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Acta Oceanologica Sinica 2010年第6期29卷 62-72页

作者： WANG Chu YAO Dongjing HE Baogen ZHOU Naisheng XU Shiyuan Department of Geography Shanghai Normal University Shanghai 200234 China Department of Geography College of Resource and Environmental Science East China Normal University Shanghai 200062 China

Between April 2002 and April 2003,in situ measurements of water depth,current velocity and suspended sediment content were carried out in edge region of East Chongming salt marsh and neighboring bald flat in the Changjiang （Yangtze） Estuary under different weather ***-shore suspended sediment flux was calculated and *** results show that under calm weather conditions,the current velocity process in bald field and salt marsh area varied differently during semidiurnal tidal *** to current velocity asymmetry,mean SSC during flood tide phase was 1.8 times higher than that of ebb tide *** a result,net onshore sediment flux controlled cross-shore suspended sediment transport process and salt marsh pioneer zone was generally *** was significant positive correlation between total sediment flux and quartic power of maximum water *** indicates that tidal ranges dominate suspended sediment transport and sedimentation process in the salt marsh pioneer zone under the calm weather *** sedimentation rate on the adjacent mudflat was higher than the salt marsh,which induced stable accreting of salt marsh towards the *** wind events enhanced SSC and current velocity during the semidiurnal *** the remarkable onshore net sediment flux could occur on the high marsh and mudflat close to the marsh fringe during the short period under the rough weather condition.

关键词： current velocity suspended sediment content flux salt marsh eastern beach

Characterization of dissolved organic matter in submarine groundwater from a salt marsh in Chongming Island,China

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Journal of Oceanology and Limnology 2022年第1期40卷 128-141页

作者： Tangrong HE Fenfen ZHANG Yali WANG Xiaogang CHEN Jinzhou DU State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China Institute of Eco-Chongming(IEC) Shanghai 202162China Key Laboratory of Coastal Environment and Resources of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China

salt marshes are research hotspots of the carbon cycle in coastal zones because large amounts of atmospheric carbon dioxide is fi xed by salt marshes vegetation and stored in its biomass and *** organic carbon(DOC)in submarine groundwater(well water and pore water)in salt marshes plays an important role in advective exchange between the salt marshes and coastal ***,the molecular characteristics of DOC in salt marsh groundwater are poorly understood because of the complex DOC structures and hydrodynamic *** this study,fl uorescent components and refractory DOC(RDOC)in submarine groundwater from a salt marsh(Chongming Island,China)and adjacent coastal water were characterized by fl uorescence spectroscopy and nuclear magnetic resonance *** fl uorescent components identifi ed by parallel factor analysis indicated that humic-like substances dominated the chromophoric dissolved organic matter in the submarine *** chromophoric dissolved organic matter and dissolved organic matter in the submarine groundwater had non-conservative behaviors because of additions from terrestrial humic *** nuclear magnetic resonance spectra indicated that bioactive substances(carbohydrates)contributed only 13.2%-14.8%of the dissolved organic matter in the submarine groundwater but carboxyl-rich alicyclic molecules(CRAMs),the main components of RDOC,contributed 64.5%of the dissolved organic *** and CRAMs contributed 16.4%and 61.7%of the dissolved organic matter in the coastal water,similar to the contributions for submarine *** DOC concentration in submarine groundwater was 386±294μmol/L,which was signifi cantly higher than that in coastal water(91±19μmol/L).The high DOC concentrations and>60%relative RDOC content suggested that submarine groundwater may be an important source of RDOC to coastal *** information will be helpful for estimating the climate eff ects of salt marsh blue carbon.

关键词： submarine groundwater dissolved organic carbon fl uorescence refractory dissolved organic carbon salt marsh Chongming Island

Composition of fish communities in an intertidal salt marsh creek in the Changjiang River estuary,China

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Chinese Journal of Oceanology and Limnology 2009年第4期27卷 806-815页

作者：全为民倪勇施利燕陈亚瞿 Key and Open Laboratory of Marine and Estuarine Fishery Ministry of AgricultureEast China Sea Fishery Research InstituteChinese Academy of Fishery Sciences

Fish communities in a （third-order） intertidal creek in Dongtan marsh in the Changjiang （Yangtze） River estuary were investigated seasonally for one year. A total of 1 996 fish specimens （10 967.8 g） comprising 26 species and 15 families were collected. Abundances of fish communities in the intertidal salt marsh creek were primarily dominated by Boleophthalmus pectinirostris （19.8%）, Collichthys lucidus （18.6%）, Periophthalmus magnuspinnatus （18.2%）, Liza haematocheilus （17.9%）, and secondarily by Mugilogobius abel （8.5%）, L. carinatus （7.2%）, Odontamblyopus lacepedii （4.3%）, and Acanthogobius ommaturus （3.9%）; another 18 species were present only occasionally. Non-MDS ordination and SIMPER analysis indicated that there were two fish communities in the intertidal salt marsh creek. In spring, the communities were dominated by B. pectinirostris, P. magnuspinnatus, C. lucidus and M. abei; in summer, autumn, and winter by L. haematocheilus, L. carinatus, A. ommaturus and O. lacepedii. Some species showed strong habitat selection; L. carinatus and P magnuspinnatus were distributed mainly in the upper and middle creek, while B. pectinirostris, M. abei and O. lacepedii inhabited the middle and lower creek. The study indicated that the salt marshes of the Changjiang River estuary are an important nursery and feeding habitat for many fishes and should be protected.

关键词： fish communities habitat nursery tidal creek salt marsh Changjiang (Yangtze) River estuary

Response of microbial biomass and bacterial community composition to fertilization in a salt marsh in China

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Acta Oceanologica Sinica 2017年第6期36卷 80-88页

作者： MA Yuexin TAO Wei LIU Changfa LIU Jiao YANG Zhiping LI Jin LIU Jichen Key Laboratory of Mariculture and Stock Enhancement in North China's Sea of Ministry of Agriculture Dalian Ocean UniversityDalian 116023China Key Laboratory of Marine Environmental Research of Liaoning Higher Education Dalian 116023China Dalian Huixin Titanium Equipment Development Company Limited Dalian 116039China Institute of Ocean and Fisheries of Panjin Panjin 124001China

The effects of nitrogen （N） addition on microbial biomass, bacterial abundance, and community composition in sediment colonized by Suaeda heteroptera were examined by chloroform fumigation extraction method, real-time quantitative polymerase chain reaction, and denaturing gradient gel electrophoresis （DGGE） in a salt marsh located in Shuangtai Estuary, China. The sediment samples were collected from plots treated with different amounts of a single N fertilizer （urea supplied at 0.1, 0.2, 0.4 and 0.8 g/kg （nitrogen content in sediment） and different forms of N fertilizers （urea, （NH4）2SO4, and NH4NO3, each supplied at 0.2 g/kg （calculated by nitrogen）. The fertilizers were applied 1-4 times during the plant-growing season in May, luly, August, and September of 2013. Untreated plots were included as a control. The results showed that both the amount and form of N positively influenced microbial biomass carbon, microbial biomass nitrogen, and bacterial abundance. The DGGE profiles revealed that the bacterial community composition was also affected by the amount and form of N. Thus, our findings indicate that short-term N amendment increases microbial biomass and bacterial abundance, and alters the structure of bacterial community.

关键词： fertilization microbial biomass 16S rRNA gene abundance bacterial community salt marsh

Halophyte Vegetation Influences Soil Microbial Community of Coastal salt marsh

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Journal of Ocean University of China 2022年第6期21卷 1549-1556页

作者： GU Chen SHI Jiyan RUI Jianliang YU Yanming HUANG Weibin LU Zhinai CHEN Yao CHEN Xiaojun DONG Shudi HU Zhijun YE Chenghua Power China Huadong Engineering Corporation Limited Hangzhou 311122China MOE Key Laboratory of Environmental Remediation and Ecosystem Health and Institute of Soil and Water Resources and Environmental ScienceCollege of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Coastal wetlands are the most productive ecosystems worldwide and can provide important ecosystem services,yet the characteristics of microbial community within these systems remain poorly *** community of salt marsh vegetation and the associated soil physio-chemical properties were investigated in this *** typical Suaeda australis,Phragmites australis,Spartina alterniflora wetlands,and non-vegetated bare mudflats in the Zhoushan Islands were studied to advance the understanding of the characteristics of soil bacterial communities in coastal *** showed that the bare mudflats exhibited high pH value and soil moisture content compared with the vegetated *** different vegetation types,the organic matter content,total nitrogen,and total potassium content decreased in the order:*** wetland>*** wetland>*** wetland,and there was no obvious difference in total phosphorous *** halophytes could decrease soil salinity compared with bare ***,Nitrospinae,Bacteroidetes,Acidobacteria,and Nitrospirae were the predominant level across all *** prediction showed that SPA-covered soil might play vital roles in sulphur cycling,while SUA and PHR covered soils were involved in nitrogen *** study could provide the first insight into the microbial community of this study area and contribute to a better understanding of vegetation microbiota and bioremediation in coastal wetland ecosystem.

关键词： illumina sequencing salt marsh vegetation type soil bacterial community function prediction

Biomass Allocation of Scirpus mariqueter Along an Elevational Gradient in a salt marsh of the Yangtse River Estuary

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Acta Botanica Sinica 2001年第2期43卷 178-185页

作者：孙书存蔡永立刘红华东师范大学河口海岸国家重点实验室上海200062 华东师范大学环境科学系上海200062 曲阜师范大学地理系山东曲阜250041

Scirpus mariqueter Tang et Zhang is a typical pioneer plant colonizing the bare beaches of the Yangtse River estuary. To explore the life history strategy of the species with reference to environmental physical stress, the biomass allocations to different plant components and some related morphological parameters were examined along an elevational gradient within a salt marsh. Authors found that S. mariqueter performed best at medium elevation within the marsh, with relatively high density of shoot and individual ramet dry mass. Biomass allocation to corm was the highest at low elevations, and the least at high elevations, suggesting that a conservative strategy was adopted by the species to cope with the harsh physical conditions at the low elevation. The investment in rhizome decreased from low to high elevations, while the proportion of inflorescence mass increased, indicating that during the life history, the species shifts from predominant asexual reproduction to predominant sexual reproduction. This may be favourable for the species to colonize larger area, and to spread and persist at a meta_population level. Correlation analyses showed that sexual reproduction was inversely related to growth and asexual reproduction. However, it is difficult to determine the relationship between asexual reproduction and growth possibly because of the varied function of the corms of the species in different life history stages.

关键词： asexual reproduction corm salt marsh sexual reproduction life history strategy trade_off

Trends of soil organic matter turnover in the salt marsh of the Yangtze River estuary

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Journal of Geographical Sciences 2007年第1期17卷 101-113页

作者： CHEN Qingqiang GU Hequan ZHOU Juzhen MENG Yi HU Kelin State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai 200062 China

Characteristics and tidal flat trends of soil organic matter （SOM） turnover were studied for the Chongmingdongtan salt marsh in the Yangtze River estuary, based on analyses of stable carbon isotope composition （δ^13C）, grain sizes and contents of particulate organic carbon （POC）, total nitrogen （TN） and inorganic carbon （TIC） for three cores excavated from high tidal flat, middle tidal flat and bare flat. Results demonstrate that correlations between soil POC contents and δ^13C values of the salt marsh cores were similar to those between soil organic carbon （SOC） contents and δ^13C values of the upper soil layers of mountainous soil profiles with different altitudes. SOM of salt marsh was generally younger than 100 years, and originated mainly from topsoil erosions in catchments of the Yangtze River. Correlations of TN content with C/N ratio, POC content with TIC content and POC content with δ^13C values for the cores suggest that turnover degrees of SOM from the salt marsh are overall low, and trends of SOM turnover are clear from the bare flat to the high tidal flat. Bare flat samples show characteristics of original sediments, with minor SOM turnover. Turnover processes of SOM have occurred and are discernable in the high and middle tidal flats, and the mixing degrees of SOM compartments with different turnover rates increase with evolution of the muddy tidal flat. The exclusive strata structure of alternate muddy laminae and silty laminae originated from dynamic depositional processes on muddy tidal flat was a great obstacle to vertical migration of dissolved materials, and SOM turnover was then constrained. The muddy tidal flat processes exerted direct influences on sequestration and turnover of SOM in the salt marsh, and had great constraints on the spatial and temporal characteristics of SOM turnover of the Chongmingdongtan salt marsh in the Yangtze River estuary.

关键词： salt marsh soil organic carbon carbon cycling soil organic matter turnover the Yangtze River estuary

EXTRACELLULAR ENZYME ACTIVITIES AND DECOMPOSITIN PROCESSES IN salt marsh AND INTERTIDAL FLAT SEDIMENTS

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EXTRACELLULAR ENZYME ACTIVITIES AND DECOMPOSITIN PROCESSES I...

Impact of Sediment Supply on Spartina salt marshes

第三世界生态高峰会

作者： Jung S.H. Department of Environmental Science and Engineering Ewha Womans University:

salt marsh and intertidal flat are common transition systems developed in temperate coastal *** regulate the flux of materials and the flow of energy between land and marine *** are known to play a major role in those regulations,and,extracellular enzymes excreted by microorganisms are particularly important in decomposition and nutrient release processes in *** this study β-glucosidase,N-acetylglucosaminidase,aminopeptidase activities in sediment of salt marsh and intertidal flat in Ganghwa island,Korea, were determined along with nutrients（DON,NO,NH）,Chl-a and DOC in sediments of two salt marshes（Vegetations:Phragmites australis,Suaeda japonica）and two intertidal *** aim of this study was to address the contributions of extracellular enzyme activities to decomposition and nutrient release processes in *** extracellular enzyme activities were higher in salt marsh than in intertidal flat sediments,while Chl-a and NO concentrations were higher in intertidal flat *** addition,both DOC and DON

关键词： salt marsh intertidal flat extracellular enzyme activities

来源： cnki会议评论

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Pedosphere 2008年第5期18卷 593-598页

作者： SHEN Yong-Ming YANG Jing-Song WANG Yan-Hong FENG Nian-Hua ZHOU Qin ZENG Hua Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）. Department of Geography Nanjing Xiaozhuang College Nanjing 210097 （China） River and Harbor Engineering Department Nanjing Hydraulic Research Institute Nanjing 210024 （China）

During the past century,natural and human modifications of environmental systems have greatly accelerated coastal salt marsh deterioration and shoreline retreat in many regions worldwide. Field investigation,profile analysis,geographical information analysis,and remote sensing were employed in combination to study the effect of sediment on Spartina alterniflora salt marshes of the coast in Jiangsu Province,East China. The results indicated that the propagation of Spartina alterniflora salt marshes was closely related to regional sediment conditions,especially the supply of fine-grained materials. Additionally,because of the dense and high grass in Spartina alterniflora salt marshes,wave energy and tidal currents were baffled and weaker than those of the adjacent,unvegetated mud flats. Fine sediment was hardly resuspended under the low energy conditions in the Spartina alterniflora salt marshes.

关键词： cost salt marsh sediment supply Spartina alterniflora tidal mud flat

A systematic review of morphological models of salt marshes

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Water Science and Engineering 2023年第4期16卷 313-323页

作者： Xin-chen Wang Pei Xin Zeng Zhou Fu-xin Zhang College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China State Key Laboratory of Hydrology–Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing 210098China

salt marshes are among the most important coastal wetlands and provide critical ecological services,including climate regulation,biodiversity maintenance,and blue carbon ***,most salt marshes worldwide are shrinking,owing to the effects of natural and human factors,such as climate change and artificial ***,it is essential to understand the decline in the morphological processes of salt marshes,and accordingly,the likely evolution of these marshes,in order to enable measures to be taken to mitigate this *** this end,this study presented an extensive systematic review of the current state of morphological models and their application to salt *** emergence of process-based(PB)and data-driven(DD)models has contributed to the development of morphological *** morphodynamic simulations in PB models,multiple physical and biological factors(e.g.,the hydrodynamics of water bodies,sediment erosion,sediment deposition,and vegetation type)have been *** systematic review revealed that PB models have been extended to a broader interdisciplinary ***,most DD models are based on remote sensing database for the prediction of morphological characteristics with latent *** to DD models,PB models are more transparent but can be complex and require a lot of computational ***,to make up for the shortcomings of each model,future studies could couple PB with DD models that consider vegetation,microorganisms,and benthic animals together to simulate or predict the biogeomorphology of salt marsh ***,this review found that there is a lack of unified metrics to evaluate model performance,so it is important to define clear objectives,use multiple metrics,compare multiple models,incorporate uncertainty,and involve experts in the field to provide guidance in the further study.

关键词： Morphology salt marsh Predictive modeling Tidal creek Tidal flat