Ahmed Ayaz, Wanganeo Ashwani
Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, 403004, India,
Environ Monit Assess. 2015 Apr;187(4):192. doi: 10.1007/s10661-015-4410-0. Epub 2015 Mar 20.
Bhoj Wetland is tropical freshwater system in central India "Bhopal" serving the citizens as one of the major source of water since its inception. Understanding the process of phytoplankton variation can be particularly useful in water quality improvement and management decision. In this study, phytoplankton taxonomic composition, temporal and spatial distribution, and diversity along with limnological abiotic characteristics were studied based on monthly sampling from four sampling stations (between May 2005 and April 2006). A total of 4 classes, 68 genera, and 98 species which belong to Chlorophyceae (52 species), Cyanobacteria (24 species), Bacillariophyceae (19 species), and Euglenophyceae (3 species), respectively, were identified. Phytoplankton assemblages were dominated by Cyanobacteria during summer months and were the most abundant. On an annual average scale, the phytoplankton density varied between 0.24×10(4) units/l at station 4 to 0.46×10(4) units/l at station 2, and station 2 represented highest population density. The predominant indices of the most predominant species varied between 0.03 and 0.26. Among physicochemical variables, temperature and total dissolved solids played a key role in phytoplankton growth as represented by statistical linear regression drawn between temperature, total dissolved solids, nitrate, and phytoplankton with R2 values of 0.6, 0.46, and 0.5, respectively.
博杰湿地是印度中部“博帕尔”的热带淡水系统，自形成以来一直是市民的主要水源之一。了解浮游植物的变化过程对于水质改善和管理决策可能特别有用。在本研究中，基于2005年5月至2006年4月间从四个采样站每月采集的样本，对浮游植物的分类组成、时空分布、多样性以及湖泊学非生物特征进行了研究。共鉴定出4个纲、68个属和98个物种，分别属于绿藻纲（52种）、蓝藻纲（24种）、硅藻纲（19种）和裸藻纲（3种）。夏季浮游植物群落以蓝藻纲为主，且数量最多。在年平均尺度上，浮游植物密度在4号站为0.24×10⁴个单位/升，在2号站为0.46×10⁴个单位/升，2号站的种群密度最高。最优势物种的优势度指数在0.03至0.26之间变化。在理化变量中，温度和总溶解固体对浮游植物生长起关键作用，这通过温度、总溶解固体、硝酸盐与浮游植物之间的统计线性回归得以体现，其R²值分别为0.6、0.46和0.5。
