PDF(Pubmed)
Abstract：
Urban forests play a crucial role in the overall health and stability of urban ecosystems. Soil microorganisms are vital to the functioning of urban forest ecosystems as they facilitate material cycling and contribute to environmental stability. This study utilized high-throughput sequencing technology to examine the structural characteristics of bacterial and fungal communities in the bulk soil of six different forest stands: Phyllostachys pubescens (ZL), Metasequoia glyptostroboides (SSL), Cornus officinalis (SZY), mixed broad-leaved shrub forest (ZKG), mixed pine and cypress forest (SBL), and mixed broad-leaved tree forest (ZKQ). Soil samples were collected from each forest stand, including the corners, center, and edges of each plot, and a combined sample was created from the first five samples. The results revealed that among the bacterial communities, ZKG exhibited the highest alpha diversity in spring, while ZL demonstrated the highest alpha diversity in both summer and autumn. Proteobacteria was the most abundant bacterial phylum in all six forest stand soils. The dominant fungal phylum across the six forest stands was identified as Ascomycota. Notably, the microbial community diversity of SBL bulk soil exhibited significant seasonal changes. Although ZL exhibited lower bacterial community diversity in spring, its fungal community diversity was the highest. The bulk soil microbial diversity of ZL and SSL surpassed that of the other forest stands, suggesting their importance in maintaining the stability of the urban forest ecosystem in the Zhuyu Bay Scenic Area. Furthermore, the diversity of the bulk soil microbial communities was higher in all six stands during spring compared to summer and autumn. Overall, this study provides valuable insights into the seasonal variations of bulk soil microbial communities in urban forests and identifies dominant tree species, offering guidance for tree species\' selection and preservation in urban forest management.
摘要：
城市森林对城市生态系统的整体健康和稳定起着至关重要的作用。土壤微生物对城市森林生态系统的功能至关重要，因为它们促进了物质循环并有助于环境稳定。本研究利用高通量测序技术研究了六种不同林分的大块土壤中细菌和真菌群落的结构特征：毛竹（ZL），水杉（SSL），山茱萸(SZY),阔叶灌丛混交林(ZKG)，松柏混交林(SBL)，和混合阔叶树林（ZKQ）。从每个林分收集土壤样本，包括角落，中心,和每个情节的边缘，并从前五个样本中创建组合样本。结果显示，在细菌群落中，ZKG在春季表现出最高的α多样性，而ZL在夏季和秋季表现出最高的α多样性。变形杆菌是所有六个林分土壤中最丰富的细菌门。六个林分中的优势真菌门被确定为子囊。值得注意的是,SBL散装土壤微生物群落多样性表现出显著的季节变化。尽管ZL在春季表现出较低的细菌群落多样性，其真菌群落多样性最高。ZL和SSL的土壤微生物多样性超过其他林分，表明了它们在维持珠玉湾风景名胜区城市森林生态系统稳定方面的重要性。此外，与夏季和秋季相比，春季所有六个林分的散装土壤微生物群落的多样性更高。总的来说,这项研究为城市森林中散装土壤微生物群落的季节性变化提供了有价值的见解，并确定了优势树种，为城市森林管理中的树种选择和保护提供指导。
