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Spatial and temporal dynamics of phytoplankton in association with habitat parameters in a tropical reservoir, India
Arabian Journal of Geosciences ( IF 1.827 ) Pub Date : 2021-05-06 , DOI: 10.1007/s12517-021-07194-0
Jesna Parakkandi , Ajoy Saha , Uttam Kumar Sarkar , Basanta Kumar Das , Mishal Puthiyottil , Sajina Aliyamintakath Muhammadali , Mitesh Ramteke , Canciyal Johnson , Suman Kumari

Phytoplankton, the primary producers in an aquatic ecosystem, also act as indicators of pollution by alterations in species composition and population structure. Study on plankton dynamics in relation to environment forms the base of any aquatic ecosystem management. So, a study on the variations in the plankton population influenced by abiotic factors was conducted in the Paleru Reservoir, India. A total of 48 plankton genera belonging to 9 classes were recorded. The Shannon-Wiener diversity index ranged from 1.098 to 2.615 with temporal variations. Plankton density showed significant (p ≤ 0.05) spatial variations with the highest density at the cage site irrespective of the season (4.126 × 105 ± 199 cells/litre, 2.814 × 105 ± 72.5 cells/litre and 3.197 × 105 ± 52.5 cells/litre during pre-monsoon, monsoon and post-monsoon, respectively). Seasonal analysis revealed significantly (p ≤ 0.05) high plankton density during pre-monsoon, followed by post-monsoon and monsoon respectively. The reservoir is moderately polluted as established from the diversity index and the Algal Genus Pollution Index except at the cage site where it receives a polluted status. The relationship of plankton distribution with the environment was established employing canonical correspondence analysis and correlation coefficient. Phosphate-P, nitrate-N, transparency, hardness, pH and dissolved oxygen are the major abiotic factors influencing the plankton distribution in Paleru. Even though Cyanophyceae dominated the plankton population, there was no plankton bloom-associated toxicity, indicating the health and dynamic nature of the reservoir. However, significantly high plankton density indicating a polluted status at the cage site reveals the influence of cage culture.



中文翻译:

印度热带水库中浮游植物的时空动态及其与栖息地参数的关系

浮游植物是水生生态系统的主要生产者,它还通过改变物种组成和种群结构而成为污染的指标。对与环境有关的浮游生物动力学的研究构成了任何水生生态系统管理的基础。因此,在印度的帕勒鲁水库对非生物因素影响的浮游生物种群变化进行了研究。总共记录了属于9类的48个浮游生物属。香农-维纳多样性指数随时间变化在1.098至2.615的范围内。浮游生物密度表明显著(p ≤0.05)与在轿厢的网站上的季节(4.126×10,而不管最高密度的空间变化5 ±199个细胞/升,2.814×10 5 ±72.5个细胞/升和3.197×10在季风前,季风和季风后分别为5 ±52.5个/升。季节性分析显示显着(p≤0.05)季风前高浮游生物密度,季风后分别为季风后。根据多样性指数和藻类污染指数确定的水库为中度污染,除了网箱处受到污染的位置以外。利用规范对应分析和相关系数,建立了浮游生物分布与环境的关系。磷酸盐-P,硝酸盐-N,透明度,硬度,pH和溶解氧是影响帕勒鲁浮游生物分布的主要非生物因素。即使蓝藻科在浮游生物种群中占主导地位,也没有与浮游生物开花相关的毒性,表明该水库的健康和动态性质。然而,

更新日期:2021-05-06
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