The lower northern region of Thailand is characterized by a heterogeneous structure,
dominated by tropical forests i.e. mixed deciduous and deciduous dipterocarp forests. The species
number of pollen feeding insects is directly correlated with the number species of plants (Fontaine et
al., 2006; Blüthgen and Klein, 2011). Over the past 5 decades, national parks and wildlife
sanctuaries in this area have been deforested. This is one of the most serious threats to
biodiversity. Winfree et al. (2007) proposed that these bees are sensitive to the change in
habitat, thus, deforestation may reduce both populations and species diversity. Although some
parts of this region have been deforested and converted for agricultural purposes, it is one of the
most biologically diverse areas in Thailand. The Nam Nao National Park encompasses the
border between the northern and northeastern parts of Thailand with an average elevation of 800
m. Nam Nao was established as a national park on the 4th May 1972 and was declared the 5th
national park of Thailand. Total area of the park is about 966 sq km. The area is mountainous
and its forests provide an essential watershed for the surrounding villages and farm lands (DNP,
2010). The aims of this study were to survey pollen sources and to determine species diversity
of the stingless bees found in the Nam Nao National Park. The results obtained will provide
useful knowledge on species diversity of stingless bees and their food sources. This knowledge,
therefore, will be applied for further study in biology and sustainable conservation of those bees
in Thailand and elsewhere.
The lower northern region of Thailand is characterized by a heterogeneous structure,dominated by tropical forests i.e. mixed deciduous and deciduous dipterocarp forests. The speciesnumber of pollen feeding insects is directly correlated with the number species of plants (Fontaine etal., 2006; Blüthgen and Klein, 2011). Over the past 5 decades, national parks and wildlifesanctuaries in this area have been deforested. This is one of the most serious threats tobiodiversity. Winfree et al. (2007) proposed that these bees are sensitive to the change inhabitat, thus, deforestation may reduce both populations and species diversity. Although someparts of this region have been deforested and converted for agricultural purposes, it is one of themost biologically diverse areas in Thailand. The Nam Nao National Park encompasses theborder between the northern and northeastern parts of Thailand with an average elevation of 800m. Nam Nao was established as a national park on the 4th May 1972 and was declared the 5thnational park of Thailand. Total area of the park is about 966 sq km. The area is mountainousand its forests provide an essential watershed for the surrounding villages and farm lands (DNP,2010). The aims of this study were to survey pollen sources and to determine species diversityof the stingless bees found in the Nam Nao National Park. The results obtained will provideuseful knowledge on species diversity of stingless bees and their food sources. This knowledge,ดังนั้นจึง จะใช้เพื่อการศึกษาชีววิทยาและการอนุรักษ์อย่างยั่งยืนของเหล่าผึ้งในประเทศไทยและอื่น ๆ
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