干旱区生态环境知识资源中心(Arid): 科尔沁沙质草地生物量积累过程对降水变化的响应模拟

Arid

	科尔沁沙质草地生物量积累过程对降水变化的响应模拟
其他题名	Simulating the response of biomass accumulation process in semi-arid grassland to changes in precipitation
	王明明; 刘新平; 何玉惠; 魏静; 车力木格; 孙姗姗
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:11 页码:3656-3665
中文摘要	科尔沁沙地是中国北方严重的沙漠化区域之一,理解其沙质草地生物量积累对降水变化的响应有利于该区域的生态恢复和后续经营管理。在植被-土壤水分耦合模型的基础上结合植被阈值-迟滞响应模式(T-D),在点尺度上模拟科尔沁沙质草地生长季植被生物量积累过程对降水变化的响应。结果表明(1)植被生物量积累对降水量变化表现出明显的非线性响应。降水量增加,促进植被生物量积累,反之则抑制生物量积累,但在同等程度的降水量变化下生物量积累对降水增加的响应远大于对降水量减少的响应。(2)生物量积累对降水频率变化的响应与单次有效降水量变化在干旱年和湿润年都显著正相关,但与累计有效降水量相关性微弱,而与有效降水间隔变化只在干旱年显著相关,表明在不同年份间降水频率变化实际上通过改变单次有效降水量和有效降水间隔来影响生物量的积累。(3)生物量积累过程对降水频率变化存在明显的响应阈值,但该阈值在不同的降水量和降水特征下并不相同。科尔沁沙质草地植被生物量积累过程对降水变化有明显的响应,植被-土壤水分耦合模拟与T-D模型的结合能有效地在日尺度上识别这种响应,这为探究植被和降水关系提供了新工具。
英文摘要	Horqin Sandy Land is one of the serious desertification areas in north China.Understanding the response of the sandy grassland biomass accumulation to precipitation changes is beneficial to the ecological restoration and ecosystem management for this area.In our study,we simulated the response of vegetation biomass accumulation process to precipitation change in the growing season of Horqin sandy grassland on point scale by combining the vegetation-soil water coupling model and the vegetation Threshold-Delay response model(T-D) .The results revealed that(1) the accumulation of vegetation biomass was improved with the increase of precipitation,and otherwise inhibited with the decrease of precipitation.However,under the same degree of change in precipitation,the response of biomass accumulation to the increase of precipitation was far greater than the response to the decrease of precipitation,which revealed that there was a significant nonlinear responding relationship between the accumulation of vegetation biomass and the change in precipitation.(2) The response of biomass accumulation to change in precipitation frequency was significantly positively correlated with the change of single effective precipitation in both dry year and wet year,weakly correlated with the change of cumulative effective precipitation,and significantly correlated with change in effective precipitation interval only in dry years.This result showed that the change of precipitation frequency in different precipitation years actually affects the accumulation of biomass by changing the single effective precipitation and effective precipitation interval.(3) Vegetation biomass accumulation process had obvious response threshold to precipitation frequency change,and this response thresholds were different under different precipitation amount and precipitation characteristics.In all,there was obvious response of biomass accumulation to precipitation change,and the combination of vegetation-soil moisture coupling process model and T-D model can effectively identify this response on daily scale,which provided a new tool for exploring the relationship between vegetation and precipitation.
中文关键词	半干旱沙质草地 ; 生物量积累 ; 降水变化 ; 响应 ; 模型模拟
英文关键词	semi-arid sandy grassland biomass accumulation precipitation change response simulation
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6739089
来源机构	中国科学院西北生态环境资源研究院 ; 北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336547
作者单位	王明明, 中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院奈曼沙漠化研究站;;, 兰州;;, ;;北京 730000;;100049.; 车力木格, 中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院奈曼沙漠化研究站;;, 兰州;;, ;;北京 730000;;100049.; 孙姗姗, 中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院奈曼沙漠化研究站;;, 兰州;;, ;;北京 730000;;100049.; 刘新平, 中国科学院西北生态环境资源研究院;;中国科学院西北生态环境资源研究院, 中国科学院奈曼沙漠化研究站;;中国科学院乌拉特荒漠草原研究站, 兰州;;兰州, ;; 730000;;730000.; 何玉惠, 中国科学院西北生态环境资源研究院, 中国科学院皋兰生态与农业综合研究站, 兰州, 甘肃 730000, 中国.; 魏静, 北京大学深圳研究生院, 人居环境科学与技术国家级重点实验室, 深圳, 广东 518000, 中国.
推荐引用方式 GB/T 7714	王明明,刘新平,何玉惠,等. 科尔沁沙质草地生物量积累过程对降水变化的响应模拟[J]. 中国科学院西北生态环境资源研究院, 北京大学,2020,40(11):3656-3665.
APA	王明明,刘新平,何玉惠,魏静,车力木格,&孙姗姗.(2020).科尔沁沙质草地生物量积累过程对降水变化的响应模拟.生态学报,40(11),3656-3665.
MLA	王明明,et al."科尔沁沙质草地生物量积累过程对降水变化的响应模拟".生态学报 40.11(2020):3656-3665.