河口
沉积物
磷
环境化学
有机质
污染
生态系统
环境科学
萃取(化学)
化学
生态学
海洋学
地质学
生物
古生物学
有机化学
色谱法
作者
Ajoy Saha,M. E. Vijaykumar,Basanta Kumar Das,Srikanta Samanta,M. Feroz Khan,Tania Kayal,Chayna Jana,Arnab Roy Chowdhury
标识
DOI:10.1016/j.marpolbul.2022.114543
摘要
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.
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