTION AND HYDROGRAPHY IN THE DEEPEST PART OF THE GULLMAR FJORD, SWEDISH WEST COAST, WITH COMPARISONS TO HÖGLUND'S 1927 MATERIAL. Journal of Foraminiferal Research 2001;; 31 (1): 2–11. doi: https://doi.org/10.2113/0310002 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Living (stained) benthic foraminifera were studied in the deepest part (116 m) of the classical marine study area, the Gullmar Fjord on the Swedish west coast. This is a silled fjord with a strongly stratified water column where stagnant conditions temporarily develop in the deeper parts. The aim of this study is to determine how the living foraminiferal assemblage develops with seasonal variations in bottom water hydrography and primary production in the surface water. From August 1993 to December 1994, monthly hydrographic and oxygen measurements were made. Parallel undisturbed sediment cores were taken using a Multiple-corer. Foraminifera from the >63 μm fraction were stained with Rose Bengal to separate living from dead specimens. Monthly values of the surface water chlorophyll a content were also available and give a measure of the primary production. During spring 1994 the dominant foraminiferal species, Stainforthia fusiformis, multiplied its population size by seven times during one month as a consequence of food input from the spring phytoplankton bloom. The abundance of this species correlates positively with the surface water chlorophyll a content. Populations of several other species also increased during the spring of 1994. A deep-water inflow in February 1994 may have triggered reproduction of several foraminiferal species, recognized as a temporary population decline. We also compared our results with Höglund's (1947) foraminiferal study, performed in the same area in the summer of 1927. We found that a major alteration trending towards a more opportunistic low oxygen tolerant fauna has occurred since then. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.