Immunotoxicity Effect of Benzo[α]Pyrene on Scallop Chlamys f arreri     

ZHANG Lin  PAN Luqing  LIU Jing 《青岛海洋大学学报(英文版)》2009,(1):89-94

The toxic effects of benzo[α]pyrene （B[α]P） at different concentrations （0.1, 0.5, 1, 2.5 and 7.5 μgL^-1） on scallop （Chlamys farreri） immune system were studied. The results showed that B[α]P had significant toxic effects on the haemocyte counts, neutral red uptake, phagocytosis, bacteriolytic and antibacterial activity （P〈0.05）, while the seawater control and acetone control had no significant differences. The haemocyte counts, neutral red uptake, phagocytosis and bacteriolytic activity in all B[α]P treatment groups as well as antibacterial activity in groups of 0.5, 1, 2.5 and 7.5 μgL^-1·B[α]P decreased significantly （P〈0.05）. Some of these indices tended to be stable on the sixth day and others on the ninth day, and the indices showed clear time- and concentration-response to B[α]E Bactenolytic activity in 0.1 μgL^-1 B[α]P treatment group and antibacterial activity in 0.1 ggLl and 0.5 μgL^-1 B[α]P treatment groups increased at the beginning of exposure and reached their peaks on day 1 and day 6, respectively. Following that, both activities decreased gradually and became stable after day 9. When all the indices reached stability, they were significantly lower than those in control group （P〈0.05）, except for antibacterial activity in 0.1 μgLl B[α]P treatment group （P〉0.05）. Thus, B[α]P has evident toxic effects on scallop immune system, which supports the view that a relationship exists between pollution and lmmunomodulation in aquatic organisms.  相似文献   

多源卫星高度计有效波高数据融合方法研究   总被引：2，自引：1，他引：1  

陈小燕  杨劲松  黄韦艮  王隽  王贺  张荣 《海洋学报》2009,31(4):51-57

有效波高数据融合可以弥补单颗卫星高度计数据存在的时间和空间分辨率不足的问题,为有效波高的海洋学应用提供更精确的分析资料.对反距离加权法、克里金插值法和逐步订正法等数据融合方法进行了研究,得到了适合于有效波高数据融合的模型和参数,并利用GFO,Jason-1和Envisat高度计获取的我国海域及其邻近海域有效波高数据,对不同融合方法、滤波器窗口和卫星个数等影响融合结果的因素进行了分析,结果表明:(1)融合后的有效波高分布特征与前人多年统计分析结果基本一致;(2)数据较密集时,不同融合方法的结果差别不大;(3)选择的滤波器窗口大小与时间分辨率有关,对于时间分辨率为10d的融合而言,采用2.5°×2.5°~3°×3°大小的滤波器窗口所得到的融合结果最合适;(4)参加融合的卫星个数至少为3颗.  相似文献   

Distribution of organic carbon in sediments and its influences on adjacent sea area in the turbidity maximum of Changjiang Estuary in China   总被引：2，自引：0，他引：2  

GAO Jianhu  WANG Yaping  PAN Shaoming  ZHANG Rui  LI Jun  BAI Fenglong 《海洋学报(英文版)》2008,27(4):83-94

Distributions and sources of total organic carbon （TOC）in seabed sediments and their implications for hydrodynamics are analyzed, in the turbidity maximum of the Changjiang Estuary. Ecology ecoenvironmental effects of estuary water on the continuously increasing terrigenous organic carbon from the Changjiang River are also explored through variations of organic carbon content and water quality indicators. Results show that, hydrodynamics exert important influences on distributions of organic carbon in the tur- bidity maximum of Changjiang Estuary. For their redistribution effect of terrigenous organic carbon within the moving layer in the whole region, variations from land to sea are not indicated by surficial and vertical average values of TOC and total nitrogen （TN） contents in core sediment, as well as organic stable carbon isotopes in surface sediments. However, on the long-time scale, the trend of terrigenous organic carbon decreasing from land to sea is still displayed by variations of stable carbon isotopic average values becoming heavier from land to sea. Previous studies have shown that high content of Chl a cannot appear in the Changjiang Estuary in despite of adequate nourishment supply, because photosynthesis of phytoplankton is constrained by high suspended sediment concentration（SSC）. However, an area with a high content of Chl a occurs, which may be caused by resuspended benthic algae with bottom fine grain-size sediments. Tremendous pressures are imposed on the environment of Changjiang Estuary, because of uhrophication trends and special hydrodynamics. Phytoplankton bloom area tends to extend from the outer sea to the mouth of Changjiang River.  相似文献   

福建省沙埕港百年一遇台风风暴潮的计算   总被引：2，自引：0，他引：2  

董剑希  仉天宇  付祥  吴玮  赵联大  吴少华  于福江 《海洋通报》2008,27(1):9-16

研究了福建省沙埕港风暴潮状况,根据收集的沙埕验潮站连续50a(1956-2005)的台风过程增水资料以及西北太平洋57 a 的台风资料,采用皮尔逊Ⅲ统计法和数值法分别计算了沙埕港的100a一遇台风暴潮和 100a一遇最大台风暴潮,并得到了产生这两种台风增水的台风路径及强度等台风参数.沙埕港100a一遇台风暴潮为198 cm,100a一遇最大台风暴潮为243 cm,其中产生100a一遇台风暴潮的台风移向为NW方向,移速为19km/h,路径位于沙埕港南12km;产生100a一遇最大台风暴潮的台风移向为 NW 方向,移速为19 km/h,路径位于沙埕港南24km.计算结果为福建沿海海洋工程项目的建设提供了重要参考依据.  相似文献   

Variation in downwelling diffuse attenuation coefficient in the northern South China Sea   总被引：2，自引：0，他引：2  

王桂芬  曹文熙  杨顶田  许大志 《中国海洋湖沼学报》2008,26(3):323-333

The diffuse attenuation coefficient for downwelling irradiance （Kd（λ）） is an important parameter for ocean studies. Based on the optical profile data measured during three cruises in the northern South China Sea in autumn from 2003 to 2005, variations in the Kd（λ） spectra were analyzed. The variability of Kd（λ） shows much distinct features in both magnitude and spectra pattern, it is much higher in coastal waters than that of open oceanic waters; and the blue-to-green （443/555） ratio of Kd（λ） tends to increase with chlorophyll a concentration （[Chl-a]） from open ocean to coastal waters. These characteristics can be explained most by the increase of aw＋p（443）/aw＋p（555） with [Chl-a]. In short waveband, the relation between Kd（λ）-Kw（λ） and [Chl-a] can be well described by a power law function, indicating the large contribution of phytoplankton to the variations in Kd（λ）. As for the spectral model of the diffuse attenuation coefficient, there are good linear relationships between Kd（490） and Kd（λ） in other wavelengths with own slope and intercept of a linear functions in the spectral range 412-555 nm. Kd（490） is well correlated with the spectral ratio of remote sensing reflectance; and should enough measurement data are given, this empirical algorithm would be used in the Kd（λ） retrieval from ocean color satellite data. The variation in Kd（λ） provides much useful information for us to study the bio-optical property in the northern South China Sea.  相似文献   

���������������������ЧӦ��ǿ�����������     

李松林  赖晓玲  何加勇  田建华 《大地测量与地球动力学》2008,28(5):16-20

?????й???????????????????????????????????????????λ???????????????????????????????????????????ī?????????????????????????棬???????????????????????????????????????????????????????????????????????????????????Ч?????????????????????????????????????????????????????????????λ?????????????????????λ?????????????????????????????????????????????????????????????????????壬????????????????????????????д???  相似文献   

珠江口水体叶绿素a浓度高光谱反演研究   总被引：2，自引：0，他引：2  

刘大召  唐世林  付东洋 《广东海洋大学学报》2008,28(1):49-52

对珠江口水体进行了现场光谱测量和同步的水质采样分析,发现695nm处的一阶导数光谱数据对叶绿素a浓度有很好的指示作用,由此建立了基于695nm处一阶导数光谱数据的叶绿素a浓度的线性模式、二次多项式模式、三次多项式模式和指数模式。两次实验的结果表明:指数模式的R2(确定系数)为0.7584,预测平均相对误差为26.7239,是估算珠江口水体叶绿素a的最佳的模式。  相似文献   

Transcriptomic Response of Nannochloropsis oceanica to Benzo[a]pyrene     

ZHANG Zhongyi  GUO Li  LIU Hang  LIANG Sijie  YANG Guanpin 《中国海洋大学学报(英文版)》2019,(3):680-686

  相似文献   

MODIS水色产品在中国黄、东海海域应用研究     

姜玲玲  郭翔宇  王林  Sathyendranath Shubh  Evers-King Hayley  陈艳拢  李炳南 《海洋学报(英文版)》2020,39(1):91-101

An extensive study collected in situ data along the Yellow Sea(YS) and East China Sea(ECS) to assess the radiometric properties and the concentration of the water constituents derived from Moderate Resolution Imaging Spectroradiometer(MODIS). Thirteen high quality match-ups were obtained for evaluating the MODIS estimates of Rrs(λ), chlorophyll a(Chl a) and concentrations of suspended particulate sediment matter(SPM). For MODIS Rrs(λ), the mean absolute percentage difference(APD) was in the range of 20%–36%, and the highest uncertainty appeared at 412 nm, whereas the band ratio of Rrs(λ) at 488 nm compared with that at 547 nm was highly consistent, with an APD of 7%. A combination of near-infrared bands and shortwave infrared wavelengths atmosphere correction algorithm(NIR-SWIR algorithm) was applied to the MODIS data, and the estimation accuracy of Rrs were improved at most of the visible spectral bands except 645 nm, 667 nm and 678 nm. Two ocean-colour empirical algorithms for Chl a estimation were applied to the processed data, the results indicated that the accuracy of the derived Chl a values was obviously improved, the four-band algorithms outperformed the other algorithm for measured and simulated datasets, and the minimum APD was 35%. The SPM was also quantified. Two regional and two coastal SPM algorithms were modified according to the in situ data. By comparison, the modified Tassan model had a higher accuracy for the application along the YS and ECS with an APD of 21%. However, given the limited match-up dataset and the potential influence of the aerosol properties on atmosphere correction, further research is required to develop additional algorithms especially for the low Chl a coastal water.  相似文献   

应用测距三角高程法进行跨河水准测量     

夏月晖 《北京测绘》2020,(3):314-318

为将三角高程法跨河水准测量的技术规范要求对应到工程案例中,有效指导技术人员实际操作,本文通过工程实例,按测距三角高程法跨河水准测量的作业流程、计算公式、各未知数据求值展开,逐层解构分析,细致阐述跨河水准测量中测距三角高程法的要点,实例验证了利用测距三角高程测量实现二等跨河水准测量的可行性。同时对“跨河垂直角观测时视线长”的简易计算公式进行了推导,探讨了计算结果的准确性和有效性,对跨河二等水准测量具有较好的推广价值。  相似文献