基于Land TM和ETM+的北川河流域土地利用研究

根据北川河流域2000年ETM+、1994年和2007年TM共三期遥感影像数据,在RS和GIS技术支持下,分析了研究区土地利用的数量变化和空间变化特征,明确了土地利用变化的主要类型和方向,探讨了土地利用变化的过程,并进行了土地利用变化的景观格局分析.结果显示:该流域土地利用以草地和耕地为主,1994-2007年耕地大面积减少,主要转化为草地和林地;耕地和未利用地朝着规模缩小的方向发展,林地、水域和建设用地朝着规模增加的方向发展,草地变化缓慢;随着时间的推移和经济的发展,各种景观的多样性、破碎度、优势度和分离度发生了不均匀较为复杂的变化,各种景观形态的复杂程度排序为:建设用地>林地>草地>未利用地>水域>耕地.     

A new species of Friesea (Collembola: Neanuridae) from the Antarctic Continent

A new species of Friesea was found in East Antarctica and is described here as Friesea eureka sp. nov. This is the first new collembolan species to be described from the Antarctic continent in 30 years, even though ice-free areas have been intensively surveyed over that time. It brings to five the number of described species of the genus Friesea known from the Antarctic continent and Peninsula, so is the most speciose genus of Collembola in the region. However, one of these, F. grisea Schäffer, comprises a number of cryptic species of different molecular lineages. The new species is distinguished by having 4 + 4 ocelli plus 1 + 1 hardly visible, a very reduced furca, up to four or five faintly clavate tenent hairs, four anal spines and four spinose chaetae in adult. The restricted distribution of the species emphasises the importance of protecting ice-free areas on the continent as they often contain at least one locally endemic faunal species

www.zoobank.org/urn:lsid:zoobank.org:pub:865B9AE6-0428-4364-99A4-AF38A764D6D9     

Biodiversity and biogeography of non-marine Mollusca on the islands of the Southern Ocean

There are no terrestrial and freshwater molluscs associated with Continental nor Maritime Antarctica. The malacofaunas of the cool-temperate and sub-Antarctic islands of the Southern Ocean are extremely depauperate, comprising a mere 68 site-records of 51 species from 27 genera in 13 families. The South Atlantic records are confined to the Falkland Islands, which harbour nine species (one bivalve, five pond snails and three terrestrial aliens), and South Georgia, where there is one Notodiscus sp. (Charopidae). The fauna of the South Indian Ocean islands of Prince Edward, Crozet, Kerguelen and Heard, comprises two alien slugs and endemic Notodiscus hookeri (Charopidae). The majority of species occur on the South Pacific Ocean Islands of Macquarie, Campbell, Auckland, Snares, Antipodes, Bounty and Chatham to the south and east of New Zealand. The Chatham fauna is dissimilar to that on the other South Pacific Islands, though both represent vicariant remnants of common South Pacific Is./New Zealand Athoracophoridae, Charopidae and Punctidae. There is, other than the broad South Indian Ocean distribution of Notodiscus hookeri, little evidence of Holocene dispersal and colonization. Indeed the Southern Ocean is an effective barrier and the different regional (South Atlantic/Indian/Pacific) faunas are principally vicariant and derived from local survivors of Pleistocene glaciation.     

哈尔滨市区土地资源的可持续利用问题及对策分析

哈尔滨市土地资源的可持续利用是区域社会经济可持续发展的重要基础和根本保证．     

科尔沁沙地小叶锦鸡儿对土壤有机碳积累的影响

通过田间小区取样,研究了科尔沁沙地小叶锦鸡儿（Caragana microphylla）人工固沙林0～50cm土层在0、5、10、22年的时间序列上土壤有机碳动态。结果表明,各层次土壤有机碳含量和储量随小叶锦鸡儿种植年限的增加而增加。小叶锦鸡儿5年处理与0年处理在0～50cm深度有机碳储量差异不显著;5～10年处理土壤有机碳储量快速增加,10-22年处理增加速度相对趋缓。土壤有机碳动态变化的研究结果表明,种植小叶锦鸡儿人工林是科尔沁沙地生态系统恢复重建的一项切实可行的林业工程措施。     

新时期新形势下土地整理的新视野

在进入21世纪的今天,如何科学有效地开展土地整理,是一个十分重要而紧迫的问题。文章在简要分析我国当前土地整理中存在问题的基础上,提出了土地整理的新视野,对于进一步开展土地整理工作,加快实现土地资源的可持续利用具有重要意义。     

基于遥感影像制作土地利用现状图的方法研究

以长白山为例,探讨了以RS遥感影像TM为数据源与1∶50000地形图相结合,并用GPS辅助外业调绘,最后在MAPINFO下制作土地利用现状图的流程及方法。并对结果进行了分析和评价,为吉林省长白山市利用3S高新技术进行土地利用现状调查奠定了基础,也为土地更新调查提供了新的途径和方法,提高了工作效率,节省了人力物力。     

欲望书写与情感支点——论贺享雍长篇小说《土地神》的情感选择

贺享雍在长篇小说《土地神》中一改往日凝重、写实的叙述策略，以恢谐幽默的手法，将农村的单纯与复杂，简约而不简单地展现出来，传递出他对乡村基层干部与百姓的生存欲望与生存困境的思考。不过，作品显露出的创作意图与创作实践及阅读接受间的不平衡现象，以及欲望书写难以摆脱的功利化、世俗化、非理性的艺术倾向，值得我们认真思索。     

城市交通与土地利用协调度模型研究

基于系统论的复合系统理论,结合系统协调度的本质意义,构建了城市交通-土地利用复合系统的距离协调度模型,并依此提出一种定量评价城市交通与土地利用系统协调度的新方法。本文通过对南京都市区进行实证分析,得出南京市城市交通与土地利用复合系统协调度呈凸曲线发展趋势。