Species Diversity and Abundance of Land Snails in Namtok Huai Lao Forest Park at Phu Luang District, Loei Province
Keywords:
land snail , species diversity , abundance, Namtok Huai Lao Forest ParkAbstract
Background and Objectives : Land snails are invertebrate animals, that are crucial to terrestrial ecosystems and to demonstrate the major role of land snails in the ecosystem. They prefer high-moisture habitats. In this research, the objective is to study the diversity and abundance of land snails in the mixed-deciduous and bamboo forest areas at Namtok Huai Lao Forest Park, Phu Luang District, Loei Province.
Methodology : The entire residential area within the mixed-deciduous and bamboo forest was selected for sampling, 20 x 20 meters sampling plots were used in four station (HLA, HLB, HLC, and HLD) with three plots per station and a total of 12 plots overall. The survey was conducted from December 2021 to February 2022. Four collectors were employed, and each sampling was used for 30 minutes.
Main Results : Totally of 1,652 land snails were found, representing 21 genera and 25 species. Sarika siamensis had the highest abundance. Shannon-Weiner’s index of diversity is 2.234. The maximum value of H is 3.219. The evenness index is 0.694. The exponential of Shannon entropy index, which indicates the adaptability of land snail species to the environment, is 9.336. The highest similarity coefficient was observed between sampling plots HLB01 and HLD02, with a value of 0.909, while plots HLA01 and HLA02 showed a similarity coefficient of 0.833.
Conclusions : The diversity index of land snails in the mixed-deciduous and bamboo forest areas of the Namtok Huai Lao Forest Park, is 2.234, which falls within the high range compared to the maximum value of H of 3.219. Each land snail species demonstrates a relatively even distribution in abundance, falling within the high range. Nine species of land snails exhibit effective adaptation to the environment. Sarika siamensis has achieved the highest success in thriving within this area.
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