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Restorating marine coastal ecosystem health as a new goad for integrated catchment management in Tolo Harbour,Hong Kong,China

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Chinese Journal of Population,Resources and Environment 2004年第2期2卷 11-19页

作者： Lam K.C. Department of Geography and Resoure management The Chinese University of Hong Kong.ShatinNew TerritoriesHong KongChinahe paper demonstrates why it is necessary to take the restoration of marine coastal ecosystem health as a new goal for integrated catchment management in coastal area of the Tolo Harbour. The present goal of integrated catchment management (ICM) in the Tolo Harbour is to meet with Water Quality Objectives. The performance of an ICM plan Tolo Harbour Action Plan (THAP) is evaluated by using marine coastal ecosystem health indicators including stress indicators and responses indicators. Since the implementation of THAP in 1988 some significant reduction in pollution loading has been observed - reduction of 83 % of BOD load and 82 % of TN between 1988 and 1999. There has been an improvement in the health state of Tolo Harbour marine coastal ecosystem as evidenced in the trends of the physical chemical and biological indicators although some reverse fluctuations in some periods exist. However this can only be considered as the first sign of the ecosystem health restoration since ecosystem health covers not only physical chemical and biological aspects of an ecosystem but also ecosystem-service-function aspect. It is recommended to take the restoration and protection of marine coastal ecosystem health as a new goal instead of water quality objective management for integrated catchment management in Tolo Harbour catchment. Steps to further improve the marine coastal ecosystem health of Tolo harbour are discussed in the paper.

The paper demonstrates why it is necessary to take the restoration of marine coastal ecosystem health as a new goal for integrated catchment management, in coastal area of the Tolo Harbour. The present goal of integrated catchment management (ICM) in the Tolo Harbour is to meet with Water Quality Objectives. The performance of an ICM plan, Tolo Harbour Action Plan (THAP), is evaluated by using marine coastal ecosystem health indicators including stress indicators and responses indicators. Since the implementation of THAP in 1988, some significant reduction in pollution loading has been observed - reduction of 83 % of BOD load and 82 % of TN between 1988 and 1999. There has been an improvement in the health state of Tolo Harbour marine coastal ecosystem as evidenced in the trends of the physical, chemical and biological indicators, although some reverse fluctuations in some periods exist. However, this can only be considered as the first sign of the ecosystem health restoration, since ecosystem health

关键词： Marine coastal ecosystem health integrated catchment management pollution loading indicator Tolo Harbour Action Plan.

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Phosphorus deficiency affects multiple macromolecular biosynthesis pathways of Thalassiosira weissflogii

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Acta Oceanologica Sinica 2014年第4期33卷 85-91页

作者： WANG Xiuxiu HUANG Bangqin ZHANG Huan Key Laboratory of the Ministry of Education for coastal and Wetland ecosystem Xiamen University State Key Laboratory of Marine Environmental Science Xiamen University Department of Marine Sciences University of Connecticut

Phosphorus（P） is one of the key nutrients for the growth of phytoplankton. In this study, we used a method coupling label-free quantitation with liquid chromatography–mass spectrometry（LFQ–LC–MS/MS） to track the change of relative protein abundance between P-replete and P-deficient treatments in a non-model diatom, Thalassiosira weissflogii. Out of the 631 proteins identified, 132 were found to have significant changes in abundance（〉1.5 folds） between the two treatments, especially those proteins involved in macromolecular biosynthesis pathways. For example, the up-regulation of sulfolipid biosynthesis protein in the P-deficient culture suggested a switch from using phospholipids to sulfolipids. In addition, the ribosome subunits and tRNA synthetases were down-regulated, which might explain the decrease in protein content in the P-deficient culture. A vacuolar sorting receptor homologous protein was found to be 9.2-folds up-regulated under P-deficiency, indicating an enhancement in the vacuolar sorting pathway for protein degradation. Our results show that T. weissflogii has sophisticated responses in multiple macromolecular metabolism pathways under P-deficiency, a mechanism which can be critical for this species to survive under various levels of P availability in the environment

关键词： phosphorus deficiency Thalassiosira weissflogii LFQ–LC–MS/MS sulfolipid biosynthesis protein

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Effects of Vegetation Restoration Age on Soil C:N:P Stoichiometry in Yellow River Delta coastal Wetland of China

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Chinese Geographical Science 2024年第6期34卷 1045-1059页

作者： CAO Qixue WANG Xiaojie CHU Xiaojing ZHAO Mingliang WANG Lianjing SONG Weimin LI Peiguang ZHANG Xiaoshuai XU Shendong HAN Guangxuan School of Geography and Environment Liaocheng UniversityLiaocheng 252000China Key Laboratory of coastal Zone Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Yellow River Delta Field Observation and Research Station of coastal Wetland ecosystem Chinese Academy of SciencesDongying 257500China

Vegetation restoration can alter carbon(C),nitrogen(N),and phosphorus(P)cycles in coastal wetlands affecting C:N:P ***,the effects of restoration age on soil C:N:P stoichiometry are *** this study,we examined the re-sponses of soil C,N,and P contents and their stoichiometric ratios to vegetation restoration age,focusing on below-ground processes and their relationships to aboveground vegetation community *** conducted an analysis of temporal gradients based on the'space for time'method to synthesize the effects of restoration age on soil C:N:P stoichiometry in the Yellow River Delta wetland of *** findings suggest that the combined effects of restoration age and soil depth create complex patterns of shifting soil C:N:P ***,restoration age significantly increased all topsoil C:N:P stoichiometries,except for soil total phosphorus(TP)and the C:N ratio,and slightly affected subsoil C:N:P *** effects of restoration age on the soil C:N ratio was well constrained owing to the coupled relationship between soil organic carbon(SOC)and total nitrogen(TN)contents,while soil TP con-tent was closely related to changes in plant species ***,we found that the topsoil C:N:P stoichiometry was signific-antly affected by plant species diversity,whereas the subsoil C:N:P stoichiometry was more easily regulated by pH and electric con-ductivity(EC).Overall,this study shows that vegetation restoration age elevated SOC and N contents and alleviated N limitation,which is useful for further assessing soil C:N:P stoichiometry in coastal restoration wetlands.

关键词： coastal wetland restoration age soil C:N:P stoichiometry soil properties plant species diversity Yellow River Delta of China

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Benthic bacterial communities indicate anthropogenic activity footprints in coastal area under long-term marine spatial planning practice

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Acta Oceanologica Sinica 2023年第11期42卷 107-116页

作者： Yi Sun Hongjun Li Daixi Liu Xiaocheng Wang Quanming Wang Xiaoyu Cui Jingfeng Fan State Environmental Protection Key Laboratory of coastal ecosystem National Marine Environmental Monitoring CenterDalian 116023China Institute of Marine Science and Technology Shandong UniversityQingdao 250100China

Marine spatial planning(MSP)is designed to divide the sea area into different types of functional zones,to implement corresponding development ***,the long-term impacts of anthropogenic activities associated with MSP practice on the marine microbial biosphere are still *** River Estuary,a coastal region in northeast of China,has been divided into fishery&agricultural(F&A)zone,shipping&port(S&P)zone and marine protected area(MPA)zone by a local MSP guideline that has been run for *** examine the effects of long-term executed MSP,benthic bacterial communities from different MSP zones were obtained and compared in this *** results revealed significant differences in the bacterial community structure and predict functions among different *** genera enriched in different zones were identified,including SBR1031 in MPA,Woeseia and Sva0996 in S&P,and Halioglobus in F&*** addition,correlations between some bacterial genera and sediment pollutants were ***,bacteria related to sulphide production were more abundant in the F&A zone,which was according to the accumulation of sulphides in this ***,bacteria associated with chemoheterotrophy and fermentation were more predominant in the S&P zone,consistent with high levels of organic matter and petroleum caused by *** findings indicated benthic bacterial communities could bring to light the anthropogenic activity footprints by different activities induced by long-term MSP practice.

关键词： bacterial community structure predicted function marine spatial planning anthropogenic activity

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Weak coupling between heterotrophic nanoflagellates and bacteria in the Yellow Sea Cold Water Mass area

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Acta Oceanologica Sinica 2014年第9期33卷 125-132页

作者： LIN Shiquan HUANG Lingfeng LU Jiachang Key Laboratory of Marine ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration Key Laboratory of the Ministry of Education for coastal and Wetland ecosystems (Xiamen University) College of Ocean and Earth Sciences Xiamen University

A study was carried out to investigate the grazing pressure of heterotrophic nanoflagellates （HNF） on bac-teria assemblages in the Yellow Sea Cold Water Mass （YSCWM） area in October, 2006. The results show that the HNF abundance ranges from 303 to 1388 mL-1, with a mean of 884 mL-1. The HNF biomass is equivalent to 10.6%-115.6% of that of the bacteria. The maximum abundance of the HNF generally occurred in the upper 30 m water layer, with a vertical distribution pattern of surface layer abundance greater than middle layer abundance, then bottom layer abundance. The hydrological data show that the YSCWM is located in the northeastern part of the study area, typically 40 m beneath the surface. A weak correlation is found be- tween the abundances of HNF and bacteria in both the YSCWM and its above water layer. One-way ANOVA analysis reveals that the abundance of HNF and bacteria differs between inside the YSCWM and in the above water mass. The ingestion rates of the HNF on bacteria was 8.02±3.43 h-1 in average. The grazing rate only represented 22.75%±6.91% of bacterial biomass or 6.55%±4.24% of bacterial production, implying that the HNF razinR was not the major factor contributing to the bacterial loss in the YSCWM areas.

关键词： Yellow Sea Cold Water Mass heterotrophic nanoflagellates bacteria trophic coupling,temperature

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Linkages of flow regime and micro-topography:prediction for non-native mangrove invasion under sea-level rise

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ecosystem Health and Sustainability 2020年第1期6卷 462-475,461页

作者： Luzhen Chen Hongyu Feng Xiaoxuan Gu Ying Dong Peng Cheng Xudong Guo Qiulian Lin Ting Tang Yihui Zhang Xudong Zhu Shengchang Yang Key Laboratory of the Ministry of Education for coastal and Wetland ecosystem College of the Environment and EcologyXiamen UniversityXiamenFujianChina Zhangjiang Estuary Mangrove ecosystem Observation and Research Station of Fujian Province Zhangjiang Estuary Mangrove Ecosystem Observation and Research Station of Fujian ProvinceXiamen UniversityXiamenFujianChina State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamenFujianChina

Flow regime is a key driver of invasive aquatic organisms,and the invasiveness of mangrove species may be simultaneously attributed to plant traits and flowing hydrological conditions at the estuary *** focused on hydrological and topographic conditions for a non-native mangrove species,Sonneratia apetala,in Zhangjiang Estuary of Fujian,China.A hydrological model and a micro-topographic model were used to predict its dispersal and early establishment,and field surveys and simulated experiments were integrated to estimate its future dispersal *** mesohaline mudflat with a salinity of 8~10 PSU at the mangrove seaward edge was the most likely colonization area for *** under current *** south-western region of the estuary with native mangroves was the most likely area for its colonization according to the unstructured-grid finite-volume community ocean model(FVCOM)in September,when the largest tidal currents within a year and the maximum fruit maturity period *** 42%of the mudflats throughout the whole estuary may be available for seedling establishment under the future sea-level rise RCP 4.5 scenarios compared with 44%for current establishment;however,the RCP 8.5 scenarios would significantly decrease seedling establishment by 2100 due to serious tidal inundation according to the micro-topographical model.

关键词： Mangroves salinity elevation sea-level rise climatic change biological invasion

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Effects of different types of nutrient effluent from shrimp ponds on the seedling growth of Kandelia obovata

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Acta Oceanologica Sinica 2018年第6期37卷 112-120页

作者： TIAN Yuan CHEN Guangcheng TANG Feilong ZHENG Chunfang YE Yong Key Laboratory of the Ministry of Education for coastal and Wetland ecosystem College of the Environment and Ecology Xiamen University Xiamen 361102 China Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China Zhejiang Key Laboratory of Exploitation and Preservation of coastal Bio-resource Zhejiang Mariculture Research Institute Wenzhou 325005 China

Extensive shrimp ponds are located next to the landward edges of most of mangrove forests in China. A shrimp pond may influence mangroves by（1） routine effluent between pond and tide, and（2） dredging effluent from pond-dredging at least once a year. Our study consisted of two experiments to study the effects of these two effluents on the seedling growth of Kandelia obovata. One experiment simulated the effects of routine *** other simulated four sedimentation thicknesses（0 cm, 2 cm, 4 cm, 8 cm） over mangrove soils by dredging effluent from pond-dredging, and revealed the cumulative effects of dredging effluents on K. obovata. At each of the three fixed salinities, i.e., 5, 15 and 25, routine effluent did not result in significant differences in each of the measured growth parameters of K. obovata seedlings. However, effects of dredging effluent on seedling growth of K. obovata were related with sedimentation thickness. Most growth parameters showed maximum values at sedimentation thickness 4 cm. The data indicated that K. obovata accelerated its growth under moderate sedimentation thicknesses and it was tolerant and adaptable to shrimp pond-cleaning effluent sediments up to about 8 cm in our experiment.

关键词： routine effluent dredging effluent shrimp pond excessive nutrients biomass allocation mangroves

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Long-term nutrient variation trends and their potential impact on phytoplankton in the southern Yellow Sea,China

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Acta Oceanologica Sinica 2022年第6期41卷 54-67页

作者： Yan Wang Yongjian Liu Hao Guo Haibo Zhang Dongmei Li Ziwei Yao Xiaocheng Wang Chuan Jia State Environmental Protection Key Laboratory of coastal ecosystem National Marine Environmental Monitoring CenterDalian 116023China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China

The concentration and composition of nutrients,such as N,P,and Si,respond to biogeochemical processes and in turn,impact the phytoplanktons'community structure and primary *** this study,historical data was systematically analyzed to identify long-term variations in nutrient trends,red tide frequency,phytoplankton community abundance,and dominant species succession in the southern Yellow Sea(SYS).Results showed that N/P concentration ratios dramatically increased as a function of increasing dissolved inorganic nitrogen concentrations,and Si/N concentration ratios were generally larger than 1,indicating that N limitation morphed to P limitation and potentially to Si limitation,which impacted the phytoplankton ***,inter-annual trends over the past 50 years show that phytoplankton community abundance has been higher in spring and summer,relative to autumn and ***,with respect to red tide frequency,diatom abundance gradually decreased,while that of dinoflagellates gradually *** species succession showed that the phytoplankton community exhibited an evident tendency to transform from diatoms to *** research results clearly depict the presence of an important correlation between the phytoplankton community and nutrient structure in the SYS.

关键词： southern Yellow Sea nutrients structure succession of phytoplankton community diatom dinoflagellate

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RNA interference reveals chloride channel 7 gene helps short-term hypersalinity stress resistance in Hong Kong oyster Crassostrea hongkongensis

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Journal of Oceanology and Limnology 2024年第4期42卷 1261-1271页

作者： Yeshao PENG Ziao CHEN Qiong DENG Zhen JIA Lingxin KONG Peng ZHU Youhou XU Zhicai SHE Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation Pinglu Canal and Beibu Gulf Coastal Ecosystem Observation and Research Station of GuangxiCollege of Marine SciencesBeibu Gulf UniversityQinzhou 535011China

The chloride channel 7 gene(CLC 7)of the Hong Kong oyster Crassostrea hongkongensis was cloned and named ChCLC *** cDNA was 2572 bp in length,with a 5′non-coding region containing 25 bp,a 3′non-coding region containing 327 bp,and an open reading frame of 2298 *** 7 has 96.8%and 92.1%homology with CLC 7 of Crassostrea gigas and Crassostrea virginica,respectively,and it was clustered with CLC 7 of *** and ***-PCR showed that ChCLC 7 was expressed in all eight tissues,with the highest in adductor muscle and second in *** ChCLC 7 expression pattern in gill was altered significantly under high salinity stress with an overall upward and then downward *** RNA interference,the expression of ChCLC 7 and survival rate of oyster under high salinity stress was reduced significantly,and so did the concentration of hemolymph chloride ion in 48-96 h after RNA *** believed that ChCLC 7 could play an important role in osmoregulation of *** by regulating Cl^(-)*** study provided data for the analysis of molecular mechanism against oyster salinity stress.

关键词： Crassostrea hongkongensis chloride channel 7 salinity stress RNA interference

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Preliminary study on community structures of meiofauna in the middle and eastern Chukchi Sea

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Acta Oceanologica Sinica 2021年第6期40卷 83-91页

作者： Dingyong Huang Jianjia Wang Qianhui Zeng Jiaguang Xiao Peng Tian Sujing Fu Feng Guo Wentao Niu Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Ocean College Shandong UniversityWeihai 264209China Key Laboratory of the coastal and Wetland ecosystem of Ministry of Education Xiamen UniversityXiamen 361005China

Sediment core samples were collected from 17 stations in the middle and eastern Chukchi Sea during the sixth Chinese National Arctic Research Expedition(CHINARE-Arctic)in summer *** samples were analyzed for composition,abundance,biomass,vertical distribution,size spectra,and ecological indexes of meiofauna.A total of 14 meiofauna taxa were detected,and the free-living marine nematodes comprised the most dominant taxon,accounting for 97.21%of the average *** abundance and biomass of meiofauna were within ranges of(218.12±85.83)-(7239.38±1557.15)ind./(10 cm^(2))and(130.28±52.17)-(3309.56±1751.80)μg/(10 cm^(2)),with average values of(2391.90±1966.19)ind./(10 cm^(2))and(1549.73±2042.85)μg/(10 cm^(2))(according to dry weight)***,91.26%of the individuals were distributed in the top layer of 0-5 cm of surface sediment,and 90.84%had sizes of 32-250μ*** diversity index of meiofauna in the survey area was low,and the variation of abundance was the main difference in meiofauna communities among all *** and biomass of meiofauna were not significantly correlated with environmental factors except concentration of nutrient Si in bottom *** of meiofauna in shallow water of marginal seas in the Pacific sector of the Arctic Ocean is likely at a same level and higher than that in most of China sea areas,suggesting that the shallow water of the summer Chukchi Sea is a continental shelf area with rich resources of *** Chukchi Sea is important for studying the ecosystem of the Arctic Ocean and environmental ***,studies on meiofauna in the Chukchi Sea are still not enough,and in the future,natural and human disturbances may increase due to global warming,the Arctic channel opening,and other ***,more studies on meiofauna should be required,in order to know more about how the Arctic benthic community would alter.

关键词： Arctic Ocean Chukchi Sea meiofauna community structure abundance

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