Soil microbial communities are shaped by vegetation type and park age in cities under cold climate
Soil microbial communities are shaped by vegetation type and park age in cities under cold climate
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DOI：
10.1111/1462-2920.13660
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发表时间：
2017-03-01
影响因子：
5.1
通讯作者：
Setala, Heikki
中科院分区：
文献类型：
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作者：
Hui, Nan;Jumpponen, Ari;Setala, Heikki
土壤微生物在控制生态系统功能和提供生态系统服务方面发挥着关键作用。然而，城市绿地土壤中的微生物群落特征仍然很差。在此，我们比较了41个城市公园的土壤微生物群落(i)不同的植物功能类型（常绿树木、落叶树木和草坪）和（ii）不同的年龄（10年前、大约50年前和100年前）。这些微生物群落也与芬兰南部5个对照森林的微生物群落进行了比较。我们的研究结果表明，尽管城市公园经常受到干扰，但城市土壤微生物仍然遵循自然环境中植物-微生物关系的典型模式：城市公园中的细菌和真菌群落都对植物功能群有响应，但真菌受植物的控制比细菌更严格。我们发现，公园的年龄塑造了微生物群落的组成，这可能是因为老公园的植被比年轻公园的植被有更长的时间来改变土壤性质和微生物群落。此外，与持续受到人为干扰的城市公园相比，控制林拥有明显但多样性较低的土壤微生物群落。我们的研究结果强调了保持城市绿地和植物群落多样性的重要性，以促进城市系统中复杂的微生物群落和功能。
Soil microbes play a key role in controlling ecosystem functions and providing ecosystem services. Yet, microbial communities in urban green space soils remain poorly characterized. Here we compared soil microbial communities in 41 urban parks of (i) divergent plant functional types (evergreen trees, deciduous trees and lawn) and (ii) different ages (constructed 10, approximate to 50 and >100 years ago). These microbial communities were also compared to those in 5 control forests in southern Finland. Our results indicate that, despite frequent disturbances in urban parks, urban soil microbes still followed the classic patterns typical of plant-microbe associations in natural environments: both bacterial and fungal communities in urban parks responded to plant functional groups, but fungi were under tighter control of plants than bacteria. We show that park age shaped the composition of microbial communities, possibly because vegetation in old parks have had a longer time to modify soil properties and microbial communities than in young parks. Furthermore, control forests harboured distinct but less diverse soil microbial communities than urban parks that are under continuous anthropogenic disturbance. Our results highlight the importance of maintaining a diverse portfolio of urban green spaces and plant communities therein to facilitate complex microbial communities and functions in urban systems.