The interplay between plant communities and soil properties response to litter manipulation shape soil bacterial community composition in an alpine meadow

IF 4.8 2区农林科学 Q1 SOIL SCIENCE

Applied Soil Ecology Pub Date : 2025-06-18 DOI:10.1016/j.apsoil.2025.106265

Zhouwen Ma , Lan Li , Yingxin Wang , Qingping Zhou , Xinquan Zhang , Fujiang Hou

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引用次数: 0

Abstract

Soil bacterial communities play a vital role in biogeochemical cycles and the sustainable functioning of grassland ecosystems. Plant community characteristics, such as species diversity, asynchrony, and ground cover, interact with soil resource availability, including temperature, moisture balance, and nutrient cycling, to influence soil community structure. However, the mechanisms by which plant litter regulates bacterial communities through plant-soil interactions remain largely underexplored. We examined the response of soil bacterial community composition to a three-year experiment that added varying litter masses (0, 200, and 400 g m⁻²) of three litter species (Elymus nutans, Kobresia setchwanensis, and Ligularia virgaurea) in an alpine meadow. Our findings showed that L. virgaurea and K. setchwanensis litter at 200 and 400 g m⁻² significantly shifted soil bacterial community composition, although soil bacterial diversity was unaffected. Soil bacterial community composition was significantly correlated with soil and plant characteristics, as well as their interactions. Further analysis revealed that changes in soil bacterial communities were indirectly driven by shifts in soil available nitrogen and soil moisture. These changes were mediated by alterations in plant community coverage induced by litter manipulation. Additionally, changes in plant species asynchrony-either directly through litter-induced effects on soil available phosphorus and plant diversity or indirectly via increased soil pH-played a role in regulating bacterial community composition under litter manipulation. This study concludes that litter-induced interactions between plant communities and soil properties are important drivers of the soil bacterial community composition, and provides insights into cascading effects in plant-soil-bacterial interactions that support multiple ecosystem functions in alpine meadows.

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凋落物处理下植物群落与土壤性质的相互作用影响了高寒草甸土壤细菌群落组成

土壤细菌群落在草地生态系统的生物地球化学循环和可持续功能中起着至关重要的作用。植物群落特征，如物种多样性、非同步性和地被覆盖，与土壤资源有效性（包括温度、水分平衡和养分循环）相互作用，影响土壤群落结构。然而，植物凋落物通过植物-土壤相互作用调节细菌群落的机制仍未得到充分探索。在一项为期三年的实验中，我们研究了在高寒草甸中添加三种凋落物（Elymus nutans， Kobresia setchwanensis和Ligularia virgaurea）不同凋落物质量（0,200和400 g m−2）对土壤细菌群落组成的响应。结果表明，200和400 g m−2凋落物显著改变了土壤细菌群落组成，但土壤细菌多样性未受影响。土壤细菌群落组成与土壤和植物特征及其相互作用呈显著相关。进一步分析表明，土壤有效氮和土壤水分的变化间接驱动了土壤细菌群落的变化。这些变化是由凋落物处理引起的植物群落盖度变化介导的。此外，凋落物对土壤速效磷和植物多样性的直接影响或土壤ph的间接增加都可能导致植物种类的不同步变化，从而在凋落物处理下调节细菌群落组成。本研究认为，凋落物诱导的植物群落与土壤性质之间的相互作用是土壤细菌群落组成的重要驱动因素，并为支持高寒草甸多种生态系统功能的植物-土壤-细菌相互作用的级联效应提供了新的见解。

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来源期刊

Applied Soil Ecology 农林科学-土壤科学

CiteScore

9.70

自引率

4.20%

发文量

363

审稿时长

5.3 months

期刊介绍： Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.