At least 18 million impoverished individuals across the Indo-Pacific fish in shallow seagrass meadows, with 6.5 million relying entirely on the habitat for daily meals and income, according to a large-scale study published in the journal Nature Sustainability and co-led by researchers at Swansea University and the conservation organisation Project Seagrass.
Indo-Pacific Seagrass Fisheries Form a Hidden Safety Net for 18 Million Impoverished Coastal Residents
Flowering underwater plants form extensive coastal meadows that have long been overshadowed by charismatic ecosystems like coral reefs or tropical forests. Yet, these shallow marine habitats support essential fisheries that are easily reached on foot or using minimal gear. According to the research, this accessibility makes seagrass invaluable to households possessing few alternative means of survival. Women and marginalized groups frequently occupy central roles within these grassroots fisheries, anchoring local food security along vulnerable coastlines.
The findings demonstrate that households trapped in extreme poverty show a significantly higher likelihood of total reliance on seagrass habitats. Data gathered by the scientific team reveals that seagrass-dependent fishers earn approximately 23 percent less than other local fishers. Researchers warn that this dynamic creates a severe coastal poverty trap, locking vulnerable families into low-income livelihoods tethered to a deteriorating natural asset.
“This study changes how the world needs to see seagrass. These aren’t just meadows for fish, for turtles or carbon. They’re hidden safety nets for millions of people,”
Coastal Development and Climate Change Threaten Vulnerable Fishing Communities
Marine habitats throughout the Indo-Pacific face escalating pressure driven by land-based pollution, unmanaged coastal development, and shifting climate patterns. Consequently, when underwater meadows degrade, dependent households absorb the full brunt of the loss.
“When seagrass disappears, it’s not just nature that’s lost. Food, income and security disappear with it, often for the people least responsible for its decline and least able to adapt. Seagrass loss is a direct threat to food security, livelihoods and justice across some of the world’s most climate-vulnerable coastlines.”
Benjamin Jones
Scientists emphasize that these dependencies will only intensify as human population growth, widening economic inequality, and climate shocks place unprecedented strain on marine environments.
Integrating Marine Conservation into Global Poverty Alleviation and Sustainable Development Frameworks
Swansea University’s Dr Richard Unsworth, who serves as Chief Scientific Officer at Project Seagrass, notes that international bodies and state governments cannot credibly address rural poverty while ignoring nearshore marine habitats.
The study’s authors argue that conservation policies must merge directly with poverty reduction initiatives. Failing to recognize underwater meadows as fundamental pillars of human sustenance threatens to undermine global progress toward United Nations Sustainable Development Goals targeting hunger and poverty eradication.
“More than 20 years ago in Indonesia, coastal communities and local colleagues helped me understand something that was still largely absent from global conservation debates: that some of the world’s poorest coastal communities were relying on seagrass meadows every day for food and income. This study allows us to see its scale for the first time. Behind these figures are millions of real people for whom seagrass loss isn’t an abstract environmental problem; it can mean the loss of food, income and security. That has profound implications for how the world thinks about seagrass conservation.”
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