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Tetrabromobisphenol A and hexabromocyclododecane in sediments from the Zhujiang(Pearl) River Estuary and South China Sea

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Acta Oceanologica Sinica 2024年第6期43卷 32-37页

作者： Chuyue Long Weiyan Yang Jiaxun Lu Yuanyue Cheng Ning Qiu Sen Du Li Zhang Shejun Chen Yuxin Sun Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety/Key Laboratory of Theoretical Chemistry of Environmental of Ministry of Education School of EnvironmentSouth China Normal UniversityGuangzhou 510006China South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China research center of harmful algae and Marine Biology Jinan UniversityGuangzhou 510632China University of Chinese Academy of Sciences Beijing 100049China Southern Marine Science and Engineering Guangdong Laboratory Guangzhou 511458China

Marine sediments collected from the Zhujiang(Pearl) River Estuary(ZRE) and South China Sea(SCS) were utilized to study the occurrence and spatial distribution of tetrabromobisphenol A(TBBPA) and hexabromocyclododecane(HBCDD).The levels of TBBPA and HBCDD in sediments ranged from not detected(nd) to 6.14 ng/g dry weight(dw) and nd to 0.42 ng/g *** concentrations in marine sediments were substantially higher than *** concentrations of TBBPA and HBCDD in the ZRE sediments were significantly greater than those in the SCS.α-HBCDD(48.7%) and γ-HBCDD(46.2%) were the two main diastereoisomers of HBCDD in sediments from the ZRE,with minor contribution of β-HBCDD(5.1%).HBCDD were only found in one sample from the northern *** enantiomeric fraction of α-HBCDD in sediments from the ZRE was obviously greater than 0.5,indicating an accumulation of(+)-α-*** enantiomers of HBCDD were not measured in sediments from the *** work highlighted the environmental behaviors of TBBPA and HBCDD in marine sediments.

关键词： tetrabromobisphenol A hexabromocyclododecane marine sediments Zhujiang River Estuary South China Sea

Macroalgal deep genomics illuminate multiple paths to aquatic,photosynthetic multicellularity

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Molecular Plant 2024年第5期17卷 747-771页

作者： David R.Nelson Alexandra Mystikou Ashish Jaiswal Cecilia Rad-Menendez Michael J.Preston Frederik De Boever Diana C.El Assal Sarah Daakour Michael W.Lomas Jean-Claude Twizere David H.Green William C.Ratcliff Kourosh Salehi-Ashtiani Division of Science and Math New York University Abu DhabiAbu DhabiUAE center for Genomics and Systems Biology(CGSB) New York University Abu DhabiAbu DhabiUAE Biotechnology research center Technology Innovation InstitutePO Box 9639Masdar CityAbu DhabiUAE Culture Collection of algae and Protozoa Scottish Association for Marine ScienceObanScotlandUK National center for Marine algae and Microbiota Bigelow Laboratory for Ocean SciencesEast BoothbayMEUSA Laboratory of Viral Interactomes GIGA InstituteUniversity of LiegeLiegeBelgium School of Biological Sciences Georgia Institute of TechnologyAtlantaGAUSA

Macroalgae are multicellular,aquatic autotrophs that play vital roles in global climate maintenance and have diverse applications in biotechnology and eco-engineering,which are directly linked to their multicellularity ***,their genomic diversity and the evolutionary mechanisms underlying multicellularity in these organisms remain *** this study,we sequenced 110 macroalgal genomes from diverse climates and phyla,and identified key genomic features that distinguish them from their microalgal *** for cell adhesion,extracellular matrix formation,cell polarity,transport,and cell differentiation distinguish macroalgae from microalgae across all three major phyla,constituting conserved and unique gene sets supporting multicellular *** genes show phylum-and climate-specific expansions that may facilitate niche ***,our study reveals genetic determinants of convergent and divergent evolutionary trajectories that have shaped morphological diversity in macroalgae and provides genome-wide frameworks to understand photosynthetic multicellular evolution in aquatic environments.

关键词： macroalgae multicellularity comparative genomics evolution adhesome endogenous viral elements

Negative effects of Phaeocystis globosa on microalgae

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Chinese Journal of Oceanology and Limnology 2010年第4期28卷 911-916页

作者：刘洁生 VAN RIJSSEL Marion 杨维东彭喜春吕颂辉王艳陈菊芳王朝晖齐雨藻 College of Life Sciences and Technology Jinan University Department of Marine Biology University of Groningen research center for harmful algae and aquatic environments Jinan University

The potential allelopathic effects of the microalga,Phaeocystis globosa Scherffel,on three harmful bloom algae,Prorocentrum donghaiense Lu,Chattonella marina(Subrahmanyan) Hara et Chihara and Chattonella ovata Hara et Chihara were *** growth of *** and *** was markedly reduced when the organisms were co-cultured with *** or cultured in cell-free spent *** extracts from *** cells in the senescence phase had a similar inhibitory effect on the three harmful bloom ***,*** had less influence on the brine shrimp,Artemia *** results indicate that *** may have an allelopathic effect on microalgae,which would explain the superior competitive abilities of *** the addition of the haemolytic toxins from *** had similar effects on algae as spent media,these compounds may be involved in the allelopathic action of ***.

关键词： Phaeocystis globosa allelopathy haemolytic toxin

Phaeocystis globosa Scherffel,a harmful microalga,and its production of dimethylsulfoniopropionate

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Chinese Journal of Oceanology and Limnology 2011年第4期29卷 869-873页

作者：沈萍萍齐雨藻王艳黄良民 Key Laboratory of Marine-Bioresources Sustainable Utilization South China Sea Institute of Oceanology Chinese Academy of Sciences research center for harmful algae and aquatic Environment Jinan University

The production of dimethylsulfoniopropionate （DMSP） and its cleavage products （DMS） are well studied in phytoplankton worldwide. However, less is known about their sources, distributions, and impacts in the coast of China. We examined the production of DMSP and DMS in Phaeocvstis globosa Scherffel and other benthic macroalgae from the South China coast in relation to environmental conditions. P. globosa was a harmful marine microalgal species and its bloom took place in the eutrophic waters along the South China Sea frequently. It also produced high content of DMSP at different growth stages, with the highest concentration usually observed in the stationary period. Moreover, the production of DMSP in P. globosa was significantly affected by salinity and temperature with the highest contents associated with high salinity （e.g. 40） and low temperature （e.g. 20℃）. In field benthic macroalgae, there was also a marked difference in the DMSP of various species or different samples of the same species. Chlorophyll a contents were also determined for each macroalgal species. The highest chlorophyll a （238.7 ng/g fresh weight） was recorded in Chlorophyta Ulva lactuca at Guishan Island （Zhuhai）, while the lowest value （1.5 ng/g fresh weight） was found in Rhodophyta Gracilaria tenuistipitata in Zhanjiang. Further correlation analysis indicated that there was no significant relationship between the content of DMSP and chl-a in macroalgae samples （P〉 0.05）. All the results suggested that the production of DMSP in marine algae was not only species- and stage-related, but also greatly affected by various environmental factors.

关键词： Phaeocystis globosa DMSP DMS macroalgae South China coastal waters

Operando investigation of particle re-entrainment mechanism in electrostatic capture process on the lab-on-a-chip

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Journal of Environmental Sciences 2024年第2期136卷 337-347页

作者： Yong Zhu Yikun Zhang Xiaoyong Yang Shanlong Tao Mingxia Chen Wenfeng Shangguan research center for Combustion and Environmental Technology School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Inhalable particle is a harmful air pollutant that causes a significant threat to people's health and ecological environments,which should be removed to purify air,but there exists limited removal efficiency due to particle ***,Operando observation system based on microscopic visualization method is developed to make in situ test of particle migration,deposition and re-entrainment characteristics on a lab-on-a-chip to achieve the investigation in micro-level *** deposition evolution of charged particles is recorded in electric field region intuitively,which confirms the fracture of particle chain occurs during the growth process of deposited *** captures the instantaneous process that a larger particle with micron size due to the coagulation of submicron particles fractures from main body of the particle chain for the first *** analysis of migration behavior of a single submicron particle near electrode surface demonstrates the direct influence of drag force on the fracture of particle *** work is the first-time visualization of dynamic process and mechanism elucidation of particle re-entrainment at the micron level,and the findings will provide the theory support for the particle re-entrainment mechanism and bring inspires of enhancing capture efficiency of inhalable particle.

关键词： Inhalable particle Re-entrainment mechanism Operando observation Lab-on-a-chip Capture efficiency

Phosphorus forms and distribution in Zhejiang coastal sediment in the East China Sea

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International Journal of Sediment research 2014年第2期29卷 278-284页

作者： Min CONG Tao JIANG Yu-zao QI Hong-po DONG De-qiang TENG Song-hui LU research center for harmful algae and Marine Biology Jinan University Journal Editorial Department Jinan University Yellow Sea Fisheries research Institute Chinese Academy of Fishery Sciences research center for harmful algae and Marine Biology/Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes Jinan University Guangzhou Marine Geological Survey

Surface and core sediment samples were collected from Zhejiang coastal waters of the East China Sea to study phosphorus（P） forms and understand the potential release of P as well as *** sediments were extracted sequentially to determine four phosphorus fractions,and non-sequentially for total phosphorus（TP）.The total concentration of phosphorus in the surface sediments ranged from 527.2 to 680.5 mg kg;.Inorganic P was the major form and accounted for 84-94%of *** the four forms,P-Detrital was dominant（58.6-73.2%）,followed by P-CDB（10.5-20.9%）,P-Organic（6.1-15.9%）,and P-CFA（5.9-16.3%）.The distribution pattern of TP in the surface sediments was similar to that of P-Detrital and P-Organic,but different from P-CDB and P-CFA.A relatively high level of phosphorus was observed in estuarine sediments,reflecting the influence from terrestrial *** in all forms in core sediments at each station decreased with *** addition,potentially bio-available phosphorus accounted for 20-34%of TP.

关键词： Phosphorus forms Distribution Sediment Zhejiang coastal waters East China Sea

Nitrogen budget in the Changjiang River drainage area

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Chinese Journal of Oceanology and Limnology 2012年第4期30卷 654-667页

作者：江涛俞志明宋秀贤曹西华 research center for harmful algae and Marine Biology Jinan University Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of Sciences

We established a budget model of nitrogen （N） inputs and outputs between watersheds and waterbodies to determine the sources of riverine N in the Changjiang （Yangtze） River drainage area. Nitrogen inputs in the budget included N from synthetic fertilizer, biological fixation by leguminous and other crops, wet/dry atmospheric deposition, excreta from humans and animals, and crop residues. The total N input was estimated to be 17.6 Tg, of which 20% or 3.5 Tg N was transported into waterbodies. Of the total N transported into waterbodies, the largest proportion was N from animal waste （26%）, followed by N from atmospheric wet/dry deposition （25%）, synthetic fertilizer N （17%）, N in sewage wastes （17%）, N in human waste from rural areas （6%） and industrial wastewater N （9%）. We studied the spatial patterns of N inputs and outputs by dividing the Changjiang River drainage area into four sub-basins, from upstream to downstream： the Tongtian River drainage area （TTD, the headwater drainage area, 138 000 l^n2, less disturbed by human activities）; the Jinsha River drainage area （JSD, 347 000 km2, less disturbed by human activities, approx. 3 500 km upstream of the Changjiang estuary）; the Pingshan-Yichang drainage area （PYD, 520 500 krn2, large-scale human disturbance, about 2 000 km upstream of the Changjiang estuary）; and the Yichang-Datong drainage area （YDD, 699 900 km^2, large-scale httman disturbance, approx. 620 km upstream of the Changjiang estuary）. The average N input into waterbodies was 2.3, 7.3, 24.1, and 28.2 kg N/ha in the TTD, JSD, PYD, and YDD sub-basins, respectively, suggesting an increase of N-components of more than 10 times from upstream to downstream areas.

关键词： nitrogen budget eutrophication Changjiang (Yangtze) River drainage area riverine nitrogen transport

Spatial variability of summer and autumn phytoplankton community structure in Xiamen Western Bay based on pigment analysis

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Acta Oceanologica Sinica 2012年第5期31卷 165-175页

作者： HE Xuejia PENG Xingyue research center for harmful algae and Marine Biology Jinan UniversityGuangzhou 510632China School of Life Sciences Xiamen UniversityXiamen 361005China

The spatial variations of phytoplankton community structure in the Xiamen Western Bay during the summer and autumn cruises in 2001 were investigated based on HPLC analysis of photosynthetic pigments in algal cells and CHEMTAX processing of pigment data. The Chl a concentration reached 18.9 μg/L in the summer and declined to 0.28–2.17 in the autumn, respectively, consistent with the observation of diatom blooms in June. Among the accessory pigments, fucoxanthin was consistently the most abundant, ranging from 0.172 to 8.46 μg/L, with the maximum concentrations in June. 19’- hexfucoxanthin and alloxanthin were the other two abundant pigments in the summer and autumn. In addition, 19’-butanoyloxyfucoxanthin or peridinin was also important in late autumn. Generally the biomass of all the phytoplankton or each group was higher in the inner part than the mouth of this bay, represented by Chl a. CHEMTAX processing revealed the dominance of diatoms with their contribution of 14.6%–52.5% to the total Chl a, but its importance decreased in the autumn. Cryptophytes and Haptophytes, with an average contribution of 16.9%–31.4% and 12.1%–26.3%, were the other two important groups, especially in the autumn. On the contrary, Dinoflagellates and Chlorophytes were the minor groups, but the former became important sporadically in the autumn. It was suggested that there was distinctive variation in both the phytoplankton community structure and biomass between summer and autumn in the Xiamen Western Bay and the latter was coupled to the changes in temperature and dissolved oxygen. However, the spatial variation of the phytoplankton community structure was not as clear as the trend in the biomass of phytoplankton among all the sites in this bay.

关键词： phytoplankton pigment Xiamen Western Bay

Dinophysis caudata generated lipophilic shellfish toxins in bivalves from the Nanji Islands, East China Sea

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Chinese Journal of Oceanology and Limnology 2014年第1期32卷 130-139页

作者：江涛徐轶肖李扬齐雨藻江天久吴锋张帆 research center for harmful algae and Marine Biology Jinan University School of Geographical and Oceanographic Sciences Nanjing University College of Life Science South China Normal University

A 12-month program of monitoring potentially toxic microalgae(that produce lipophilic shellfi sh toxins; LSTs) and their toxins in bivalves was conducted from April 2006 to March 2007 in the Nanji Islands, East China Sea. Two Dinophysis species, D. caudata and D. acuminata, were identifi ed, and D. caudat a was found to be the dominant species. D. caudata was detected in water samples between April and June 2006, and between February and March 2007. It reached its highest abundances in May, with a mean abundance of 1.38×10 2 cells/L in surface water and 1.25×10 2 cells/L in bottom water(<10 m deep). The temporal distribution of D. caudata was associated with the occurrence of LSTs in bivalve samples, which mostly occurred at the same time as D. caudata blooms, between April and July 2006. All of the cultured bivalves sampled between April and June were contaminated with LSTs, with an average toxicity of 85 μg okadaic acid(OA) eq./100 g meat, which was four times higher than the Chinese regulatory limit(20 μg OA eq./100 g meat). Ten out of fi fteen wild samples(66.7%) collected during the same period were positive for LSTs, and contained an average LST toxicity of 45 μg OA eq./100 g meat(more than twice the regulatory value). Cultured Patinopecten yessoensis collected on 15 May 2006 had the highest toxicity, 320 μg OA eq./100 g meat, and relatively high toxicities(80 to 160 μg OA eq./100 g meat) were found in bivalves until the end of July.

关键词： Dinophysis lipophilic shellfish toxins D. caudate East China Sea Nanji Islands