Sequenced clone
Chapter 7 “Responses of Different Antarctic Genotypes of Phaeocystis antarctica to three salinities: Evidence for Ecosystem Resilience”
Relying on genetic data I started to consider physiological parameters. The four regions sampled for genetic analysis were not genetically isolated. This finding led us to assess (1) whether genetically closely related strains originating from different geographic regions in the Southern ocean react similarly to changes in environmental conditions or (2) whether the environment is more important in setting physiological constraints (phenotype) than the genotype. In order to test both hypotheses, we conducted experiments on growth, photosynthetic efficiency (Fv/Fm) and DMSP content from five P. antarctica strains from three different Antarctic regions: Prydz Bay, Ross Sea (both ice covered most of the year) and Scotia Sea (open water, little influence from sea ice).
Authors’ contributions
Gäbler-Schwarz S, Beszteri B, Gindulis JS, Hinz F, Nöthig EM, Wesche C, Kirst GO and Medlin LK (2008). “Responses of Different Antarctic Genotypes of Phaeocystis antarctica to three salinities: Evidence for Ecosystem Resilience. Marine Ecology Progress Series.
submitted.
The experiments were planned together with Janina S. Gindulis, Eva M. Nöthig, Gunther O.
Kirst and Linda K. Medlin and performed by me. I conducted all laboratory experiments, interpreted and wrote the manuscript in discussion with the co-authors. Friedel Hinz helped with microscopic photo documentation during the laboratory experiments. Bank Beszteri provided help in bioinformatics analysis and in producing the R-figures. Christine Wesche provided help with glaciological data interpretation and redrawed the maps for Fig. 2 & 7 in this chapter.
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Submitted July 8th 2009 to Journal of Phycology