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Plant community legacy effects on nutrient cycling, fungal decomposer communities and decomposition in a temperate grassland
Soil Biology and Biochemistry ( IF 9.7 ) Pub Date : 2021-10-01 , DOI: 10.1016/j.soilbio.2021.108450
Renske Jongen 1 , S. Emilia Hannula 1 , Jonathan R. De Long 1 , Robin Heinen 1, 2 , Martine Huberty 1, 2 , Katja Steinauer 1 , T. Martijn Bezemer 1, 2
Affiliation  

Soil legacies mediated by plant species-specific microbial communities are major drivers of plant community dynamics. Most soil legacy studies focus on the role of pathogens and mutualists in driving these processes, while much less is known about plant litter-mediated changes to the soil microbial community. Here, we used an existing plant-soil feedback field experiment in which plant communities with different growth strategies (i.e., fast versus slow) and different proportions of functional groups (i.e., grasses versus forbs) were allowed to condition the soil over contrasting temporal scales (i.e., one versus two years) in a natural grassland. In the feedback phase, we removed the existent plant community, and replaced it with a standardized response plant community. We then tested the legacy effects of these different soil conditioning treatments on decomposition processes, nutrient cycling and soil decomposer community composition. Soil legacy effects on decomposition and the soil decomposer community composition were most evident right after the start of the feedback phase, but disappeared soon after the new community established. The soil conditioning time and years since disturbance affected most of the soil functions consistently, while no strong effects of plant functional group and plant growth strategy were found. We conclude that after disturbance, it is recovery time, not soil legacy effects, that is the most important factor driving soil functions.



中文翻译:

植物群落遗产对温带草原养分循环、真菌分解者群落和分解的影响

由植物物种特异性微生物群落介导的土壤遗产是植物群落动态的主要驱动力。大多数土壤遗产研究侧重于病原体和共生者在推动这些过程中的作用,而对植物凋落物介导的土壤微生物群落变化知之甚少。在这里,我们使用了现有的植物-土壤反馈现场实验,其中允许具有不同生长策略(即快速与慢速)和不同功能群比例(即禾本科植物与杂草)的植物群落在对比时间尺度上调节土壤(即,一年对两年)在天然草原上。在反馈阶段,我们移除了现有的植物群落,取而代之的是标准化的响应植物群落。然后,我们测试了这些不同土壤调理处理对分解过程、养分循环和土壤分解者群落组成的遗留影响。土壤遗留对分解和土壤分解者群落组成的影响在反馈阶段开始后最为明显,但在新群落建立后不久就消失了。土壤调理时间和扰动后的年数一致地影响了大部分土壤功能,而没有发现植物功能群和植物生长策略的强烈影响。我们得出的结论是,在扰动之后,是恢复时间,而不是土壤遗留效应,这是驱动土壤功能的最重要因素。土壤遗留对分解和土壤分解者群落组成的影响在反馈阶段开始后最为明显,但在新群落建立后不久就消失了。土壤调理时间和自扰动以来的年数一致地影响了大部分土壤功能,而没有发现植物功能群和植物生长策略的强烈影响。我们得出的结论是,在扰动之后,是恢复时间,而不是土壤遗留效应,这是驱动土壤功能的最重要因素。土壤遗留对分解和土壤分解者群落组成的影响在反馈阶段开始后最为明显,但在新群落建立后不久就消失了。土壤调理时间和自扰动以来的年数一致地影响了大部分土壤功能,而没有发现植物功能群和植物生长策略的强烈影响。我们得出的结论是,在扰动之后,是恢复时间,而不是土壤遗留效应,这是驱动土壤功能的最重要因素。而没有发现植物功能组和植物生长策略的强烈影响。我们得出的结论是,在扰动之后,是恢复时间,而不是土壤遗留效应,这是驱动土壤功能的最重要因素。而没有发现植物功能组和植物生长策略的强烈影响。我们得出的结论是,在扰动之后,是恢复时间,而不是土壤遗留效应,这是驱动土壤功能的最重要因素。

更新日期:2021-10-12
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