Seawall construction alters soil carbon and nitrogen dynamics and soil microbial biomass in an invasive Spartina alterniflora salt marsh in eastern China

被引：40
作者：
Yang, Wen [1 ,2 ]
Qiao, Yajun [1 ,2 ]
Li, Ning [1 ,2 ]
Zhao, Hui [3 ]
Yang, Rong [4 ]
Leng, Xin [1 ,2 ]
Cheng, Xiaoli [5 ]
An, Shuqing [1 ,2 ,3 ]
机构：
[1] Nanjing Univ, Sch Life Sci, 163 Xianlin Rd, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Univ, Inst Wetland Ecol, 163 Xianlin Rd, Nanjing 210023, Jiangsu, Peoples R China
[3] Nanjing Univ, Ecol Res Inst Changshu NJUecoRICH, Changshu 215500, Jiangsu, Peoples R China
[4] HuBei Three Gorges Polytech, Yichang 443000, Hubei, Peoples R China
[5] Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China
来源：
APPLIED SOIL ECOLOGY | 2017年 / 110卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Coastal embankment; Phospholipid fatty acids; Reclamation; Soil microbial community structure; Soil organic carbon and nitrogen; Wetlands; COMMUNITY COMPOSITION; ORGANIC-MATTER; TEMPERATURE SENSITIVITY; JIANGSU PROVINCE; COASTAL WETLAND; FATTY-ACIDS; RECLAMATION; DECOMPOSITION; POOLS; MICROORGANISMS;
D O I：
10.1016/j.apsoil.2016.11.007
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Seawalls have increasingly been constructed to control the invasion of an exotic perennial grass, Spartina alterniflora, in coastal wetlands of eastern China. We investigated soil organic carbon (C) and nitrogen (N), available and microbial C and N, soil microbial community composition and biomass in a seawall-reclaimed S. alterniflora salt marsh compared with an adjacent natural S. alterniflora salt marsh. Seawall reclamation in S. alterniflora salt marsh significantly decreased soil salinity, moisture, litter and root biomass, and strongly decreased soil total organic C by 57% and total organic N by 59%, and also lowered soil available C and N in S. alterniflora salt marsh. Seawall reclamation significantly decreased soil microbial biomass C and the quantities of the total phospholipid fatty acids (PLFAs), and bacterial, fungal, gram-negative bacterial, gram-positive bacterial, saturated straight-chain, and monounsaturated PLFAs in deeper soil layers (10-30 cm). Our results suggested that seawall construction could greatly decrease soil C and N accumulation of S. alterniflora salt marsh by decreasing S. alterniflora residuals input into the soil and lowering soil salinity and moisture, which further decreased soil microbial biomass by lowering soil available C and N in S. alterniflora salt marsh. Changes in soil microbial community composition and biomass could in turn affect soil C and N accumulation in a seawall-reclaimed S. alterniflora salt marsh in eastern China. (C) 2016 Elsevier B.V. All rights reserved.
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页码：1 / 11
页数：11
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