Knowledge mining for the differentiation pattern with respect to the productivity and trophic status of some selected lakes of Western Himalayas

Abstract

The present study deals with an account of the primary productivity and trophic status of Rewalsar, Kuntbhyog, and Prashar lakes of Western Himalayas. Seasonal variations in gross primary productivity (GPP) (g C m–2 day–1), net primary productivity (NPP, respiration (R), and the NPP/R ratio have been studied and compared with hydrobiological factors. Among various factors, temperature, light, nutrients, and chlorophyll a were accountable for high productivity. Nygaard’s trophic state indices were calculated. GPP showed a positive relationship with water temperature, penetration of light, nitrate, and with phosphate. The extensive range of the compound index observed in Rewalsar (12.00–20.00) and Kuntbhyog lakes (12.50–18.00) confirmed their eutrophic nature. Based on the trophic classification of waters and on the basis of productivity, Nygaard’s trophic state indices, and richness of nutrients, Rewalsar and Kuntbhyog lakes could be categorized as eutrophic, whereas Prashar Lake, as oligo-eutrophic. Based on the presence, absence, frequency of appearance, and abundance of different organisms recorded during the present investigation, bioindicators of trophic status have been determined.

Mapping water quality parameters in Baner and Gaj rivulets: Insights into the potential impact on river Beas in Himachal Pradesh using ArcGIS

“…The results of WQI evidently indicated that both rivulets are appropriate to sustain the diverse aquatic ecological diversity on the basis of the standards of WQI (Table 3). Similar observation was reported by Muhammad and Ullah (2022) in Gomal Zam Dam and its tributaries and Kumar et al (2023) for different lakes of Himachal Pradesh. The aim of water policy in India is to effectively manage and utilize water resources to ensure sustainable development, equitable distribution, and improved water security for all citizens (Kamboj et al, 2022a, 2022b).…”

Status Trofik Perairan Danau Laguna, Kota Ternate Selatan, Maluku Utara

“…Tinggi rendahnya konsentrasi N dan P sangat tergantung pada aktivitas di sekitar perairan danau sebagai sumber masukan diantaranya adalah aktivitas pertanian, limbah organik dan limbah lainnya yang mengandung N dan P, kalium oksida (K2O) serta sirkulasi dan pertukaran massa air dari dasar perairan danau laguna ke permukaaan yang membawa berbagai muatan di dasar perairan yang bersifat toksik, sebagai ancaman terhadap biota yang di budidayakan, kejadian tersebut terjadi pada saat tahun 2015 silam yang mengakibatkan biota yang di budidayakan mengalami kematian massal. Produktivitas dan status trofik juga di pengaruhi oleh siklus hidrobiologi dan parameter lingkungan seperti suhu, cahaya, nutrient dan klorofil a yang berkorelasi positif terhadap status trofik (Kumar, Jindal et al 2023;Torres-Bejarano, García-Gallego et al 2023;Tometin, Chouti et al 2023).…”

A review on plankton as a bioindicator: A promising tool for monitoring water quality

“…The pollution‐indicating bioindicators can indicate the effect of pollution before it actually starts (Thakur et al, 2013). Populations of plankton are beneficial for knowing the condition of water in an aquatic ecosystem (Kumar et al, 2023). Bioindicators act as early signals of pollution and can be used to assess the health status of a particular body of water.…”