干旱区生态环境知识资源中心(Arid): 2000-2010年陕西北部不同类型草地面积及其覆盖度变化

Arid

	2000-2010年陕西北部不同类型草地面积及其覆盖度变化
其他题名	Changes in different grassland types and their vegetation coverage in northern Shaanxi Province during 2000-2010
	马琪 1; 刘康 2; 涂纯 3; 贺成民 4; 袁家根 5
来源期刊	植物科学学报
ISSN	2095-0837
出版年	2018
卷号	36 期号:1 页码:54-64
中文摘要	利用生态系统分类及生态参量数据产品,运用植被覆盖度年际变异系数、趋势斜率和退化指数等草地覆盖度变化状况评价指标,对陕西北部重大生态建设工程实施关键年份(2000-2010年)内各类型草地植被覆盖度的演替状况进行研究。结果显示:(1)延安市和榆林市的黄土沟壑区草地生态系统面积明显增加,年均植被覆盖度由2000年的27.94%增长到2010年的40.50%,草地覆盖度整体由低覆盖向中覆盖等级转变,其中温带草原和温性草丛覆盖度呈明显上升趋势。(2)陕西北部大部分草地覆盖度波动变化明显,延河以北温带草原稳定性低,延河以南温性草丛稳定性较高、波动变化较小;93.98%的草地区域覆盖度呈上升趋势,其中极显著上升区域主要分布在黄土沟壑区;3.23%的降低区域集中于榆林市西北部的温带荒漠草原分布区。(3)11年间,陕西北部退化草地得到改善恢复的面积由2000-2005年期间的9594.44 km~2增加到2005-2010年期间的26 544.39 km~2,远大于退化区域,草地极重度退化程度得到扭转。本研究表明陕西北部不同类型草地覆盖度均不同程度得到了缓解和改善。
英文摘要	We investigated variability of vegetation coverage across different grassland types in key years (2000-2010) of major ecological construction projects in northern Shaanxi Province. Products of ecosystem classification and ecological parameter data were utilized to systematically elaborate succession processes, combined with several evaluation indexes, including inter-annual variation coefficient, trending slope, and degradation index. Our results showed that: (1) There was an obvious increase in area of grassland ecosystem in the loess gully region in Yanan and Yulin City with annual average vegetation coverage from 27.94% in 2000 to 40.50% in 2010. Grassland coverage increased from a low to moderate level, accompanied with a significant uptrend in temperate steppe and warm-temperate tussock coverage. (2) Most of the grassland coverage in the northern Shaanxi regions changed obviously (increasing grassland accounted for 93.98%). The grassland ecosystem showed relatively significant fluctuations in the north of Yanhe River, but remained relatively steady in the south of the river. The significant increase in grassland vegetation coverage was mainly in the hilly loess regions, with the main decrease area located in the temperate desert steppe region of the northwest of Yulin. (3) Over the 11 years, the degree of severe degradation of grassland has been reversed in northern Shaanxi (from 9594.44 km~2 during 2000-2005 to 26 544.39 km~2 during 2005-2010). This study suggests that grassland coverage across different grassland types in northern Shaanxi have improved to varying degrees.
中文关键词	草地生态系统 ; 植被覆盖度 ; 生态建设工程 ; 陕西北部
英文关键词	Grassland ecosystem Vegetation coverage Ecological construction projects Northern Shaanxi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6194762
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238616
作者单位	1.西北大学城市与环境学院;;陕西省环境科学研究院, ;;, 西安;;西安, ;; 710127;;710061; 2.西北大学城市与环境学院, 西安, 陕西 710127, 中国; 3.中国地质科学院岩溶地质研究所, 国土资源部岩溶生态系统与石漠化治理重点实验室, 桂林, 广西 541004, 中国; 4.陕西省水文水资源勘测局, 西安, 陕西 710068, 中国; 5.陕西省环境科学研究院, 西安, 陕西 710061, 中国
推荐引用方式 GB/T 7714	马琪,刘康,涂纯,等. 2000-2010年陕西北部不同类型草地面积及其覆盖度变化[J],2018,36(1):54-64.
APA	马琪,刘康,涂纯,贺成民,&袁家根.(2018).2000-2010年陕西北部不同类型草地面积及其覆盖度变化.植物科学学报,36(1),54-64.
MLA	马琪,et al."2000-2010年陕西北部不同类型草地面积及其覆盖度变化".植物科学学报 36.1(2018):54-64.