Chorao Island ecosystem at risk from pollution, unregulated tourism: Study

New Delhi, India Jul 11, 2026 ALN: Chorao Island, located in the Mandovi River estuary in Goa, India, is facing a critical environmental crisis due to various anthropogenic factors. The island's delicate ecosystem, which is home to diverse flora and fauna, is increasingly threatened by industrial pollution, agricultural runoff, plastic waste, encroachments, and unregulated tourism. Researchers have raised alarms about the potential long-term consequences of these threats, highlighting the urgent need for enhanced conservation efforts to protect the island's unique environment.

A recent study published in the Seagull Journal has shed light on the current state of Chorao Island’s ecosystem and the impact of ecotourism on its environment. The paper, titled ‘From Protection to Prosperity – Evidence of Ecotourism in Chorao Island’s Marine Protected Area,’ was authored by Ananya Agarwal and Bhoomik Munjal from the Amity School of Economics at Amity University Uttar Pradesh. The researchers conducted a comparative analysis of Chorao Island with globally recognized protected marine areas, such as Australia’s Great Barrier Reef, the Galápagos Marine Reserve, and Apo Island in the Philippines, to contextualize their findings.

The study paints a concerning picture of Chorao’s ecological health, revealing that toxic pollutants, including mercury and lead, are entering the Mandovi River from upstream industrial activities. These hazardous substances accumulate in aquatic life, posing severe risks not only to wildlife but also to local fishing communities that rely on these resources for their livelihoods. The implications of this pollution extend beyond immediate health concerns; they threaten the very fabric of the local economy and food security.

In addition to industrial pollution, agricultural runoff laden with pesticides and fertilizers has exacerbated the situation. This runoff contributes to harmful algal blooms that deplete oxygen levels in the water, leading to fish kills and further destabilizing the aquatic ecosystem. Moreover, plastic waste, a pervasive issue in many coastal areas, finds its way into the mangrove forests, where it becomes entangled in the roots of mangrove trees. This not only disrupts the natural growth of these vital plants but also destroys critical nursery habitats for juvenile fish, leading to long-term declines in fish populations.

The loss of mangrove cover is particularly alarming. The study indicates that Chorao Island has lost approximately 12% of its mangrove area between 1990 and 2005 due to human encroachment, illegal construction activities, and shrimp farming operations. Mangroves play an essential role in coastal protection, carbon storage, and providing habitat for numerous species. Their destruction poses a significant threat to the island’s biodiversity and its resilience to climate change impacts.

Furthermore, the researchers highlight the detrimental effects of overexploitation of mangrove resources. Practices such as cutting mangrove wood for fuel, destructive mud crab collection, and the use of tight-mesh fishing nets have weakened the ecosystem. These activities not only damage the roots of mangrove trees but also reduce the populations of young fish, further compromising the health of the aquatic environment.

Climate change adds another layer of complexity to the challenges faced by Chorao Island. Rising sea levels and reduced sediment flow are contributing to coastal erosion, threatening critical nesting areas for various bird species, including the collared kingfisher. Projections suggest that climate change could submerge up to 30% of Chorao’s mangrove forests by the end of this century, further endangering the island's biodiversity and ecological integrity.

The study also addresses the impact of tourism on the island’s ecosystem. Motorized boat tours, while popular among visitors, generate noise pollution that can disturb nesting birds, potentially leading to abandonment of nests by certain species. Additionally, the physical presence of tourists in sensitive mangrove areas can result in trampling of plants and littering, both of which have detrimental effects on the fragile ecosystem. The introduction of invasive species, such as the water hyacinth, further complicates the ecological landscape by altering wetland ecosystems and adding to environmental stress.

Despite these significant challenges, the researchers see potential for sustainable ecotourism on Chorao Island. The island’s mangrove forests serve as natural barriers against coastal erosion, store substantial amounts of carbon, and provide habitats for over 120 bird species, particularly within the Dr. Salim Ali Bird Sanctuary. The study emphasizes that well-organized ecotourism can create a balance between environmental protection and economic growth, provided that it is managed responsibly.

To harness the opportunities presented by ecotourism, the researchers recommend several strategies. These include implementing entry fees, organizing guided tours, and collaborating with responsible tourism operators to generate funds for mangrove replanting, scientific research, and conservation projects. Such initiatives could not only support ecological restoration efforts but also create local employment opportunities in eco-guiding, homestays, and traditional crafts.

Additionally, the study advocates for limiting visitor numbers during sensitive periods of the year to minimize disturbance to wildlife. Building stronger community-led tourism initiatives is essential, as it encourages local involvement and ensures that the benefits of tourism are equitably distributed. Reinventing tourism profits back into conservation and village development can enhance local livelihoods while fostering a sense of stewardship among residents.

Training eco-guides and incorporating traditional local knowledge into management plans are also crucial steps toward sustainable tourism development. Such measures not only empower local communities but also promote a deeper understanding of the ecological and cultural significance of Chorao Island among visitors.

In conclusion, the findings from the study underscore the urgent need for coordinated conservation efforts to protect Chorao Island’s fragile ecosystem. While the challenges posed by pollution, unregulated tourism, and climate change are significant, the potential for sustainable ecotourism offers a pathway toward ecological resilience and economic viability. The future of Chorao Island hinges on the collective actions of stakeholders, including government authorities, local communities, and conservation organizations, to safeguard its unique environmental heritage for generations to come.