Anthropogenic Impact on Tropical Perennial River in South India: Snapshot of Carbon Dynamics and Bacterial Community Composition

摘要: Riverine systems play an important role in the global carbon cycle, and they are considered hotspots for bacterial activities such as organic matter decomposition. However, our knowledge about these processes tropical or subtropical regions is limited. The aim of this study was to investigate anthropogenically induced changes water quality, distribution selected pharmaceuticals, effects pollution on greenhouse gas concentrations community composition along 800 km long Cauvery river, main river serving a potable irrigation supply Southern India. We found that situ measured pCO2 pCH4 were supersaturated relative atmosphere ranged from 7.9 168.7 μmol L−1, 0.01 2.76 respectively. Pharmaceuticals like triclosan, carbamazepine, ibuprofen, naproxen, propylparaben, diclofenac exceeded warning limits Cauvery. Proteobacteria major phylum all samples, ranging between 26.1% 82.2% abundance, it coincided with accumulation nutrients flowing water. Results emphasized impact industrialization increased population density riverine fluxes, structure.