2008年夏季白令海和北冰洋异养浮游细菌丰度与分布特征

利用2008年夏季我国第3次北极科学考察资料,基于流式细胞技术,对白令海北部陆架区的微微型浮游植物丰度、细胞大小(碳含量)、色素浓度的分布特征进行了分析,并对该类群的环境适应性进行了研究。结果表明,微微型浮游植物中仅含聚球藻和真核藻,其丰度范围分别为0.14×106 2.69×106和0.23×106-12.49×106个/dm3。聚球藻的叶绿素a和藻红蛋白含量、微微型真核藻的叶绿素a含量与类群丰度以及微微型真核藻的类胡萝卜素含量与细胞大小间均存在同向变化趋势。两类藻偏向于喜温嗜淡型,更适合在寡营养环境中保持较高的丰度,但能在高营养盐浓度下形成相对较高的碳含量。越接近陆地,细胞越小,丰度越大,碳含量及FL2/FL3越低;所处层位越深、纬度越高,则细胞越大,碳含量及FL2/FL3越高。北极气温升高和径流量的增加有利于陆架区微微型浮游植物类群丰度的增加。     

轴流转桨式机组水电站事故闸门设置方式初探

近年轴流转桨式机组水电站进水口事故闸门有两种布置方式,一门一机布置和多门一机布置.本文结合轴流转桨式机组特性,阐述防止机组飞逸的保护措施.然后通过两种布置方式的优缺点比较,建议采用一门一机的方式.     

莱芜市节约集约用地的调查与思考

随着城乡建设和市、区经济发展进程不断加快,莱芜市用地矛盾十分尖锐,仍然有粗放利用、破坏浪费土地资源的现象,特别是部分经营者圈而不用,造成土地的闲置浪费。总结了莱芜市国土资源局市区分局在节约集约用地方面取得的成效,分析了存在的问题,并提出了合理化建议。     

矿床水文地质勘查类型划分探讨

矿床水文地质勘查类型划分是进行矿床水文地质勘查重要环节,是做好和优化勘查设计的主要依据。根据我国煤炭矿山经过几十年的开采,特别是近十几年来大规模开采,煤矿水文地质条件发生了较大变化,现行规范划分方案在实际应用中不基础上,结合《煤矿防治水规定》,提出了矿床水文地质勘查类型划分的新方案：类分孔隙充水矿床、裂隙充水矿床、岩溶充水矿床、老空水充水矿床、地表水充水矿床和复合式充水矿床6个;亚类分顶板充水、底板充分水、周边充水和组合式充水4个;型分水文地质条件简单、中等、复杂和极复杂4个。     

对国有地勘单位人力资源管理的对策建议

近年来,国有地勘单位在改革发展中,人力资源管理方面普遍存在职工观念滞后、冗员较多、员工积极性不高、人才流失等问题。以总局管理下的某地勘单位为例,对国有地勘单位人力资源现状及存在的主要问题进行了梳理,总结提出了在当前环境下加强人力资源管理的对策及建议：强化人力资源管理意识,营造适宜人才发展的良好氛围;完善用人机制,加大人力资本投入;实施人力资源综合发展战略,设计合理的人才培训计划;深入体制改革,激发员工创新的积极性。     

Polycyclic aromatic hydrocarbon concentrations in urban soils representing different land use categories in Shanghai

An extensive soil survey was carried out in Shanghai to investigate the spatial distribution and possible sources of polycyclic aromatic hydrocarbons (PAHs) in urban soils. Soil samples were collected from highways, iron-smelting plants, steel-smelting plants, shipbuilding yards, coking plants, power plants, chemical plants, urban parks, university campuses and residential areas and were analyzed for 16 PAHs by gas chromatography with mass detection. High PAH concentrations were found in all locations investigated, with mean values of soil total PAH concentrations in the range 3,279–38,868 μg/kg DM, and the PAH concentrations were significantly influenced by soil organic matter content. Soil PAH profiles in all districts were dominated by PAHs with 4–6 rings. Principal components analysis and diagnostic ratios of PAHs indicate that they were mainly derived from coal combustion and petroleum but in soils from highways the PAHs were derived largely from vehicle exhaust emissions. The high concentrations of PAHs found indicate that many urban soils in Shanghai represent a potential hazard to public health.     

Measuring and modeling atmospheric particles and particle bound mercury Hg(p) at five characteristic-sampling sites

The main purpose of this study was to monitor ambient air particles and particulate-bound mercury Hg(p) in total suspended particulates (TSP) concentration, dry deposition at five characteristic-sampling sites. In addition, the calculated/measured dry deposition flux ratios of ambient air particles and particulate-bound mercury Hg(p) using three dry deposition models during the years of 2009–2010 were also studied. The results showed that the order of seasonal variations for mean particulate-bound mercury Hg(p) concentrations in TSP at Bei-shi (suburban/coastal), Chang-hua (downtown) and He-mei (residential) were all shown as spring > fall, winter > summer, respectively. However, the order of seasonal variations mean particulate-bound mercury Hg(p) concentrations in TSP that occurred at Gao-mei (wetland) were shown as spring > fall > winter > summer, respectively. Finally, the results of this study also indicated that using the Noll and Fang model exhibited batten prediction results for ambient air particles and particulate-bound mercury Hg(p) dry deposition when compared with the other depositions models at any of the characteristic-sampling sites for this study.     

Calanoid copepods assemblages in Pearl River Estuary of China in summer: Relationships between species distribution and environmental variables

To study the relationships between species distribution and environmental variables, calanoid copepods were classified and enumerated, and environmental variables were analyzed along 91 sites of the Pearl River Estuary (China) and adjacent waters. The 91 sites were divided into 3 groups based on surface salinity: the Inner area had salinity level below 10‰ and was mostly located in the Pearl River Estuary, the Coastal area had salinity between 10‰ and 32‰ and was almost located along the coastline, while the Offshore area had salinity level higher than 32‰ and was mainly located in the open area. Indicator Species Analysis was conducted to identify the indicator species within each group from among all calanoid copepods taxa. We found that the Inner area was characterized by Acartiella sinensis, Pseudodiaptomus poplesia and Pseudodiaptomus inopinus, the coastal area was characterized by Temora turbinata and Subeucalanus subcrassus, and the Offshore area was characterized by Paracandacia truncata, Subeucalanus subtenuis, Euchaeta rimana, Pareucalanus attenuatus, Rhincalanus cornutus, Cosmocalanus darwini, Centropages gracilis, Undinula vulgaris, Nannocalanus minor and Paraeuchaeta russelli. Canonical Correspondence Analysis (CCA) was used to identify relevant biotic and abiotic parameters that can best explain the distribution of calanoid copepods. CCA showed that during the summer of 2006, salinity, nutrient variables, especially SiO₃–Si, NO₃–N and DTN, Depth and Chl a were the environmental variables that strongly impacted the distribution and community structure of calanoid copepods.     

山东省地层划分对比厘定意见

山东省地层大部属华北地层大区晋冀鲁豫地层区,再分为华北平原、鲁西及鲁东三个地层分区,鲁东南海域日照市平岛、达山岛及车牛山岛等属华南地层大区扬子地层区连云港地层分区。岩石地层分为27个(岩)群120个(岩)组12个正式段,还有相当数量的非正式段。恢复奥陶纪东黄山组、北庵庄组、土峪组、五阳山组、阁庄组、八陡组,并6个组为马家沟群;恢复二叠纪黑山组、万山组、奎山组和孝妇河组,并4个组为石盒子群;在青州—临朐地区识别出奥陶纪亮甲山组。地质代号原则上遵从最新的国家标准及行业标准。     

两株河口湿地耐盐石油降解菌的生物学特性及降解能力研究

从辽河口湿地污染土壤样品中分离筛选出2株高效石油降解茵lhk-2和lhk-10,经鉴定lhk-2为巴氏萄萄球菌(Staphylococcus pasteuri),lhk-10为嗜麦芽寡养单胞菌(Stenotrophomonasmaltophili).两株菌的石油降解能力研究结果表明,培养8d后,加菌组的石油烃降解率均在...