陕北黄土高原景观动态的植被覆盖季节响应

doi:10.11821/xb200502013

地理学报 ›› 2005, Vol. 60 ›› Issue (2): 299-308.doi: 10.11821/xb200502013

陕北黄土高原景观动态的植被覆盖季节响应

李正国, 王仰麟, 张小飞

北京大学环境学院, 北京 100871

收稿日期:2004-06-09 修回日期:2004-12-27 出版日期:2005-03-25 发布日期:2005-03-25
通讯作者: 王仰麟, E-mail: ylwang@urban.pku.edu.cn
作者简介:李正国 (1980-), 男, 博士研究生, 主要研究方向为景观生态学。 E-mail: lzg.123@263.net
基金资助:
国家自然科学基金重大研究计划项目 (90102018)

Landscape Dynamics and Vegetation Cover Seasonal Response in Loess Plateau of Northern Shaanxi

LI Zhengguo, WANG Yanglin, ZHANG Xiaofei

College of Environmental Sciences, Peking University, Beijing 100871, China

Received:2004-06-09 Revised:2004-12-27 Online:2005-03-25 Published:2005-03-25
Supported by:
Key Project of National Natural Science Foundation of China, No.90102018

摘要/Abstract

摘要：

半干旱地区生态环境状态与景观动态变化息息相关,为深入探讨景观动态的生态响应,本研究选择陕北黄土高原为研究区,分别就景观动态的3种类型 (景观类型间变化、类型内组分变化及未变化) 与植被覆盖状态进行分析。其中植被覆盖状态主要通过植被覆盖值高低及年内植被恢复期、维持期与转折点等曲线特征体现。结果发现研究区景观类型的动态变化并不显著,而各动态类型与植被覆盖的相关程度各不相同,植被覆盖不仅和景观类型有关,亦与景观动态类型有关,而在植被覆盖对景观动态的响应上,则体现出由于景观动态类型的差异,造成同一景观类型的植被覆盖季节响应模式和强度完全不同。

关键词: 植被覆盖, 景观动态, 黄土高原

Abstract:

The ecological condition is closely linked with landscape dynamics in the semi-arid area. In order to discuss ecological response of landscape dynamics, this paper chooses Loess Plateau of northern Shaanxi as a study area and analyses the relationship between Normalized Difference Vegetation Index (NDVI) time series of one year and landscape dynamics that consist of various landscape types and the components of landscape types. The result of NDVI estimation is obtained based on smooth curve characteristics such as growing season, peak season, the length of NDVI high period and low period, and maximum or minimum values.Spatial analysis methods can be used to obtain the distribution of landscape change. However, it is not enough to understand the interaction of landscape dynamics and regional ecological response. So we need to further study landscape dynamics by enhancing its resolution. Because the varieties of landscape types are not distinct enough to define in the study area, the study attempted to quantify the relationship between the components of landscape types and NDVI. According to the correlation analysis, we found that the curve style and relativity of NDVI and landscape are complex, landscape types could respond to the degree of NDVI at regional scale, but that also needs to integrate landscape dynamic types in drainage scale. In order to optimize landscape pattern by understanding the characteristics of landscape pattern and dynamics in the Loess Plateau exactly and its ecological response, this paper suggests enhancing basic data definition in temporal and spatial scales.

Key words: vegetation cover, landscape dynamics, Loess Plateau

李正国, 王仰麟, 张小飞. 陕北黄土高原景观动态的植被覆盖季节响应[J]. 地理学报, 2005, 60(2): 299-308.

LI Zhengguo, WANG Yanglin, ZHANG Xiaofei. Landscape Dynamics and Vegetation Cover Seasonal Response in Loess Plateau of Northern Shaanxi[J]. Acta Geographica Sinica, 2005, 60(2): 299-308.

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陕北黄土高原景观动态的植被覆盖季节响应

Landscape Dynamics and Vegetation Cover Seasonal Response in Loess Plateau of Northern Shaanxi

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