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Effects of winter severity on spring phytoplankton development in a temperate lake (Lake Erken, Sweden)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics.
Univ Pannonia, Dept Limnol, Egyet U 10, H-8200 Veszprem, Hungary..
Univ Pannonia, Dept Limnol, Egyet U 10, H-8200 Veszprem, Hungary.;MTA PE Limnoecol Res Grp, Egyet U 10, H-8200 Veszprem, Hungary..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics.
2016 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 780, no 1, 47-57 p.Article in journal (Refereed) Published
Abstract [en]

Phytoplankton seasonal succession has been linked to a variety of serial environmental changes, especially weather- and climate-induced physical forcing. This study compared spring phytoplankton dynamics after winters of different severity (cold, normal, and warm) in Lake Erken, Sweden. The spring diatom bloom was dominated by different functional groups: group A (centric diatoms 5-10 mu m) after cold winters, B (centric diatoms > 15 mu m) after normal winters, and P (Aulacoseira granulata, Fragilaria crotonensis) after warm winters. Our results suggest that weather-related processes were the primary external drivers accounting for differences in spring phytoplankton dynamics in Lake Erken. Spring phytoplankton are influenced by overwintering species from the last autumn that can initiate the following spring bloom. Average taxonomic distinctness of the spring community was assessed using a new biodiversity measurement that incorporates taxonomic relatedness information. This value was lower than expected after warm and cold winters, which had winter air temperature 1A degrees C deviation from an average value calculated over 21 years. Such winters increased the level of disturbance or stress to the lake, resulting in a spring with less diverse phytoplankton by narrowing the niche for species with various ecological requirements.

Place, publisher, year, edition, pages
2016. Vol. 780, no 1, 47-57 p.
Keyword [en]
Winter severity, Phytoplankton dynamics, Spring bloom, Stratification, Taxonomic distinctness
National Category
Microbiology Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-305325DOI: 10.1007/s10750-016-2777-8ISI: 000383130200005OAI: oai:DiVA.org:uu-305325DiVA: diva2:1037380
Conference
4th European Large Lakes Symposium (ELLS), AUG 24-28, 2015, Univ Eastern Finland, Joensuu, FINLAND
Available from: 2016-10-14 Created: 2016-10-14 Last updated: 2017-11-29Bibliographically approved

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