草业学报 ›› 2023, Vol. 32 ›› Issue (3): 1-12.DOI: 10.11686/cyxb2022125
• 研究论文 •
雷石龙1(), 廖李容2,3, 王杰1, 张路2,3, 叶振城1, 刘国彬2, 张超1()
收稿日期:
2022-03-18
修回日期:
2022-04-20
出版日期:
2023-03-20
发布日期:
2022-12-30
通讯作者:
张超
作者简介:
E-mail: zhangchaolynn@163.com基金资助:
Shi-long LEI1(), Li-rong LIAO2,3, Jie WANG1, Lu ZHANG2,3, Zhen-cheng YE1, Guo-bin LIU2, Chao ZHANG1()
Received:
2022-03-18
Revised:
2022-04-20
Online:
2023-03-20
Published:
2022-12-30
Contact:
Chao ZHANG
摘要:
植物群落多样性及稳定性对草地生态系统功能的稳定发挥至关重要。本研究以青藏高原高寒湿地草甸、高寒草甸、高寒草原和高寒荒漠草原为研究对象,基于480个野外样方调查及实验分析,运用显著性分析、回归分析和结构方程模型等方法,探究不同草地类型植物多样性与稳定性之间关系及其影响因素。结果表明:高寒草原植物多样性显著高于其他3种草地类型;高寒草甸群落稳定性最高。高寒草地中,不同的物种多样性指标与群落稳定性的关系不同,4种草地类型均匀度与群落稳定性显著负相关;高寒草甸和高寒荒漠草原中Shannon-Wiener多样性与群落稳定性显著负相关,在高寒湿地草甸和高寒草原中丰富度与稳定性显著正相关。降水量是影响高寒草地植物多样性和群落稳定性的主要因素,土壤有机碳、pH以及铵态氮含量也能通过影响植物多样性进而影响群落稳定性。综上,在高寒草地生态系统的管理过程中,需充分考虑气候和土壤因子的变化,根据草地类型制定不同的管理措施。
雷石龙, 廖李容, 王杰, 张路, 叶振城, 刘国彬, 张超. 高寒草地植物多样性与Godron群落稳定性关系及其环境驱动因素[J]. 草业学报, 2023, 32(3): 1-12.
Shi-long LEI, Li-rong LIAO, Jie WANG, Lu ZHANG, Zhen-cheng YE, Guo-bin LIU, Chao ZHANG. The diversity-Godron stability relationship of alpine grassland and its environmental drivers[J]. Acta Prataculturae Sinica, 2023, 32(3): 1-12.
图2 不同草地类型植被群落特征、多样性和稳定性不同字母表示不同草地类型间差异显著(P<0.05),下同。Different letters indicate significant differences among different regions(P<0.05), the same below.
Fig.2 Vegetation community,diversity and stability characteristics of different grassland types
图4 不同草地植被群落功能群地上生物量和物种数相对比例
Fig.4 Relative proportions of aboveground biomass and species number in functional communities of different grassland vegetation communities
图5 不同草地类型间环境因子的差异·代表异常值Present abnormal value. MAP:年均降水量 Mean annual precipitation;NH4+-N:铵态氮 Ammonium nitrogen;TP:全磷 Total phosphorus;SOC:土壤有机碳 Soil organic carbon. 下同The same below.
Fig.5 Differences of environmental factors among different grassland types
图7 高寒草地植物多样性和群落稳定性驱动因素实线和虚线分别表示正作用和负作用,箭头的宽度与作用强度呈正比,箭头上的数字是标准化路径系数,***,P<0.001;**,P<0.01;*,P<0.05。J:Pielou均匀度指数 Pielou evenness index;G:Godron稳定性指数 Godron stability index.The solid line and the dotted line represent the positive and negative effects respectively. The width of the arrow is proportional to the action intensity. The number on the arrow is the standardized path coefficient.
Fig.7 Driving mechanism of plant diversity and community stability in alpine grassland
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