Author:
Raghavendra K. N.,Arvind Kumar,Anushree G. K.,Grace Tony
Abstract
Abstract
Background
Butterflies are considered as bio-indicators of a healthy and diversified ecosystem. Endosulfan was sprayed indiscriminately in large plantations of Kasaragod district, Kerala which had caused serious threats to the ecosystem. In this study, we surveyed the butterflies for their abundance and diversity in three differentially endosulfan-affected areas viz., Enmakaje—highly affected area, Periye—moderately affected area, Padanakkad—unaffected area, carried out between the end of the monsoon season and the start of the winter season, lasting approximately 100 days. Seven variables viz., butterfly abundance (N), species richness (S), Simpson’s reciprocal index (D), the Shannon–Wiener index (H′), the exponential of the Shannon–Wiener index (expH′), Pielou’s evenness (J) and species evenness (D/S), related to species diversity were estimated, followed by the one-way ANOVA (F = 25.01, p < 0.001) and the Kruskal-Wallis test (H = 22.59, p < 0.001).
Results
A population of three different butterfly assemblages comprised of 2300 butterflies which represented 61 species were encountered. Our results showed that Enmakaje displayed significantly lower butterfly diversity and abundance, compared to the other two communities.
Conclusion
So far, this is the first study concerning the effect of endosulfan on the biodiversity of butterfly in the affected areas of Kasaragod, Kerala, India. This study may present an indirect assessment of the persisting effects of endosulfan in the affected areas, suggesting its long-term effects on the ecosystem.
Funder
Kerala State Council for Science, Technology and Environment (KSCSTE) Student Research Grant
Publisher
Springer Science and Business Media LLC
Reference33 articles.
1. Bhakare M. And Ogale H. 2018. A Guide to Butterflies of Western ghats (India) Includes Butterflies of Kerala, Tamiilnadu, Karnataka, Goa, Maharashtra and Gujarat state. X + 496.
2. Bouyer, J., Sana, Y., Samandoulgou, Y., Cesar, J., Guerrini, L., Kabore-Zoungrana, C., & Dulieu, D. (2007). Identification of ecological indicators for monitoring ecosystem health in the trans-boundary W Regional park: a pilot study. Biological Conservation, 138(1-2), 73–88.
3. Chao, A., Gotelli, N. J., Hsieh, T. C., Sander, E. L., Ma, K. H., Colwell, R. K., & Ellison, A. M. (2014). Rarefaction and extrapolation with Hill numbers: a framework for sampling and estimation in species diversity studies. Ecological Monographs, 84(1), 45–67.
4. Crist Thomas, O., & Veech, J. A. (2006). Additive partitioning of rarefaction curves and species–area relationships: unifying α-, β-and γ-diversity with sample size and habitat area. Ecology Letters, 9(8), 923–932.
5. Forrest, J. R. (2016). Complex responses of insect phenology to climate change. Current Opinion in Insect Science., 17, 49–54.