Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (5): 1053-1060.DOI: 10.11733/j.issn.1007-0435.2021.05.022

Previous Articles     Next Articles

Relationship between Plant Community Diversity and Ecosystem Multifunctionality During Alpine Meadow Degradation

WANG Xiao-fen1, MA Yuan2, ZHANG Ge-fei3, LIN Dong1, ZHANG De-gang1   

  1. 1. College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    2. Qinghai Academy of Animal and Veterinary Sciences, Qinghai University, Xining, Qinghai Province 810016, China;
    3. North Institute of Eco-Environment and Resources, CAS, Lanzhou, Gansu Province 730070, China
  • Received:2021-02-03 Revised:2021-03-23 Online:2021-05-15 Published:2021-06-02

高寒草甸退化阶段植物群落多样性与系统多功能性的联系

王晓芬1, 马源2, 张格非3, 林栋1, 张德罡1   

  1. 1. 甘肃农业大学草业学院, 甘肃 兰州 730070;
    2. 青海大学畜牧兽医科学院, 青海 西宁 810016;
    3. 中国科学院西北生态资源研究院, 甘肃 兰州 730070
  • 通讯作者: 张德罡,E-mail:zhangdg@gsau.edu.cn
  • 作者简介:王晓芬(1983-)，女，甘肃民勤人，实验师，博士研究生，主要从事草地生态方向的研究，E-mail：wangxf@gsau.edu.cn
  • 基金资助:
    甘肃省草原技术推广总站“草原生态状况评价技术规范研究”（034-036272）；甘肃省草原技术推广总站“中国草原分类系统在甘肃草原普查中的耦合研究”（034-036237）；国家自然科学基金面上基金“干旱荒漠区降水变化对植物正相互作用的影响机制”（41771551）；甘肃省自然科学基金“祁连山高寒草地土壤微生物群落结构功能与碳沉积的耦合关系研究”（20JR10RA525）共同资助

PDF

Abstract: The system functions of alpine grasslands in terms of carbon storage,productivity,nutrient cycling,and water conservation are closely related to the community biodiversity. However,most studies at this stage have been conducted only on the relationship between a few or single ecosystem functions and community diversity. Based on this,this study used redundancy analysis and factor analysis to evaluate the multifunctionality of degraded alpine meadow communities on the eastern edge of the Qinghai-Tibet Plateau and to explore the relationship between the multifunctionality of grassland ecosystems and plant community diversity. The results showed that the multifunctional evaluation indexes with the increase of grassland degradation were ND(86.61)>MD(25.86)>LD(23.98)>SD(-7.51);the multifunctionality of grassland ecosystem was significantly and positively correlated with Margalef index,and significantly correlated with Pielou index and Shannon-Wiener index. The distribution and community structure of degraded alpine meadows were mainly influenced by functional soil indicators such as BP,SMC,CMC and AP,but not affected by pH,C∶N and Ext-P. In summary,vegetation degradation in alpine meadows regions had a significant impact on ecosystem multifunctionality,which provided a certain theoretical basis and important reference value for further research on the multifunctionality of alpine meadows and the rational conservation and utilization of grasslands.

Key words: Alpine meadow, Grassland degradation, Species diversity, Ecosystem function, Redundancy analysis

摘要： 高寒草地在碳储量、生产力、养分循环以及涵养水源等方面的系统功能与群落生物多样性紧密相关，但现阶段大多数研究仅从少数的或单一生态系统功能与群落多样性之间的关系展开。基于此，本研究采用冗余分析和因子分析对青藏高原东缘退化高寒草甸群落进行了多功能性评价，探讨草地生态系统多功能性与植物群落多样性之间的关系。结果表明：随草地退化程度加剧，土壤多功能评价指标表现为未退化（86.61）>中度退化（25.86）>轻度退化（23.98）>极度退化（-7.51）；草地生态系统多功能性与Margalef丰富度成显著正相关关系，与Pielou均匀度指数和Shannon-Wiener指数呈显著负相关关系；退化高寒草甸植物的分布和群落结构的变化主要受到土壤总孔隙度、土壤含水量、毛管持水量和通气孔隙度等土壤功能性状的影响。综上所述，高寒地区植被退化对于生态系统的多功能性影响显著，本研究为进一步研究高寒草甸多功能性及合理保护和利用草地提供一定的理论依据和参考价值。

关键词: 高寒草甸, 草地退化, 多样性, 生态系统功能, 冗余分析

CLC Number: