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浮游植物可以绕过富营养化沿海水体中的营养物质减少。

Phytoplankton can bypass nutrient reductions in eutrophic coastal water bodies.

机构信息

Institute of Biological Sciences, Applied Ecology and Phycology, Biological Station Zingst, University of Rostock, Mühlenstraße 27, 18374, Zingst, Germany.

Institute of Biological Sciences, Applied Ecology and Phycology, University of Rostock, Albert-Einsteinstraße 3, 18051, Rostock, Germany.

出版信息

Ambio. 2018 Jan;47(Suppl 1):146-158. doi: 10.1007/s13280-017-0980-0.

DOI:10.1007/s13280-017-0980-0
PMID:29164540
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5722746/
Abstract

The EU-water framework directive aims at nutrient reductions, since anthropogenically induced eutrophication is a major threat for coastal waters. However, phytoplankton biomass in southern Baltic Sea coastal water bodies (CWB) remains high and the underlying mechanisms are not well understood. Therefore, a CWB data set was analysed regarding changes in phytoplankton biomass and nutrient concentration of nitrogen (N) and phosphorus (P) from 2000 to 2014. It was expected to find imbalances between produced phytoplankton biomass and total nutrient concentrations. Inner CWB were cyanobacteria-dominated and showed up to five times higher chlorophyll a-concentrations compared to outer CWB with similar total phosphorus-concentrations. Phytoplankton tended to be P-limited during spring and N-limited during summer. Phytoplankton biomass and nutrient concentrations were even higher during very humid years, which indicated a close coupling of the CWB with their catchment areas. This study suggests that re-mesotrophication efforts need to consider the importance of changed phytoplankton composition and nutrient availabilities.

摘要

欧盟水框架指令旨在减少营养物，因为人为引起的富营养化是沿海水域的主要威胁。然而，波罗的海南部沿海水体（CWB）的浮游植物生物量仍然很高，其潜在机制尚不清楚。因此，分析了 2000 年至 2014 年期间浮游植物生物量和氮（N）和磷（P）营养浓度变化的 CWB 数据集。预计会发现产生的浮游植物生物量与总营养浓度之间的不平衡。内部 CWB 以蓝藻为主，与外部 CWB 相比，叶绿素 a 浓度高出五倍，而总磷浓度相似。浮游植物在春季倾向于受到磷限制，而在夏季受到氮限制。在非常潮湿的年份，浮游植物生物量和营养浓度甚至更高，这表明 CWB 与其集水区密切耦合。本研究表明，再富营养化努力需要考虑浮游植物组成和养分可利用性变化的重要性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/14d157b807c9/13280_2017_980_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/8f5914cd7dc3/13280_2017_980_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/1fd179e16ff1/13280_2017_980_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/2c63ab045fd2/13280_2017_980_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/aa4cffe27f3f/13280_2017_980_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/14d157b807c9/13280_2017_980_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/8f5914cd7dc3/13280_2017_980_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/1fd179e16ff1/13280_2017_980_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/2c63ab045fd2/13280_2017_980_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/aa4cffe27f3f/13280_2017_980_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a1bf/5722746/14d157b807c9/13280_2017_980_Fig5_HTML.jpg

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