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冉晨,白晓永,谭秋,罗旭玲,陈欢,习慧鹏.典型喀斯特地区石漠化景观格局对土地利用变化的响应.生态学报,2018,38(24):8901~8910 本文二维码信息
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典型喀斯特地区石漠化景观格局对土地利用变化的响应
Response of landscape pattern of karst rocky desertification to land-use change in a typical karst area
投稿时间:2018-07-23  修订日期:2018-11-21
DOI: 10.5846/stxb201807231576
关键词土地利用  石漠化  景观格局  道真县
Key Wordsland-use  Karst rocky desertification  landscape pattern  Daozhen Country
基金项目国家重点研发计划(2016YFC0502102);中国科学院科技服务网络计划(KFJ-STS-ZDTP-036);"西部之光"人才培养计划(A类)(〔2018〕X);贵州省科技计划(2017-2966)
作者单位E-mail
冉晨 贵州师范大学 地理与环境科学学院, 贵阳 550025
中国科学院地球化学研究所 环境地球化学国家重点实验室, 贵阳 550001 
 
白晓永 中国科学院地球化学研究所 环境地球化学国家重点实验室, 贵阳 550001 baixiaoyong@126.com 
谭秋 贵州师范大学 地理与环境科学学院, 贵阳 550025  
罗旭玲 贵州师范大学 地理与环境科学学院, 贵阳 550025
中国科学院地球化学研究所 环境地球化学国家重点实验室, 贵阳 550001 
 
陈欢 贵州师范大学 地理与环境科学学院, 贵阳 550025
中国科学院地球化学研究所 环境地球化学国家重点实验室, 贵阳 550001 
 
习慧鹏 中国科学院地球化学研究所 环境地球化学国家重点实验室, 贵阳 550001  
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摘要:
土地利用是人类活动最基本的表现形式,探讨石漠化与土地利用变化之间的响应关系,对于石漠化治理和区域的可持续发展是非常重要的。基于贵州道真县2005年、2015年LANDSAT和石漠化数据,再利用ENVI 5.3进行监督分类,将道真县土地利用分为8种类型。通过景观格局空间分析技术和3S技术,对道真县土地利用时空演变和石漠化景观格局进行综合分析,结果表明:(1)2005-2015年间,道真县建设用地和灌木林地面积增加,大部分灌木林地由水田和旱地转化而来,其面积增加了7.51%,建设用地增加了1.30%。(2)近10年间,研究区石漠化等级间的转移表现为轻、中、重度转化为潜在石漠化,其斑块转移面积分别为11.26、38.79、2.71 km2,表明研究区石漠化景观得到了恢复,低等级石漠化斑块面积增加,降低了原有高等级石漠化斑块的优势度。(3)2005-2015年间道真县土地利用和石漠化景观格局,多样性指数分别下降了0.6434和2.4309,均匀度指数各减少了0.0552和0.5436,分维度指数各提高了0.0061和0.0801,蔓延度指数各增加0.1751、25.5396和聚合度指数分别增加1.8688和2.9112,景观形状指数分别减少0.9812和4.536,石漠化景观格局的变化对应土地利用景观格局指数的变化,随着人们土地利用方式的改变,石漠化也发生相应的改变。通过该研究的进行,有助于提高人们对石漠化和土地利用景观格局的认识,基于景观生态学背景对石漠化治理成效进行评估,为之后的石漠化治理工作的进行及研究提供了参考。
Abstract:
Land-use is the most basic manifestation of human activities. It is essential to explore the response relationship between Karst Rocky Desertification (KRD) and land-use change for the control of KRD and regional sustainable development. Based on LANDSAT and KRD data from 2005 and 2015 in Daozhen County of Guizhou Province, the land-use in Daozhen County was classified into 8 types by ENVI5.3. The spatial and temporal evolution of land use and landscape pattern of KRD in Daozhen County were analyzed using landscape pattern spatial analysis and 3S technology. The results showed that:(1) During 2005-2015, the area of construction land and shrubbery land increased; most shrubbery land was transformed from paddy fields and dry land, and the area increased by 7.51%. Construction land increased by 1.30%. (2) Over the 10 study years, the metastasis between the rocky desertification grades in the study area exhibited light, medium, and severe conversion into potential rocky desertification. The plaque transfer areas were 11.26 km2, 38.79 km2, and 2.71 km2, respectively, indicating a rocky desertification landscape in the study area. The land has been restored, and the area of low-grade rocky desertification plaques has increased, which reduced the superiority of the original high-grade rocky desertification patches; (3) Landscape patterns of land-use and KRD in Daozhen County decreased by 0.6434 and 2.4309 in 2005 and 2015. The evenness index decreased by 0.0552 and 0.5436, the fractal dimension index increased by 0.0061 and 0.0801, the contagion index increased by 0.1751, 25.5396, and the aggregation index increased by 1.8688 and 2.9112, respectively, and the landscape shape index decreased by 0.9812 and 4.536, respectively. The change in the landscape pattern index of land use corresponded to the change in the landscape pattern of KRD. With change of land-use patterns, the contagion index increased by 0.1751, 25.5396, and 2.9112, respectively. The KRD changed accordingly. This study will help to improve people's understanding of KRD and land-use landscape patterns. Based on the landscape ecology background, the effect of KRD control was evaluated, which will provide a reference for future research regarding KRD control.
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