Overwintering effects on the spring bloom dynamics of phytoplankton.

Fang, Xiaoqi and Sommer, Ulrich (2017) Overwintering effects on the spring bloom dynamics of phytoplankton. Open Access Journal of Plankton Research, 39 (5). pp. 772-780. DOI 10.1093/plankt/fbx046.

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Supplementary data:

Abstract

The influence of winter on the selection of dominant taxa for the phytoplankton spring bloom was studied in batch culture experiments. Different natural phytoplankton assemblages from different phases of the temperate zone winter were exposed to varying periods of darkness (0, 6/7, 13 and 19 weeks) followed by a re-exposure to saturating light intensity for 14 days to experimentally simulate the onset of spring. The results showed that dark incubation has a strong effect on shaping the phytoplankton community composition. Many taxa disappeared in the absolute darkness. Dark survival ability might be an important contributing factor for the success of diatoms in spring. Different phytoplankton starting assemblages were dominated by the same bloom-forming diatoms, Skeletonema marinoi and Thalassosira spp., after dark incubation for only 6 weeks, irrespective of the high dissimilarities between phytoplankton communities. The growth capacity of surviving phytoplankton is almost unimpaired by darkness. Similar growth rates as that before darkness could be resumed for the surviving taxa with a potential lag time of 1–7 days dependent on taxon and the duration of darkness.

Document Type: Article
Keywords: phytoplankton; overwintering; spring bloom; dark survival
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1093/plankt/fbx046
ISSN: 0142-7873
Date Deposited: 06 Sep 2017 12:46
Last Modified: 01 Feb 2019 15:16
URI: http://oceanrep.geomar.de/id/eprint/39272

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