Home Safety and Accident Prevention in a Child Health Conference

The Terai is a complex ecosystem including Sal forests, tall grassland and swamps maintained by periodic flooding, being one of the most diverse ecosystems of India. The knowledge on diversity and distribution of spiders in this ecosystem is sparse as compared to other Indian regions. A survey was carried out to explore spider species diversity in various habitats based on prominent vegetation and land cover map mainly of the tropical semi-evergreen forest, grasslands and riverine area. Through stratified random sampling, spiders were collected from various microhabitats within respective habitats. 20 transects of 50 m (for pitfall trapping) and 10 transects of 50 m (for sweep netting) were laid per habitat in order to obtain comprehensive representation of different spider species. All adult specimens were identified up to species level and sorted to morphospecies when species level identification was not possible. A total of 73 species belonging to 36 genera of 17 families were recorded during the entire study period from the land cover and vegetation types sampled. Species diversity of the riverine area was found to be maximum (Shannon – Pielou evenness index: 0.77, Simpson reciprocal index: 8.38) although the estimated species richness (according to Chao1, Chao2 and Jackknife 2) gave same results for both riverine and tropical semi ever-green habitats, with 31 species each. The most dominant species in the grassland and riparian habitat types were Oxyopes spp, while in the evergreen forest was Hippasa spp. The Family composition of the spider assemblage showed a higher occurrence of Oxyopidae and Lycosidae in the riparian and grassland habitats and a high occurrence of Araneidae in the tropical semi-evergreen habitat patch. The riparian site had substantially higher species diversity and more uncommon species, perhaps because a wide variety of microhabitats and a more dynamic habitat structure due to the frequent effects of flooding

Biology · Diversity index · Evergreen · Geography · Habitat · Species diversity · Species evenness · Species richness · Transect · Vegetation (pathology) · Ecology · Genetic diversity and population structure · Genomics and Phylogenetic Studies · Spider Taxonomy and Behavior Studies

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