04 Haz 2025 Çarşamba
Abundance and diversity of Odonata (Insecta) as an environmental indicator at two land use types in Kalyani Lake Park and Bortir bill (Nadia and North 24 Parganas district), West Bengal, India
Abstract : Odonata are concerned with scrupulous ecosystem’s productivity. Their diversity and richness indicate affluence in natural variety and resource cock-and-bull story. To understand the effects of changing proportions of land-use patterns on species diversity. Odonates are good bio-indicators of environmental changes. The present studies were conducted in Kalyani Lake Park and Bortir Bill, West Bengal, India from June to December 2021 and 2022 to assess the diversity of Odonata species. The present study recorded a total of 41 species of Odonata. Thirty-five species were found in Kalyani Lake Park as compared to 25 species in Bortir Bill agricultural land, with 19 species common to both the localities. This study found a total of 41 species of Odonata (Dragonflies and Damselflies) in two sub-orders Anisoptera and Zygoptera. In the suborder Anisoptera the family Libellulidae includes 28 species, whereas the families Aeshnidae 2 species in each. In the suborder Zygoptera, the family Coanagrinoidae has 9 species and the family Platycnenimidae has 2 species. Factors that affected biodiversity included water availability, vegetation cover and abundance of predatory species like water spiders during monsoon and post-monsoon period. The degradation of the wetland by human activities are a potential threat to the Odonate individuals and on biodiversity overall. It is recommended that increased awareness on the importance of using native insect species as first-level indicators of environmental health can save the nation’s significant funds over chemical interventions Relative abundance, shannon winner diversity index, margalef’s richness index, evenness index, dominance index, simpson index, descriptive statistics, students’t-test and one-way ANOVA have been used to establish the relation between species diversity and habitat. The present investigation provides baseline data for future research and conservation of odonate species in places like the model city, which face rapid urbanization.