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Mishra, Abha
- Anthropogenic Drivers Shift Diatom Dominance–Diversity Relationships and Transparent Exopolymeric Particles Production in River Ganga:Implication for Natural Cleaning of River Water
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Authors
Affiliations
1 Department of Botany, Mahatma Gandhi Kashi Vidyapith, Varanasi 221 002, IN
2 Environmental Science Division, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221 005, IN
3 Department of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, IN
1 Department of Botany, Mahatma Gandhi Kashi Vidyapith, Varanasi 221 002, IN
2 Environmental Science Division, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi 221 005, IN
3 Department of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi 221 005, IN
Source
Current Science, Vol 113, No 05 (2017), Pagination: 959-964Abstract
We studied the relationships among diatom biodiversity,transparent exopolymeric particles (TEP) and water quality at the confluences of four tributaries of River Ganga (Yamuna, Assi, Varuna and Gomti)during low flow. Diatom abundance changed with concurrent shifts in water chemistry with dominance–diversity curves markedly skewed from a log-normal pattern. Canonical correspondence analysis segregated chloride-loving and calcifilous species from N- and P-favoured taxa. Despite pollution-induced reduction of diatom diversity, TEP production continued to rise plausibly due to dominance transference of TEP producers. However, with further increase in nutrient pollution, TEP declined. Since TEP enhances sedimentation removal of carbon, nutrients and heavy metals, the present study confirms one of the fundamental mechanisms that underline the self-purification capacity of River Ganga and has relevance from a biodiversity/river conservation perspective.Keywords
Anthropogenic Drivers, Carbon Sequestration, Diatoms, Transparent Exopolymeric Particles.Full Text
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