Description:
"In the Karen area of Myanmar, where the Karen have practiced traditional shifting
cultivation since colonial times, we tried to reconstruct a land use history of their shifting
cultivation practices using a combination of field observations, global positioning system
(GPS) mapping, and interviews conducted during 2002-06, as well as analyses of JERS and
LANDSAT satellite images taken in 1989-2001. The vegetation recovery process during
the fallow period was also analyzed using a supervised classification of high-resolution
QuickBird satellite images taken in 2005. The satellite image analysis suggested that 65-75%
of the shifting cultivation fields could be extracted from JERS images taken between
November and January by using the normalized difference vegetation index (NDVI) as an
indicator. The overlap of shifting cultivation fields from 1989 to 2006 showed that the
fallow period of most shifting cultivation in this area exceeded 9-12 years. According to
the vegetation recovery analysis, most fallow land was covered with bamboo within 5 years after the harvest, and that fallow land was reopened when a few tree species started
to grow in the bamboo-dominated forests. Vegetation analysis showed that around 90% of
the shifting cultivation fields were opened by slashing and burning bamboo-dominated
forests in 2006, although more tree-dominated forests with a longer fallow period could
have been opened. These results showed that the recovery of bamboo-dominated forests is
a key factor in maintaining the practice of shifting cultivation in this area"....Keywords: long fallow, normalized difference vegetation index (NDVI), remote sensing,
supervised classification
Source/publisher:
The southeast asian studies 45(3), 343-358,
Date of Publication:
2007-12-31
Date of entry:
2015-01-25
Grouping:
- Individual Documents
Category:
Language:
Japanese (Abstract in English)