Geochemical distribution and forms of phosphorus in the surface sediment of Netravathi-Gurupur estuary, southwestern coast of India.

Autor: Saha A; ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India. Electronic address: ajoysahacob@gmail.com., Vijaykumar ME; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India., Das BK; ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India., Samanta S; ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India., Khan MF; Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India., Kayal T; ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India., Jana C; ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India., Chowdhury AR; ICAR- National Institute of Secondary Agriculture, Ranchi 834010, India.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2023 Feb; Vol. 187, pp. 114543. Date of Electronic Publication: 2023 Jan 12.
DOI: 10.1016/j.marpolbul.2022.114543
Abstrakt: Estuaries are the most productive transition ecosystem and phosphorus (P) plays an important role in these ecosystems. Therefore, in the present study, sequential extraction method was used to determine the abundance of five sediment P fractions (calcium (Ca-P), Iron (FeP), aluminum (AlP), exchangeable (Ex-P) and organic (OrgP) bound P) in Netravathi-Gurupur estuary, India. Total phosphorus (TP) content varied from 435-810 mg/kg (non-monsoon) and 258-699 mg/kg (monsoon). Inorganic P was dominant part. Different P fractions followed similar order (Fe-P > Ca-P > Al-P > Org-P > Ex-P) with respect to seasons. FeP was dominant fraction, indicating probable anthropogenic stress. Sediment may act as source of P as bioavailable P constituted 40-69.2 % of TP. Molar ratio of OC to Org-P in sediment indicated terrestrial sources of organic matter. However, the estimated phosphorus pollution index were lower than one except a few cases indicating less ecological risk with respect to sedimentary TP load.
Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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