花坪自然保护区不同生境类型夏季鸟类多样性分析

2005年7～8月,采用样线法在广西花坪国家级自然保护区对原生林、次生林、农田-经济林三种生境类型的夏季鸟类群落进行调查,以Shannon-wiener指数、Pielou指数、优势度指数、G-F指数分析鸟类的多样性。结果共记录到鸟类66种,隶属7目29科。原生林的鸟类物种数、物种多样性及G-F指数最高,该群落的鸟类在物种和科属水平上拥有最高的多样性,但是个体数量较少。次生林的鸟类群落密度最高,但是数量集中在几种少数优势种上,多样性指数低。农田-经济林的Pielou指数最高,鸟类群落结构合理、分布均匀、多样性高。保持各类生境空间结构和分布格局,提高植物群落的复杂性,对鸟类多样性及其生存和繁衍有着重要影响。     

白银库伦自然保护区春季鸟类多样性研究

2005年和2006年的3～5月对内蒙古白银库伦自然保护区6种不同生境的鸟类进行了调查研究.共记录到鸟类67种,隶属于9目23科.其中繁殖鸟类57种(留鸟和夏候鸟),国家级重点保护鸟类有11种.根据鸟类的多样性指数、均匀性指数、优势度和相似性系数等群落特征参数对不同生境中的鸟类多样性与生境的关系进行分析,结果表明:保护区内鸟类群落结构与各生境类型内部的空间异质性程度密切相关,生境的空间结构越复杂,则鸟类群落多样性就越高;明水面鸟类群落多样性最高,芨芨草草甸的多样性指数最低}五蕊柳沼泽地鸟类群落的均匀度指数最高,典型草原的最低;各鸟类群落问的相似性指数均较低,表现出各生境鸟类群落结构差异较大;并结合保护区的现状及发展提出保护对策.     

锡林河湿地鸟类群落多样性研究

2005～2006年,采用固定半径样点法和样线法对锡林河湿地4种生境的鸟类资源进行了调查,共记录到鸟类97种,隶属于12目33科．研究了不同生境类型中鸟类群落的多样性、均匀度、丰富度、优势度及群落问的相似性等特征．结果显示：沼泽区的鸟类群落多样性指数最高,明水区次之,草地最低．沼泽区和明水区鸟类群落间的相似性最高．     

贵州省云台山鸟类群落特征

2011年9月～2012年8月,同时采用样线法、样点法和网捕法对贵州省云台山的鸟类进行了调查.共记录到鸟类11目33科94种,国家二级保护鸟类4种,鸫科和画眉科鸟类种类最多,画眉科和鹎科鸟类数量最多,优势种为灰眶雀鹛(Alcippe morrisonia)和栗耳凤鹛(Yuhinacastaniceps).比较季节之间鸟类群落的种类、数量、Shannon-Weiner指数(H)、Simpson指数(D)和Pielou Index指数(J),结果表明:春季鸟类种类最多,D值和J值最低;夏季鸟类数量最少,H值、D值、J值均最高;冬季鸟类数量最多,种类和H值最低.Sorenson相似性系数最高为春季—秋季鸟类群落,最低为夏季—冬季鸟类群落;Bray-Curtis指数最高为夏季—冬季鸟类群落,最低为秋季—冬季鸟类群落.云台山鸟类受人为干扰不大,但很可能受到我国气候带北移等自然因素的影响.     

玉林市区春季鸟类群落结构及多样性研究

2007年3月～5月,对玉林市交通占地、公园、校园、居民区进行鸟类的调查.初步记录到鸟类14种364只,隶属1目9科12属.结果表明:不同鸟类栖息地中分布的鸟类的数量、种类、多样性、均匀度、丰富度均有明显差异.校园和公园的鸟类种类和数量最多,群落特征指数高,而交通占地的鸟类种类较少,群落特征指数低.校园和公园、校园和居民区的鸟类群落最为相似.     

Anlayse of Avifauna Composition and Avian Community Structure of Ulanhot in Inner Mongolia

2007年8月至2008年7月对内蒙古乌兰浩特市鸟类区系组成及群落结构进行了调查研究.全年共记录到鸟类114种,隶属于15目37科,其中繁殖鸟有81种,非繁殖鸟有33种.繁殖鸟中北方种类占优势.分析了不同季节,不同生境中鸟类群落结构的特征,结果显示秋季鸟类的多样性指数与均匀度指数最高,优势度最低.不同生境中鸟类的群落组成也有所不同.     

内蒙古乌兰浩特市鸟类区系组成及群落结构分析

2007年8月至2008年7月对内蒙古乌兰浩特市鸟类区系组成及群落结构进行了调查研究.全年共记录到鸟类114种,隶属于15目37科,其中繁殖鸟有81种,非繁殖鸟有33种.繁殖鸟中北方种类占优势.分析了不同季节,不同生境中鸟类群落结构的特征,结果显示秋季鸟类的多样性指数与均匀度指数最高,优势度最低.不同生境中鸟类的群落组成也有所不同.     

吉林省左家自然保护区鸟类组成及其多样性研究

对吉林省左家自然保护区40年来鸟类组成的动态变化及变化原因进行了分析.结果表明,至2006年全区共见鸟类190种,隶属于17日、49科、103属,其中繁殖鸟(夏候鸟和留鸟)113种,占全区鸟类种数的59.5%.记录到国家二级保护种类30种;吉林省二级保护种类12种、三级保护种类21种.按照鸟类栖息的生境及植被特点,将自然保护区分为4个不同类型的群落,并对每个群落的多样性、均匀性及相似性进行了比较.其中次生林群落多样性指数最高(2.980),均匀性指数也最高(0.611);次生群落与灌丛群落的相似性指数相对高一些,为0.339.     

甘肃冷龙岭夏季鸟类群落结构调查

1984—1985年5—7月我们对甘肃冷龙岭地区夏季5个鸟类群结构及其相关因素进行了调查研究.共收集鸟类43种,隶于4目、15科,其中雀形目鸟类占86%.混交林群落多样性指数最高,2.49.草甸鸟类群落多样性指数最低,0.52;亚高山灌丛鸟类群落均匀性最高,0.883,草甸鸟类群落最低,0.474;现存生物量阔叶林鸟类群落最高,725.8克/公顷,混交林最低,142.9克/公顷.繁殖鸟群落多样性指数除与群落中种的多少,相依植物群落层次相关外,与环境所能提供的可利用的生态位的多样性直线相关.     

湖北三潭风景区改造对夏季鸟类群落组成及多样性的影响

2012、2013和2015年夏季,对湖北三潭风景区鸟类群落及多样性进行了调查.结果表明,该景区夏季分布鸟类66种,隶属11目31科.鸟类多样性指数为1.464,均匀度指数为0.884.鸟类种类年间变化不明显,但鸟类数量有减少的趋势.尽管总的鸟类种类与景区改造前变化不大,但每年到景区繁殖的鸟类种数有明显减少,说明景区大型的改造工程对鸟类群落组成和多样性造成一定的负面影响.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~     

An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.