Development of novel microsatellite markers for Holothurian scabra (Holothuriidae), Apostichopus japonicas (Stichopodidae) and cross-species testing in other sea cucumbers     

上官静波  黎中宝 《中国海洋湖沼学报》2018,36(2):519-527

Thirty-five new microsatellite loci from the sea cucumbers H olothurian scabra(Jaeger, 1833) and Apostichopus japonicas(Selenka, 1867) were screened and characterized using the method of magnetic bead enrichment. Of the twenty-four polymorphic loci tested, eighteen were consistent with Hardy-Weinberg equilibrium after a modified false discovery rate(B-Y FDR) correction, whereas six showed statistically significant deviations(CHS2 and CHS11: P 0.014 790; FCS1, FCS6, FCS8 and FCS14: P 0.015 377). Furthermore, four species of plesiomorphous and related sea cucumbers(Holothurian scabra, Holothuria leucospilota, Stichopus horrens and Apostichopus japonicas) were tested for mutual cross-amplification using a total of ninety microsatellite loci. Although transferability and universality of all loci were generally low, the results of the cross-species study showed that the markers can be applied to identify individuals to species according to the presence or absence of specific microsatellite alleles. The microsatellite markers reported here will contribute to the study of genetic diversity, assisted breeding, and population conservation in sea cucumbers, as well as allow for the identification of individuals to closely related species.  相似文献   

关中盆地西安凹陷地热水赋存特征及其资源量估算     

黄建军  周阳  滕宏泉  梁欣阳  高晶波  曹晓凡  薛胜泽  崔阳 《西北地质》2021,(1):196-203

地热资源的开发利用有助于调整能源结构、提高环境质量和治污减霾.关中盆地西安凹陷地热水赋存条件较好,资源量丰富,地热水具备规模化开发利用的基础.目前,未见关于西安凹陷地热储层划分及资源量的研究.将西安凹陷地热水热储层分为红河-白鹿塬组、新近系的冷水沟-寇家村组、蓝田灞河组、张家坡组4类,对其系统分析每类热储层的储盖特征、...  相似文献   

Tillage pedogenesis of purple soils in southwestern China   总被引：5，自引：2，他引：3  

HE Xiubin*  BAO Yuhai    NAN Hongwei  XIONG Donghong  WANG Li  LIUYanfeng    ZHAO Jingbo Institute of Mountain Hazards  Environment  Chinese Academy of Sciences  Chengdu  China Graduate School of the Chinese Academy of Sciences  Beijing  China Shaanxi Normal University  Xi’an  China 《山地科学学报》2009,6(2):205-210

Land cultivation and tillage process, and their consequent impacts on soil erosion, have been criticized as the main cause of degradation of land or soil quality. However, purple soils, classified as Regosols in FAO Taxonomy or Entisols in USDA Taxonomy, are formed from purple rocks of the Trias- Cretaceous system, have been developed or at least accelerated the development due to continual tillage operation, especially digging and ridging. The present study took micromorphological investigation on the sedimentary rocks and the soils under different operations of tillage. Results show that the purple rock of Feixiangguan Formation of the Trias system （Tlf） is the easiest to physical weathering and the most fertile soil material enriched in nutrients, and it has been, therefore, mostly cultivated and intensively tilled around the year. It has the fastest soil formation rate. Soil formation rate in the cropland with conventional tillage is higher than that in the forestiand and the grassland. It implies that the artificial brokenness and tillage disturbance play a great role in physical weathering and initiating soil formation processes.  相似文献   

Estimation of suspended sediment concentrations using Pulse-coherent Acoustic Doppler Profiler （PCADP）   总被引：3，自引：0，他引：3  

柏秀芳  李思忍  龚德俊  徐永平  姜静波 《中国海洋湖沼学报》2009,27(2):260-265

The objective of the study is to investigate the suitability of using Pulse-coherent Acoustic Doppler Profiler (PCADP) to estimate suspended sediment concentration (SSC). The acoustic backscatter intensity was corrected for spreading and absorption loss, then calibrated with OBS and finally converted to SSC. The results show that there is a good correlation between SSC and backscatter intensity with R value of 0.74. The mean relative error is 22.4%. Then the time span of little particle size variation was also analyzed to exclude the influence of size variation. The correlation coefficient increased to 0.81 and the error decreased to 18.9%. Our results suggest that the PCADP can meet the requirement of other professional instruments to estimate SSC with the errors between 20% and 50%, and can satisfy the need of dynamics study of suspended particles. Supported by National High Technology Research and Development Program of China (863 Program, No. 2008AA09Z113)  相似文献   

全新世高温期气候不稳定性记录   总被引：13，自引：0，他引：13  

陈云  李铮华  赵景波  张俊牌  贾艳琨 《海洋地质与第四纪地质》1999,19(3):97-103

对黄土高原黄土剖面中的黑垆进行了植物孢粉植物硅酸体,碳同位素和化学分析测试,结果表明,黑垆土良好地记录了全新世高温期气候不稳定性,在大致９－６ｋａＢ．Ｐ．期间,曾发生数次强度不等的快速变化。  相似文献   

铁尾砂抗剪强度参数随固结度变化规律研究          下载免费PDF全文

张敬博  车高凤  张文强 《地震工程学报》2021,43(2):453-458

为了探究铁矿尾矿砂抗剪强度参数随固结度的变化规律,分别对不同固结度、不同干密度的铁矿尾矿砂进行三轴固结不排水试验(CU试验),以总应力法和有效应力法得到尾矿砂的抗剪强度参数及有效抗剪强度参数.分析表明,对于同一干密度的尾矿砂,随着固结度的增加,抗剪强度指标及有效抗剪强度指标均逐渐增加.固结度的变化对黏聚力c及有效黏聚力...  相似文献   

辽南晚中生代以来的剥露冷却历史     

陈慧  刘建辉  丁正江  孙敬博  金巍 《地质学报》2022,96(4):1163-1181

古太平洋/太平洋板块与欧亚大陆的持续相互作用不仅引发了中国东部强烈的构造变形及岩浆活动,而且使古老而稳定的华北克拉通东部陆块岩石圈在中生代发生减薄、去克拉通化和破坏,并诱发克拉通地壳的持续拉张与减薄.为了更好地理解华北克拉通破坏后地壳持续拉张减薄过程及机制,本文利用锆石/磷灰石(U-Th)/He及裂变径迹等多种低温热年...  相似文献   

陕西秦岭翠华山泉水化学成分研究          下载免费PDF全文

赵景波  肖军  李瑜琴  岳应利  刘再华 《第四纪研究》2005,25(5):568-573

为了研究泉水化学成分特点和在一年内的变化,文章利用pH-电导率自动记录仪对陕西秦岭翠华山地区两处泉水化学成分进行了每月2次的观测,并进行了水化学分析。翠华山泉水中HCO-3含量在76.27～152.55mg/L之间,Ca_²⁺含量在14.48～26.92mg/L之间,Mg²⁺含量在4.46～4.89mg/L之间,K⁺含量在0.60～2.75mg/L之间,Na⁺含量在0.93～1.09mg/L之间,这些成分的特点是含量低。泉水pH值在6.98～5.69之间,夏秋季低于该区雨水的pH值,具酸性特征,这是该区地层主要由片麻岩构成决定的。从1月到11月,水秋池村泉水pH值和电导率呈现由大到小再到大的变化规律,引起这种变化的主要原因是夏秋季土壤CO₂含量比冬春季高,泉水在夏秋季流动过程中吸收了较多的CO₂。翠华湖西泉水pH值和Ca²⁺,Mg²⁺,K⁺,Na⁺离子含量比水秋池泉水高,从1月到11月Ca²⁺,Mg²⁺,K⁺,Na⁺离子含量变化与水秋池泉水变化相反,这应当是两个泉水的来源不同或在流动过程中遇到了酸碱性不同的土层和地层造成的。翠华山地区泉水化学成分变化是易于观测到的规律性很强的变化。  相似文献   

西安蓝田杨家湾黄土中第一层古土壤(S1)元素含量与环境     

赵景波  邢闪  董红梅  齐子云 《第四纪研究》2011,31(3):514-521

研究地区处在关中平原的中南部,蓝田杨家湾剖面距西安市东约50km.在第一层古土壤(S<,1>)剖面中以10cm间隔采样,共采集样品41个.利用X-荧光元素分析仪进行了元素分析,根据野外观测确定了Fe2O<,3>和CaCO<,3>的迁移深度、风化淋滤黄土的分层及厚度.野外观察识别出了S<,1>古土壤粘化层之下发育了深部风...  相似文献   

西准噶尔克拉玛依岩体的成因:年代学、岩石学和地球化学证据   总被引：11，自引：0，他引：11       下载免费PDF全文

贺敬博  陈斌 《地学前缘》2011,18(2):191-211

西准噶尔地区克拉玛依岩体主要由闪长岩和花岗岩组成,锆石SHRIMP法给出的岩体结晶年龄为(315.5±2.8)Ma,为晚石炭世侵入岩.克拉玛依岩体具岛弧岩石的元素地球化学特征:总体上岩石富钠.A/CNK=0.57～0.84,富集LREE,(La/Yb)N=4.7～6.1,Eu显示弱负异常(δEu=0.76～0.91),...  相似文献