干旱区生态环境知识资源中心(Arid): 新疆草地优势种植物相对生物量沿海拔梯度变化特征

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	新疆草地优势种植物相对生物量沿海拔梯度变化特征
其他题名	Changes of relationships between dominant species and their relative biomass along elevational gradients in Xinjiang grasslands
	马婧婧; 刘耘华; 盛建东; 李宁; 武红旗; 贾宏涛; 孙宗玖; 程军回
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:8 页码:25-35
中文摘要	优势种作为草地生态系统中地上生物量的主要贡献者,其生物量既受到环境因素的影响,也受到共存种种间关系的影响。然而,由于物种的不同和环境梯度的差异,目前有关优势种生物量与环境因素关系的研究,尚未获得一致性的结论。基于此,本研究以2011-2013年对新疆9种草地类型397个样地中优势种相对生物量的调查数据为基础,首先统计了不同草地类型中优势种组成,其次通过一般线性模型分析了优势种相对生物量随海拔梯度变化特征,以及共存优势种相对生物量之间的关系。结果显示:1)新疆草地共有169个优势种,隶属31科120属。这些优势种主要以禾本科植物为主,占据了优势种的19.53%。其中,高寒草原、温性草甸草原、温性草原、温性荒漠草原和温性草原化荒漠中,最主要的优势种均为针茅。而在高寒草甸、山地草甸和温性荒漠中,最主要的优势种则分别为珠芽蓼、千叶蓍和角果藜;2)优势种相对生物量与海拔的关系可以归为5类,分别呈现无显著关系、先降低后升高的U型变化趋势、显著正相关关系、显著负相关关系和先增加后降低的单峰型关系。这5类关系所对应的优势种数量分别为50、9、8、6和4个,分别占优势种总数的64.9%、11.7%、10.4%、7.8%和5.2%;3)24个共存优势种之间,其相对生物量共存在19对显著关系,且大多数共存优势种相对生物量之间主要表现为负相关关系。本研究表明,优势种相对生物量与海拔的关系,因物种不同呈多种变化格局且受到共存优势种的影响,结果可对未来新疆草地地上生物量的维持和管理,提供一定的参考依据。
英文摘要	In grassland,dominant species make a major contribution to aboveground biomass. A large number of studies have shown that biomass of dominant species is regulated both by environmental factors and by interspecific relationships among coexisting species. However,our current understanding about relationships between biomass of dominant species and environmental factors remains incomplete for many species and environmental conditions. To address this knowledge gap,this study investigated relative biomass(RB)of dominant species among 9 grassland types across 397 sites in Xinjiang grassland during 2011-2013. Firstly,we evaluated community composition for each grassland type and identified dominant species. Secondly,we explored relationships between RB of dominant species and elevation as well as linkage of RB among coexising dominant species using a general linear model. Our results showed that:1)A total of 169 dominant species,which belong to 120 genera and 31 families,were identified in Xinjiang grasslands,with 19.53% of dominant species belonging to the Poaceae. In particular,Stipa capillata was the most important dominant species for alpine steppe,temperate meadow steppe,temperate steppe desert, temperate steppe and temperate desert steppe, while Polygonum viviparum, Achillea millefolium, and Ceratocarpus arenarius were the most important dominant species for alpine meadow,mountain meadow and temperate desert,respectively. 2)Relationships between RB of dominant species and elevation could be classified into the following five groups:no significant relationship,a U pattern(decreased initially and then increased with increasing elevation),a significant positive relationship,a significant negative relationship and an arch-shaped pattern (increased initially and then decreased). These five behavioral groups comprised,respectively,50(64.9%),9 (11.7%),8 (10.4%),6 (7.8%) and 4 (5.2%) of dominant species. 3) A total of 19 significant paired relationships were found involving 24 dominant species coexisting with another species. Most coexisting dominant species pairs were negatively correlated with each other in terms of their RB. These findings demonstrated that previous results indicating a varied relationship between biomass of dominant species and elevation were not conflicting. Rather different patterns concurrently exist in Xinjiang grassland driven by variation between sites in species behavior. Our findings highlight the importance of dominant species and interspecific relationships among coexisting dominant species in biomass conservation and management in Xinjiang grasslands.
中文关键词	优势种 ; 地上生物量 ; 海拔 ; 共存物种 ; 新疆草地
英文关键词	dominant species aboveground biomass elevation coexisting species Xinjiang grasslands
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7030132
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377525
作者单位	马婧婧, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 刘耘华, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 盛建东, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 李宁, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 武红旗, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 贾宏涛, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 孙宗玖, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.; 程军回, 新疆农业大学草业与环境科学学院;;新疆土壤与植物生态过程重点实验室, ;;新疆土壤与植物生态过程重点实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830052;;830052, 中国.
推荐引用方式 GB/T 7714	马婧婧,刘耘华,盛建东,等. 新疆草地优势种植物相对生物量沿海拔梯度变化特征[J],2021,30(8):25-35.
APA	马婧婧.,刘耘华.,盛建东.,李宁.,武红旗.,...&程军回.(2021).新疆草地优势种植物相对生物量沿海拔梯度变化特征.草业学报,30(8),25-35.
MLA	马婧婧,et al."新疆草地优势种植物相对生物量沿海拔梯度变化特征".草业学报 30.8(2021):25-35.