期刊名称：Universal Journal of Environmental Research and Technology
电子版ISSN：2249-0256
出版年度：2011
卷号：1
期号：3
出版社：Euresian Publications
摘要：Primary productivity and physico-chemical parameters were estimated in Ana Sagar Lake, Ajmer from September 2007 to August 2008. GPP value ranged between 1.93 and 6.24 gC/m2/day, NPP ranged between 0.72 and 4.99 gC/m2/day and Community respiration ranged from 0.26 to 3.6 gC/m2/day. Water temperature varied from 16.4°C to 31.2°C. pH and transparency ranged between 6.7 and 10.2 and 34 cm and 65 cm respectively. Variation in dissolved oxygen (DO) was from 6.7 to 10.7 mg/l. Biological oxygen demand (BOD) and alkalinity varied from 9.2 to 25.2 mg/l and 176 to 264 mg/l. Concentration of nutrients viz. chloride (18.5 to 32.4 mg/l), nitrate (12.9 to 26.4 mg/l) and phosphate (1.2 to 3.2 mg/l) also varied independently. Primary productivity and physico-chemical values of the lake were found high, mainly due to sewage discharged, industrial effluents and the agricultural runoff by surrounding city population. High values of productivity and nutrients also exposed its eutrophic condition.
