Mar. 14, 2013 — Around half of
Cambodia's tropical flooded grasslands have been
lost in just 10 years according to new research from the . University of East Anglia
The seasonally flooded grasslands around the Tonle Sap,
Southeast Asia's largest freshwater lake, are of great
importance for biodiversity and a refuge for 11 globally-threatened bird
species. They are also a vital fishing, grazing, and traditional rice farming
resource for around 1.1 million people.
Research published today in the journal Conservation Biology quantifies for the first time the area's catastrophic loss of tropical flooded grassland.
The grassland area spanned 3349 km² in 1995, but by 2005 it had been reduced to just 1817 km² -- a loss of 46 per cent.
Despite conservation efforts in some areas, it has continued to shrink rapidly since, with a further 19 per cent lost in four years (2005-2009) from the key remaining grassland area in the southeast of the
Tonle Sap floodplain.
Factors include intensive commercial rice farming with construction of irrigation channels, which is often illegal. Some areas have also been lost to scrubland where traditional, low-intensity agricultural activity has been abandoned.
The research has been led by Dr Charlotte Packman from UEA's
, in collaboration
with the Wildlife Conservation Society Cambodia Program and BirdLife
International. It was funded by the Critical Ecosystem Partnership Fund. school of Environmental Sciences
Dr Packman said: "Tropical and flooded grasslands are among the most threatened ecosystems globally. The area around the Tonle Sap lake is the largest remaining tropical flooded grassland in
Asia. It is hugely important to both biodiversity and the
livelihoods of some of the world's poorest communities. Our research shows that
these grasslands are disappearing at an alarming rate.