浅谈影响林木资产价值的环境因子数据挖掘

林木资产价值评价,只针对林木资产本身的价值来核算,忽略了直接影响林木资产价值的森林环境因子.为了准确地认识环境因子与林木资产价值间的关系,为森林生产经营提供客观科学的依据,研究以内蒙古旺业甸林场小班样地调查数据和DEM数据为基础,运用数据挖掘技术研究分析了11项典型的环境因子与林木资产价值间的相互关系.得到了环境因子对林木资产价值影响程度的强弱序列以及环境因子与林木资产价值的关联网络.实验结果表明环境因子对林木资产价值有极显著的影响.研究为林木资产价值评价提供了客观依据和决策支持.     

风光旖旎的莲花湖地质公园

莲花湖地质公园以峰水为主体，构成公园地貌的骨架，园区内莲花湖主要沿牡丹江河谷分布，是东北最大的人工湖泊，是典型的水体景观。园区内古老的花岗岩形成的地貌景观最为完整典型，具有极高的观赏价值和地质地貌的科研价值，是典型的科研教学基地。     

一部具有理论意义和应用价值的科学论著——评《海岛生态修复与环境保护》

<正>海岛是捍卫国家权益、保障国防安全的战略前沿,是保护海洋环境、维护生态平衡的重要平台,是进行海洋科学试验和研究的重要区域,是壮大海洋经济、拓展发展空间的重要依托,具有非常重要的政治意义、军事价值、社会价值、经济价值、生态价值和科研价值。与此同时,由于地理隔离、恶劣自然环境的作用和土壤的贫瘠以及淡水资源的缺乏等影响。海     

基于公共空间价值建构的社区规划——以广州北京街3个传统社区为例

在公共空间价值研究中,社会行动理论提出基于“场域”空间结构化的社会行动研究框架,并为公共空间价值建构提供了实践论方法。在西方国家出现的公共空间价值危机背景下,社区逐渐成为构建公共空间价值的重要载体,社区规划因其社会行动本质,逐步成为重构社区公共空间价值的重要手段。目前我国社区规划的实践作为城市规划制度体系框架之下的局部探索创新,很难适应公民社会背景下不断成长的社区行动需要。本文借鉴新制度主义理论,以广州市北京街盐运西、流水井、龙藏3个传统文化社区为实证研究对象,从“组织”和“场域”两个分析视角,探讨社区运行空间构建和社区振兴行动方法,试图搭建我国面向公共空间价值需求的社区规划体系。研究显示,上述社区在商业文化的冲击下,面临着社区异质性加深、社区资本降低、社区行动障碍等问题,建设更包容开放、更有活力的可持续社区则成为社区居民的普遍愿望和需求。     

读《李春芬地理文选》有感

春芬教授几十年来一直是我很敬重的一位老学长，我爱读其文，爱听其讲，敬爱其人。六十年代前期、读到李老的名著《南美洲地理环境的结构》。过了近三十年之后，又读到李老的力作《北美洲地理环境的结构》一书。读了被称为世界区域地理“李氏姊姐篇”的这两本佳作，使我对区域地理的学术价值和研究方法论获得前所未有的肯定和认识。     

《海洋测绘》荣获“第二届全国优秀测绘期刊提名奖”

近日,在中国测绘学会举办的全国优秀测绘期评选活动中,海军海洋测绘研究所主办的《海洋测绘》荣获"第二届全国优秀测绘期刊提名奖"。近年来,《海洋测绘》作为展示我国海洋测绘事业科技发展成果的平台和窗口,一直致力于海洋测绘技术领域最新科研成果的跟踪报道,学术水平、     

基于虚拟土理念的中国耕地资源价值核算初探

在经济高速发展带来土地资源日趋紧张的形势下,深化对耕地资源价值的认识,有助于实现耕地资源空间布局优化和耕地市场化流转.该文在明确虚拟土内涵与类型划分的基础上,从经济、社会和生态价值属性出发,运用收益还原法、替代法等方法,以省级为单位,分别测算了中国产能虚拟土、资源虚拟土和生态虚拟土价值,通过SPSS聚类分析和GIS空间分析,从虚拟土角度分析我国耕地资源价值的空间分布差异.研究结果表明,产能虚拟土得分最高的广东省是得分最低的内蒙古自治区的8.94倍;资源虚拟土得分最高的上海市是得分最低的黑龙江省的96.10倍;生态虚拟土得分最高的上海市是得分最低的贵州省的9.25倍.在空间分布上,产能虚拟土与纬度气候带分布基本一致,资源虚拟土分布受经济影响较大,而生态虚拟土分布则受气候和经济因素共同作用.     

Remote sensing of ecosystem services: An opportunity for spatially explicit assessment

Ecosystem service is an emerging concept that grows to be a hot research area in ecology. Spatially explicit ecosystem service values are important for ecosystem service management. However, it is difficult to quantify ecosystem services. Remote sensing provides images covering Earth surface, which by nature are spatially explicit. Thus, remote sensing can be useful for quantitative assessment of ecosystem services. This paper reviews spatially explicit ecosystem service studies conducted in ecology and remote sensing in order to find out how remote sensing can be used for ecosystem service assessment. Several important areas considered include land cover, biodiversity, and carbon, water and soil related ecosystem services. We found that remote sensing can be used for ecosystem service assessment in three different ways: direct monitoring, indirect monitoring, and combined use with ecosystem models. Some plant and water related ecosystem services can be directly monitored by remote sensing. Most commonly, remote sensing can provide surrogate information on plant and soil characteristics in an ecosystem. For ecosystem process related ecosystem services, remote sensing can help measure spatially explicit parameters. We conclude that acquiring good in-situ measurements and selecting appropriate remote sensor data in terms of resolution are critical for accurate assessment of ecosystem services.     

一张地图的动机

<正>八十年前外国人眼中的北京什么样?近日从一张此前收藏界未披露的非常有趣的老地图中,我得以窥见其一。该图名为     

Valuation of lake and marsh wetlands ecosystem services in China

Wetlands are highly productive natural ecosystems, providing valuable goods and services. There is growing interest in transferring ecosystem service value from the existing wetlands studied to other wetlands ecosystems at a large geographic scale. The benefit transfer method uses the known values from wetlands to predict the value of other wetland sites. This methodology requires only limited time and resources. The present study calculated the value of the ecological services provided by lake and marsh wetlands in China in terms of biodiversity indices, water quality indices and economic indices. Basic data on wetlands were obtained through remote sensing images. The results show that: 1) The total ecosystem service value of the lake and marsh wetlands in 2008 was calculated to be 8.1841 × 1010 United States Dollars(USD), with the marsh and lake wetlands contributing 5.6329 × 1010 and 2.5512 × 1010 USD, respectively. Values of marsh ecosystem service were concentrated in Heilongjiang Province(2.5516 × 1010 USD), Qinghai Province(1.2014 × 1010 USD), and Inner Mongolia Autonomous Region(1.1884 × 1010 USD). The value of the lakes were concentrated in Tibet Autonomous Region(6.223 × 109 USD), Heilongjiang(5.810 × 109 USD), and Qinghai(5.500 × 109 USD). 2) Waste treatment and climate regulation services contributed to 26.29% and 24.74% respectively, of the total ecosystem service value of the marsh wetlands. Hydrological regulation and waste treatment contributed to 41.39% and 32.75%, respectively, of the total ecosystem service value of the lake wetlands. 3) The total ecological service value of the lake and marsh wetlands was 54.64% of the total service value of natural grassland ecosystems and 30.34% of the total service value of forests ecosystems in China.