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Community structure and spatial-temporal variation of netzphytoplankton in the Bering Sea in summer

Acta Oceanologica Sinica 2016年第4期35卷 99-107页

作者： WANG Yu XIANG Peng YE Youyin lin Gengming YANG Qingliang lin heshan lin Mao Laboratory of Marine Biology and Ecology Third Institute of OceanographyState Oceanic Administration

Marine biodiversity is changing in response to altered physical environment, subsequent ecological changes as well as anthropogenic disturbances. In this study, phytoplankton samples in situ collected in the Bering Sea in July of 1999 and 2010 were analyzed to obtain phytoplankton community structure and spatial-temporal variation between the beginning and end of this decade, and the correlation of phytoplankton community dynamics and environmental factors was investigated. A total of 5 divisions, 58 genera and 153 species of phytoplankton belonging to 3 ecological groups were identified. The vast majority of phytoplankton consisted of diatoms accounting for 66.7% of the total species and 95.2% of the total abundance. Considering differentiation in spatial extent and phytoplankton sample types, there were subtle changes in species composition, large altering in abundance and significant variation in spatial distribution between two surveys. The abundance peak area was located at the Bering Strait while sub peak was found at the Bering Sea Basin. The boreal-temperate diatom was the dominant flora, which was subsequently replaced by eurythermal and frigid-water diatom. Phytoplankton community in the Bering Sea was not a simplex uniform community but composed of deep-ocean assemblage and neritic assemblage. The deep-ocean assemblage was located in the northwestern Pacific Ocean and Bering Sea Basin, dominated by boreal-temperate species（Neodenticula seminae, Thalassiothrix longissima, Amphiprora hyperborean, Chaetoceros atlanticus, Thalassiosira trifulta, etc.） and eurychoric species（Thalassionema nitzschioides, Ch. compressus, Rhizosolenia styliformis, etc.）, and characterized by low abundance, even interspecies abundance allocations, diverse dominant species and high species diversity. The neritic assemblage was distributed on the continental shelf and slope of Bering Sea and was mainly composed of frigid-water species（***？ldii, Ch. furcellatus, Ch. socialis

关键词： Bering Sea phytoplankton community structure spatial and temporal variation distribution environment changes

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Comprehensive Investigation and Assessment of Nutrient and Heavy Metal Contamination in the Surface Water of Coastal Bohai Sea in China

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Journal of Ocean University of China 2020年第4期19卷 843-852页

作者： lin heshan LI Hongjun YANG Xiaolong XU Zizhou TONG Yindong YU Xingguang College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Marine Ecology Department National Marine Environmental Monitoring CenterDalian 116023China School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China

With the rapid development of industrialization and urbanization of coastal regions,eutrophication and metal pollution have caused serious environmental problems in *** better understand the potential environmental risks associated with nutrients and heavy metals,the surface water was comprehensively investigated in the coastal Bohai Sea.A total of 150 sites were sampled from seven coastal regions,and the concentrations of nutrients(DIN and DIP)and metals(Cd,Pb,Zn,Cu,Cr,As and Hg)in the surface seawater were *** results showed that the DIN concentration of about 50%sites exceeded the Grade-I of Seawater Quality Standard of *** to high concentrations of DIN,the status of eutrophication was serious in the Bohai Bay and Shuangtaizi *** to Seawater Quality Standard of China,Pb,Zn,Hg and Cu were the main metal pollutants in the coastal Bohai *** was generally low ecological risk caused by heavy metals,but certain hotspots existed near Shuangtaizi Estuary and Changxingdao Island.

关键词： Bohai Sea eutrophication heavy metal ecological risk assessment species sensitivity distribution

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Community structure and spatial distribution of macrobenthos in the shelf area of the Bering Sea

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Acta Oceanologica Sinica 2014年第6期33卷 74-81页

作者： WANG Jianjun HE Xuebao lin heshan lin Junhui HUANG Yaqin ZHENG Chengxing ZHENG Fengwu LI Rongguan JIANG Jinxiang Laboratory of Marine Biology and Ecology Third Institute of OceanographyState Oceanic Administration

Field investigations of marine macrobenthos were conducted at ten sites in the Bering Sea in July 2010. Altogether 90 species of macrobenthos belonging to 59 families and 78 genera were identified. Among them, 41 polychaetes, 16 mollusks, 23 crustaceans, three echinoderms, two cnidarians, one nemertean, one priapulid, two sipunculids, and one echiuran were identified. The average density and biomass of total macrobenthos were 984 ind./m2 and 1207.1 g/ma of wet weight, respectively. The predominant species in the study area were Scoloplos armiger, Eudorella pacifica, Ophiura sarsii, Heteromastus filiformis, Ennucula tenuis, and Harpiniopsis vadiculus by abundance, while the predominant species in this area was Echinarachnius parma by biomass. Hierarchical cluster analysis （Bray-Curtis similarity measure） revealed that two impor- tant benthic assemblages in the study area were CommunityA and Community B. CommunityA was stable and Community B was unstable, as shown by the Abundance/Biomass Comparisons （ABC） approach. The macrobenthic community structure in the shelf of the Bering Sea was characterized by its high abundance and biomass, high productivity but great heterogeneity.

关键词： Bering Sea marine macrobenthos community structure spatial distribution diversity

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Biodiversity and community structural characteristics of macrobenthos in the Chukchi Sea

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Acta Oceanologica Sinica 2014年第6期33卷 82-89页

作者： WANG Jianjun lin heshan HE Xuebao lin Junhui HUANG Yaqin LI Rongguan ZHENG Chengxing ZHENG Fengwu JIANG Jinxiang Laboratory of Marine Biology and Ecology Third Institute of OceanographyState Oceanic Administration

Field sampling of the macrobenthos from 23 stations in the Chukchi Sea was conducted during the 4th CHI- NARE （Chinese National Arctic Research Expeditions, July-August, 2010）. We identified a total of 140 species of macrozoobenthos belonging to nine phyla, which were dominated by polychaetes （66）, crustaceans （30）, and mollusks （25）, followed by echinoderms （9） and others （ten others, including four cnidarians, one oligochaete, one sipuncula, one priapulida, two bryozoans, and one urochordata）. The dominant species were Aphelochaeta pacifica, Heteromastus filiformis, Nephtys ciliata, Nephtys caeca, Scoletoma fragilis, Golfingia margaritacea, Nuculana pernula, Macoma calcarea, Ennucula tenuis, Macoma inquinata, Musculus discors, Echinarachnius parma, and Ophiura sarsii, so there were more cold-eurythermal boreal immigrants than trulyArctic species （endemics）. The average density and biomass （mean ± SD across all stations） of the total macrozoobenthos were （916 ± 907） ind/m2 and （902.9 ± 1227.7） g/m2 （wet weight）, respectively. Relatively high density and biomass were observed in the samples from the northeastern and southern Chukchi Sea. The spatial variation of benthic communities in the study sea area was relatively large; this spatial heteroge- neity has led to high diversity and a patchy distribution pattern in the community structure. Compared to the 1st CHINARE （July-August, 1999）, this investigation revealed different degrees of decreases in the average taxa numbers and the average density, abundance, and biodiversity in the area over the recent decade, which might be associated with global warming, human activities, and sea ice variations.

关键词： Chukchi Sea macrobenthos biodiversity community structure

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Macrobenthic communities on the continental shelf of the Prydz Bay, East Antarctica

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Acta Oceanologica Sinica 2020年第2期39卷 38-48页

作者： Kun Liu heshan lin Xuebao He Yaqin Huang Zhong Li Junhui lin Jianfeng Mou Shuyi Zhang Jianjun Wang Jun Sun College of Biotechnology Tianjin University of Science and TechnologyTianjin 300457China Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Fisheries College Jimei UniversityXiamen 361021China

To explore the spatial pattern of macrobenthic communities and their response to environmental factors in the Prydz Bay,samples were collected using a 0.25-m2 box corer at 10 stations from November 2012 to April 2013.A total of 50 species of macrobenthos belonging to 8 phyla and 33 families were identified,of which polychaetes(e.g.,Maldane sarsi)and sponges(e.g.,Halichondria *** Leucosolenia sp.)were the most prominent *** macrobenthos in study area were categorized into five functional groups based on the feeding type,and the detritivorous group represented by polychaetes showed the highest average abundance,while the planktophagous group represented by sponges showed the highest average *** abundance(0–592 ind./m2)and biomass(0–1155.5 g/m2)in the Prydz Bay were relatively lower than those of other Antarctic shelf soft-bottom waters,although the compositions of the dominant species and functional feeding groups were *** results of the Spearman rank correlation analysis indicated that the average biomass of the macrobenthos and the biomass of the planktophagous group in the study area were negatively correlated with the water depth,sediment grain size and silt ***,these variables were clearly not strong determinants of macrobenthos assemblage *** factors not measured in the study,e.g.,sediment organic matter and iceberg interference,have probably influenced the spatial distribution of macrobenthic community structure in the Prydz Bay.

关键词： macrobenthic communities functional feeding groups environmental factors Antarctica Prydz Bay

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Spatial pattern of macrobenthic communities along a shelf-slope-basin transect across the Bering Sea

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Acta Oceanologica Sinica 2018年第6期37卷 72-81页

作者： lin heshan LIU Kun WANG Jianjun HUANG Yaqin LI Zhong lin Junhui HE Xuebao ZHANG Shuyi MOU Jianfeng WANG Yu XING Bingpeng Laboratory of Marine Biology and Ecology Third Institute of Oceanography State Oceanic Administration College of Biotechnology Tianjin University of Science and Technology Fisheries College Jimei University

Due to its unique geological location, the Bering Sea is an ideal place to investigate the water exchange and ecosystem connectivity of the Pacific Ocean–Arctic Ocean and subarctic–Arctic region. Based on a number of summer surveys（July to September, 2010, 2012 and 2014）, macrobenthic communities and their spatial-temporal patterns are exhibited for the majority of the Bering Sea（53°59′–64°36′N）. The results show that the macrobenthic communities were dominated by northern cold-water species and immigrant eurythermic species, and the communities assumed a dispersed and patchy distribution pattern. Polychaetes（Scoloplos armiger）, crustaceans（Ceradocus capensis） and sea urchins（Echinarachnius parma） were the main dominant groups in the shallow shelves; the sea star（Ctenodiscus crispatus） and the brittle star（Ophiura sarsii） were the main dominant groups in the continental slope; whereas small polychaetes（Prionospio malmgreni） dominated the basin area. Sediment type, water depth, and currents were the major factors affecting the structure and spatial distribution of the macrobenthic communities. Compared with other seas, the shallow areas of the Bering Sea showed an extremely high-standing biomass. In particular, the northern shelf area（north of St. Lawrence Islands and west of 170°W）,which is primarily controlled by Anadyr Water, is an undersea oasis. In contrast, a deficiency in the downward transport of particulate organic carbon has resulted in a desert-like seabed in the basin area. By comparing our results to previous studies, we found that macrobenthic communities of the Bering Sea have undergone significant structural changes in recent decades, resulting in a decrease in abundance and an increase in *** addition, populations of amphipods and bivalves in the northern shelves have decreased significantly and have been gradually replaced by other species. These changes might be associated with advanced seasonal ice melting,changes in organic carbon input, a

关键词： macrobenthos community structure Arctic Bering Sea environmental drivers

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Fouling community characteristics in subtropical coastal waters of the southwestern East China Sea

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Acta Oceanologica Sinica 2017年第10期36卷 70-78页

作者： lin heshan WANG Jianjun LIU Wei LIU Kun ZHANG Shuyi HE Xuebao HUANG Yaqin lin Junhui MOU Jianfeng ZHENG Chengxing YAN Tao Laboratory of Marine Biology and Ecology Third Institute of Oceanography State Oceanic Administration Ning De Marine Environmental Monitoring Center CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of Sciences

A fouling study was conducted in coastal waters southwest of the East China Sea between December 2013 and November 2014. A total of 84 species of fouling organisms belonging to 69 genera, 49 families, and 10 phyla were recorded over the entire year. The community composition was dominated by coastal warm-water species belonging to typical subtropical inner bay communities. The prosperous stage of settlement lasted from April to September, and the adhesion strength of the fouling organisms was the highest in summer. Sessile suspension feeders constituted the main core of settlement for the fouling community. Amphibalanus reticulatus was the most dominant and representative species of fouling organism, and other dominant species included Caprella equilibra, Ectopleura crocea, Anthopleura nigrescens, Stylochus ijimai, Spirobranchus kraussii, Crassostrea angulata, Perna viridis, Jassa falcata, Stenothoe valida, Sphaerozius nitidus, and Biflustra grandicella. The individuals in the fouling community showed a mutual dependence or constraint relationship due to competition for settlement space and food, and they exhibited a particular spatiotemporal distribution in accordance with adaptation to environmental factors. Temperature was the most important environmental factor determining the geographic distribution of fouling organisms. The temperature characteristics of species essentially reflect the differences in the fouling community composition in various climate zones. The species number, settlement stage, and settlement rate of fouling organisms are closely related to water temperature. Local natural environmental conditions（salinity, water currents, light, etc.） as well as human activity（such as aquaculture production） are all important factors affecting the settlement of fouling organisms.

关键词： biofouling coastal waters East China Sea community structure

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Sand barrier morphological evolution based on time series remote sensing images:a case study of Anhaiao,Pingtan

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Acta Oceanologica Sinica 2020年第12期39卷 121-134页

作者： heshan lin Xingguang Yu Zhigang Yu Yikang Gao Jinyan Xu Aiping Feng Zhijun Liu Degang Jiang Fan Yu College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Island Research Center Ministry of Natural ResourcesPingtan 350400China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Ministry of Natural Resources Beijing 100812China

The morphological evolution of the sand barrier in the Anhaiao coastal zone of Pingtan from 1996 to 2018 was *** correction was used to refine the location of the coastline.A standard deviation ellipse method was applied to further analyze the movement of the barrier head with the axis and rotation angle.A natural neighbor interpolation(NNI)method was carried out to calculate the terrain of the intertidal area,and the erosion and deposition characteristics were illustrated based on the *** results showed that the northern part of the sand barrier facing the lagoon area was deposited over the whole studied period,while erosion has always occurred in the southern part of the sand barrier facing the open *** erosion and deposition were slightly different on both sides of the barrier head due to hydrodynamic *** middle sand barrier moved 102.60 m away from its original location in 1996,and the end of the barrier moved 65.45 *** head of the sand barrier continued moving 379 m to the ***,the preliminary morphological evolution of the sand barrier corresponding to the distance and direction of movement was detected.

关键词： sand barrier dynamic evolution movement reclamation

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An ecological survey of the abundance and diversity of benthic macrofauna in Indonesian multispecific seagrass beds

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Acta Oceanologica Sinica 2018年第6期37卷 82-89页

作者： lin Junhui HUANG Yaqin ARBI Ucu Yanu lin heshan AZKAB Muhammad Husni WANG Jianjun HE Xuebao MOU Jianfeng LIU Kun ZHANG Shuyi Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China Research Center for Oceanography Indonesian Institute of Sciences Jakarta 14430 Indonesia

Seagrasses are one of the most productive ecosystems in coastal areas and support a wide variety of associated fauna. The tropical Indo-Pacific region is considered to have the highest diversity of seagrass plant species and the largest distribution areas of seagrass, yet the seagrass macrofauna in this region are poorly understood. To help fill this gap in our knowledge, an ecological survey was conducted to describe the abundance and diversity of benthic macrofauna from tropical seagrass beds and to determine between-station variations within a transect and between-site variations in macrofaunal abundance, taxa richness and community structure. Benthic macrofaunal samples associated with seagrass beds were collected with a core sampler on the east coast of North Sulawesi in May 2014 and on the west coast in October 2015. A total of 149 species from 14 higher taxa was collected. The most species-rich groups were polychaetes（56 species, 26% of total individual numbers）, decapods（20 species, 9% of total numbers） and amphipods（18 species, 35% of total numbers）. Between-station variations within a transect displayed different patterns between the east coast and the west coast. On the east coast, there were marked variations in abundance between stations within a transect for the macrofauna and amphipod assemblages. Both taxa richness and abundance varied with station for the macrofauna and polychaete assemblages on the west coast, resulting from the heterogeneity of the substrate along a transect. One-way ANOSIM together with MDS ordination indicated that macrofaunal community structure in seagrasses differed significantly between the east coast and the west coast, corresponding with the division of seagrasses into two broad categories of habitats, i.e.,mangrove-seagrass-reef continuum and seagrass-reef continuum. Compared with other studies in tropical areas,the abundance and diversity of benthic macrofauna in the present study were moderate. The reason for the two ma

关键词： benthic macrofauna diversity abundance community structure seagrass bed North Sulawesi

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Advances in Chinese Arctic and subarctic research in marine biology and ecology with emphasis on the Pacific Arctic sector

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Advances in Polar Science 2017年第2期28卷 111-119页

作者： LI Hai lin Longshan SONG Puqing LI Yuan ZHANG Ran lin heshan lin Rongcheng HAO Qiang ZHANG Fang ZHANG Guangtao Third Institute of Oceanography State Oceanic Administration Second Institute of Oceanography State Oceanic Administration SOA Key Laboratory for Polar Science Polar Research Institute of China Institute of Oceanology Chinese Academy of Sciences

The Arctic is one of the most sensitive regions that respond through feedback to global climate changes. Climatic, hydrological and ecological changes in the Arctic are clear evidence of global warming. In 2012 and 2014, the 5th and 6th Chinese National Arctic Research Expeditions undertook studies in the Bering Sea, the Arctic Ocean （including the Chukchi Sea）, and the Norwegian Sea. These studies provided us with a better understanding of the marine biology and ecology in the Arctic and subarctic regions, particularly in the Pacific Arctic sector. Rapid changes observed in the Arctic environment include the shrinking of cold-water masses in the Bering Sea in the summer, and elevated water temperatures promoting phytoplankton blooms, leading to an increase in phytoplankton transferred to higher trophic levels. As a result, the transfer efficiency of organic matter toward the bottom weakened, leading to a reduction in benthic biomass. This is consistent with expectations that the overall carbon and energy flux will ultimately switch from the dominant mode of sea ice-algae-benthos to one of phytoplankton-zooplankton. Influenced by Pacific water inflow, fluvial runoff and melting sea ice, the Chukchi Sea exhibited different responses to various environmental changes. Interactions between water masses led to other interannual ecological shifts. With the increase in sea ice melt and sunlight in the central region of the Arctic Ocean, the relative abundance of heterotrophic bacteria is expected to increase, and play a vital role in the Arctic microbial loop.

关键词： Arctic region climate changes chlorophyll plankton benthos microbe food chain

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