Journal Article

The impact of long-term environmental change on zooplankton along the southwestern coast of India

Athira, T. R., Muzaffar, Sabir Bin, Shifa, C. T., Jobiraj, T., Thejass, P., Reshi, Omer R., Shamna, H., Rashiba, A. P., AlMaarofi, Sama S., Nefla, Aymen, Aarif, K. M.

2022

Overview

Environmental pollution and climate change are causing major changes in the marine environment. Coastal zones around the world are experiencing changes such as nutrient influx, resulting in altered plankton communities. The aim of this study was to determine the response of zooplankton to the changes in the environmental variables in the coastal zone of the Arabian Sea, Southwest Coast of India, over 10 years. Zooplankton abundance, chlorophyll-a concentrations, and water quality variables (rainfall, nitrates, phosphates, pH, water temperature, and salinity) were quantified from January 2010 to December 2019. Water temperature, pH, salinity, and phosphates increased steadily across the sites during the study period whereas chlorophyll-a and nitrates decreased. Rainfall abundance was not exhibiting any patterns or trends. The effects of the sampled environmental variables on zooplankton abundance were tested using generalized linear mixed models. Salinity and phosphates negatively affected the zooplankton abundance whereas water temperature, pH, and chlorophyll-a concentration had a positive effect. Coastal zones in southwest India are experiencing declining phytoplankton abundance due to a number of environmental factors. Reduced phytoplankton combined with altered environmental variables are having declining effects on zooplankton. This decline in zooplankton population has far reaching effects on biota in higher trophic levels including economically important organisms such as fishes.

• Publisher: Springer International Publishing,Springer Nature B.V
• Subject: Abundance / Animal reproduction / Animals / Arabian Sea / Atmospheric Protection/Air Quality Control/Air Pollution / Beaches / Biodiversity / Biota / Chlorophyll / Chlorophyll A / Climate change / Coastal effects / Coastal zone / Coastal zones / Coasts / Earth and Environmental Science / Ecology / Economic importance / Ecosystems / Ecotoxicology / Environment / Environmental changes / Environmental factors / Environmental Management / Environmental Monitoring / Environmental pollution / Environmental science / Fisheries / India / Marine environment / Monitoring/Environmental Analysis / Monsoons / Nitrates / Nutrients / pH effects / Phosphates / Phytoplankton / Plankton / pollution / Population decline / Productivity / Rain / Rainfall / Salinity / Salinity effects / Statistical models / Trophic levels / Water quality / Water quality variables / Water temperature / Zooplankton