Mekong Delta Wetland Loss Threatens Biodiversity
Recent Developments
012022: IUCN reported that wetland loss in the Lower Mekong is affecting biodiversity, fisheries, water security, infrastructure, and livelihoods across five countries.
022023: A review in the scientific literature linked Mekong Delta deterioration to hydropower dams, drought, salinization, sea-level rise, and related downstream water shortages.
032020: Research on the Mekong Delta documented mangrove decline from 185,800 hectares in 1973 to 102,160 hectares in 2020.
04Recent studies continued to attribute paddy-field losses in the Vietnamese Mekong Delta to salinity intrusion, drought, and other indirect drivers from 2000 to 2022.
Interventions
- IUCN-led Lower Mekong wetland conservation and policy work focused on reducing wetland loss and improving ecosystem resilience.
- Nature-based and integrated delta-management approaches promoted in the conservation literature, including restoring wetland functions and improving floodplain connectivity.
- Research and monitoring efforts tracking erosion, subsidence, salinity intrusion, and sediment loss to support adaptation planning.
What Works
- Protecting and restoring wetland floodplain connectivity can help sustain fisheries, biodiversity, and flood buffering, according to conservation assessments of the Mekong Delta.
- Reducing sand mining and limiting groundwater extraction address two identified drivers of erosion and subsidence in the delta.
- Managing upstream sediment flows and hydrology is important because sediment starvation is identified as a major cause of shoreline retreat and land loss.
How to Help
- Donate to organizations working on Mekong Delta wetland conservation, such as IUCN and local conservation partners.
- Support NGOs and community groups involved in mangrove restoration, fisheries protection, and climate adaptation in Vietnam and the Lower Mekong.
- Advocate for stronger groundwater regulation, sand-mining controls, and transboundary river management in the Mekong basin.
Make an Impact
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Verified Organizations
Organizations Helping(20)
In the Colombian Amazon, Conservation International implements climate adaptation programs for Indigenous communities, including early warning systems for droughts and floods, restoration of degraded areas to enhance water regulation, and capacity building for sustainable water management to address the transition from drought to flooding and hypertropical risks.
WCS works in the Greater Mekong to maintain remaining forests and wetlands, reduce forest loss in key biodiversity landscapes, and work with governments and civil society to strengthen protected areas and address large-scale development threats. For Mekong Delta wetland loss, this is relevant because their work supports habitat protection, ecosystem integrity, and landscape-scale conservation that can reduce pressure on wetlands and associated biodiversity.
Investigates and publicizes mangrove forest loss in the Mekong Delta caused by upstream dams, sand mining, erosion (2.3 sq km coastline/year), and sea level rise; raises awareness on human-induced threats to advocate for policy changes and sustainable practices to halt wetland degradation.
WWF tackles Mekong Delta wetland loss through integrated conservation and sustainable development programmes: they map and monitor wetlands and freshwater biodiversity, promote sustainable fisheries and aquaculture practices, pilot habitat restoration and mangrove reforestation to reduce coastal erosion and saltwater intrusion, and engage policy advocacy on hydropower planning and sediment management. WWF combines field projects with community-based livelihood alternatives (e.g., sustainable aquaculture, agroforestry), capacity building for local resource management, and regional policy work to influence transboundary river governance and dam planning that affect sediment flows to the Delta.
