Use of localized descriptive statistics for exploring the spatial pattern changes of bird species richness at multiple scales     

Zhihai MaBenjamin Zuckerberg  William F. PorterLianjun Zhang 《Applied geography (Sevenoaks, England)》2012,32(2):185-194

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版纳勐养保护区鸟类及人为影响分析   总被引：1，自引：0，他引：1  

王直军  贾知行 《云南地理环境研究》1994,6(1):78-83

切实保护和利用好西双版纳现存热带森林，是急需处理的现实问题。本文通过勐养自然保护区鸟类调查结果，揭示了西双版纳保护区管理现状。多数地区实际上未管理起来，林区居民仍滥用自然资源，对鸟类的猎捕从未停止，有的地方颇为严重；从生物多样性着眼，环境质量在下降。现已管理起来的三岔河保护区，尽管旅游开放后尚存许多问题亟待探索和改进，但鸟类保护状况已明显改善，说明自然保护区旅游在科学管理下才是可行的。就此，本文分析、评价了勐养保护区鸟类受人为影响情况，对自然保护区管理工作提出建议。  相似文献   

New approaches to integrated quality assessment of lakeshores     

Wolfgang Ostendorp   《Limnologica》2004,34(1-2):160

The EU Water Framework Directive (WFD) requires the ecological assessment of water bodies. Since the littoral zones and the lakeshores are part of lakes as water bodies as defined by the WFD, a new scheme for ecological quality assessment of lakeshores should be established. It is proposed that this scheme should go beyond the formal requirements of the WFD, as it includes aspects of nature conservancy, landscape protection, and regional planning and development. Some of these aspects are subject to other EU legislation (e.g. Habitats Directive) and some are subject to national legislation. Ten general Quality Elements (QEs) are proposed, which can be refined and reified through several levels of detail, depending on the specific aims of a study. A list of eleven topics, which should be discussed in the establishment of the lakeshore quality assessment scheme, is given. The more complex ones are the implementation of other EU legislation, the definition of lakeshore types and reference conditions, the stipulation of best aggregation procedures, and a better understanding of the significance of hydrological and morphological impacts on the biota.  相似文献   

Quick Bird影像处理及其在东大滩地表破裂带研究中的应用     

杨智翔  苗放  叶成名  梁军 《测绘与空间地理信息》2006,29(5):111-114

以Qu ick B ird全色和多光谱影像为数据源,通过波段组合、HIS变换融合使处理后图像达到分辨率高而且接近真彩色,具有良好的识别效果;利用野外采集的6个高精度的GPS地面控制点对影像进行二次多项式几何精校正;利用校正后的影像对东大滩地表破裂带进行了应用性研究,结果表明:在空气稀薄、气候寒冷、野外考察条件极其艰苦的东大滩,通过0.61 m分辨率的Qu ick B ird影像可以较形象、直观、真实地反映东大滩破裂带的几何特征和形态特征。  相似文献   

利用Quick Bird影像制作1∶2000地形图的探讨   总被引：1，自引：0，他引：1  

刘景波  王承志  郭德华 《测绘与空间地理信息》2008,31(2):111-113

介绍了研究利用分辨率为0.61 m的4波段融合Quick Bird卫星正射影像制作1∶2000比例尺图的可行性。重点考察是否能满足1∶2000比例尺图的精度及成图质量。  相似文献   

基于高分辨率Quick Bird影像的数字正射影像图的制作     

王利英  宋伟东 《测绘与空间地理信息》2006,29(4):68-71

与线划图相比,遥感影像正射图有很多线划图无法比拟的优点,因此它在城市规划、土地管理、铁路、公路选线等方面有着特殊的应用。以某市Qu ick B ird遥感数据为例,介绍了从原始卫星影像图的收集到在ERDAS遥感图像处理软件中进行遥感影像正射图制作的方法和步骤。描述了正射影像图制作中的融合、纠正等的流程及原理。实践证明遥感卫星数据时效性好、覆盖范围大、成本相对低廉。因此利用商业化的遥感图像处理软件直接对遥感卫星图像产品进行正射纠正,继而制作系列正射影像图,是一条效果良好的技术路线。  相似文献   

海岸带生境破坏影响因素及整治修复策略研究          下载免费PDF全文

唐迎迎  高瑜  毋瑾超  任海波  金信飞 《海洋开发与管理》2018,35(9):57-61

海岸带是海陆交汇的地带,也是海洋资源富集区和海洋经济发展的重要基础。海岸带生态系统具有十分重要的经济和生态服务功能,是生态系统平衡的脆弱地带,但目前由于气候变化、生物入侵、海洋污染和人为开发活动等因素,其生境出现退化。文章简述了我国海岸带生境破坏的主要因素,总结国内外海岸带研究与管理,并给出了海岸带整治修复的技术策略,为整治修复工程项目的更好开展提供依据参考,从而促进海岸带的可持续利用,推动沿海地区海洋经济发展和海洋生态文明建设。  相似文献   

长江中下游安庆沿江湖泊湿地夏季鸟类多样性调查   总被引：3，自引：3，他引：0  

宫蕾  张黎黎  周立志  顾长明  朱文中 《湖泊科学》2013,25(6):872-882

湖泊湿地是鸟类的重要栖息地,湖泊湿地鸟类是湖泊生态系统重要的监测生物,湖泊湿地鸟类多样性及其影响因素的研究对湿地管理具有重要意义.2011年7-8月,采用样线法对长江中下游安庆沿江7个湖泊湿地的夏季鸟类资源进行了调查,以期为湖泊湿地资源管理提供依据.共记录到安庆沿江湖泊湿地鸟类14目35科82种,其中留鸟27种(占32.9%),夏候鸟37种(占45.1%);水鸟28种(占34.6%);肉食性、食虫和杂食性鸟类占多数,分别占30.5%、30.5%和23.2%;须浮鸥、夜鹭、丝光椋鸟、黑脸噪鹛、树麻雀、家燕等6种鸟类为优势种.物种数以黄大湖最高(50种),白荡湖和破罡湖最低(各28种);Shannon-Wiener指数以黄大湖最高(2.123),白荡湖最低(1.918);均匀度指数以龙感湖最高(0.865),菜子湖最低(0.739).进一步分析显示,鸟类物种数、多样性指数与湖泊面积呈显著正相关,鸟类物种数、多样性指数与干扰强度呈显著负相关.采取退田还湖、恢复湿地等途径增加湿地面积、生境类型和植被资源对于保护湖泊湿地的鸟类资源具有积极意义.  相似文献   

Approaches to classifying benthic habitat quality     

H.M. Tillin  S.I. Rogers  C.L.J. Frid 《Marine Policy》2008

Implementing ecosystem-based management requires methods of assessing the quality of habitats to deliver the high-level objective of achieving healthy ecosystems. ‘Habitat’ has been interpreted in different ways and this has confused the debate over which attributes constitute ‘quality’. Three definitions of quality for habitats are advanced: ‘species’, ‘reference’ and ‘functional’ . Operational measures associated with these are evaluated in terms of their utility to deliver policy objectives. It is concluded that functional definitions/measures of quality are most appropriate to deliver ecosystem-based management although measures of species and reference quality may support assessment of the functional quality of habitats.  相似文献   

Habitats and taphonomy of Europa     

Jere H. Lipps  Sarah Rieboldt 《Icarus》2005,177(2):515-527

Jupiter's moon Europa possesses an icy shell kilometers thick that may overlie a briny ocean. The inferred presence of water, tidal and volcanic energy, and nutrients suggests that Europa is potentially inhabited by some kind of life; indeed Europa is a primary target in the search for life in the Solar System although no evidence yet exists for any kind of life. The thickness of the icy crust would impose limits on life, but at least 15 broad kinds of habitats seem possible for Europa. They include several on the sea floor, at least 3 in the water column, and many in the ice itself. All of these habitats are in, or could be transported to, the icy shell where they could be exposed by geologic activity or impacts so they might be explored from the surface or orbit by future planetary missions. Taphonomic processes that transport, preserve, and expose habitats include buoyant ice removing bottom habitats and sediment to the underside of the ice, water currents depositing components of water column habitats on the ice bottom, cryovolcanoes depositing water on the surface, tidal pumping bringing water column and ice habitats to the near-surface ice, and subice freezing and diapiric action incorporating water column and bottom ice habitats into the lower parts of the icy shell. The preserved habitats could be exposed at or near the surface of Europa chiefly in newly-formed ice, tilted or rotated ice blocks, ridge debris, surface deposits, fault scarps, the sides of domes and pits, and impact craters and ejecta. Future exploration of Europa for life must consider careful targeting of sites where habitats are most likely preserved or exist close to the surface.  相似文献