Keralam’s mangrove cover expanded in past decade despite prior decline, finds study
Study by ICAR-Central Marine Fisheries Research Institute based in Kochi compared satellite images from 2017 and 2026 to map changes in mangrove vegetation across Keralam’s coastal districts
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Context
A recent study by the (CMFRI) reveals an increase in Kerala's mangrove cover over the past decade, despite a historical loss of nearly 90% over fifty years. Concurrently, another study presented at the same symposium highlighted a concerning rise in the frequency and intensity of marine heatwaves in the between 1982 and 2023.
UPSC Perspectives
Environmental
The recovery of mangrove ecosystems is a critical component of coastal resilience and climate change mitigation. Mangroves are halophytes (salt-tolerant plants) that thrive in intertidal zones, acting as vital blue carbon sinks (ecosystems that sequester carbon dioxide from the atmosphere). Their complex root systems stabilize coastlines, mitigating the impact of cyclones, storm surges, and coastal erosion, which is particularly relevant for vulnerable states like Kerala. Furthermore, they serve as essential breeding and nursery grounds for diverse marine life, supporting local fisheries and biodiversity. The study underscores the importance of continuous monitoring and conservation efforts to reverse historical degradation and enhance the ecological services provided by these unique ecosystems. UPSC often tests the ecological significance of mangroves and their role in disaster risk reduction.
Geographical
The increasing incidence of marine heatwaves (prolonged periods of anomalously high sea surface temperatures) in the presents a significant geographical and climatological challenge. The is already prone to intense cyclonic activity due to its specific oceanographic characteristics, including high sea surface temperatures and significant freshwater influx. Marine heatwaves exacerbate this vulnerability by providing more thermal energy, potentially leading to the rapid intensification of cyclones. Furthermore, these heatwaves cause severe thermal stress to marine ecosystems, leading to coral bleaching, disruption of marine food webs, and shifts in species distribution. The study from the highlights the need to understand the complex interactions between ocean warming, atmospheric circulation, and regional climate patterns. For UPSC, understanding the causes and consequences of marine heatwaves, particularly in the Indian Ocean region, is crucial for both Geography and Environment sections.
Governance
The use of satellite imagery and remote sensing technology, as demonstrated in the study, is a powerful tool for environmental governance and policy implementation. Satellite-based monitoring allows for cost-effective, large-scale, and continuous assessment of land-use changes, enabling authorities to track the effectiveness of conservation programs and identify areas requiring immediate intervention. This aligns with the broader push towards evidence-based policymaking and the integration of technology in environmental management. The symposium itself, involving institutions like and the , highlights the importance of collaborative scientific research in addressing complex ecological challenges. The UPSC syllabus emphasizes the role of science and technology in governance and the need for robust institutional frameworks for environmental protection.