DOI: 10.1007/s10533-014-9972-3
Scopus记录号: 2-s2.0-84900813188
论文题名: Turnover of DNA-P and phospholipid-P in lake sediments
作者: Paraskova J.V. ; Sjöberg P.J.R. ; Rydin E.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 119, 期: 2018-01-03 起始页码: 361
结束页码: 370
语种: 英语
英文关键词: Ånnsjön
; DNA
; Erken
; Phospholipids
; Phosphorus turnover
; Sediment
Scopus关键词: DNA
; eutrophication
; lacustrine deposit
; mobilization
; phospholipid
; phosphorus
; primary production
; sediment chemistry
; sediment core
; trophic status
; Lake Erken
; Stockholm [Sweden]
; Sweden
英文摘要: Identifying and quantifying the forms of phosphorus (P) in lake sediments is a prerequisite for understanding lake trophic status and possible exports of P downstream. Organic P is one of the most important P forms found in the sediment, where orthophosphate diesters, including DNA and phospholipids, represent a degradable P pool that can support primary production and eutrophication. In this study, sediment cores from the eutrophic Lake Erken and the oligotrophic Lake Ånnsjön, both in steady state regarding long-term P input revealed trends in the degradation of DNA-P and PL-P with sediment depth. Comparisons were performed based on the differentiation of essentially permanent or recalcitrant P and temporary, potentially mobile P for the respective fractions. The temporary P pool was defined as the part of the total P pool calculated for values higher than the level at which the measured P concentration converged to a constant value and the recalcitrant pool was defined as the difference between the total and the temporary. The temporary diester-P pool comprised over 20 % of the total temporary P in Lake Erken and around 4 % in Lake Ånnsjön. The decrease in P concentrations with depth was more rapid for DNA-P compared to PL-P in both lakes, suggesting that DNA-P has a more prominent role in internal loading. The study shows that P mobilization potential can be different for different P fractions, which is important when assessing their contribution to internal loading of P within an aquatic system. © 2014 Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83626
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Chemistry - BMC, Uppsala University, P.O. Box 599, Husargatan 3, 751 24 Uppsala, Sweden; Erkenlaboratoriet, Department of Ecology and Genetics, EBC, Uppsala University, Norr Malma 4200, Norrtälje, 761 73 Uppsala, Sweden
Recommended Citation:
Paraskova J.V.,Sjöberg P.J.R.,Rydin E.. Turnover of DNA-P and phospholipid-P in lake sediments[J]. Biogeochemistry,2014-01-01,119(2018-01-03)