Effect of groundwater nutrients on coastal phytoplankton community composition in the Bay of Bengal, India: An experimental study

被引：1
|
作者：
Rao, D. Bhaskara [1 ]
Surendra, T. [2 ]
Laxmi, Ch. N. V. [3 ]
Meera, K. M. [1 ]
Gupta, G. V. M. [1 ]
Kumar, B. S. K. [1 ,4 ]
机构：
[1] Minist Earth Sci CMLRE, Ctr Marine Living Resource & Ecol, Kochi, India
[2] GITAM, Dept Math, Visakhapatnam, India
[3] JNTU, Sch Spatial Informat Technol, Kakinada, India
[4] GITAM, Environm Studies Dept, Visakhapatnam, India
来源：
MARINE POLLUTION BULLETIN | 2024年 / 209卷
关键词：
Groundwater; Nutrient ratios; Phytoplankton pigments; Ocean acidification; Microcosm; Bay of Bengal; HARMFUL ALGAL BLOOMS; PRIMARY PRODUCTIVITY; BORNE NUTRIENTS; FRESH-WATER; INORGANIC NUTRIENTS; MARINE ECOSYSTEMS; NITROGEN-CYCLE; CHESAPEAKE BAY; ARABIAN SEA; DISCHARGE;
D O I：
10.1016/j.marpolbul.2024.117016
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Submarine groundwater discharge is a pivotal factor in modifying the structure of phytoplankton communities in coastal waters. The objective of the study was to investigate how variations in nutrient concentrations and ratios influence the composition of phytoplankton communities along the coastal waters of Bay of Bengal. The experiment involved mixing groundwater with coastal water at 5% and 10% proportions. Phytoplankton growth was more pronounced in 10 % groundwater than those with 5 % and control samples. In control samples, Chl-a and other pigments, experienced decrease from 20 % to 80 %, except in Odisha-Paradeep and VisakhapatnamAndhra Pradesh, where peridinin concentrations increased by 60% to 65% owing to low Si:N ratios below 0.2. A shift was observed from diatoms to dinoflagellates due to low Si: N ratios. The results reaffirm the hypothesis that variations in nutrient concentrations and ratios play a substantial role in shaping the composition of phytoplankton in the adjacent coastal waters.
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页数：14
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