Environmental influences on the pore density of Bolivina spissa (Cushman).

Glock, Nikolaas, Eisenhauer, Anton , Milker, Yvonne, Liebetrau, Volker, Schönfeld, Joachim, Mallon, Jürgen, Sommer, Stefan and Hensen, Christian (2011) Environmental influences on the pore density of Bolivina spissa (Cushman). Journal of Foraminiferal Research, 41 (1). pp. 22-32. DOI 10.2113/gsjfr.41.1.22.

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The pore-densities (PD) in the tests of 232 specimens of the shallow infaunal foraminiferal species Bolivina spissa from eight locations off the Peruvian continental margin were investigated and compared to different environmental factors as water-depth, temperature, bottom-water oxygen ([O2]BW) and nitrate concentrations ([NO3–]BW). There is a negative exponential PD-[O2]BW correlation, but at oxygen-concentrations >10 µmol/l PD approaches a constant value without any further correlation to [O2]BW. The PD-[NO3–]BW relationship is better constrained than that for PD-[O2]BW. We hypothesize that the pores in the tests of B. spissa largely reflect the intracellular nitrate, and to a smaller extent the oxygen respiration. We also compared PD and porosity (P) of two single B.spissa and B.seminuda specimens from the same habitat. The comparison showed that P is significantly higher in B.seminuda than in B. spissa indicating that B.seminuda is much better adapted to strong oxygen-depleted habitats than B.spissa.

Document Type: Article
Keywords: Meereswissenschaften; Paleoceanography; Marine Biology; Biogeochemistry; Hypoxic environments, Foraminifera, Proxies, Geomicrobiology, Micropaleontology, Pacific Ocean, OMZ; Bolivina Spissa (Cushman)
Research affiliation: OceanRep > SFB 754
OceanRep > SFB 754 > B7
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.2113/gsjfr.41.1.22
ISSN: 0096-1191
Projects: SFB754
Date Deposited: 09 Feb 2011 08:54
Last Modified: 23 Sep 2019 20:13
URI: http://oceanrep.geomar.de/id/eprint/10967

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