湿地提供许多生态服务,是水生动植物的主要栖息地。在贝莱丹加湿地,目前的研究进行了3年,从2019年7月到2021年6月,评估理化参数对浮游植物多样性和丰度模式的季节性影响。总共观察到浮游植物48属。芽孢杆菌科(27%)对浮游植物总密度的贡献最大。浮游植物的总丰度在季风期间最高(4.081×103单位l-1),在季风后最低(3.316×103单位l-1)。单因素方差分析显示某些属存在显著的季节差异(p<0.05)。这项研究给出了影响最大的物理化学参数(溶解氧,浊度,总硬度,Ca2+,和总氮)借助不同的多元和单变量分析(典型对应分析和卡尔·皮尔森的相关性)对浮游植物的生长。该研究再次强调,气候参数(温度和降雨)对浮游植物群有一定影响。我们的研究承认,在所有三个季节中,所研究湿地中的N:P均小于Redfield比率(16:1)。而在季风前注意到Si:P比在较高的范围内(15:1)。注意到Shannon多样性指数和Margalef的物种丰富度指数的值>3,这表明浮游植物的多样性相当丰富。但是藻类污染指数的价值,它描述了基于当前藻类属的生态污染水平,在所有季节都观察到高,指示有机负荷。因此,将来研究的湿地可能会受到人为活动的影响。因此,为了水体的可持续生物多样性,需要控制和调节人为活动(农业耕作和集约化)和大型植物。
Wetlands provide numerous ecological services and are key habitats for aquatic flora and fauna. In the Beledanga wetland, the current study was conducted for 3 years, from July 2019 to June 2021, to evaluate the seasonal influence of physicochemical parameters on
phytoplankton diversity and abundance patterns. Overall 48 genera of
phytoplankton were observed. Bacillariophyceae (27%) contributed the maximum to the total
phytoplankton density. The total abundance of
phytoplankton was found utmost during monsoon (4.081 × 103 unit l-1) and least during post-monsoon (3.316 × 103 unit l-1). One-way analysis of variance indicated significant seasonal differences (p < 0.05) for some genera. The study gave the idea about the most influencing physic-chemical parameters (dissolved oxygen, turbidity, total hardness, Ca2+, and total nitrogen) on the growth of
phytoplankton with the help of different multivariate and univariate analysis (canonical correspondence analysis and Karl Pearson\'s correlation). The study again highlighted that climate parameters (temperature and rainfall) had some effect on the phytoplanktonic groups. Our study conceded that N:P in the studied wetland was less than the Redfield ratio (16:1) in all three seasons, while the Si:P ratio was noticed in the high range (15:1) during pre-monsoon. The value of the Shannon diversity index and Margalef\'s species richness index were noticed to be > 3, which signified quite rich in phytoplankton diversity. But the value of Algal Pollution Index, which describes the ecological pollution level based on the present algal genera was observed high throughout all seasons, indicating organic load. So in future the studied wetland may get adversely affected with influence of anthropogenic activities. Therefore, for sustainable biodiversity of the waterbody, the anthropogenic activities (retting and intensification of agricultural farming) and macrophytes need to be controlled and regulated.