Repetitive baselines of phytoplankton succession in an unstably stratified temperate lake (Lake Erken, Sweden): a long-term analysis

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• 作者：Yang Yang ; Kurt Pettersson ; Judit Padis谩k
• 关键词：Phytoplankton dynamics ; Water column stability ; Meroplanktonic diatom ; Gloeotrichia echinulata ; Decision trees
• 刊名：Hydrobiologia
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：764
• 期：1
• 页码：211-227
• 全文大小：1,330 KB
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• 作者单位：Yang Yang (1)
  Kurt Pettersson (1)
  Judit Padis谩k (2) (3)
  
  1. Erken Laboratory, Department of Ecology and Genetics, Uppsala University, Norra Malmav盲gen 45, 761 73, Norrt盲lje, Sweden
  2. Department of Limnology, University of Pannonia, Egyetem u.10, 8200, Veszpr茅m, Hungary
  3. MTA-PE Limnoecology Research Group, Egyetem u.10, 8200, Veszpr茅m, Hungary
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Hydrobiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5117

文摘

The seasonal development of phytoplankton is a sequence of consecutive events with waxes and wanes of biomass and compositional shifts. This study analyzed 16 years data in Lake Erken, Sweden and revealed four baselines of phytoplankton succession with their underlying drivers. Results showed that there were two diatom-dominated phases annually. The vernal community was dominated by centric diatoms larger than 15 碌m (functional groups B and C) which were fast-growing diatoms being highly efficient in the use of nutrients. The autumn community was comprised mainly meroplanktonic mixing-dependent Aulacoseira granulata and Fragilaria sp. (MP and P) or/and large centric diatoms (B). Between the two mixing-phases with diatoms, a Gloeotrichia echinulata (H 2) bloom occurred due to its preference for a stratified water column with elevated water temperatures and high light availability. The summer stratification in Lake Erken was weak and short, thus, favoring meroplanktonic diatoms to peak once the lake turned over in early autumn. Lake Erken represents an intermediate case between a highly mixed polymictic lake and a lake with strong summer stratification, where the observed stratification patterns allowed the development of an autumn diatom phase similar, by extent, to the vernal one and mainly dominated by meroplanktonic diatoms. Keywords Phytoplankton dynamics Water column stability Meroplanktonic diatom Gloeotrichia echinulata Decision trees