欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

城市森林土壤微生物群落结构的季节变化

谭雪莲,阚蕾,张璐*,郑嘉仪   

  1. (华南农业大学林学与风景园林学院, 广州 510642)
  • 出版日期:2019-11-10 发布日期:2019-11-10

Seasonal dynamics of soil microbial community structure in urban forest. 

TAN Xue-lian, KAN Lei, ZHANG Lu*, ZHENG Jia-yi   

  1. (College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China).
  • Online:2019-11-10 Published:2019-11-10

摘要: 土壤微生物在森林生态系统中扮演重要的角色,是森林生态系统中物质循环的驱动因素,但目前对于城市森林土壤微生物群落的季节变化及其影响因素研究较少。因此,本研究以东莞城市森林为对象,采用高通量测序方法研究城市森林土壤微生物的季节变化规律及其影响因素。结果表明:土壤微生物群落结构和多样性有显著的季节变化,湿季土壤微生物总数量显著低于干季,但湿季土壤微生物Chao1指数和Shannon指数显著高于干季,湿季细菌和真菌的多样性和菌群结构更为丰富,其中细菌主要通过数量改变适应季节的变化,真菌主要通过数量以及物种组成的改变适应季节变化。土壤有效硼是细菌群落结构的主要影响因子,pH是真菌群落结构的主要影响因子,土壤中交换性钙和交换性镁亦是影响细菌和真菌群落的重要因子。

关键词: 生态动力学模型, 影响因素, 氮滞留效应, 多时间尺度, 山美水库

Abstract: Soil microbes play an important role in forest ecosystem and are the driving factor of material cycling. Few studies have been conducted on the seasonal changes and the influencing factors of soil microbial communities in urban forests. Using high-throughput sequencing methods, we investigated the seasonal changes of soil microbial community in the urban forest of Dongguan and analyzed their influencing factors. The results showed that the structure and diversity of soil microbial community significantly differed among seasons. The total abundance of soil microbes was significantly lower in wet season than in dry season. In contrast, both Chao1 index and Shannon index showed the opposite seasonal patterns compared with that of microbial abundance, with higher diversity and structure in the bacterial and fungal community in wet season. In adaptation to the seasonal change, bacteria mainly adjusted their total abundance, while fungi changed their total abundance and species composition. Soil available boron was the major factor influencing bacterial community structure, while soil pH was the major factor influencing fungal community structure. Exchangeable calcium and exchangeable magnesium in soil were the important factors influencing both bacterial and fungal communities.

Key words: nitrogen retention effect, multiple timescales, ecological dynamic model, Shanmei Reservoir., influencing factors