Spatial variation of phosphorus fractions in bottom sediments and the potential contributions to eutrophication in shallow lakes

被引：32

作者：

Ishii, Yuichi ^{[1
,2
]}

Harigae, Satoshi ^{[3
]}

Tanimoto, Shiho ^{[3
]}

Yabe, Tohru ^{[1
]}

Yoshida, Tomohiko ^{[4
]}

Taki, Kazuo ^{[3
]}

Komatsu, Nobuyuki ^{[2
]}

Watanabe, Keiji ^{[2
]}

Negishi, Masami ^{[2
]}

Tatsumoto, Hideki ^{[5
]}

机构：

[1] Natl Inst Environm Studies, Div Environm Biol, Tsukuba, Ibaraki, Japan

[2] Ibaraki Prefectural Kasumigaura Environm Sci Ctr, Environm Water Lab, Tsuchiura, Ibaraki, Japan

[3] Chiba Inst Technol, Dept Life & Environm Sci, Narashino, Chiba 275, Japan

[4] Tokai Univ, Grad Sch Marine Sci & Technol, Shizuoka, Japan

[5] Chiba Univ, Dept Appl Chem & Biotechnol, Chiba, Japan

来源：

LIMNOLOGY | 2010年 / 11卷 / 01期

关键词：

Phosphorus; P fractions; Sediment; P release rate; Lake eutrophication; SEQUENTIAL EXTRACTION; INORGANIC-PHOSPHATE; FORMS; RELEASE; NITRATE; WATER;

D O I：

10.1007/s10201-009-0279-3

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Spatial variation of phosphorus fractions in bottom sediment, pore water and overlying water in three shallow eutrophic lakes, Nishiura, Kitaura and Sotonasakaura, Japan, and the contributions of the fractional P to mobilization of phosphorus from sediment were examined in this study. The vertical distributions of dissolved inorganic phosphorus (DIP) concentrations in overlying and pore water differed with lake and sampling site. In particular, DIP was high in pore water in the surface layer of the sediment for the middle to downlake areas of Lake Kitaura. DIP release flux calculated from a gradient of the concentrations at the sediment-water interface was high compared with other sites. The distribution of fractional P content in sediments was highly variable. The citrate-dithionite-bicarbonate-non-reactive phosphorus (CDB-NRP) fraction, in particular, differed greatly among the three lakes. According to correlation in the ratios between CDB-NRP and loss on ignition, sediments of these lakes were classified in three clusters. The CDB-NRP fraction was suggested to play a role in DIP release from sediment. The possibility of nitrate concentration playing a role in the control of DIP release was considered.

引用

页码：5 / 16

页数：12

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