Earth Science Frontiers ›› 2008, Vol. 15 ›› Issue (5): 212-218.

• Article • Previous Articles     Next Articles

Bioavailable phosphorus in sediments in the rivers to the west of the   Taihu lake  and their trophic level, East China

  

  1. 1Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Nanjing 210024, China
    2College of Environmental Science and Engineering, Hohai University, Nanjing 210024, China

  • Online:2008-05-02 Published:2008-05-02

PDF (PC)

714

Abstract:

The fractions and distribution of bioavailable phosphorus in river sediments were studied in order to identify the trophic level of inflow rivers to the west of Taihu LakeThe nutritive elements in sediments show higher contents in the northern rivers and lower in the southern riversThe contents of bioavailable phosphorus decrease in following order: algal available phosphorus (AAP)>OlsenP(OLP)>water soluble phosphorus(WSP)>readily desorbed phosphorus(RDP)The trophic level increases with the proportion of AAP to total phosphorusThe correlations between AAP and nutritional components show different characteristics for sediments from different regionsAAP is well associated with TN and TP in the northern rivers and with TOM in the middle and southern riversThe bioavailable phosphorus is evidently influenced by pollution sources, and its high content is corresponding to the severe algal bloomIn comparison with river sediments, the lake sediments have higher values of BAP/TP and AAP/TP, which suggests that phosphorus in lake sediments is readily absorbed by hydrophyte

Key words:

Key words: bioavailable phosphorus; sediment; river; the west of Taihu Lake

CLC Number: