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• W4233314151 abstract "PDF HTML阅读 XML下载 导出引用 引用提醒 长白山国家级自然保护区植被时空变化及其驱动因子 DOI: 10.5846/stxb201410192053 作者: 作者单位: 北京林业大学;环境保护部南京环境科学研究所,北京林业大学;环境保护部南京环境科学研究所,北京林业大学 作者简介: 通讯作者: 中图分类号: 基金项目: 林业公益性行业科研专项经费项目(201104029);中央级公益性科研院所基本科研业务专项(2015) Spatio-temporal variation of vegetation and analysis of its driving factors in Changbai Mountain National Nature Reserve Author: Affiliation: Beijing Forestry University;Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection,,Beijing Forestry University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:基于MODIS NDVI数据,采用一元线性回归趋势分析和相关系数检验法对长白山国家级保护区2000-2010年间植被时空变化及其驱动因子进行研究。结果表明:10年来,长白山国家级自然保护区中88.95%的植被保持稳定,9.71%的植被显著改善,1.34%的植被显著退化,植被的总体保护效果较好。从植被变化的驱动因子来看,气温对植被的影响略强于降雨,气温和降雨与植被变化的关系总体上都呈负相关,但显著相关的面积均不足8%,10年间气温和降雨对自然保护区内植被的影响总体有限。自然保护区内不同地形上的植被变化存在一定空间差异,海拔1800 m以上,坡度26°-35°范围内的岳桦林和苔原植被出现较明显退化。自然保护区内规模日益扩大的旅游活动以及不合理的开发建设与部分植被的退化有一定关系。尽管自然保护区内植被显著退化的面积仅占1.34%,但必须引起管理部门的高度重视。据此,提出三点建议以更有效地保护现有植被和恢复已退化植被,为长白山国家级自然保护区的科学管理提供参考。 Abstract:Vegetation status reflects the quality of regional environment, and vegetation assessment plays a crucial role in the assessment of ecological changes. As the main component of nature reserves (NRs), vegetation provides an important habitat for wild plants and animal; thus, the vegetation status in NRs is closely related to the survival conditions of the wildlife. Furthermore, vegetation changes can reflect the interaction between natural and anthropogenic activities. Accordingly, analysis of vegetation changes and their magnitude can help to assess the efficacy of conservation in a nature reserve. At the same time, examining the vegetation changes and exploring their driving factors are of great importance for the conservation and management of NRs. Changbai Mountain National Nature Reserve (CMNR) is one of the earliest nature reserves established in China. Its biodiversity is high with 9 species of amphibians, 12 species of reptiles, 24 species of fish, 56 species of mammals, 230 species of birds, and 1255 species of insects. It is also home to 430 species of fungi, 200 species of lichens, 311 species of mosses and liverworts, 78 species of ferns, 11 species of gymnosperms, and 1325 species of angiosperms. This paper aimed to identify the extent of changes in vegetation cover between 2000 and 2010 in order to better protect the vegetation in CMNR. Based on the normalized difference vegetation index data provided by the Moderate Resolution Imaging Spectroradiometer, we examined the temporal and spatial variation of vegetation and its driver during the last 10 years, using methods of monadic linear regression trend analysis and correlation coefficient test. Results showed that in CMNR most of the vegetation, accounting for 88.95%, was stable in the past 10 years, 9.71% of the total area of vegetation improved significantly, and only 1.34% of vegetation degraded significantly, suggesting that the vegetation conservation in the reserve was successful overall. When considering the driving factors of vegetation variation, the proportion of vegetation that changed was significantly correlated with the temperature and it was slightly larger than the proportion of vegetation significantly affected by the precipitation, indicating that temperature have a slightly greater effect on vegetation than precipitation. Both factors were negatively correlated with vegetation changes, but the area with significant correlation for both factors was less than 8%. In general, the influence of temperature and precipitation on vegetation was limited. The change in vegetation cover in CMNR was different on different terrains, i.e., vegetation degradation was enhanced with the increase of altitude and slope. Especially, Betula ermanii forest and tundra distributed in the area more than 1800 m above sea level and within the scope of slope from 26 to 35° were degraded significantly. Beside the topography factors, growing tourism and unregulated development and construction have also affected the degradation of the part of vegetation in CMNR. Although only 1.34% of vegetation is degraded significantly in CMNR, great attention should be given by relevant administrative departments. Therefore, in order to protect the existing vegetation more effectively and restore the degraded vegetation, as well as provide references for scientific management of CMNR, we have provided three suggestions:(1) to build tundra protection facilities in touristic regions within the tundra in order to strictly limit the expansion of touristic activities; (2) to speed up restoration of the degraded Betula ermanii forest and tundra with artificial stimulation measures; and (3) to block or change the course of No. 302 provincial road crossing the nature reserve in southern slope. 参考文献 相似文献 引证文献" @default.
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• W4233314151 title "Spatio-temporal variation of vegetation and analysis of its driving factors in Changbai Mountain National Nature Reserve" @default.
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