Plant diversity effects on soil microorganisms support the singular hypothesis
Plant diversity effects on soil microorganisms support the singular hypothesis
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DOI：
10.1890/08-2338.1
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发表时间：
2010-02-01
期刊：
影响因子：
4.8
通讯作者：
Scheu, S.
中科院分区：
文献类型：
--
作者：
Eisenhauer, N.;Bessler, H.;Scheu, S.
全球生物多样性的下降引起了人们对生态系统功能和服务后果的担忧。尽管由土壤微生物驱动的生态系统功能（例如植物生产力、分解和养分循环）特别重要，但人们对植物多样性与土壤微生物之间的相互关系知之甚少。我们在六年的实验草地系统中分析了土壤微生物对植物物种丰富度 (1-60) 和植物功能群丰富度 (1-4) 变化的响应。为了探索多样性效应的机制，考虑了主要的非生物和生物因素。此外，在添加常量营养素后评估微生物生长特征。植物多样性石油的影响 土壤微生物在最多样化的植物群落中最为明显，尽管差异是在四年后才出现的。微生物生长特征的差异表明，实验建立四年后，微生物群落从受干扰的（酶源的）到已建立的（原生的）微生物群落不断变化。结果支持植物多样性的单一假设，表明植物物种是独特的，每种植物都有助于地下系统的功能。研究结果强调了进行长期生物多样性实验的必要性，以充分了解当前生物多样性丧失对生态系统功能的影响。
The global decline in biodiversity has generated concern over the consequences for ecosystem functioning and services. Although ecosystem functions driven by soil microorganisms such as plant productivity, decomposition, and nutrient cycling are of particular importance, interrelationships between plant diversity and soil microorganisms are poorly understood. We analyzed the response of soil microorganisms to variations in plant species richness (1-60) and plant functional group richness (1-4) in an experimental grassland system over a period of six years. Major abiotic and biotic factors were considered for exploring the mechanisms responsible for diversity effects. Further, microbial growth characteristics were assessed following the addition of macronutrients. Effects of plant diversity oil Soil microorganisms were most pronounced in the most diverse plant communities though differences only became established after it time lag Of four years. Differences in microbial growth characteristics indicate Successional changes from a disturbed (zymogeneous) to an established (autochthonous) microbial community four years after establishment of the experiment. Supporting the singular hypothesis for plant diversity, the results Suggest that plant species are unique, each contributing to the functioning of the belowground system. The results reinforce the need for long-term biodiversity experiments to fully appreciate consequences of current biodiversity loss for ecosystem functioning.