自然资源学报 ›› 2019, Vol. 34 ›› Issue (12): 2504-2515.doi: 10.31497/zrzyxb.20191202

• 湿地专栏 • 上一篇    下一篇

潮沟对黄河三角洲湿地典型景观格局的影响

于小娟1,2(), 薛振山2, 张仲胜2(), 宋晓林2, 张红日1   

  1. 1. 山东科技大学测绘科学与工程学院,青岛 266590
    2. 中国科学院东北地理与农业生态研究所,长春 130102
  • 收稿日期:2019-06-10 修回日期:2019-10-08 出版日期:2019-12-28 发布日期:2019-12-28
  • 作者简介:

    作者简介:于小娟(1992- ),女,江苏徐州人,硕士,研究方向为水文连通响应。E-mail: yxjke02@163.com

  • 基金资助:
    国家重点研发计划项目(2017YFC0505901);国家自然科学基金项目(41771103,41671081,41671087)

Impacts of tidal channels on typical landscapes of wetland in the Yellow River Delta

YU Xiao-juan1,2(), XUE Zhen-shan2, ZHANG Zhong-sheng2(), SONG Xiao-lin2, ZHANG Hong-ri1   

  1. 1. College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
    2. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
  • Received:2019-06-10 Revised:2019-10-08 Online:2019-12-28 Published:2019-12-28

摘要:

为揭示潮沟发育对黄河三角洲典型湿地景观类型空间分布格局的影响,通过对1989-2016年黄河三角洲7期遥感影像进行目视解译,在获取潮沟及湿地景观类型空间分布基础上,通过冗余分析识别影响黄河三角洲典型湿地景观特征的主要潮沟指标。结果表明:光滩面积占比的变化趋势与芦苇(Phragmites australis)、碱蓬(Suaeda salsa)相反;黄河三角洲北部区域湿地景观的斑块密度整体上大于南部,景观破碎化程度相对较高;RDA结果显示前两个排序轴能够解释潮沟发育指标与景观格局指数关系的85.7%,较好地反映了两者的相关关系;潮沟长度、数量、网络连通度和曲率对区域景观格局的影响程度较大;潮沟分维值对景观格局影响程度最小;潮沟长度、数量、分维值与芦苇和碱蓬的面积占比及斑块密度呈负相关关系,与光滩面积占比呈正相关关系。

关键词: 潮沟发育, 景观格局, 冗余分析, 黄河三角洲

Abstract:

Tidal channels play important roles in governing landscape succession in the estuary areas. In the present work, tidal channels and landscapes types of the Yellow River Delta (YRD) were extracted by visual interpretation based on remote sensing images combined with field investigation during 1989-2016, aiming to decipher effects of tidal channel development on Phragmites australis, Suaeda salsa and mudflats in the last 20 years through Redundancy Analysis (RDA). Results indicated that area ratio of mudflats was in the fluctuation of increase and decrease during the past 20 years, and the change trend is opposite to that of Phragmites australis and Suaeda salsa. Patch density was larger in the Northern YRD than that in the Southern YRD, and fragmentation is relatively high. RDA analysis showed that the first two sequence axes could explain about 85.7% variations of landscape indexes, which better reflected the correlation between the two. Length, number, network connectivity and curvature had greater effects on landscape features; the effect of fractal dimension was the smallest. Length, number, and fractal dimension were negatively correlated with the area ratio and patch density of Phragmites australis and Suaeda salsa while they were positively correlated with the area ratio of mudflats.

Key words: tidal channels, landscapes, RDA, Yellow River Delta