Microbial processes at the land–water interface, and cross‐domain causal relationships, as influenced by atmospheric deposition of pollutants in three freshwater lakes in India

摘要: The effects of long-term atmospheric deposition pollutant elements on the trans-surface causative relationships at three lake sites having different catchment characteristics were investigated in this study. selected determinants included productivity, bottom sediment quality, and a suite microbial variables (microbial biomass (Cmic); basal respiration; substrate-induced bacterial:fungal ratio; metabolic quotient; alkaline phosphatase FDAase activities) measured land–water interface, relation to phosphate; nitrate; ammonium; sulphate; calcium; magnesium. results indicated significant between-site differences (P < 0.001) phosphate (0.21–1.96 kg.h−1.year−1); nitrate (2.77–28.05 kg.h−1.year−1); ammonium (0.58–11.60 kg.h−1.year−1); sulphate (5.64–32.15 kg.h−1.year−1); calcium (4.50–30.00 kg.h−1.year−1); magnesium (1.50–12.15 kg.h−1.year−1), as well consistently increasing input these ions across time. vegetation had important that, turn, affected productivity. Interfaces woodland found be rich phenolics, supporting low Cmic activities. Except for phosphatase, which declined over time, increased activities interface. time lag correlation analysis productivity significantly altered by atmospherically driven nitrogen phosphorus inputs, with 2–3 years. Despite being supportive, aerial nutrient inputs appeared have destabilizing effect both, variables. These observations indicate that if present trends continue, it will modify cross-domain inland lentic systems long term. study are relevant formulation strategies managing freshwater tropical lakes.