文献类型：期刊文献

英文题名：Nutrient retention in plant biomass and sediments from the salt marsh in Hangzhou Bay estuary, China

作者：Shao, Xuexin[1,2] Wu, Ming[2] Gu, Binhe[3] Chen, Yinxu[1] Liang, Xinqiang[1]

第一作者：Shao, Xuexin;邵学新

通信作者：Liang, XQ[1]

机构：[1]Zhejiang Univ, Inst Environm Sci & Technol, Hangzhou 310058, Zhejiang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[3]Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA

年份：2013

卷号：20

期号：9

起止页码：6382-6391

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;Scopus(收录号：2-s2.0-84880826060);WOS:【SCI-EXPANDED(收录号:WOS:000322155400048)】；

基金：This research was supported by the National Natural Science Foundation of China (21077088; 31000296) and the National Major Science and Technology Programs for Water Pollution Control and Treatment (2012ZX07506-006). We thank Stacey Ollis for language editing.

语种：英文

外文关键词：Estuaries; Eutrophication; Salt marshes; Primary production; Nutrients; Retention

摘要：Nutrient load into the ocean can be retained during the process of plant uptake and sedimentation in marshes along the bay zone. Seasonal variations of biomass and nutrient concentration in three dominated plant assemblages and associated sediments were monitored in this study area to determine effects of salt marsh on nutrient retention. Results showed that plant aboveground biomass displayed a unimodal curve with nutrient concentration generally decreased from spring to winter. Belowground biomass was relatively low during the rapid growth period with nutrient concentration tending to decrease and then increase during this period. Plant total nitrogen (TN) pools are higher than total phosphorus (TP) pools, and both pools showed significant seasonal variations. Water purification coefficients (WPC) of nutrients by plant assimilation were 34.4/17.3, 19.3/24.0, and 5.14/6.04 t/(m(2) year) (TN/TP) for Phragmites australis, Spartina alterniflora, and Scirpus mariqueter, respectively. Overall, these results suggest that higher annual plant biomass and nutrient assimilation contribute to greater nutrient retention capacity and accumulation in sediments, thereby enabling reduced eutrophication in transitional waters.