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红树林区硅藻丰度和生物量构成及与底栖动物的关系

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海洋环境科学 2001年第3期20卷 24-28页

作者：刘玉余日清陈桂珠中山大学环境科学研究所广东广州510275

对深圳福田红树林湿地中百亩区、上沙、下沙、沙嘴、观鸟亭等 5个亚区中的硅藻种类、丰度和生物量等进行了研究。结果显示 ,5区中硅藻门藻类在种类及丰度组成上均为优势类群。硅藻总生物量以观鸟亭最高 ,达 2 5 .0 76mg/L ,下沙 8.44 6m... 详细信息

对深圳福田红树林湿地中百亩区、上沙、下沙、沙嘴、观鸟亭等 5个亚区中的硅藻种类、丰度和生物量等进行了研究。结果显示 ,5区中硅藻门藻类在种类及丰度组成上均为优势类群。硅藻总生物量以观鸟亭最高 ,达 2 5 .0 76mg/L ,下沙 8.44 6mg/L ,百亩区 4.488mg/L ,沙嘴 2 .111mg/L ,上沙仅为 0 .742mg/L。最高与最低硅藻总生物量相差可达 38倍。生物量分布趋势和其丰度分布相似 ,相关系数为 0 .998,但每一单种硅藻生物量之间存在着较大差异。

关键词：红树林硅藻丰度生物量底栖动物构成关系植物动物生物监测

硅藻与色素在古环境演化研究中的意义——以固城湖为例

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湖泊科学 1996年第1期8卷 16-26页

作者：马燕王苏民潘红玺中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室南京210008

根据固城湖GS_1孔沉积物中硅藻的丰度与组合、色素的含量与有关参数,并结合孢粉、有机碳等分析数据,较详细地讨论了从晚冰期到全新世中期(15.3～6.0ka B.P.)固城湖地区古气候古环境演化的过程。同时尝试把硅藻与色素的结合作为度量湖泊... 详细信息

根据固城湖GS_1孔沉积物中硅藻的丰度与组合、色素的含量与有关参数,并结合孢粉、有机碳等分析数据,较详细地讨论了从晚冰期到全新世中期(15.3～6.0ka B.P.)固城湖地区古气候古环境演化的过程。同时尝试把硅藻与色素的结合作为度量湖泊古初始生产力的有效性,以及识别沉积记录有关人类活动的可能性。文中还专门论述了全新世初期海相硅藻出现的层位特点与背景,并与太湖作了比较,这一现象对重新认识长江三角洲地区的古地理环境无疑是十分重要的。

关键词：硅藻丰度色素环境演化固城湖古环境湖泊

Nano-and microphytoplankton community characteristics in brown tide bloom-prone waters of the Qinhuangdao coast,Bohai Sea, China

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Science China Earth Sciences 2017年第6期60卷 1189-1200页

作者： XU Xin YU ZhiMing HE LiYan CHENG FangJin CAO XiHua SONG XiuXian Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China

Since 2009, the newly recorded species Aureococcus anophagefferens has successively induced brown tides in the Qinhuangdao coastal waters of the Bohai Sea. Here, we focus on the phytoplankton community structure in this region and try to point out the biological background characteristics of the outbreaks of successive brown tides. We analyzed species composition,cell abundance, diversity indices and size-fractionated chlorophyll a(Chl-a) concentration monthly from March 2013 to January2014. The phytoplankton community, as observed by microscopy, underwent succession from nano-celled chained diatoms to dinoflagellates in the spring and summer, and then to micro-celled diatoms and nano-celled chained diatoms as the most prominent groups in the subsequent autumn and winter. Canonical correspondence analysis revealed that changes in the abundance of diatoms were related to nutrient availability, especially of nitrogen, while water temperature was the crucial factor influencing the abundance of dinoflagellates and A. anophagefferens. Considering the contribution of nano-celled chained species to the micro-sized Chl-a,small phytoplankton(<20 μm) composed the majority of total Chl-a and were generally abundant during our study. Abundant and diverse small phytoplankton seemed to serve as a background or seedbank for the formation of blooms of A. anophagefferens and other small-celled algae.

关键词：秦皇岛海域植物群落特征水域浮游植物群落硅藻丰度叶绿素a 海岸赤潮

Effect of hydrological variability on diatom distribution in Poyang Lake, China

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Chinese Journal of Oceanology and Limnology 2017年第1期35卷 174-184页

作者：钱奎梅刘霞陈宇炜 Poyang Lake Laboratory for Wetland Ecosystem Research State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences College of Environmental Engineering Xuzhou Institute of Technology

Poyang Lake is the largest freshwater lake in China, and it has a seasonal flooding cycle that significantly changes the water level every year. The aim of this paper was to explain how these hydrological changes influence diatom populations in Poyang Lake. The yearly hydrological cycle can be divided into 4 phases: low water-level phase, increasing water-level phase, high water-level phase and decreasing waterlevel phase. Variations in the abundance of planktonic diatoms were studied using quarterly monitoring data collected from January 2009 to October 2013. Generally, diatoms were dominant in Poyang Lake and accounted for more than 50% of the total phytoplankton biomass except in July 2009(26%) and January 2012(35%). Aulacoseira granulata and Surirella robusta were the predominant species in all four phases, and they accounted for 25.02% to 56.89% and 5.07% to 14.78% of the total phytoplankton biomass, respectively. A redundancy analysis(RDA) showed that changes in physico-chemical parameter were related to the water level, and changes in diatom biomass were related to nitrite levels and p H. These results indicate that changes in environmental parameters related to both seasonal variations and water-level fluctuations caused variations in diatom biomass and community composition in Poyang Lake. Furthermore, extreme hydrological events can have different influences on the diatom community composition in the main channel and lentic regions. This research provides data on the diatom variations in Poyang Lake and will be useful for establishing biological indicators of environmental change and protecting Poyang Lake in the future.

关键词：硅藻丰度水文变化鄱阳湖浮游植物生物量中国季节性变化变异低水位期

Environmental change and its effects on inter-decadal variations of diatom production, species composition and frustule dissolution in a coastal marginal sea

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Chinese Journal of Oceanology and Limnology 2017年第6期35卷 1362-1373页

作者： Rediat ABATE 高亚辉陈长平梁君荣陈蔚芳孙琳 Demeke KIFILE School of Life Sciences Xiamen University College of Natural Science Arba Minch University State Key Laboratory of Marine Environmental Science Xiamen University Department of Zoological Sciences Addis Ababa University

The implications of climate change during the second half of the 20 th century have been reported throughout the world. Although marginal seas are sensitive to climate change and anthropogenic impacts, relatively little attention has been given to the South East Asian marginal seas. Thus, to bridge this gap in knowledge, a sediment core was collected from the coastal areas of the Leizhou Peninsula in the South China Sea(SCS) to study the inter-decadal climate change and its consequences using diatom species composition as a proxy record. Diatom absolute abundance varied from 2 300 to 68 000 and averaged 16 000 valves per gram of dry weight(v/gdw). The fractional dissolution index(Fi) was usually below 0.5, which indicates low to moderate preservation of diatom valves at coastal area of the SCS. At the inter-decadal time scale, total diatom abundance was high for the period after 1972, which coincided with 1) increased percentage of planktonic diatom abundance and Fi; 2) emergence and dominance of high productivity indicative cosmopolitan species such as T halassionema nitzschioides and Paralia sulcata(their relative abundance increased from 7% for the period before and after 1972, respectively); 3) decreased relative abundance of the small-sized eutrophication indicative species, C yclotella striata, from 70% to 40%. This study reveals that variations in the abundance of diatoms preserved in the sediment was a function of both production and dissolution/preservation of diatom valves, which in turn was intimately connected to the prevailing environmental/climatic conditions. In conclusion, these data reveal the existence of substantial changes in the coastal SCS in response to the 1970 s climate shift that was recorded in dif ferent parts of the world.

关键词：年代际变化硅藻丰度细胞溶解高生产率物种组成环境气候变化海藻

Diatom assemblages in surface sediments from the South China Sea as environmental indicators

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Chinese Journal of Oceanology and Limnology 2013年第1期31卷 31-45页

作者：吴瑞高亚辉方琦陈长平兰彬斌孙琳蓝东兆 School of Life Sciences Xiamen University Hainan Provincial Marine Development Plan and Design Research Institute State Key Laboratory of Marine Environmental Science Xiamen University Third Institute of Oceanography SOA

We studied diatom distribution from 62 samples from the uppermost 1 cm of sediment in the South China Sea (SCS), using grabs or box corers in three cruises between 2001-2007. Fifty six genera, 256 species and their varieties were identified. Dominating species included Coscinodiscus africanus, Coscinodiscus nodulifer, Cyclotella stylorum, Hemidiscus cuneiformis, Melosira sulcata, Nitzschia marina, Roperia tesselata, Thalassionema nitzschioides, Thalassiosira excentrica, and Thalassiothrix longissima. Most surface sediments in the SCS were rich in diatoms, except for a few coarse samples. Average diatom abundance in the study area was 104 607 valve/g. In terms of the abundance, ecology, and spatial distribution, seven diatom zones (Zones 1-7) were recognized. Zone 1 (northern continental shelf) is affected by warm currents, SCS northern branch of the Kuroshio, and northern coastal currents; Zone 2 (northwestern continental shelf) is affected by intense coastal currents; Zone 3 (Xisha Islands sea area) is a bathyal environment with transitional water masses; Zone 4 (sea basin) is a bathyal-to-deep sea with stable and uniform central water masses in a semi-enclosed marginal sea; Zone 5 (Nansha Islands marine area) is a pelagic environment with relatively high surface temperature; Zone 6 (northern Sunda Shelf) is a tropical shelf environment; and Zone 7 (northern Kalimantan Island shelf area) is affected by warm waters from the Indian Ocean and coastal waters. The data indicate that these diatom zones are closely related to topography, hydrodynamics, temperature, nutrients and especially the salinity. Better understanding of the relationship between diatom distribution and the oceanographic factors would help in the reconstruction of the SCS in the past.

关键词：硅藻组合表层沉积物中国南海环境指标海洋保护区深海环境硅藻丰度群岛海域

Diatom diet selectivity by early post-larval abalone Haliotis diversicolor supertexta under hatchery conditions

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Chinese Journal of Oceanology and Limnology 2010年第6期28卷 1187-1194页

作者：张玉宇高亚辉梁君荣陈长平赵东海李雪松李扬吴文忠 Key Laboratory of Ministry of Education for Coast and Wetland Ecosystems and School of Life Sciences Xiamen University Dongshan Entry-Exit Inspection and Quarantine Bureau

Benthic diatoms constitute the primary diet of abalone during their early stages of development.To evaluate the dietary preferences of early post-larval abalone,Haliotis diversicolor supertexta,we analyzed the gut contents of post-larvae that settled on diatom films.We compared the abundance and species diversity of diatom assemblages in the gut to those of the epiphytic diatom assemblages on the attachment films,and identified 40 benthic diatom species in the gut contents of post-larvae 12 to 24 d after settlement.The most abundant taxa in the gut contents were Navicula spp.,Amphora copulate,and Amphora coffeaeformis.Navicula spp.accounted for 64.0% of the cell density.In the attachment films,we identified 110 diatom species belonging to 38 genera.Pennate diatoms were the dominant members including the species Amphiprora alata,Cocconeis placentula var.euglypta,Cylindrotheca closterium,Navicula sp.2,and A.coffeaeformis.Nano-diatoms(<20 μm in length) accounted for a considerable proportion of the total species number and cell density of the diatom assemblages in the gut contents and on the films.This suggests that nano-diatoms are important to the efficient production of abalone seed.The difference of the composition and abundance of diatoms between in the guts and on the biofilms suggests that early post-larval grazing was selective.An early post-larval abalone preferred nano-diatoms and the genera Navicula and Amphora during the month after settlement.

关键词：底栖硅藻早期阶段饮食偏好九孔鲍幼虫孵化条件物种多样性硅藻丰度

Diatom distribution as an environmental indicator in surface sediments of the West Philippine Basin

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Chinese Journal of Oceanology and Limnology 2017年第2期35卷 431-443页

作者：沈林南陈敏兰彬斌戚洪帅张爱梅蓝东兆方琦 College of Ocean andEarth Sciences Xiamen University Xiamen 361102 China Geology Laboratory of Marine and Coastal Environment Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

The distribution of diatoms from surface sediments of the West Philippine Basin was analyzed,with 68 species and varieties of diatoms from 26 genera identified.Diatom abundance varied spatially,with the absolute abundance of diatoms ranging from 0 to 3.4×10~4 frustules/g.The seven tropical pelagic diatoms were Alveus marinus,Azpeitia africana,Azpeitia nodulifera,Hemidiscus cuneiformis,Hemidiscus cuneiformis var.ventricosus,Roperia tesselata and Rhizosolenia bergonii.The relative abundance of these species was greater than 20%,and their distribution pattern in the sediments was overlaid by the flow of the Kuroshio Current.Ethmodiscus rex was present at 159 stations,formed the most abundant and dominant species in the diatomaceous ooze,and thus referred to as Ethmodiscus ooze.Ethmodiscus rex was also a major contributor to primary production in the region.A principal component analysis was employed to explain the relationship between samples and variations in diatom species from the WPB.Four diatom assemblages were distinguished,representing different oceanographic conditions;their spatial distributions were closely related with the North Equatorial Current and Kuroshio Current patterns in the region.These diatom assemblages can therefore be useful in deciphering late Quaternary palaeoceanographic reconstructions of the West Philippine Basin.

关键词：表层沉积物硅藻丰度菲律宾海盆特征硅藻组合空间分布主成分分析

Long-term ecological interactions between nutrient and phytoplankton community in the Changjiang estuary

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Chinese Journal of Oceanology and Limnology 2010年第4期28卷 887-898页

作者：江涛俞志明宋秀贤曹西华袁涌铨 Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of Sciences Graduate University of the Chinese Academy of Sciences

Both nitrate((NO_3)^-) and soluble reactive phosphate((PO_4)^(3-)) concentration in the freshwater end-member at the mouth of the Changjiang River have increased dramatically since the 1960s.Within the same period in the sea area,with surface salinity>30,(NO_3)^-concentration has shown an obvious increase,(PO_4)^(3-) has not changed greatly and dissolved reactive silica((SiO_3)^(2-)) has deceased dramatically.An examination of the elemental ratio of(NO_3)^-to(PO_4)^(3-) at the mouth of the Changjiang River did not show a systematic trend from the 1960s to 2000s largely because both nutrients increased simultaneously.In comparison,the elemental ratio of dissolved inorganic nitrogen(DIN) to(PO_4)^(3-) in surface seawater,with salinity>22,has shown a clearly increasing trend.Furthermore,an overall historical change of the(SiO_3)^(2-):(PO_4)^(3-) ratio has undergone a reverse trend in this area.Based on the changes of(SiO_3)^(2-):(PO_4)^(3-) and DIN:(PO_4)^(3-) ratios,we can conclude that an overall historical change of(SiO_3)^(2-):DIN ratio has decreased in this area from the 1950-1960s to 2000s.The argument that phytoplankton productivity in the Changjiang estuary has been enhanced by increasing nutrient input from the riverine transport was supported by these results.A comparative study analyzing the shift of phytoplankton composition from the mid-1980s to 2000s was also made.The results indicated that the average yearly percentage of diatom species in the Changjiang estuary has decreased from 84.6% during 1985-1986 to 69.8% during 2004-2005.Furthermore,the average yearly percentage of diatom abundance in the Changjiang estuary decreased from 99.5% during to 75.5% over the same time period,while the abundance of dinoflagellates has increased dramatically,from 0.7% to 25.4%.

关键词：浮游植物群落长江河口养分投入相互作用生态硅藻丰度海水盐度历史变迁