Aquatic Ecosystems — Prelims Strategy
Prelims Strategy
For Prelims, the strategy for Aquatic Ecosystems should focus on factual accuracy and conceptual clarity. Prioritize understanding the classification of aquatic ecosystems (freshwater, marine, brackish) and their key distinguishing features (salinity, dominant flora/fauna, physical characteristics).
Memorize important terms like eutrophication, coral bleaching, ocean acidification, bioaccumulation, and biomagnification with their precise definitions and causes/effects. Pay close attention to Indian examples: major rivers (Ganga, Brahmaputra), lakes (Chilika, Wular), wetlands (Ramsar sites), and marine areas (Gulf of Mannar, Sundarbans).
Be thorough with the legal and policy framework: key provisions of the Water Act 1974, Environment Protection Act 1986, CRZ Notifications, and Wetlands (Conservation and Management) Rules 2017. Remember specific government initiatives like Namami Gange and Amrit Dharohar.
Focus on the ecosystem services provided by different aquatic systems (e.g., mangroves for coastal protection, wetlands for water purification). Practice MCQs that test your understanding of causes and effects of environmental problems (e.
g., what causes eutrophication, what are the impacts of marine heatwaves). Cross-reference with for biodiversity hotspots and for geographical distribution.