Seasonal Variation in Primary Productivity in Relation to Physico-Chemical Parameters of Lower Tiger Hills Reservoirs, Nilgiris District, Tamil Nadu, India

The present study investigated the variation in primary productivity in the Upper and Lower Tiger Hills Reservoirs located in Udhagamandalam. The relationship between primary productivity and selected physico-chemical parameters, including air temperature, water temperature, conductivity, and dissolved oxygen, was also evaluated. Water samples were collected from four stations in each reservoir at fortnightly intervals from November 2025 to April 2026. Primary productivity was estimated using the dark bottle method. The results revealed a significant relationship between primary productivity and the measured physico-chemical parameters. Both reservoirs exhibited comparatively high productivity, supporting the development and sustenance of plankton communities. The findings indicate that physico-chemical characteristics play an important role in regulating primary productivity and maintaining ecological balance in these freshwater ecosystems.

Primary productivity, Tiger Hills Reservoir dissolved oxygen, conductivity, temperature, plankton

1. American Public Health Association. (1996). Standard methods for the examination of water and wastewater (19th ed.). American Public Health Association. [Google Scholar] [Crossref]

2. Begum, A., & Harikrishna. (2008). Study on the quality of water in some streams of the Cauvery River. Journal of Chemistry, 5, 377–384. [Google Scholar] [Crossref]

3. Babar, H. T., & Raje, G. B. (2015). Primary productivity study of Morawane Dam in Ratnagiri District, Maharashtra, India. Journal of Global Biosciences, 4(2), 1430–1438. [Google Scholar] [Crossref]

4. Cairns, J., & Dickson, K. L. (1971). A simple method for the biological assessment of the effects of waste discharges on aquatic bottom-dwelling organisms. Journal of Water Pollution Control Federation, 43, 755–772. [Google Scholar] [Crossref]

5. Gupta, P. K. (2004). Soil, plant, water and fertilizer analysis. Agrobios Publications. [Google Scholar] [Crossref]

6. Gupte, A., & Shaikh, N. (2013). Seasonal variations in physico-chemical parameters and primary productivity of Shelar Lake, Bhiwandi, Thane, Maharashtra. Universal Journal of Environmental Research and Technology, 3(4), 523–530. [Google Scholar] [Crossref]

7. Karthick, S., Aanand, S., Srinivasan, A., & Jawahar, P. (2016). Assessment of seasonal variations in water quality parameters of Kadamba Tank in Thoothukudi District, Tamil Nadu, India. International Journal of Applied Research, 2(11), 329–334. [Google Scholar] [Crossref]

8. Li, T. Y., Li, S. Y., Liang, C., Bush, R. T., Xiong, L., & Jiang, Y. J. (2018). Comparative assessment of Australia's lower lakes water quality under extreme drought and post-drought conditions using multivariate statistical techniques. Journal of Cleaner Production, 190, 1–11. [Google Scholar] [Crossref]

9. Meenakshi, N. (2014). Ecosystem dynamics of Katteri Reservoir, Nilgiri District, Tamil Nadu (Doctoral dissertation, Bharathiar University). [Google Scholar] [Crossref]

10. Murugesan, V. K., Rani, P., & Manoharan, S. (2003). Ecology and fisheries of selected reservoirs in Tamil Nadu (CIFRI Bulletin No. 117). Central Inland Fisheries Research Institute. [Google Scholar] [Crossref]

11. Palanisamy, S. (2005). Reservoir ecology of Lower Anaicut, Thanjavur District, Tamil Nadu (Doctoral dissertation, Bharathidasan University). [Google Scholar] [Crossref]

12. Sheeja, B. D. (2005). Seasonal variation in the limnological characteristics of selected aquatic ecosystems of the Kaveri Delta (Doctoral dissertation, Bharathidasan University). [Google Scholar] [Crossref]

13. Sugunan, V. V. (1995). Reservoir fisheries in India (FAO Fisheries Technical Paper No. 345). Food and Agriculture Organization of the United Nations. [Google Scholar] [Crossref]

14. Tamot, P., Mishra, R., & Sandu, T. (2007). Water quality monitoring of Halali Reservoir with reference to cage aquaculture as a modern tool for enhanced fish production. In Proceedings of the 12th World Lake Conference (Taal 2007) (pp. 318–324). [Google Scholar] [Crossref]

15. Talib, A. H. (2017). Some limnological features of Al-Hammar Marsh, southern Iraq, after restoration. Iraqi Journal of Agricultural Sciences, 48(5), 309–381. [Google Scholar] [Crossref]

16. Talib, R. H., Helal, M. M., & Naij, R. K. (2022). The dynamics of the aquatic food chain system in a contaminated environment. Iraqi Journal of Science, 63(5), 2173–2193. [Google Scholar] [Crossref]

17. Verma, A. K., & Saksena, D. N. (2010). Assessment of water quality and pollution status of Kalpi (Morar) River, Gwalior, Madhya Pradesh, with special reference to conservation and management plans. Asian Journal of Experimental Biological Sciences, 2(3), 419–429. [Google Scholar] [Crossref]

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