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DOI | 10.4319/lo.2014.59.4.1203 |
Salt marsh tidal exchange increases residence time of silica in estuaries | |
Carey, J. C.1; Fulweiler, R. W.1,2 | |
发表日期 | 2014-07-01 |
ISSN | 0024-3590 |
卷号 | 59期号:4页码:1203-1212 |
英文摘要 | We present flux measurements of dissolved silicon (DSi), biogenic Si (BSi), and dissolved inorganic nitrogen (DIN) and phosphorus (DIP) on a temperate salt marsh in Narragansett Bay, Rhode Island, over neap, mid, and spring tide cycles during the spring and the summer seasons to determine the stoichiometry of marsh tidal export and the potential effect on Si availability in the receiving estuary. During the spring, when incoming waters were depleted in DSi (average 1.7 mu mol L-1), the marsh was a net sink of BSi (132 mol h(-1)) and a source of DSi (31 mol h(-1)) to the estuary. During this period, the DIN : DSi ratio of ebbing water was more than five times lower than that of flood water. Together, these data indicate that marsh nutrient fluxes "outwell'' nutrients in ratios that support spring diatom growth in Narragansett Bay. However, during the entire sampling period the marsh served as a net sink for both DSi and BSi, importing, on average, 14 mol DSi h(-1) and 86 mol BSi h(-1). We hypothesize that the net import and retention of Si by salt marshes provides a previously overlooked ecosystem service of increasing the residence time of Si in estuarine systems. In the absence of salt marshes, we calculate that 5.1 x 10(4) kmol of Si would be exported from the estuary during the growing season, decreasing the availability of Si in the system and having direct repercussions for phytoplankton species composition in nearby estuarine waters. |
语种 | 英语 |
WOS记录号 | WOS:000339942400009 |
来源期刊 | LIMNOLOGY AND OCEANOGRAPHY
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/57781 |
作者单位 | 1.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA; 2.Boston Univ, Dept Biol, Boston, MA 02215 USA |
推荐引用方式 GB/T 7714 | Carey, J. C.,Fulweiler, R. W.. Salt marsh tidal exchange increases residence time of silica in estuaries[J]. 美国环保署,2014,59(4):1203-1212. |
APA | Carey, J. C.,&Fulweiler, R. W..(2014).Salt marsh tidal exchange increases residence time of silica in estuaries.LIMNOLOGY AND OCEANOGRAPHY,59(4),1203-1212. |
MLA | Carey, J. C.,et al."Salt marsh tidal exchange increases residence time of silica in estuaries".LIMNOLOGY AND OCEANOGRAPHY 59.4(2014):1203-1212. |
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