土壤细菌和真菌群落的物种续存模式对扰动的响应
发布时间：2019-05-12 19:48
【摘要】：通过研究物种存活概率和局域多度间的关系,对微生物群落动态是否符合中性假说进行检验.使用野外采集的土壤进行土壤微宇宙实验,微宇宙经受了稀释扰动,剔除一些非常稀有的物种.微宇宙经过恢复培养后,用454高通量焦磷酸测序方法分别对土壤细菌16SrRNA基因和真菌18SrRNA基因进行测序,检测多度≥1的物种,从而探究细菌和真菌物种组成相对于源土壤发生的变化.结果发现:恢复生长过程中细菌和真菌物种丰富度都显著降低(50%);受到扰动的微宇宙恢复生长以后,土壤细菌和真菌物种存活概率与其在源土壤中的初始相对多度之间呈正相关,这个结果符合中性假说的预测,即最初多度较高的物种平均灭绝概率较低.
[Abstract]:By studying the relationship between species survival probability and local abundance, the relationship between microbial community dynamics and neutral hypothesis was tested. Soil microcosmos experiments were carried out using soil collected in the field. The microuniverse experienced dilution disturbance and eliminated some very rare species. After the microuniverse was restored and cultured, the 16SrRNA gene of soil bacteria and the 18SrRNA gene of fungi were sequenced by high throughput pyrophosphate sequencing method, and the species with abundance 鈮，
本文编号：2475655
[Abstract]:By studying the relationship between species survival probability and local abundance, the relationship between microbial community dynamics and neutral hypothesis was tested. Soil microcosmos experiments were carried out using soil collected in the field. The microuniverse experienced dilution disturbance and eliminated some very rare species. After the microuniverse was restored and cultured, the 16SrRNA gene of soil bacteria and the 18SrRNA gene of fungi were sequenced by high throughput pyrophosphate sequencing method, and the species with abundance 鈮，
本文编号：2475655
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