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   

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   

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   

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   

Ordovician Proto–basin in South China and its Tectonic Implications: Evidence from the Detrital Zircon U–Pb Ages of the Ordovician in Central Hunan, China     

ZHANG Jibiao  NI Jingbo  LIU Yanxue  ZHANG Heng  BU Ling 《《地质学报》英文版》2020,94(6):2115-2133

Caledonian orogeny is another important tectonic event in South China Block after the breakup of the Rodinia supercontinent. With a view to constrain the tectonic evolution and proto–basin in South China, this paper reports the geochemical and zircon U-Pb dating data of the Ordovician strata in central Hunan, South China. Geochemical features and paleocurrent directions suggest that the lower Ordovician deposited in a passive continental margin basin with a provenance of quartzose components and showing an affinity with the Yangtze Block. U-Pb age data for 260 detrital zircons from upper Ordovician identify three major age populations as: 900–1200 Ma, 1400–1800 Ma and 2400–2700 Ma. The detrital zircon age spectrum as well as the paleocurrent directions suggest that upper Ordovician deposited in a foreland basin and showing a close affinity with the Cathaysia Block. It is also suggest that the lower Ordovician continuously accepted the mineral from the Yangtze Block, whereas the provenance of the upper Ordovician sedimentary basin changed from the Yangtze Block to the Cathaysia Block. This change implies a tectonic movement, which caused the transformation of the proto–basin in the Hunan area in SCB from passive continental margin basin to foreland basin probably took place during late Ordovician. This fact also demonstrate that the Caledonian orogeny in South China Block began no later than 453 Ma, and a new crustal evolution model is proposed.  相似文献   

东亚沙源地与下游影响区沙尘天气频数变化对比分析     

杭月荷  姜学恭  云静波  衣娜娜  刘珂 《气象科技》2023,51(4):499-509

基于1999—2019年地面气象观测资料,对东亚主要沙尘源地(蒙古国、中国新疆和内蒙古)及中国沙源地下游地区的沙尘天气频数演变特征进行了分析,结果表明：蒙古国是沙尘天气发生最严重的地区,且有明显增加的趋势,扬沙、沙尘暴和强沙尘暴均远高于其他区域。中国整体沙尘天气数量显著减少,新疆快速增多,内蒙古和下游地区明显减少。新疆浮尘发生频次最高,近21 a线性倾向呈明显上升趋势;内蒙古扬沙频次最高,强沙尘暴最少,4类天气均呈逐年减少趋势;我国下游地区多发浮尘和扬沙,沙尘暴和强沙尘暴发生次数很少,全部沙尘天气呈减少趋势。1999—2004年为我国沙尘天气高发期,2005—2019年明显减少,其中2010—2014年减少速度最快。沙尘源地对我国沙尘天气总数的贡献持续增大,从2000年初的39%增长到2015年之后的71%。作为沙尘源地,蒙古国对沙尘天气产生的作用有所增强,而内蒙古则在减弱;国内沙尘源地导致的能够影响并扩展至中国下游地区和下游国家的强沙尘天气显著减少。  相似文献   

复方中草药对珍珠龙胆石斑鱼生长、非特异性免疫及消化酶活性的影响     

徐安乐  黎中宝  上官静波  胡晓伟  黄永春  林茂松  林泽滨 《海洋学报》2018,40(12):49-57

中草药含有多种活性物质,具有抗病助长无残留等特性,在国内外被广泛使用。本试验采用单因素试验设计方法,研究复方中草药（由黄芪、党参、大黄等12种中草药组合而成）不同剂量对珍珠龙胆石斑鱼（Epinephelus lanceolatus ♂×Epinephelus fuscoguttatus♀）生长性能、非特异性免疫及消化酶活性的影响。以初始体质量（19.16±0.25） g,体长为（10.63±0.56） cm的珍珠龙胆石斑鱼为试验对象,在基础饲料中分别添加0、0.4%、0.8%、1.2%、1.6%和2%复方中草药连续饲喂珍珠龙胆28 d。结果显示,该种复方中草药在添加剂量1.6%以内时,能有效降低石斑鱼的饵料系数（P<0.05）,对石斑鱼的增重率和特定生长率影响不显著（P>0.05）,但能显著提高石斑鱼血清中总蛋白含量（TP）、碱性磷酸酶（AKP）、酸性磷酸酶（ACP）以及总超氧化物歧化酶（T-SOD）活性（P<0.05）。对血清中非特异性免疫酶活性影响结果表明,中草药添加剂量在0.8%和1.2%时能很好地提高石斑鱼的免疫能力。石斑鱼肠道中的脂肪酶、胰蛋白酶活性受该种复方中草药的影响显著（P<0.05）,在添加量为1.2%以内显著提高了肠道中脂肪酶活性,胰蛋白酶活性和肠道总蛋白含量,而对淀粉酶活性影响不明显（P>0.05）,中草药对珍珠龙胆石斑鱼肠道消化酶活性的影响在添加剂量为1.2%时尤为明显。综合石斑鱼的生长、非特异性免疫和消化性能结果,认为该种复方中草药的最适添加量为1.2%左右。  相似文献   

江西相山矿田西北部与东南部矿床侵蚀程度的对比分析   总被引：5，自引：3，他引：2  

张万良  刘德长  李子颖  张静波 《大地构造与成矿学》2007,31(3):348-352

江西相山铀矿田是我国赣杭成矿带西段火山岩系中的热液脉型铀矿田,矿床产于相山火山-侵入杂岩体内部及外侧,在空间上分布不均匀,东南部矿床较少,西北部矿床无论是数量还是品位都明显好于东南部。文章通过相山矿田西北部与东南部地貌形态、花岗斑岩产状、碎斑熔岩物化性质、成矿类型的对比分析,认为这种不均衡的矿床产出规律,不是成矿地质结构差异引起的,而是侵蚀程度不同所致。从矿田西北部到东南部,矿床侵蚀深度逐渐加大。  相似文献