甘肃石羊河湿地景观生态特征及生态建设策略     

兰芳芳  陶雪松 《湿地科学与管理》2014,(3):20-23

分析了甘肃石羊河湿地景观生态的基本特征和变化情况,以维护湿地生物多样性为出发点,以恢复自然生态环境为主要目标,从景观生态学角度,提出甘肃石羊河湿地景现生态建设措施,采用自然恢复和人工修复相结合的湿地生态系统恢复形式,构建多样化动植物栖息生境,维持石羊河湿地生态系统的平衡,从而改善周边地区的生态环境,提升区域环境质量。  相似文献   

生态文明背景下广州市湿地经济发展研究     

徐松浚  徐正春 《湿地科学与管理》2014,(3):39-42

发展广州市湿地经济对改善当地民生、推进生态文明建设具有重要作用。广州市具有丰富的湿地资源,包括湿地水资源、湿地动植物资源和湿地旅游资源。目前广州市湿地经济发展模式主要为水产养殖模式、农业耕种模式、供水蓄能模式和生态旅游模式,但在发展过程中存在过度围垦、河流破坏、过度捕捞和盲目养殖、生态旅游开发不成熟等问题。针对存在的问题,提出以生态优先为原则、以统一规划为前提、以复合农业为重点、以生态旅游为特色的湿地经济发展建议。  相似文献   

湖北省湿地生态旅游资源开发的SWOT分析   总被引：1，自引：1，他引：0  

王留林  罗佳  吴宜进  张永利  刘汉生  王盈晓 《湿地科学与管理》2014,(4):16-19

随着生态旅游的兴起以及旅游业的多元化快速发展,湿地生态旅游逐渐受到人们的关注和亲近。湖北省湿地资源丰富多样,发展湿地生态旅游的条件优越,但在开发湖北湿地生态旅游资源过程中也存在一些问题。在实地调研和查阅相关资料的基础上,认真分析了开发湖北湿地生态旅游资源的优势、劣势、机遇和挑战,为该地区的生态旅游资源开发提供参考。  相似文献   

Challenges and lessons from a wetland LiDAR project: a case study of the Okefenokee Swamp,Georgia, USA     

L. Shea Rose  Jared Ogle  Ed Beute  Jon Indridason  Jacob D. Hall 《国际地球制图》2013,28(3):210-226

Airborne LiDAR (Light Detection and Ranging) provides opportunities to generate high-quality digital elevation models (DEMs) even in wetland environments. Our project, performed over the Okefenokee Swamp in Georgia during the spring of 2010, shows that several, distinctive factors must be considered to ensure successful wetland LiDAR projects. Some of the challenges include selecting optimal flight times in accordance with weather variability and water levels, having effective and quality control protocols, applying and developing filtering and interpolation algorithms, breaklines in swamps and accounting for data striping and noise. While some of these issues are faced in any airborne LiDAR acquisition, many of these require special consideration in a low-slope wetland environment with water saturated soils, widespread shallow water, and sediments and extensive vegetation. An examination of these issues and how they were handled will help in ensuring the success of future LiDAR acquisitions and, in particular, will advance knowledge of producing quality DEMs in wetland environments.  相似文献   

Growth and survival of Halimione portulacoides stem cuttings in heavy metal contaminated soils     

《Marine pollution bulletin》2013,76(1-2):28-32

The halophytic shrub Halimione portulacoides demonstrates a high tolerance to heavy metal contamination and a capacity for accumulating metals within its tissues. On the Iberian Peninsula, this species has colonized habitats with high levels of metal pollution. The aim of this study is to analyze the response of H. portulacoides stem cuttings to this pollution. Growth, photosynthesis and metal uptake were examined in H. portulacoides through an experiment in which stem cuttings were replanted in metal-contaminated soil. This condition decreased growth and lowered both photosynthetic rate and stomatal conductance. Reduced photosynthetic performance was largely due to the reduced concentration of photosynthetic pigments. Despite these responses, there was some important evidence suggesting the phytoremediatory potential of Halimione stem cuttings. The results of our study indicate that this salt-marsh shrub may represent a biotool of value in the restoration of polluted areas.  相似文献   

陕西黄河湿地的鹭林生境与保护     

吴逸群 《湿地科学与管理》2011,7(2):42-43

2010年7月19日～8月5日,在陕西黄河湿地自然保护区发现一处鹭类繁殖地。描述了鹭类繁殖地特征并提出了保护建议。  相似文献   

人工补水条件下白洋淀湿地演变研究   总被引：2，自引：0，他引：2  

王凯霖  李海涛  吴爱民  李木子  周艺  李文鹏 《地球学报》2018,39(5):549-558

近几十年来,在自然因素和人类活动的双重作用下,白洋淀湿地及其周边环境发生了明显变化。本文采用综合识别遥感提取技术,对近40年来白洋淀湿地面积信息进行提取并分析其变化特征,在1986—1989年间,湿地面积增加253.29 km~2;1989—1994年间,湿地面积减少181.61 km~2;1994—1997,湿地面积增加158.17 km~2;1997—2004年间,湿地面积减少170.37 km~2;2004—2016年,湿地面积增加106.09 km~2。根据湿地面积提取结果,分析湿地面积与地表水位和地下水位的关系,确定了白洋淀湿地面积变化的主要控制因子为地表水位,其与白洋淀湿地面积的相关性非常好,相关系数达0.99;白洋淀湿地面积与周边区域的地下水位动态变化呈正相关性,说明湿地渗漏量对周边区域的地下水位动态变化有一定影响。针对白洋淀湿地地表水位,采用水均衡法,分析了影响白洋淀地表水位的主控因素,主要为白洋淀湿地的入淀流量和蒸发蒸腾消耗量。通过白洋淀湿地演变及其影响因素的分析,初步揭示了白洋淀湿地与水文过程的相互影响机制,可为制定白洋淀湿地生态修复和水资源可持续利用方案等提供技术支撑和理论参考。  相似文献   

湿地生态等级补偿机制探讨     

杨楠  张灿明  李锡泉 《湿地科学与管理》2016,(2):48-51

总结了国内外生态补偿的现状以及湖南省目前采取的湿地生态补偿政策,提出了湿地生态等级补偿机制。在建立湿地生态等级评价指标体系的基础上,通过专家打分方法,确定湿地生态等级,以湖南省人均可支配收入中的经营性收入为标准,以行政区域为计算单位,实施湿地等级补偿。  相似文献   

Spatiotemporal wetland changes and their threats in North Central Ethiopian Highlands     

《Singapore journal of tropical geography》2018,39(3):332-350

Wetlands are important environmental resources for rural livelihoods in Ethiopia. The study investigated spatiotemporal change of wetlands, drivers and effects in North Central Ethiopian Highlands. Landsat satellite imageries of 1984, 1993, 2000, and 2013 were used to analyse wetland changes over the last three decades. Practical observations, interviews and discussions with local communities and officers were also conducted to address the main objective. Furthermore, secondary data on crop yields were collected to supplement the primary data. The study shows that wetlands have been converted into built‐up areas and farmlands. Wetlands in the study area experienced annual loss across the entire study period. Consequently, the area size of wetlands decreased from 7.4 per cent in 1984 to 2.6 per cent in 2013. About 66 per cent of the total wetlands was lost within 30 years mainly due to farmland encroachment and urban expansions. The highest rate of wetland change was recorded between 2000 and 2013. Such wetland changes increased conflicts among land users. However, the converted wetlands increased short‐term benefits due to wetland recession agriculture. To conclude, wetland resources are under enormous threats, and challenge the sustainability of livelihoods. Thus, integrated and adaptive wetland restoration policies could improve the degraded wetlands.  相似文献   

Continuous measurement of the depth of water table (inundation) in wetlands with fluctuating surfaces     

Nigel Roulet  Steven Hardill  Neil Comer 《水文研究》1991,5(4):399-403

Assessment of the water table in compressible and/or floating peatland mats requires a remote sensor that can measure simultaneously the elevation of the peat surface and the water level. A simple device, comprising two potentiometers, a float and ‘bog shoe’ was used to measure the water level and peat surface witin 0-3 mm. The water table (depth of water level relative to the peat surface) was then calculated.  相似文献