干旱区生态环境知识资源中心(Arid): 青海柴达木盆地与青海湖第四纪介形类Limnocythere的分类与生境

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	青海柴达木盆地与青海湖第四纪介形类Limnocythere的分类与生境
其他题名	TAXONOMY AND HABITAT OF QUATERNARY LIMNOCYTHERE (OSTRACODA) FROM THE QAIDAM BASIN AND THE QINGHAIHU LAKE,QINGHAI
	杨藩 1; 董宁 1; 乔子真 1; 孙镇城 2; 任玉芬 1
ISSN	1000-0674
出版年	2008
卷号	25 期号:4 页码:316-332
中文摘要	在对研究区内第四系及现代沉积中大量分布的Li mnocythere壳进行再鉴定、并对文献中的相关图片及文字描述进行复查后,未能发现具有L.dubiosa种征(♀个体中背部深深内凹;♂个体背视两侧近平行,最大宽度位于中前部且右壳比左壳长)的壳体存在,也没有找到壳长达到L.sancti-patricii定种标准的壳瓣。此前研究区内被定名为L.dubiosa及L.sancti-patricii者实为L.inopinata的无瘤个体及单瘤个体,而L.binoda则应属次异名。区内L.inopinata无瘤个体在现代沉积中的分布表明:尽管L.inopinata是广盐、广钙和广流速种,但它偏好渐盐水特别是盐度低于14的中盐水低钙静水水体的特征明显。有瘤个体的出现似可指示其生活环境为高硅含量的低盐度水域。
英文摘要	Limnocythere is one of the most abundant,widespread members in the Quaternary ostracod fauna from the Qaidam Basin and the Qinghaihu Lake,Qinghai Province,but its taxonomy in the study area,is controversial up to now.Limnocythere dubiosa,L.sancti-patricii,L.binoda and L.inopinata have been identified from the genus in the study area by many authors,and the other authors refer most members of the genus to one species -.inopinata.Re-identification of a large number of Limnocythere distributed in Quaternary System and recent sediments from the study area shows that no valves which bear the species features of L.dubiosa(seen dorsally:female with deep transverse depressions before middle of the shell;male shell bilateral sub-parallel and right valve more extended than the left)have been found,and no above-mentioned figures and description for the Limnocythere species features reported in the literature are related to Quaternary Limnocythere from Qinghai-Xizang(Tibet)Plateau.In addition,the authors have not seen specimens in their identified L.sancti-patricii,for its distinguished large size(females 0.75 mm,males >0.80 mm),and have not seen the interrelated figures and descriptions with this size reported from the Quaternary System or recent sediment in the study area either.In the Qaidam Basin and the Qinghaihu Lake,even probably all the semi-arid and arid regions of China,the species identified L.dubiosa(non L.dubiosa Daday)and L.sancti-patricii(non L.sancti-patricii Brady et Robertson)are the individuals without node and with single node of L.inopinata,respectively.In consequence the nodes on the valves is a phenotypic nature,thus the name L.binoda is a junior synonym of L.inopinata.The distribution of L.inopinata in the study area indicates that the species prefers oligohaline or mesohaline(especially the mesohaline of <14),poor calcium content and calm(stagnant)waters,although it is regarded as a euryhaline,titanoeuryplastic and rheoeuryplastic species.In five samples collected from the oligohaline Xiaosuganhu Lake with lower salinity(S=0.616-0.694),there are a lot of valves of unnoded L.inopinata in most samples,and one sample has a few noded individuals(account for 0.26% of the species population),while the noded individuals occurs frequently in the Qinghaihu Lake(29 samples in 57 samples contain L.inopinata).In the Qinghaihu Lake,with the high salinity of 13.623-14.665,the noded individual is 0.1%-9.1%(average 1.7%)in L.inopinata populations,much higher than that from the samples of the Xiaosuganhu Lake mentioned before.Therefore,the decrease of the salinity is not the direct cause for nodation.In the Erhai Lake(a small lake to the southeast of the Qinghaihu Lake,S=1.156),a great increase in the noded L.inopinata content happens with a highest 50%,which corresponds with the abundant diatom and the high Silica ion in the region.Therefore,the extremly higher Silica is probably the direct reason for the nodation of L.inopinata.
中文关键词	分类 ; 厘定 ; 表型 ; 生境 ; 第四纪 ; 青海
英文关键词	Limnocythere Limnocythere taxonomy collation phenotype habitat Quaternary Qinghai
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PALEONTOLOGY
WOS研究方向	Paleontology
CSCD记录号	CSCD:3459921
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222896
作者单位	1.青海油田公司勘探开发研究院, 敦煌, 甘肃 736202, 中国; 2.(北京)中国石油大学资源与信息学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	杨藩,董宁,乔子真,等. 青海柴达木盆地与青海湖第四纪介形类Limnocythere的分类与生境[J],2008,25(4):316-332.
APA	杨藩,董宁,乔子真,孙镇城,&任玉芬.(2008).青海柴达木盆地与青海湖第四纪介形类Limnocythere的分类与生境.,25(4),316-332.
MLA	杨藩,et al."青海柴达木盆地与青海湖第四纪介形类Limnocythere的分类与生境".25.4(2008):316-332.