Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 99, Issue 1, Pages 75-82Publisher
SPRINGER
DOI: 10.1007/s00128-017-2108-4
Keywords
Alkaline phosphatase; Atmospheric deposition; FDAase; Ganga River; Heterotrophy; Nutrient pollution
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Funding
- Banaras Hindu University-University Grants Commission, New Delhi
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Carbon, nitrogen and phosphorus inputs through atmospheric deposition, surface runoff and point sources were measured in the Ganga River along a gradient of increasing human pressure. Productivity variables (chlorophyll a, gross primary productivity, biogenic silica and autotrophic index) and heterotrophy (respiration, substrate induced respiration, biological oxygen demand and fluorescein diacetate hydrolysis) showed positive relationships with these inputs. Alkaline phosphatase (AP), however, showed an opposite trend. Because AP is negatively influenced by available P, and eutrophy generates a feedback on P fertilization, the study implies that the alkaline phosphatase can be used as a high quality criterion for assessing river health.
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