盘锦市近岸海域生物资源现状及几点建议

根据异养细菌丰度、浮游动物、浮游植物与底栖动物的生物量分布及种类组成等现场调查结果和近期海洋渔业生产资料，论述了盘锦市近岸海域生物资源现状。并根据该地区油气资源开发和海洋生物资源（尤其是经济贝类资源）保护的需要提出了几点建议。     

Fine particle-bound PAHs derivatives at mountain background site (Mount Tai) of the North China: Concentration, source diagnosis and health risk assessment

Ten nitrated polycyclic aromatic hydrocarbons (nPAHs) and 4 oxygenated polycyclic aromatic hydrocarbons (oPAHs) in fine particulate matter (PM_2.5) samples from Mount Tai were analyzed during summer (June to August), 2015. During the observation campaign, the mean concentration of total nPAHs and oPAHs was 31.62 pg/m³ and 0.15 ng/m³, respectively. Two of the monitored compounds, namely 9-nitro-anthracene (9N-ANT) (6.86 pg/m³) and 9-fluorenone (9FO) (0.05 ng/m³) were the predominant compounds of nPAHs and oPAHs, respectively. The potential source and long-range transportation of nPAHs and oPAHs were investigated by the positive matrix factorization (PMF) method and the potential source contribution function (PSCF) methods. The results revealed that biomass/coal burning, gasoline vehicle emission, diesel vehicle emission and secondary formation were the dominant sources of nPAHs and oPAHs, which were mainly from Henan province and Beijing-Tianjin-Hebei region and Bohai sea. The incremental life cancer risk (ILCR) values were calculated to evaluate the exposure risk of nPAHs and oPAHs for three group people (infant, children and adult), and the values of ILCR were 7.02 × 10^?10, 3.49 × 10^?9 and 1.41 × 10^?8 for infant, children and adults, respectively. All these values were lower than the standard of EPA (Environmental Protection Agency) (<10^?6), indicating acceptable health risk of nPAHs and oPAHs.     

中扬子台地北缘灯影组碳酸盐岩成岩作用序列及成岩模式

研究区主要的成岩作用类型有胶结、溶解、硅化、白云石化、压实-压溶和去白云石化作用等，详细研究了每种成岩作用的矿物岩石学特征及对孔隙形成、演化的影响。把研究区成岩环境划分为大气淡水成岩环境、海水成岩环境、混合水成岩环境、埋藏成岩环境和晚期表生成岩环境五大类．总结了每种成岩环境的成岩组构特征、成岩标志、δ18O和δC及微量元素Na+、Sr2+的分布规律。此外，还探讨了深水斜坡相粉-细晶白云岩和台地浅滩相颗粒白云岩的成岩演化序列与孔隙演化，最后概括出了研究区碳酸盐岩的成岩作用模式。     

上海市第二水源长江取水口环境生物调查和质量评价——(Ⅰ.浮游生物)

本文应用水生物、污水生物体系的划分阶段,以评价上海市第二水源长江两个取水口的环境质量.1989年枯水期(2～3月)和丰水期(7月)在长江口河流段南岸的浏河和浪港二个站位,分别在近岸(5m水深)和远岸(10m水深上、下层)的断面,进行浮游植物,浮游动物调查.结果认为两个取水口应是β中污型(βm),属尚清洁带.相比之下,浏河站比浪港站差,近岸比远岸差,丰水期低潮时比高潮时差,浏河站丰水期比枯水期差,浪港站枯水期比丰水期差.其主要受自邻近河道排放水,上海市污水排放和涨落潮污水流向变化的影响,反映了河口区环境的复杂性.     

Impacts of climate change on wheat development and production in the northern China

In this paper, impacts of climate change on wheat development rate and production in the northern China are discussed. The results show that the temperature is a controlling factor of development rate but the precipitation is not. The higher the temperature is. the faster the development and the shorter development period will be. Without consideration to varieties and cropping system, meteorological yield of winter wheat would decrease 170.40, 134.25, 98.70 and 97.20 kg/hm2 in the north China and 13.97, 7.95, 39.60 and 19.80 kg/hm2 in the northwest China compared with that in 1950s, 1960s, 1970s and 1980s, respectively, when the CO2 concentration in the atmosphere is doubled. In drought and semi-drought regions, the spring wheat yield would drop with the temperature rise in and raise with the precipitation increase. The influence of temperature on weight of leaf and stalk is also remarkable.     

云山国家森林公园土壤动物资源生态特征

1998年5月至2001年5月对云山国家森林公园土壤动物资源进行了生态特征研究,共获得土壤动物9769个,隶属6门13纲31个类目。亚热带土壤动物的类群在这里几乎都有分布。其中优势类群为蜱螨目、弹尾目及线虫类3类;常见类群有膜翅类、双尾目、原尾目、线蚓类、双翅目5类;其余为稀有类群。通过与我国东西方向及其南北方向上典型土壤动物生态群落的分析比较,研究过程发现,受其地表生物多样性的影响,云山土壤动物资源种群丰富;原始群落结构完整;区系组成地带过渡性明显;山体顶部灌丛地段节肢动物有个体偏大的生态特征。研究结果表明:地处我国南岭、雪峰山及滇黔桂地区3种不同类型山系过渡地带的云山国家森林公园,作为自然保护区,不但是一个资源丰富的地表生物生态基因库,同时还是一个异常宝贵的地下生物生态基因库。     

甲基紫褪色光度法测定电镀废水中微量的铜

研究了在HNO3介质 ,95℃沸水浴中 ,Cu2 + 催化过氧化氢氧化甲基紫褪色反应的适宜条件及影响因素 ,据此建立了动力学褪色光度法测定微量Cu2 + 的新方法。方法的线性范围为 0～ 12 0 μg L ,表观摩尔吸光系数为 2 88× 10 5L mol·cm ,最大吸收波长为 5 80nm ,方法的检出限为 1 79× 10 - 1 0 μg L。该法应用于电镀废水中铜的测定 ,结果令人满意。     

滇池水体中透明度的遥感定量模型研究

研究利用滇池 1999年 4月 14日陆地卫星TM数据与准同步全湖面监测资料 ,对滇池全湖水体透明度与不同波段遥感值的关系进行了关联度分析 ,并据此建立了TM图像遥感透明度水质模型 ,该模型被成功地应用于滇池水体透明度的遥感动态监测。     

生物法净化含NO_x尾气的研究

以化纤厂废水处理曝气池的活性污泥为接种污泥 ,采用生物法处理硝酸碱吸收后的含NOx 尾气。初步研究表明 :静态、动态培养驯化挂膜后 ,可见到短杆菌属的脱氮菌 ,在进气浓度、循环液pH值、液气比等一定的条件下 ,可获得较高的脱氮效率。生物法是净化含NOx 废气的可行途径     

树木水分胁迫和抗旱性机理研究进展

本文从植物对干旱胁迫的反应和抗旱指标、光合作用和蒸腾作用和水分利用效率等研究途径,以及人工采取的抗旱措施等方面阐述了森林植物的抗旱性机理研究现状,并提出了今后研究的重点方向。