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Analysis on Environmental Pollution in China’s coastal ecosystem

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Journal of Resources and Ecology 2019年第4期10卷 424-431页

作者： DOU Qun ZHANG Zhenya Graduate School of Life and Environmental Sciences University of Tsukuba Ibaraki 305-8572 Japan

In recent years, with the rapid development of China’s economy, the coastal environment is facing large pressure. However, the coastal environment pollution has not attracted much attention as air pollution and land water pollution. Based on the data on economic development and marine ecosystem environmental pollution which collected from the National Bureau of Statistics and China’s coastal marine environmental monitoring, the paper analyzes the overall coastal ecosystem environment pollution in China as well as the four sea areas the Bohai Sea, the Yellow Sea, the East China Sea and South China Sea. The paper finds that the coastal marine environment pollution differ in different sea areas, taking the seawater quality, over-standard pollutants, water quality of rivers entering seas and coastal marine environmental disasters, such as red tide as index. Couple of policy suggestions provided based on research findings.

关键词： coastal ecosystem environmental pollution China

Promotion effects of salt-alkali on ammonia volatilization in a coastal soil

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Pedosphere 2024年第1期34卷 191-199页

作者： Zhenqi SHI Dongli SHE Yongchun PAN Yongqiu XIA College of Agricultural Science and Engineering Hohai UniversityNanjing 210098China Jiangsu Province Engineering Research Center for Agricultural Soil-Water Efficient Utilization Carbon Sequestration and Emission ReductionNanjing 210098China Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

coastal ecosystems are highly susceptible to salt-related problems due to their formation process and geographical location. As such ecosystems are the most accessible land resources on Earth, clarifying and quantifying the effects of salt-alkali conditions on N concentration and ammonia(NH_(3)) volatilization are pivotal for promoting coastal agricultural productivity. The challenge in establishing this effect is to determine how salt-alkali conditions impact NH_(3) volatilization through direct or indirect interactions. An incubation experiment using a coastal soil from a paddy farmland, combined with the structural equation modeling(SEM) method, was conducted to reveal the net effects of salt-alkali on NH_(3) volatilization and the role of environmental and microbial factors in mutual interaction networks. The specific experimental design consisted of four salt treatments(S1, S2, S3, and S4: 1‰, 3‰, 8‰, and 15‰ NaCl by mass of soil, respectively), four alkaline treatments(A1, A2, A3, and A4: 0.5‰, 1‰, 3‰, and 8‰ NaHCO_(3)by mass of soil, respectively) and a control without NaCl or NaHCO_(3) addition(CK), and each treatment had three urea concentrations(N1, N2, and N3: 0.05, 0.10, and 0.15 g N kg^(-1) soil,respectively) and three replicates. At the N1, N2, and N3 levels, NH_(3)volatilization increased by 9.31%–34.98%, 3.07%–26.92%, and 2.99%–43.61% as the NaCl concentration increased from 1‰ to 15‰, respectively, compared with CK. With an increase in the NaHCO_(3)concentration from 0.5‰ to 8‰, NH_(3) volatilization increased by 8.36%–56.46%, 5.49%–30.10%, and 30.72%–73.18% at the N1, N2, and N3 levels, respectively, compared with CK. According to the SEM method, salinity and alkalinity had positive direct effects on NH_(3)volatilization, with standardized path coefficients of 0.40 and 0.19, *** the total effects(net positive and negative effects) in the SEM results, alkalinity had a greater influence than salinity(total standardized coefficien

关键词： alkalinity coastal ecosystem NH_(3)emission N-transforming microbe salinity structural equation modeling

Multi-Trace Element and Rare Earth Element Composition of coastal Casuarina Equisetifolia ecosystem in Hainan Island,China

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Journal of Rare Earths 2003年第S1期21卷 219-224页

作者：刘强毕华黄澜彭少麟 South China Institute of Botany Chinese Academy of Sciences Geology Department Hainan Normal University Biology Department Hainan Normal University

46 trace elements including 14 rare earth elements (REEs) in coastal Casuarina equisetifolia plant-soil system from 9 sampling sites in Hainan Island were detected by using ICP-MS. The aim is to explore the biogeochemical characteristics of migration and translocation of trace elements in soil-plant system and their function on the changes of environmental geochemistry. The results indicate that multi-trace elements in coastal sandy soil in Hainan Island are at very low level. The multi-element patterns are quite similar among plant,sandy soil and upper continental crust (UCC),and the magnitudes of trace element concentrations among them are different in the general order of plant

关键词： trace elements Casuarina equisetifolia coastal ecosystem rare earths

Floral Diversity Status in Urban coastal Wetland &Associated coastal ecosystems of Crow Island Mattakkuliya, Sri Lanka

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Open Journal of Ecology 2022年第1期12卷 51-65页

作者： Nisitha Yapa Kasunthi Amarasekara Shamali Rathnasri Department of coastal and Marine Resources Management Faculty of Engineering and Management Ocean University of Sri Lanka Colombo 15 Sri Lanka

Colombo is the capital of Sri Lanka and the only wetland city in South Asia under the Ramsar Convention. Crow Island Beach Park and associated coastal area belong to the Colombo urban coastal wetland ecosystems. Crow Island wetland contributes diverse habitats for numerous flora and fauna species. The present study was conducted to assess the status of floral diversity in the Crow Island Beach Park and associated coastal ecosystem during the months of August to October 2021. Study area is divided in to three sites (A, B, C). Line transects method and field observations were used in the study. This coastal wetland consists of mosaic of five major vegetation types: Herbaceous, tree, shrub, creeper, grass and other than that marine algae namely Chaetomorpha antennina, Rhizoclonium africanum, Ulva compressa belonging to chlorophyta (green algae) and Grateloupia lithophila belonging to rhodophyta (red algae) were found in the study area. A total number of 102 flora species belonging to 50 families were recorded from the study area. There were two true mangrove species and 16 mangrove associated species in the study sites. Out of the 102 plant species 46 were recognized and documented as plants with medicinal values. Shannon-Wiener diversity indexes for mangrove and mangrove associated species were recorded as 2.378, 2.304 and 1.676 in site A, B and C respectively. Simpson’s diversity index for mangrove and mangrove associated species was recorded as 0.889, 0.874 and 0.735 respectively in site A, B and C and Jaccard index of similarity between three study sites showed high values ranging from 41% to 69% for mangrove and mangrove associated species.

关键词： Beach Park coastal ecosystem Floral Diversity Seaweeds Urban Wetland Mangrove

A novel herbivorous wood-borer insect outbreak triggers die-offs of a foundation plant species in coastal ecosystems

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ecosystem Health and Sustainability 2020年第1期6卷 39-44,38页

作者： Zhonghua Ning Cong Chen Tian Xie Qing Wang Xu Ma Haochen Sui Baoshan Cui School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Normal UniversityBeijingChina Yellow River Estuary Wetland ecosystem Observation and Research Station Ministry of EducationShandongChina Research and Development Center for Watershed Environmental Eco-Engineering Advanced Institute of Natural ScienceBeijing Normal University at ZhuhaiZhuhaiChina

Introduction:Understanding the trophic interactions between plants and herbivorous insects is essential for managing the ecosystem health and sustainability in the context of climate change and anthropogenic *** Tamarix chinensis is a foundation plant species of salt marshes in northern China,which provides a variety of ecological functions and services in coastal ecosystems such as withstanding storm tide,conserving biodiversity,and preventing shoreline ***:However,through long-term field observations,for the first time,we found that the health of this population has been suffering from the potential outbreak of a novel wood-borer insect(Zeuzera leuconotum Butler)under multiple stresses,contributing substantially to the degradation of the coastal salt *** and Conclusion:Therefore,there is urgent need and great significance to investigate the potential impact of this herbivorous wood-borer insects on health and sustainability of plant community in coastal ecosystems for in-depth understanding its degradation mechanisms.

关键词： Die-off foundation species(Tamarix chinensis) insect herbivory wood-borer pest control salt marsh coastal ecosystem

Distribution and phenogenetic diversity of Synechococcus in the Bohai Sea, China

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Journal of Oceanology and Limnology 2022年第2期40卷 592-604页

作者： Ting WANG Xi CHEN Jialin LI Song QIN College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Lab of coastal Biology and Biological Resource Utilization Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China College of Marine Life Science Ocean University of ChinaQingdao 266005China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Synechococcus is one of the most abundant picocyanobacteria in marine ecosystem,and the absence of Prochlorococcus would make it indispensable as a primary producer in the Bohai Sea,North ***,the abundance distribution and genetic diversity of Synechococcus in this region have rarely been *** this study,the distribution pattern of Synechococcus abundance was investigated during four cruises in April,June,August,and November from 2018 to 2019,moreover,its phenogenetic diversity was studied based on high-throughput sequencing of the cpe BA *** results demonstrate that phycoerythrin-containing Synechococcus was most abundant in August when temperature was high and oxygen saturation was *** this period,Synechococcus pigment type(PT)2 was abundant in the Bohai Bay and Laizhou Bay under conditions of high nutrient concentration,temperature,and *** comparison,PT3,especially those clusters characterized with high or variable ratio of phycourobilin and phycoerythrobilin,was predominant in the Bohai Strait and Liaodong Bay under conditions of high salinity,pH,and oxygen ***,co-occurrence correlations using network analysis revealed that Synechococcus PTs were related to 15.37%-43.48%of the prokaryotic *** PT3c/PT3d and PT2 were the most important PTs in the *** hierarchical clustering revealed that taxa co-occurred with Synechococcus PTs diff ered among *** could be attributed to the substance exchange and the environmental impact,which calls for more studies in the future.

关键词： Synechococcus phenogenetic diversity co-occurrence network coastal ecosystem Bohai Sea

Numerical Study of the Three Gorges Dam Influences on Chlorophyll-a in the Changjiang Estuary and the Adjacent East China Sea

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Journal of Ocean University of China 2021年第1期20卷 10-22页

作者： CHEN Dongxing LIU Qianqian YIN Kedong School of Marine Sciences/Guangdong Key Laboratory of Marine Resources and coastal Engineering Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 510275China Department of Physics and Physical Oceanography University of North Carolina WilmingtonWilmingtonNC 28403USA

The impoundment of the Three Gorges Dam(TGD)has altered downstream hydrological characteristics and sediment discharge,and it has caused ecological impacts,such as changes in chlorophyll-a(Chl-a)in estuaries and coastal *** investigate the TGD's influence on Chl-a's interannual and seasonal variations in the Changjiang Estuary and the adjacent coastal East China Sea,a physical-biogeochemical model was developed with numerical experiments covering a decade,including TGD's preperiod(pre-TGD,1999–2003)and post-period(post-TGD,2004–2008).The modeling results demonstrate an annual increase in the regional average Chl-a from pre-to post-TGD,with the largest increase reaching up to 20.8%in spring in the nearshore region beyond the Changjiang *** spatial variations in Chl-a are high,with the largest variation being observed around the 20–40 m *** increase in Chl-a is influenced by improved light and nutrient conditions,which is attributed to dam construction and fertilization by human activities.A decline in nitrogen-phosphorus fertilizer usage ratio along the Changjiang River watershed after the TGD's impoundment is another factor that influences the Chl-a's *** modeling results also show severe NO3 and PO4 imbalances with a larger N/P ratio during the post-TGD period,especially in regions with large Chl-a ***,the greater increase in the usage of phosphorus fertilizer than nitrogen fertilizer influences Chl-a's variation and has potential promotion effects on the outbreak of harmful algal bloom events.

关键词： physical-biogeochemical model Chl-a coastal ecosystem East China Sea

The decomposition rate of the organic carbon content of suspended particulate matter in the tropical seagrass meadows

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Acta Oceanologica Sinica 2021年第8期40卷 44-52页

作者： A'an Johan Wahyudi Karlina Triana Afdal Afdal Hanif Budi Prayitno Edwards Taufiqurrahman Hanny Meirinawati Rachma Puspitasari Lestari Lestari Suci Lastrini Research Center for Oceanography Indonesian Institute of Sciences(LIPI)Jakarta 14430Indonesia

In terms of downward transport,suspended particulate matter(SPM)from marine or terrigenous sources is an essential contributor to the carbon *** mesoscale environments such as seagrass ecosystems,SPM flux is an essential part of the total carbon budget that is transported within the *** assessing the total SPM transport from water column to sediment,potential carbon burial can be ***,SPM may decompose or reforming aggregate during transport,so estimating the vertical flux without knowing the decomposition rate will lead to over-or underestimation of the total carbon *** this paper presents the potential decomposition rate of the SPM in seagrass ecosystems in an attempt to elucidate the carbon dynamics of *** was collected from the seagrass ecosystems located at Sikka and Sorong in *** situ experiments using SPM traps were conducted to assess the vertical downward flux and decomposition rate of *** isotopic profile of SPM was measured together with organic carbon and total nitrogen *** results show that SPM was transported to the bottom of the seagrass ecosystem at a rate of up to(129.45±53.79)mg/(m^(2)·h)(according to carbon).Considering the whole period of inundation of seagrass meadows,SPM downward flux reached a maximum of 3096 mg/(m^(2)·d)(according to carbon).The decomposition rate was estimated at from 5.9μg/(mg·d)(according to carbon)to 26.6μg/(mg·d)(according to carbon).Considering the total downward flux of SPM in the study site,the maximum decomposed SPM was estimated 39.9 mg/(m^(2)·d)(according to carbon)and 82.6 mg/(m^(2)·d)(according to carbon)for study site at Sorong and Sikka,*** decomposed SPM can be 0.6%–2.7%of the total SPM flux,indicating that it is a small proportion of the total *** seagrass ecosystems of Sorong and Sikka SPM show an autochthonous tendency with the primary composition of marine-end materials.

关键词： carbon dynamic biogeochemistry coastal ecosystem particulate matter

Spatiotemporal dynamics of coastal aquaculture and driving force analysis in Southeastern China

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ecosystem Health and Sustainability 2020年第1期6卷 593-604,592页

作者： Zimin Ying Jing Wu Tomas Marin Del Valle Wu Yang College of Environmental and Resource Sciences Zhejiang UniversityHangzhouChina

Introduction:Large-scale disordered coastal aquaculture development causes severe environmental ***,quantitative assessments of spatiotemporal dynamics and driving factors for coastal aquaculture are essential and urgent for coastal aquaculture ***:Using remote sensing products and geographic information science,we investigated the long-term landscape changes due to coastal aquaculture,and explored its underlying driving factors in the Ningde coastal region,Southeastern *** show that coastal aquaculture area increased from 90.65 km2 in 2003 to 96.08 km^(2) in 2016,and its structure underwent tremendous *** area of artificial shrimp ponds increased by 496.15%and the area of farmland ponds decreased by 25.81%between 2003 and *** addition,we revealed that from 2003 to 2016,the change trends of the coastal aquaculture area and the entire Ningde coastal region were consistent,and became more fragmented and ***,regression results indicate that the growth and attenuation of coastal aquaculture areas were significantly affected by the initial coastal aquaculture area in *** and Conclusion:To sustainably manage the coastal ecosystems,we provide several recommendations(e.g.,a coupled human and natural systems approach to understanding human-nature interactions,integrated assessment,and systematical spatial planning and monitoring)for future research and management.

关键词： coastal ecosystem coastal management ecological civilization land use and land cover change marine ranching remote sensing