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1.
Of the four species ofPisione Grube (1856) collected from the coastal waters of Hainan Island, the South China Sea, and described in this paper,Pisione hainanensis n. sp. is new to science;Pisione oerstedii Grube, 1857;Pisione complexa Alikunhi, 1947, and Pisione levisetosa Zhao, Westheide & Wu, 1991 are reported for the first time from this area.
Project 38970187 supported by NSFC. 相似文献
2.
《中国海洋湖沼学报》2021,(5)
Laetmonice Kinberg,1856 is a remarkable genus characterized by having harpoon notochaetae in the polychaete family Aphroditidae.We describe a new species of Laetmonice,Laetmonice iocasica sp.nov.,found from seamounts on the Caroline Ridge in the tropical Western Pacific.The new species is readily distinguished from congeners,particularly those distributed in the Indo-Pacific Ocean by possessing45 segments with 18 pairs of elytra,and the tuberculated harpoon notochaetae in the elytrigerous segments,which are replaced by tuberculated notochaetae without recurved fangs on segments 4 and 5.Laetmonice iocasica sp.nov.is closely related to L.producta Grube,1877,but differs in both morphology and the genetic distance of the mitochondrial cytochrome oxidase subunit I(COI) sequences.Laetmonice producta Grube,1877 contained five varieties reported in various marine areas,which have been raised to species level.However,the records of L.producta from the Sagami B ay and Suruga B ay in Japan and in the south-eastern Australia remain obscure and probably represent a different species.The data indicate that L.producta,which was originally described from Kerguelen Islands in the Southern Ocean and later commonly found on the Antarctic shelf,is probably distributed only at high latitudes of the Southern Hemisphere. 相似文献
3.
The influence of cadmium on the antioxidant enzyme activities in polychaete Perinereis aibuhitensis Grube (Annelida: Polychaeta) 总被引：1，自引：0，他引：1
The infaunal polychaete Perinereis aibuhitensis Grube, distributed widely along Asian coasts and estuaries, is considered a useful animal model in ecotoxicological tests
and a promising candidate in biomonitoring programs. This paper deals with the activities of antioxidant enzymes including
superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidases (GSH-Px) in infaunal polychaete P. aibuhitensis exposed to a series of sublethal water-bound cadmium (Cd) concentrations (0, 0.34, 1.72, 3.44, 6.89, and 17.22 mg L−1) under a short-term exposure (1–8 d). The results indicate that the SOD and GSH-Px activities in P. aibuhitensis are stimulated first and then renewed to the original level. The CAT activity of worms decreases at an earlier exposure time
but increases to the control values at a later exposure time. Our study suggests that Cd can interfere with the antioxidant
defense system of P. aibuhitensis. However, the changes in antioxidant enzyme activities for this species do not show the best promise as biomarkers in Cd
biomonitoring of estuarine and coastal zones because weak or non-dose-effect relationships between the antioxidant enzymes
activities and Cd levels are found. 相似文献
4.
Wang Shida 《中国海洋湖沼学报》1990,8(3):273-279
Male and female adult midges ofPseudosmittia aizaiensis sp.n. are described and illustrated with figures of morphological characters. The inferior volsella of gonocoxite with large
lobes, the long but equal width gonostylus, and the small projection in basal part of outer margin are the characters that
may separate this species from others. One larva of this genus is purely aquatic in habitat and is associated with Cricotopus
bicinctus,Cardiocladius capucinus andPolypedilum sp. in the same algae debris (Spirogyra sp.) of the Dunghe River. Further, the larva's very short SI and SII bifids, its
5 pairs of lateral teeth on mentum and its absence of premandible brush are the characters that may also separate this species
from any known species of this genus. 相似文献
5.
Batrachospermum arcuatum Kylin is typically dioecious,although some monoecious specimens have been collected from four locations in North China.In this study,B.arcuatum populations,including monoecious and dioecious thalli,were collected from seven stream segments.The nuclear DNA internal transcribed spacer(ITS)region was sequenced for the seven populations,and a phylogenetic tree was constructed using Bayesian inference to assess intraspecifi c relationships.A haplotype network was also created.The ITS region in B.arcuatum from North China comprised 822–853 bp,with 10 haplotypes detected from the seven locations.The results of this study support the inclusion of monoecious individuals in the species B.arcuatum. 相似文献
6.
ＲＥＬＡＴＩＯＮＳＨＩＰＢＥＴＷＥＥＮＱＩＮＧＨＡＩＬＡＫＥＬＥＶＥＬＤＥＳＣＥＮＤＩＮＧＡＮＤＡＲＴＩＦＩＣＩＡＬＷＡＴＥＲ－ＣＯＮＳＵＭＰＴＩＯＮ￥ＰｅｎｇＭｉｎ（彭敏）ＣｈｅｎＧｕｉｃｈｅｎ（陈桂琛）ＺｈｏｕＬｉｈｕａ（周立华）（Ｎｏｒｔｈｗｅ... 相似文献
7.
The amplified fragment length polymorphic DNA (AFLP) technique was adopted to estimate the population genetic polymorphism
among 30 sporophytes of Laminaria japonica collected from a cultivating farm in Rongcheng, China. Three methods were used for genomic DNA extraction from Laminaria japonica sporophyte and only the products obtained using the improved genomic DNA extraction kit method proved qualified for AFLP
analysis. The parameters of the method were optimized. Samples of forty milligrams and the cell lysis time of 120 min were
suggested to replace the parameters recommended by the manufacturer. Thirty individuals of Laminaria japonica from the same cultivating site were investigated using one pair of selective primers. A total of 21 loci were obtained and
17 of them were polymorphic. The mean percent age of polymorphic loci of this population was 80.95%. The Nei’s gene diversity
(H) within this population was 0.3028 and the average Shannon’s Information index (I) was 0.4498. A genetic distance matrix
among different individuals was constructed as well. Through this study, an applicable AFLP genetic analysis working system
for Laminaria japonica sporophyte was established. The results of this research also revealed a high level of genetic diversity within the studied
population. 相似文献
8.
Characteristics and causes of the preconsolidation stress of soils in the Yellow River Delta 总被引：1，自引：0，他引：1
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10.
针对现有速度场模型采用数据少、现势性不强的问题,详细论述了速度场模型建立的数据获取与处理方法,利用中国大陆地壳运动监测网络中260个连续运行基准站2011~2015年的连续观测数据,采用GAMIT/GLOBK与GMT软件,获得高精度的定位及速度成果,并基于上述速度成果采用克里金插值法构建了中国大陆地壳运动速度场1°×1°格网模型。最后利用IERS公布的中国区域7个IGS站实测速度以及全国范围内均匀分布的陆态网络区域站实测速度,对模型内插结果进行检核,验证了模型的现势性、精确性和可靠性。 相似文献
11.
Distribution of suspended matter in seawater in the Southern Yellow Sea is investigated in five regions: 1) the Northern Jiangsu
bank, the highest TSM (total suspended matter) content region; 2) the high TSM content region off the Changjiang River mouth;
3) the high TSM content region off the Chengshan Cape; 4) the low TSM region off Haizhou Bay; 5) the central part of the Southern
Yellow Sea, a low TSM content region. The vertical distribution of TSM is mainly characterized by a spring layer of suspended
matter, written as “suspended-cline” whose genesis is related to storms in winter. In this paper, non-combustible components
and grain sizes in suspended matter, relationship between suspended matter and bottom sediments, and salinity in seawater
are described. Investigation result shows that, in this area, suspended matter comes mainly from resuspended bottom sediment
and secondarily from present discharge loads from rivers and biogenic materials. Discharged sediments from the Huanghe River
move around the Chengshan Cape and affect the northwestern region of this area. Sediments from the Changjiang River affect
only the southern part and have little or no direct influence on the central deep region. Wave is the main factor affecting
distribution of suspended matter. Water depth controls the critical depth acted on by waves. The cold water mass in the central
region limits horizontal and vertical dispersions of terrigenous materials. Suspended matter here has the transitional properties
of the epicontinental sea. Its concentration and composition are different from those of a semi-closed sea (such as the Bohai
Sea) and those of the East China Sea outer continental shelf or those near oceanic areas. 相似文献
12.
A method has been developed for estimating the filtered narrow band surface albedo with Landsat/TM data. In this method, the surface albedo from filtered range of Landsat/TM is converted to the surface albedo with unfiltered spectral range. The atmospheric effects on each channel are systematically different, because of the different spectral behavior of atmospheric parameters. As a result, in this study, atmospheric correction has been done respectively in different parameters for visible and infrared channels. The surface albedos of the Kushiro Mire gotten with this method were compared with the observed data there. The results show that the satellite inferred albedos have a good agreement to the diurnal mean of ground observed albedos with 3% systematic error. There is a seasonal variation of albedo in high and low mires, the albedo decreased gradually from April to July and reached its minimum in July, further it rose gradually from August to October. It is also clear that there is a characteristic pattern of surface distribution according to the vegetation types of this area. The average surface albedos of each type of community are 0.164 for Sphagnum, 0.175 for Carex, 0.179 for Pragmites and 0.166 for Alnus. In the other words, the albedo in high mire (mainly covered by Sphagnum) is lower than that in low mire (mainly covered by Phragmites and Carex). 相似文献
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14.
在三维地质建模中,由于地质剖面与医学CT有本质上的相似性,因此,轮廓线的三维表面重建技术有广泛的应用。目前,较为成熟的算法并没有考虑地质数据的特殊性,由于地质体形态复杂多变,地质剖面稀疏、数据来源多样等特点,将普适的算法应用到地质建模中,只是解决了重建曲面的合理性,并没有关注曲面的几何质量,导致曲面无法达到地质建模对于模型质量的要求。本文针对地质数据的特点,提出了一种新的轮廓线表面重构方法。在不改变轮廓线连接的合理性与正确性的情况下,通过生成过渡剖面轮廓线,克服传统方法生成曲面过于粗糙的缺点,以提高建模质量。在Creatar三维地质基础平台上,对多种情况的剖面数据实验结果表明,在数据稀疏的情况下达到了良好的建模效果。该方法的扩展模型满足了地质剖面轮廓线建模中复杂地质情况,以及交叉剖面数据的曲面重建,且算法复杂度低,实现简单,有较强的实用性。 相似文献
15.
In this paper, a new polychaete species, Eranno carrerai sp. nov. from coastal areas of China, is described based on specimens deposited in the Marine Biological Museum of the Chinese
Academy of Sciences, Qingdao, collected during 1957 to 1976 from the Yellow Sea, East China Sea and South China Sea at depths
of 9–210 m. 相似文献
16.
The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species
but also on their different development stages. Even different parts of the same plant sometimes have different light demands.
Light control is an important procedure at large scaleLaminaria nursery stations in China. Technicians and scientists have different viewpoints on the best method to regulate light. A culture
study onLaminaria japonica starting from zoospores to several centimeter sporophytes to find the optimal and critical irradiance ranges for juvenileLaminaria at different development stages added more knowledge on this aspect. Experiment results show gametophytes can not tolerate
irradiance of more than 150 μE m−2s−1 while sporophytes can tolerate more than 519 μE m−2s−1. This big difference starts from the very early stage of 1-to 2-celled sporophytes. The biological basis and mechanism of
this phenomenon need further research.
Contribution No. 1515 from the Institute of Oceanology, Academia Sinica
Contribution No. 1 from the Experimental Marine Biological Laboratory 相似文献
17.
In Antarctica, the marine ecosystem is dynamically interrelated with the terrestrial ecosystem. An example of the link between these two ecosystems is the biogeochemical cycle of phosphorus. Biovectors, such as penguins, transport phosphorus from sea to land, play a key role in this cycle. In this paper, we selected three colonies of penguins, the most important seabirds in Antarctica, and computed the annual quantity of phosphorus transferred from sea to land by these birds. Our results show that adult penguins from colonies at Ardley Island, the Vestfold Hills, and Ross Island could transfer phosphorus in the form of guano at up to 12 349, 167 036, and 97 841 kg/a, respectively, over their breeding period. These quantities are equivalent to an annual input of 3.96×109–1.63×1010 kg of seawater to the land of Antarctica. Finally, we discuss the impact of phosphorus on the ice-free areas of the Antarctica. 相似文献
18.
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19.
In this paper,three deep-water species of the family Goniasteridae,Ceramaster misakiensis(Goto,1914),Nymphaster arthrocnemis Fisher,1913 and Pontioceramus grandis Fisher,1911,are recorded for the first time from Chinese waters based on collections deposited in the Marine Biological Museum,Chinese Academy of Sciences.The specimens examined were collected during the period 1956 to 1978 from the East China and South China Seas at depths of 184 to 472 m.Diagnosis,detailed figures,and the geographic distributions are provided.A revised list of Goniasteridae recorded from Chinese waters is proposed. 相似文献
20.
Eualus heterodactylus sp. nov., a new hippolytid shrimp from Chinese coast of the Yellow Sea （Crustacea,Decapoda, Caridea） 总被引：1，自引：1，他引：0
A new species from the caridean family Hippolytidae, Eualus heterodactylus sp. nov. is described and illustrated based on the specimens collected from Chinese coast of the Yellow Sea. The new species is a part of an informal species group characterized by the possession of epipods on the anterior three pairs of pereopods, and is distinguished from other species of this group by the dactyli of the third to fifth pereopods possessing distinctly stair-like flexor margins in males. 相似文献