DOI: 10.1007/s10533-015-0156-6
Scopus记录号: 2-s2.0-84951568165
论文题名: Stoichiometric impact of calcium carbonate deposition on nitrogen and phosphorus supplies in three montane streams
作者: Corman J.R. ; Moody E.K. ; Elser J.J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 126, 期: 3 起始页码: 285
结束页码: 300
语种: 英语
英文关键词: Calcium carbonate
; Nutrient cycling
; Redundancy analysis
; Stoichiometry
; Streams
Scopus关键词: calcium carbonate
; montane forest
; nitrogen
; nutrient cycling
; phosphorus
; stoichiometry
; streamwater
; travertine
; water chemistry
; water quality
英文摘要: The absolute concentrations of nitrogen (N) and phosphorus (P) and their relative availabilities (N:P stoichiometry) can influence numerous ecological processes. In streams, N:P stoichiometry is influenced by different hydrologic and biogeochemical processes that also affect the downstream transport of these nutrients to receiving waters. Calcium carbonate (CaCO3) deposition, a widespread geochemical process in alkaline streams and other aquatic ecosystems, can lower phosphate concentrations and, potentially, decrease P availability relative to N availability. We evaluated the effects of CaCO3 deposition on stream water stoichiometry using a 3-year dataset of stream physicochemistry and several metrics of CaCO3 deposition across three streams in the Huachuca Mountains of southern Arizona, USA. CaCO3 deposition rates varied across and within streams, with benthic coverage of travertine as high as 70 % and deposition rates up to 8.3 μg Ca2+ L−1 m−1. Redundancy analysis revealed a strong, negative correlation between stream water phosphate concentrations and CaCO3 deposition rates, a relationship that also extended to total P concentrations, and a strong, positive correlation between inorganic N concentrations and CaCO3 deposition rates. Furthermore, we found a significant positive relationship between CaCO3 deposition rates and N:P ratios. These results support the role of coprecipitation of phosphate with CaCO3 deposition in reducing P supply. They also suggest that reduced concentrations of P in the water column may reduce biological N uptake, amplifying the stoichiometric signal of CaCO3 deposition. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83446
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: School of Life Sciences, Arizona State University, Tempe, AZ, United States; Center for Limnology, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Corman J.R.,Moody E.K.,Elser J.J.. Stoichiometric impact of calcium carbonate deposition on nitrogen and phosphorus supplies in three montane streams[J]. Biogeochemistry,2015-01-01,126(3)