The spring phytoplankton in the pelagic zone of Lake Baikal during 2007‒2011
The spring phytoplankton in the pelagic zone of Lake Baikal during 2007‒2011
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2007-2011年贝加尔湖中上层春季浮游植物
DOI：
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发表时间：
2015
影响因子：
0.3
通讯作者：
T. Khodzher
中科院分区：
文献类型：
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作者：
G. I. Popovskaya;M. V. Usol’tseva;V. Domysheva;M. Sakirko;V. Blinov;T. Khodzher
作为以前长期研究的延续，对2007 - 2011年贝加尔湖浮游植物的现状进行了评估。对贝加尔湖浮游植物的种类组成、种群数量、生物量和空间分布进行了调查。2007 - 2011年的量化指标与长期调查数据（1964 - 1990年）进行了比较。结果表明，不同时期浮游植物的种类组成基本保持稳定。2007 - 2011年的种群和生物量值符合长期波动（1964 - 1990）的范围，具有该时期的物种组合特征。与以往的研究一样，春季浮游植物生物量的主要贡献者是硅藻Aulacoseira baicalensis、针杆藻Synedra acus subsp. radians、Aulacoseira islandica和Stephanodiscus meyeri。其最大和最小浓度分别出现在南部和中部湖泊洼地以及贝加尔湖北方。这项研究揭示了浮游植物生物量与硅浓度的相关性;没有相关性与硝酸盐，磷酸盐和温度被确定。
An assessment is made of the current status of the phytoplankton in the pelagic zone of Lake Baikal for 2007‒2011, as the continuation of previous long-term research. We investigated the species composition, population, biomass and spatial distribution of the phytoplankton in the pelagic zone of Baikal. Its quantitative indicators for 2007‒2011 have been compared with data of long-term investigations (1964‒1990). It is shown that the species composition of the phytoplankton remained stable at different periods. The values of population and biomass for 2007‒2011 fitted in the range of long-term fluctuations (1964‒1990), with the species assemblage characteristic for that period. As in the case with previous research, the main contribution to the biomass of the spring phytoplankton in the lake was made by the diatoms Aulacoseira baicalensis, Synedra acus subsp. radians, Aulacoseira islandica, and Stephanodiscus meyeri. Their maximum and minimum concentrations were observed in the southern and middle lake depressions, and in Northern Baikal, respectively. The study revealed a correlation of phytoplankton biomass with silicon concentration; no correlation with nitrates, phosphates and temperature was ascertained.