自然资源学报 ›› 2017, Vol. 32 ›› Issue (9): 1482-1494.doi: 10.11849/zrzyxb.20160840

• 资源生态 • 上一篇    下一篇

乡村路网对三峡库区社区水平森林结构的影响

马雪莹1, 邵景安1, 2, *, 徐新良3   

  1. 1. 重庆师范大学地理与旅游学院,重庆400047;
    2. 三峡库区地表过程与环境遥感重庆市重点实验室,重庆 400047;
    3. 资源与环境信息系统国家重点实验室,中国科学院地理科学与资源研究所,北京100101
  • 收稿日期:2016-08-04 修回日期:2016-09-23 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: 邵景安(1976- ),男,汉族,安徽亳州人,博士,研究员,主要从事土地利用与生态过程研究。E-mail:shao_ja2003@sohu.com
  • 作者简介:马雪莹(1991- ),女,汉族,黑龙江双鸭山人,硕士,主要从事土地利用与土地管理研究。E-mail:mxy19910102@sina.com
  • 基金资助:
    国家科技支撑计划课题“长江防护林质量调控与高效经营技术研究与示范”(2015BAD07B04)

The Effects of Rural Roads on Forest Structure at the Community Level in Three Gorges Reservoir Area

MA Xue-ying1, SHAO Jing-an1, 2, XU Xin-liang3   

  1. 1. College of Geographical Science, Chongqing Normal University, Chongqing 400047, China;
    2. Key Laboratory of Land Surface Process and Environment Remote Sensing in the Three Gorges Reservoir Area, Chongqing 400047, China;
    3. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2016-08-04 Revised:2016-09-23 Online:2017-09-20 Published:2017-09-20
  • Supported by:
    National Science and Technology Support Program “Research and Demonstration on the Quality Control and Efficient Management Technology of Construction in the Yangtze River”, No.2015BAD07B04

摘要: 道路作为人为扰动介质被认为是短时空尺度森林景观演化或用途转换的主要驱动力之一,体现为明显的“通道-阻隔”效应。论文以重庆市石柱县西沱镇为例,以3期遥感影像和调研数据为基础,利用ArcGIS的缓冲叠加功能,基于路网动态变化角度,从类型、林龄、起源等主要森林结构方面分析路网变化对森林结构变化的影响。结果表明:1)研究区道路数量先增加后减少,道路质量以等外公路和村级公路的改善为主。2)道路对森林景观干扰性明显。森林从类型、起源、林龄三方面在道路缓冲区内的破碎度均高于非缓冲区内的破碎度。1992—2002年及2002—2014年两个时期相比,前一时期其他灌木林、幼龄林以及萌生林大幅减少,基本表现为道路缓冲区内减少量大于非缓冲区内减少量。后一时期乔木林、中龄林以及萌生林有所增加,其他灌木林和成熟林轻微减少,其中,乔木林在道路缓冲区内增加量大于非缓冲区内增加量,中龄林及萌生林则表现为道路缓冲区内增加量弱于非缓冲区内增加量。3)道路影响域范围内,在无政策性干预条件下,道路的增加和质量的提高很大程度上导致森林景观的退化,低级路段的消失则有助于森林景观的恢复。

关键词: 三峡库区, 森林结构, 社区水平, 乡村路网

Abstract: Road as an artificial disturbance medium is considered as one of the main driving forces of the evolution of forest landscape and the conversion of forest usage at small spatial and temporal scales. It shows obvious “Channel-barrier” effect. Xituo town of Shizhu County in Chongqing city was selected as a research area. We used the buffer and overlay function in ArcGIS based on three phase remote sensing images and servey data to analyze the effects of road evolution on the changes of types, ages and origins of forest landscape. Results showed that: 1) The number of roads firstly increased and then decreased, and the road quality was most improved in substandard roads and village roads. 2) The disturbance of roads on forest landscape is obvious. The fragmentation of forest type, forest age and forest origin was higher in buffer zones of roads than in non-buffer zones of roads. Comparing the two periods of 1992-2002 and 2002-2014, the shrub forest, young forest and coppice forest reduced significantly in the first period, and the reduction were higher in buffer zones of roads than in non-buffer zones of roads. In the latter period, arbor forest, middle and old age forest increased, but shrubs and mature forests slightly reduced, among which the increase of arbor forest in buffer zones of roads was greater than in non-buffer zones of roads and the increase of middle age forest and coppice forest were lower in buffer zones than in non-buffer zones. 3) In the influence area of roads, if there is no intervention of policies, the increase of new roads and the improvement of road quality degraded the forest landscape, while the disappearance of low level roads was benefit to the restoration of forest landscape.

Key words: community level, forest structure, rural road network, Three Gorges Reservoir Area

中图分类号: 

  • Q149