Coastal salt marshes are important terrestrial ecosystems, soil is one of the main accumulation pools of the organic carbon, nitrogen and phosphorus, which plays an important role in the global carbon, nitrogen and phosphorus cycles. In order to better define particularity of SOM, TN, and TP distribution along the spatial gradient about interactions between the tide and of vegetation, the contents of SOM, TN, and TP were seasonally measured along two elevational gradients of a coastal salt marsh of eastern China. Main results are as follows, the tide and vegetation interaction is factor of impact on temporal and spatial variation of SOM, TN, and TP in coastal salt marsh, with respect to the effects of tidal influence vegetation is more stable and persistent; Spatial and month variation of SOM and TN content of salt marsh are significant, spatial variation includes change along gradient of vegetation (tide) and differences between the (tidal currents) of transects, the content of vegetation zone is higher than that of tidal flat along gradient of vegetation (tide), the content of SOM, TN, and TP show decreasing from sea to land on vegetation zones, that is Spartina alterniflora>Suaeda salsa>Aeluropus littoralis>Phragmites australis; Difference between two transects of SOM shows that content of SOM, TN, and TP far tidal creeks greater than that of near tidal creek at low salt marsh, and content of SOM, TN, and TP near tidal creek greater than that of far tidal creeks at median salt marsh, spatial and temporal variation of TP is not significant; pH, soil moisture, salt content and other directly related to the tidal effect factor are negative correlation to distance away from the sea, contents of SOM, TN, and TP are also negative correlation to distance away from the sea, and the contents of SOM, TN, and TP are positively correlated to pH, soil moisture and salt content and other factors, to a certain extent, it explained that tidal influence on contents and variation of SOM, TN, and TP.
. 影响海岸带盐沼土壤有机质、TN和TP含量时空变化的关键因子：潮水和植被[J]. 地理科学,
2016, 36(2): 247-255.
Nan Guo et al
. The Key Factor of Impact on Temporal and Spatial Variation of Soil Organic Matter, TN and TP in Coastal Salt Marsh: Tide and Vegetation[J]. SCIENTIA GEOGRAPHICA SINICA,
2016, 36(2): 247-255.
[BaiJunhong, DengWei, ZhuYanming, et al.Comparactive study on the distribution characteristics of soil organic matter and total nitrogen in wetlands.—A case study of Xianghai and Horqin nature reserve., 2002, 22(2): 232-237.]
[ WangGang, YangWenbin, WangGuoxiang, et al.The effects of Spartina alterniflora seaward invasion on soil organic carbon fractions, sources and distribution. , 2013, 33(8):2474-2483.]
de Boer WF,RydbergL, SaideV.Tides,tidal currents and their effects on the intertidal ecosystem of the southern bay,Inhaca Island,Mozambique[J].,2000,428(1):187-196./s?wd=paperuri%3A%281583ec19bc319d73a8942208a06e5f24%29&filter=sc_long_sign&sc_ks_para=q%3DTides%2C%20tidal%20currents%20and%20their%20effects%20on%20the%20intertidal%20ecosystem%20of%20the%20southern%20bay%2C%20Inhaca%20Island%2C%20Mozambique&sc_us=1626110576308615576&tn=SE_baiduxueshu_c1gjeupa&ie=utf-8
Tew KS,Meng PJ,Lee HJ,et al.Dynamics of phytoplankton and picoplankton over a tidal cycle in a subtropical lagoon[J].,2010,55(23):2522-2528.http://www.cnki.com.cn/Article/CJFDTotal-JXTW201023009.htm
The influences of a tidal cycle on the distribution of autotrophic plankton were investigated in a hyper-eutrophic lagoon designated as a scenic area.Results showed that the highest concentrations of picoplankton and phytoplankton were found in the middle and inner part of the lagoon,irrespective of the tides.The MDS result also revealed that phytoplankton communities,dominated by Ceratium furca,were similar among stations in the inner bay during both flood tides and ebb tides.The time series sampling results at the inlet-outlet channel revealed that almost the same amounts of phytoplankton and picoplankton were carried through the channel during flood and ebb tides,with no trend in nutrient fluctuations except for phosphate which had a net loss from the lagoon.The results showed that tidal cycles do not effectively flush away phytoplankton and picoplankton from the lagoon,and the blooming of phytoand picoplankton is inevitable should the situation stay the same.Steps are needed to alleviate the eutrophication condition instead of depending on the natural process such as tidal cycle.
Lewis DB,Brown JA,Jimenez KL.Effects of flooding and warming on soil organic matter mineralization in Avicennia germinans mangrove forests and Juncus roemerianus salt marshes[J]. ,2014,139(1):11-19.
Morrissey EM,Gillespie JL,Morina, JC,et al.Salinity affects microbial activity and soil organic matter content in tidal wetlands[J].,2014,20(4):1351-1362,April.http://med.wanfangdata.com.cn/Paper/Detail/PeriodicalPaper_PM24307658
Abstract Climate change-associated sea level rise is expected to cause saltwater intrusion into many historically freshwater ecosystems. Of particular concern are tidal freshwater wetlands, which perform several important ecological functions including carbon sequestration. To predict the impact of saltwater intrusion in these environments, we must first gain a better understanding of how salinity regulates decomposition in natural systems. This study sampled eight tidal wetlands ranging from freshwater to oligohaline (0–2 ppt) in four rivers near the Chesapeake Bay (Virginia). To help isolate salinity effects, sites were selected to be highly similar in terms of plant community composition and tidal influence. Overall, salinity was found to be strongly negatively correlated with soil organic matter content (OM%) and C:N, but unrelated to the other studied environmental parameters (pH, redox, and above- and below-ground plant biomass). Partial correlation analysis, controlling for these environmental covariates, supported direct effects of salinity on the activity of carbon-degrading extracellular enzymes (β-1, 4-glucosidase, 1, 4-β-cellobiosidase, β-D-xylosidase, and phenol oxidase) as well as alkaline phosphatase, using a per unit OM basis. As enzyme activity is the putative rate-limiting step in decomposition, enhanced activity due to salinity increases could dramatically affect soil OM accumulation. Salinity was also found to be positively related to bacterial abundance (qPCR of the 16S rRNA gene) and tightly linked with community composition (T-RFLP). Furthermore, strong relationships were found between bacterial abundance and/or composition with the activity of specific enzymes (1, 4-β-cellobiosidase, arylsulfatase, alkaline phosphatase, and phenol oxidase) suggesting salinity's impact on decomposition could be due, at least in part, to its effect on the bacterial community. Together, these results indicate that salinity increases microbial decomposition rates in low salinity wetlands, and suggests that these ecosystems may experience decreased soil OM accumulation, accretion, and carbon sequestration rates even with modest levels of saltwater intrusion.
[SunZhigao, MouXiaojie,WangLingling,et al.Effects of sedimentation intensity on decomposition and nitrogen dynamics of Suaeda salsa litters in salt marshes in tidal bank of the Yellow river estuary. , 2015, 13(2): 135-143.]
[LiuWenlong, XieWenxia, ZhaoQuansheng,et al.Spatial distribution and ecological stoichiometry characteristics of carbon, nitrogen and phosphorus in soil in Phragmites australis tidal flat of Jiaozhou bay. , 2014,12(3):362-368.]