漂浮植物修复技术净化城市河湖水体试验研究

阐述了漂浮栽培植物修复系统的技术原理、特点与系统组成, 研究了在该系统中种植美人 蕉和旱伞草2 种植物的生长状况以及这些植物对城市河湖水体中氮、磷等的净化效果。尝试了将 漂浮栽培植物与生物接触氧化技术结合起来, 并研究了植物与生物填料的组合系统对水质的改 善效果。结果表明, 美人蕉和风车草在漂浮植物修复系统对氨氮的去除率均在90%以上, 漂浮栽 培植物与软性填料的组合系统对水中COD_Mn 的去除率达46%以上。     

我国植物内生菌研究进展

基于近年来我国植物内生菌研究成果,综述了我国植物内生菌的研究与开发进展,主要包括内生菌的分类方法、多样性、分布、生物学作用,以及内生菌资源的开发与应用等,并展望了我国内生菌资源的开发和利用前景,以便为进一步研究和利用植物内生菌资源提供理论依据。     

广西隆林县隆或金矿的地质特征和成因分析

隆林县隆或金矿属微粒型金矿，具有多层位、层状矿体为主、矿石和矿物成分简单、沉积结构构造特征，属典型层控矿床。矿床成因与生物礁的消失、滑塌事件、深水火山碎屑硅泥质上超盆地的叠覆、以及有机质的热解和分异有关。火山作用提供金的来源，火山～碎屑～浊积岩相为矿源层和含矿层，并受沉积盆地的关闭和开启影响，形成成岩矿床、成岩～后生或后生矿床     

湖南省农业转化效率的地域差异研究

该文以湖南 10 1个县 (市、区 )为评价单元 ,从粮食单产、化肥生产力、劳动生产率、农业总产值增长率、农民人均收入、人均收入增长率、投入产出率、粮食增长率、粮食保证率等方面 ,研究了湖南农业转化效率的现状及区域差异 ,并进行了农业转化效率的优度排序、分类和分区。湖南农业转化效率水平不高 ,发展不平衡。长衡丘陵盆地区、洞庭湖平原区转化效率优于湘西、湘南山地区。从行政区划上看 ,农业转化效率较优的是湘潭市、株洲市、长沙市等 ,而湘西自治州、张家界市、怀化市等农业转化效率相对较低     

乐清湾口海域春秋季甲壳动物的群落结构特征研究

根据2012年春季和10月在乐清湾口海域开展渔业资源调查所获甲壳动物资料,对乐清湾口海域的甲壳动物的种类组成、优势种、物种数量分布、生物多样性和群落结构相似性等群落结构特征及其影响因素进行了研究。结果表明,调查海域共鉴定出34种甲壳动物,隶属于2目17科23属,春季优势种仅有三疣梭子蟹1种,秋季为日本、口虾蛄、中华管鞭虾、三疣梭子蟹4种,两季优势种更替较显著;秋季物种数较春季丰富,调查水域中心区域物种数较多;秋季甲壳动物生物多样性指数高于春季;甲壳动物群落结构与海洋环境密切相关。乐清湾口海域的甲壳动物以季节性的广温低盐种类为主,该海域位于河口,受瓯江径流影响较大;春季受瓯江径流淡水水团影响,物种较少,而秋季受交汇水团影响,物种丰富;春秋季组内并无明显规律,地形、水深和水系等外部因素对甲壳动物群落结构影响较大。     

拉萨河源头水域中浮游生物、鱼类资源调查与分析

拉萨河是西藏重要的河流之一,流经多个县市,拉萨河的生态性调查和环境保护对西藏的社会和经济发展重要意义。本调查在拉萨河上游11个乡镇分别进行断面取点调查,对各乡镇境内拉萨河段进行浮游生物与鱼类取样统计分析。本次调查中,共检出浮游植物76个种类,其中硅藻门48种,占总种类数的63.2%;绿藻门12种,占总种类数的15.8%;蓝藻门6种,占总种类数的7.9%;金藻门4种,占总种类数的5.3%;隐藻门3种,占总种类数的3.9%;黄藻门和裸藻门各1种,分别占总种类数的1.3%;共检出浮游动物4大类50种,其中原生动物24种,占总种数的48%;轮虫12种,占总种数的24%;枝角类10种,占总种数的20%;桡足类4种,占总种数的8%;共发现1目2科5属的鱼类5种,均为鲤形目,本地鱼类有3种,占总数的60%,外来种有2种,占到总数的40%,其中拉萨裸裂尻鱼(Schizopygopsis younghusbandi Regan)和双须叶须鱼[Ptychobarbus dipogon(Regan)]为雅鲁藏布江特有鱼类。本次调查采集到的外来鱼种有棒花鱼和鳅鱼两种。经本次调查,西藏拉萨河源头流域,生物多样性略贫乏,尤其是鱼类种类较少。而鱼类保护工作面临的两大挑战就是外来鱼种入侵以及过度捕捞而造成的鱼类资源减少。     

The negotiations for a binding instrument on the conservation and sustainable use of marine biological diversity beyond national jurisdiction

The conservation of marine biological diversity has been identified as a crucial issue in need of legal regulation. The UNCLOS does not sufficiently address all issues relevant to viably conserve biological diversity. Legal developments concerning marine genetic resources, area-based management tools such as marine protected areas, environmental impact assessment and capacity building are being discussed as elements of a new implementing agreement. In particular, more precise legal rules concerning marine protected areas beyond national jurisdiction are needed to supplement the frame left by UNCLOS. As concerns the issue of access to genetic resources and the sharing of benefits the UNCLOS regime has gaps because the relevant activities had not been foreseen at the time of the convention's adoption. Divergent views exist as to whether the concept of the common heritage of mankind should be extended to genetic resources.     

海岸破碎带植物消浪数值模拟研究

沿海防浪林能形成柔性的植物消浪体系,可以有效降低风暴潮灾害。由于防浪林消浪效果受波浪、近岸水深及植物等多重因素的影响,消浪机理较为复杂,以往的系统研究成果较少。本文以立面二维自由面紊流模型为工具,建立了基于植物冠层特征的多孔介质模型,精细地模拟了破碎波对植物带的冲击,并与物理模型试验结果进行了对比验证,计算分析了植物带宽度、植物密度、滩地水深等因素对消浪效果的影响。     

Late Holocene Environmental Reconstructions from Lake Solai,Kenya

Playa lake systems tend to be overlooked archives of paleoenvironmental change due to the likelihood of a short and intermittent record of deposition. Groundwater-fed wetlands associated with these climate-sensitive playas, however, preserve changes in hydrologic budget and are thus valuable archives for semiarid regions. This study examines the paleoecological record of a groundwater-fed wetland from Lake Solai, Kenya. Biological proxies are used to reconstruct paleoenvironmental change and climate impacts over the past millennium. Dry conditions persisted between CE 1115 and 1490, followed by wetter conditions during the Little Ice Age. Near surface sediments indicate increasing anthropogenic impact through pastoralism.     

Study on optimization of parameters in a biological model

~lOWThere is a great progreSS tO apply inathernatics m~ in studying marine ~. Because of more Parameters than there that can be speified aCCOrding to the finite dsts, itS parameters had tO be ~hly evaluated in geneal. On the other side, the ~ ~ter fitting in a cendn area is USually unfit in another area for the complication Of ~ iodf.It was lucky that the pwhlerns, how to evalUate the Parameters as ~y as ~ie ina~ with the available dsta and how to judge to what a extent the ParameterS s…