Linking soil bacterial and fungal communities to vegetation succession following agricultural abandonment
Linking soil bacterial and fungal communities to vegetation succession following agricultural abandonment
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将土壤细菌和真菌群落与农业废弃后的植被演替联系起来
DOI：
10.1007/s11104-018-3743-1
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发表时间：
2018-07
期刊：
影响因子：
4.9
通讯作者：
Zhang Quanfa
中科院分区：
文献类型：
--
作者：
Zhang Kerong;Cheng Xiaoli;Shu Xiao;Liu Yi;Zhang Quanfa
背景和目的从全球范围来看，自20世纪50年代以来，耕地被遗弃的速度和程度都大大增加。对于废弃农田，对长期植被发展过程中土壤细菌和真菌演替的了解尤其有限。为了检验农业弃耕对土壤生物群落演替的影响，对中国所在的秦岭地区历经百年次生植被演替坡度的弃耕地土壤细菌和真菌组成及多样性进行了研究。方法采用高通量测序技术，对22个弃耕地及其附近的7个非弃耕地的土壤真菌和细菌群落进行了研究。结果林分年龄(即弃耕年限)对土壤细菌和真菌群落组成的影响较大，细菌和真菌群落的变异程度分别为8.7%和31.6%。在演替过程中，尽管植被发生了明显的变化，但以化学有机营养细菌为主的变形杆菌仍保持着绝对优势地位(38.66%~40.77%)。随着林分年龄的增加，酸性细菌、植物真菌、马鲁氏杆菌、硝酸螺旋藻和螺旋藻的相对丰度显著增加，而浮游细菌、放线菌、双子藻、蓝藻和丝毛藻的相对丰度则呈相反的趋势。真菌群落在幼龄林中由子囊菌占优势转变为担子菌门占优势，这可能归因于演替过程中植被覆盖度和土壤湿度的增加。土壤细菌丰富度和多样性随着林龄的增加呈对数增长，并在演替后期逐渐达到平衡。土壤真菌多样性在演替初期呈增加趋势，随后呈下降趋势。土壤pH值是决定土壤真菌α多样性的最重要的环境因子。结论随着植被的演替，土壤细菌和真菌群落均呈现演替趋势。土壤细菌和真菌在农业废弃地次生演替过程中表现出明显的演替格局差异。
Background and aimsGlobally, the rate and extent of cropland abandonment increase greatly since 1950s. Knowledge of soil bacteria and fungi succession during long-term vegetation development is particularly limited for the abandoned croplands. In order to test the effects of agricultural abandonment on soil biota succession, we studied the soil bacterial and fungal composition and diversity in abandoned farmlands across a century of secondary vegetation successional gradient in China’s Qinling Mountains.MethodsUsing high-throughput sequencing technologies, the soil fungal and bacterial communities were studied in 22 abandoned farmlands, as well as 7 adjacent arable fields representing non-abandoned references.ResultsThe stand age, i.e., years since agricultural abandonment, affected the soil bacterial and fungal composition and explained 8.7 and 31.6% variations of bacterial and fungal communities (at order level), repectively. The Proteobacteria, dominated by chemoorganotrophic bacteria, kept its absolute dominance status (38.66% - 40.77%) constantly during succession even though the vegetation changed obviously from crop to grass, shrub, and forest. The relative abundances of Acidobacteria, Planctomycetes, Verrucomicrobia, Nitrospirae, and Spirochaetes increased significantly with stand age (i.e., years since abandonment), while the Firmicutes, Actinobacteria, Gemmatimonadetes, Cyanobacteria, and Armatimonadetes showed an opposite trend. A distinct shift in fungal communities from Ascomycota -dominant in young stands to Basidiomycota -dominant in older stands was observed, which could be attributed to the increase of vegetation coverage and soil moisture during succession. The soil bacterial richness and diversity increased logarithmically with increasing stand age and gradually reached equilibrium in late-successional stage. Soil fungal diversity tended to increase in the early successional stages and then followed by a decreasing trend. The soil pH was the most important environmental factor predicating the soil fungal α-diversity measurements.ConclusionsBoth the soil bacterial and fungal communities displayed successional trends along with vegetation succession. The soil bacteria and fungi exhibited marked differences in successional pattern during secondary succession following agricultural abandonment.
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将垃圾产生、质量和分解与农业废弃后的植被演替联系起来
影响因子：
9.7
作者：
Haishan Dang;Chen Ye;Yulong Zhang;Quanfa Zhang
通讯作者：
Quanfa Zhang
DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
C. Braak;P. Šmilauer
通讯作者：
C. Braak;P. Šmilauer
DOI：
10.1007/978-3-642-58001-7_9
发表时间：
1994
期刊：
--
影响因子：
--
作者：
D. Read
通讯作者：
D. Read
影响因子：
1.4
作者：
M. Roberts;R. Lubowski
通讯作者：
M. Roberts;R. Lubowski
影响因子：
11.4
作者：
Campbell, J. Elliott;Lobell, David B.;Field, Christopher B.
通讯作者：
Field, Christopher B.