River Bio Monitoring


Environmental Health

As the world’s tenth largest river, the mighty 4,909 kilometre-long Mekong River is home to unique, rich and abundant natural resources including rare species such as Pangasianodon gigas, the Giant Mekong Catfish, and Orcaella brevirostris,the Irrawaddy Dolphin.

Major changes including a decline in capture fisheries, intensive irrigation for agriculture, mainstream development proposals and less predictable climate patterns are driving the Mekong’s environment into a state of uncertainty.

The Mekong River Commission’s focus on specific areas such as climate change adaptation, fisheries, wetlands and watershed management has brought about country-driven strategies that not only aim to protect the environment, but also help people adapt to environmental uncertainties in a more prepared manner.


The Mekong basin is one of the richest areas of biodiversity in the world. Recent estimates of the greater Mekong region’s bio data include approximately 20,000 plant species, 430 mammal species, 1,200 bird species, 800 reptile and amphibian species, and 850 fish species, with new species still being discovered.

Despite its abundance, the Mekong’s distinct biodiversity is threatened: large-bodied fish species, in particular, appear to be declining, including the critically endangered Giant Catfish. Many important bird habitats have suffered due to wetland drainage, overgrazing, peat mining, reservoir construction, pesticide use, and changes to agricultural practices. The Mekong Basin is home to some of the world’s most spectacular amphibians and reptiles, but unsustainable hunting and trading practices have decimated many of these populations.

The MRC is actively trying to conserve biodiversity through its indigenous species aquaculture project under the Fisheries Programme. This project encourages the use of indigenous species in aquaculture in order to prevent the spread and dominance of non-native invasive species that threaten biodiversity. Biodiversity also has the potential to be addressed under the MRC’s Basin Development Programme as part of the integrated approach to planning that considers environmental impacts, such as biodiversity loss, and solutions for reducing them.

Mekong wetlands

The wetlands of the Lower Mekong Basin provide unique and irreplaceable habitats for countless species of fish, plants and animals, and essential food and water sources for millions of people in rural communities. They also have many important ecological functions with high economic values attached, such as sediment trapping, nutrient recycling and pollution removal, surface and ground water storage and carbon capture. MRC research on wetlands under the Environment Programme and Climate Change and Adaptation Initiative will arm decision makers with knowledge on how to protect these important ecosystems from the negative impacts of development and climate change, both now and for the future.


Role of the CNMC

Through its Environment Programme, CNMC assists MRC and its Member Countries fulfil Article 3 on the protection of the environment and ecological balance and Article 7 on the prevention and cessation of harmful effects of the 1995 Mekong Agreement.