EnvironmentSource: The Hindu
Microplastics Disrupt Ecosystem Stability in Sundarbans
Tuesday, 21 April 2026
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Microplastic pollution in the Sundarbans is disrupting the ecosystem's carbon cycle and food web stability, a recent study reveals. This issue is crucial for UPSC aspirants, especially for General Studies Paper 3, which covers environmental concerns. Last Updated: 21-04-2026
Key Facts About Microplastics in Sundarbans
- Alarming Pollution Levels: Microplastic levels surged by 40% during the monsoon season in the Mooriganga estuary.
- Sources: Around 50% of plastics were fibers, primarily from textiles, with polypropylene and PET being the most common materials.
- Formation of 'Plastispheres': Weathered plastics host complex microbial communities.
- Carbon Reservoir: Plastics, being 90% carbon, act as artificial carbon sinks, altering microbial dynamics.
- Threat to 'Blue Carbon' Efficiency: Disruptions in natural carbon cycles reduce the Sundarbans' efficiency as a carbon sink.
- Definitions: Microplastics are less than 5 mm; nanoplastics are less than 1 μm.
- Classification: Primary microplastics are manufactured; secondary microplastics form from larger plastics breaking down.
Microplastics and Ecosystem Stability
Microplastic pollution poses a significant threat to the Sundarbans, a vital blue-carbon ecosystem. The disruption of carbon cycles affects India's strategic goals of climate change mitigation and biodiversity conservation. The Sundarbans' role as a natural shield against climate events is compromised, impacting both ecological balance and socio-economic stability in the region.
UPSC Relevance
- GS Paper 1: Geography - Impact of human activities on natural resources.
- GS Paper 3: Environment - Pollution and conservation efforts.
- Prelims: Questions on definitions, sources, and impacts of microplastics.
- Mains: Analytical themes on environmental degradation and policy measures.
- Essay Paper: Topics on environmental sustainability and climate change.
FAQ Section
- What is microplastic pollution? Microplastic pollution refers to the presence of tiny plastic particles in the environment, which can disrupt ecosystems and pose health risks.
- Why is microplastic pollution important? It affects the stability of ecosystems like the Sundarbans, altering carbon cycles and impacting biodiversity.
- What are the key features of microplastics? Microplastics are less than 5 mm in size, originate from various sources, and can host microbial communities that disrupt natural processes.
Detailed Coverage
- High concentrations of microplastics found in Mooriganga estuary.
- Microplastic levels surged by 40% during monsoon.
- Sources include textile fibers and packaging materials.
- Plastics form 'plastispheres' with complex bacteria communities.
- Plastics act as artificial carbon sinks.
- Leached carbon alters microbial dynamics.
- Threat to the efficiency of blue carbon ecosystems.
- Microplastics are mistaken for food by marine life.
- Plastics can block digestive tracts and alter feeding behavior.
- Plastics absorb toxic pollutants from water.
- The Sundarbans is the largest mangrove forest globally.
- Home to the Royal Bengal Tiger and diverse wildlife.
- Declared a UNESCO World Heritage Site.
- Critical for coastal protection against natural disasters.
- Recognized as a Biosphere Reserve.
- Recent study highlights alarming microplastic pollution levels.
Environment