浙南海域的赤潮生物   总被引：1，自引：0，他引：1  

姚炜民  李超  郜钧璋 《海洋通报》2006,25(3):87-91

利用2002—2004年浙南海域浮游植物的多次调查资料,对发生在浙南海域常见的赤潮生物进行分析整理,为赤潮的常规监测和应急监测提供背景资料。共检测到47种赤潮生物,其中有8种曾发生过赤潮,浙南海域主要的赤潮生物有具齿原甲藻Prorocentrumdentatum、微小原甲藻Prorocentrummininum、米金裸甲藻Gymnodiniummikimotoi、夜光藻Noctilucascintillans、长耳盒形藻Biddulphiaaurita等。此外,布氏双尾藻Ditylumbrightwellii、圆海链藻Thalassiosirarotula、掌状冠盖藻Stephanopyxispalmeriana、小等刺硅鞭藻DictyochafibulafibulaEhrenberg以及一些角藻属种类等赤潮生物也存在潜在威胁。  相似文献   

聚苯乙烯微塑料对东海原甲藻生长的影响          下载免费PDF全文

孙炎  刘千龙  罗肇河  康建华  孙秀武  张元标  林辉  潘钟 《应用海洋学学报》2021,40(4):636-642

微塑料是海洋中的一种污染物,近年来已成为全球关注的热点环境问题。东海原甲藻（Prorocentrum donghaiense）是我国东海海域常见的有害赤潮藻,目前尚未有关于微塑料污染对东海原甲藻影响研究的报道。为了探讨聚苯乙烯（PS）微塑料对东海原甲藻生长的影响机制,阐明海洋微塑料对东海原甲藻生长的影响,本研究开展了东海原甲藻在聚苯乙烯微塑料差异化暴露条件下的生长动力学室内模拟实验。结果显示：①5 mg/L溶解性有机质（DOM）可促进东海原甲藻的生长;②10 mg/L（0.1 μm粒径）的聚苯乙烯微塑料对东海原甲藻前期生长的影响,表现为先抑制、后促进;③聚苯乙烯微塑料会抑制处于稳定期和衰退期东海原甲藻的生长;微塑料粒径越小、浓度越高抑制作用越强;浓度的抑制效应强于粒径的。我们研究发现聚苯乙烯微塑料会影响东海原甲藻的生长,这将为微塑料和赤潮藻复合污染生态效应以及海洋生态系统保护提供新的科学依据。  相似文献   

Some observations of the feeding habits of a Weddell seal,and measurements of its prey,Dissostichus mawsoni,at McMurdo Sound,Antarctica     

I. Calhaem  D. A. Christoffel 《新西兰海洋与淡水研究杂志》2013,47(2):181-190

During December 1966, observations were made on the hunting and feeding habits of an individual Weddell seal (Leptonychotes weddelli Lesson) at a fishing hole in the ice above a depth of 300 m of water, near McMurdo Station. The seal appeared regularly every day, usually within 10 minutes of 1800 hours, and started feeding, sometimes for as long as 8 hours. The prey fish, once caught, was killed and eaten underwater, with the seal frequently surfacing to breathe. The fish caught varied in weight between 15 and 65 1b, and were all the same species, identified as Dissostichus mawsoni Norman.

The average daily weight of the seal's catch was estimated to be about 150 lb.  相似文献   

Size-fractionated phytoplankton biomass in autumn of the Changjiang （Yangtze） River Estuary and its adjacent waters after the Three Gorges Dam construction   总被引：3，自引：0，他引：3  

宋书群  孙军  栾青杉  沈志良 《中国海洋湖沼学报》2008,26(3):268-275

A cruise was undertaken from 3rd to 8th November 2004 in Changjiang （Yangtze） River Estuary and its adjacent waters to investigate the spatial biomass distribution and size composition of phytoplankton. Chlorophyll-a （Chl-a） concentration ranged 0.42-1.17 μg L^-1 and 0.41-10.43 μg L^-1 inside and outside the river mouth, with the mean value 0.73 μg L^-1 and 1.86 μg L^-1, respectively. Compared with the Chl-a concentration in summer of 2004, the mean value was much lower inside, and a little higher outside the river mouth. The maximal Chl-a was 10.43 μg L^-1 at station 18 （122.67°E, 31.25°N）, and the region of high Chl-a concentration was observed in the central survey area between 122.5°E and 123.0°E. In the stations located east of 122.5°E, Chl-a concentration was generally high in the upper layers above 5 m due to water stratification. In the survey area, the average Chl-a in sizes of 〉20 μm and 〈20 μm was 0.28 μg L^-1 and 1.40 μg L^-1, respectively. High Chl-a concentration of 〈20 μm size-fraction indicated that the nanophytoplankton and picophytoplankton contributed the most to the biomass of phytoplankton. Skeletonema costatum, Prorocentrum micans and Scrippsiella trochoidea were the dominant species in surface water. The spatial distribution of cell abundance of phytoplankton was patchy and did not agree well with that of Chl-a, as the cell abundance could not distinguish the differences in shape and size of phytoplankton cells. Nitrate and silicate behaved conservatively, but the former could probably be the limitation factor to algal biomass at offshore stations. The distribution of phosphate scattered considerably, and its relation to the phytoplankton biomass was complicated.  相似文献   

Effects of NO and Different Media on the Growth of Prorocentrum micans     

ZHANG Zhengbin*  LI Peifeng  and LIU Chunying Institute of Marine Chemistry  Ocean University of China  Qingdao  P.R.China 《中国海洋大学学报(英文版)》2006,5(3):239-242

1Introduction NOisadiffusible,gaseousfreeradicalthatplaysimportantrolesinanimalsandplants.Itfunctionsin diseaseresistance,abioticstress,celldeath,respira tion,senescence,rootdevelopments,germinationandhormoneresponses.Itisanunusualsignalinthatitis areactive,lipophilicandvolatilefreeradicalthatcanbecytotoxic.ThewidespreadbiologicalsignificanceofnitricoxidewasrecognizedbySciencein1992whichnamedthefreeradicalNO‘Moleculeoftheyear’,andin1998theNobelPrizeinPhysiologyandMedicinewasawardedforwor…  相似文献   

Acute Toxicity of Formalin to the Red-tide Dinoflageilate Prorocentrum minimum Schiller （Protozoa, Mastigophora）     

XUHenglong SONGWeibo ZHUMingzhuang QIUYantao MAHonggang 《中国海洋大学学报(英文版)》2005,4(1):89-92

The acute toxic levels of formalin to a marine red-tide dinoflagellate Prorocentrum minimum Schiller (Mastigophora, Dinoflagellida) were determined by linear regression analysis. The data obtained revealed that there is a close regression relationship between logarithmic concentrations of formalin and mortality probit scales of the organism when exposure times are 1, 2, 6, 12, 24 h. The median lethal concentrations (LC50 values) obtained from correlation analysis for these exposure times (with 95% confidence intervals), were 11.83, 6.76, 4.37, 4.27 and 3.98mgL^-1 respectively. A toxicity curve was obtained to connect the exposure time and LC50 value from the correlation between them. The results indicated that P. minimum could be killed or fixed by formalin in the concentration range of 4-12mgL^-1 within 1-24h.  相似文献   

Molecular identification of Prorocentrum （Dinophyceae） species     

张诚韩笑天  邹景忠俞志明  宋秀贤ChristianSchuett 《中国海洋湖沼学报》2005,23(3):317-322

A fragment of a large sub-unit ribosomal DNA (LrDNA) of 12 strains of Prorocentrum species was amplified by polymerase chain reaction (PCR). The PCR products were digested by 3 restriction endonucleases (Cfo Ⅰ, Hae Ⅲ, and RSA Ⅰ) and then resolved in agarose gels. Results show that different species had different RFLP patterns, except for P arcuatum (ME 131), which had the same pattern to P. micans (ME 160 and 04).The same fragment of 19 strains of the genus was also amplified and subjected to denaturing gradient gel electrophoresis (DGGE). 11 different patterns were resolved. Different cultures of a same species had the same pattern. The results of RFLP and DGGE analyses showed that eight newly isolated epibenthic Prorocentrum species were different from each other, and also from other cultured ones examined in this study. P arcuatum(MEI32) could not be differentiated from P. micans (MEI60 and 04), it was probably mis-identified, since they are quite different morphologically. P. redfieldii (MEI38) could also not be distinguished form P. triestinium(MEI32), it should be regarded as a synonym ofP. triestinium. Unexpectedly, a restriction site was found in P.micans, compared with previous sequence data.  相似文献   

THE EFFECTS OF NITROGEN,PHOSPHORUS,VITAMINS AND TRACE METALS ON THE GROWTH OF THE RED TIDE ORGANISM PROROCENTRUM MICANS   总被引：3，自引：0，他引：3  

王正方  张庆  龚敏 《中国海洋湖沼学报》1995,(4)

Laboratory culture experiments showed that < 100μmol/L nitrate, amonium or mixture of aminoacids promote the growth of the red tide organism Prorocentrum micans Ehrenb, but that >100μmol/Lof ammonium, or mixture of glycine and glutamate was harmful to growth, and that orthophosphatewas P. micrns’main phosphorous soruce in the ocean. Presence of 80μmol/L EDTA, 0.5 to 1μmol/LFe~(3+), 1.0 to 20.0 μmol/L Mn~(2+) 0.1 to 0.4 μmol/L Co~(2+) in the culture medium could improvethe growth of P. micans. Vitamin B_1 promoted growth, but vitamin B_(12) and biotin did not. Theestimated minimum cell quotaS (q_ο) for nitrogen and phosphorus being 0.74 pmole/cell and 0.045pmole/cell show that phosphorus (more than nitrogen) limits the growth of P. micans in the study area.  相似文献   

Cloning,characterization, and expression of Cytochrome b (<Emphasis Type="Italic">Cytb</Emphasis>)—a key mitochondrial gene from <Emphasis Type="Italic">Prorocentrum donghaiense</Emphasis>     

赵丽媛  米铁柱  甄毓  于志刚 《中国海洋湖沼学报》2012,30(3):424-432

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The Inhibitory Degree Between Skeletonema costatum and Dinoflagllate Prorocentrum donghaiense at Different Con- centrations of Phosphate and Nitrate/Phosphate Ratios     

CAO Jing  WANG Jiangtao 《青岛海洋大学学报(英文版)》2012,(2):153-158

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