Aquatic macroinvertebrate diversity and water quality assessment in Vembannur Wetland, Tamil Nadu, India

Wetlands are vital components of the ecosystem, offering both ecological and economic benefits. This study was conducted in the Vambannur wetland, located in Rajakkamangalam block, Kanyakumari, Tamil Nadu, to assess the diversity of aquatic macroinvertebrates and water quality across three sites in September 2024. A total of 237 individuals, 15 genera, 11 families and 8 orders were identified, with Gastropods being the most dominant order. Key biodiversity indices, including Shannon, Simpson, Menhinick, Margalef and Berger-Parker, were calculated, revealing diversity in sites 2 and 3 compared to site 1. The results highlight the significance of macroinvertebrate diversity in determining wetland quality. Principal Component Analysis (PCA) is used to explore the relationship between physicochemical parameters and macroinvertebrate communities, providing insights into wetland health.