Resuscitation of the rare biosphere contributes to pulses of ecosystem activity.
Resuscitation of the rare biosphere contributes to pulses of ecosystem activity.
复制标题
稀有生物圈的复苏有助于生态系统活动的脉冲。
DOI：
10.3389/fmicb.2015.00024
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发表时间：
2015
影响因子：
5.2
通讯作者：
Lennon JT
中科院分区：
文献类型：
--
作者：
Aanderud ZT;Jones SE;Fierer N;Lennon JT
休眠是一种生活史特征，可能对将微生物群落与自然和管理的生态系统的功能联系起来具有重要意义。环境线索的快速变化可能会使休眠的细菌复苏，并产生生态系统活动的脉冲。在这项研究中，我们使用重水（H182 O）稳定同位素探测（SIP），以确定快速增长的细菌，与脉冲的微量气体（CO2，CH 4，和N2 O）从不同的生态系统[农业网站，草地，落叶林，针叶林（CF）]土壤再湿润事件后。无论生态系统类型，大部分（69-74%）的细菌，响应再润湿低于检测限在干燥的土壤。基于序列的恢复，在短短几天内，数百种稀有类群的丰度增加，在某些情况下成为重新湿润群落的主要成员，特别是属于鞘氨醇单胞菌科，丛毛单胞菌科和草酸杆菌科的细菌。复苏导致的动态变化，导致以前罕见的细菌，包括近60%的序列，恢复在rewetted社区的分类群的等级丰度。这种细菌群落的快速周转对应于5-20倍的CO2净生产量的增加和高达150%的CH 4的净生产量的减少，从再湿润的土壤。我们的研究结果表明，稀有生物圈可能占一个社区的一个大的和动态的部分，这是重要的细菌生物多样性的维护。此外，我们的研究结果表明，复苏的种子银行的稀有类群有助于生态系统功能。
Dormancy is a life history trait that may have important implications for linking microbial communities to the functioning of natural and managed ecosystems. Rapid changes in environmental cues may resuscitate dormant bacteria and create pulses of ecosystem activity. In this study, we used heavy-water (H182O) stable isotope probing (SIP) to identify fast-growing bacteria that were associated with pulses of trace gasses (CO2, CH4, and N2O) from different ecosystems [agricultural site, grassland, deciduous forest, and coniferous forest (CF)] following a soil-rewetting event. Irrespective of ecosystem type, a large fraction (69–74%) of the bacteria that responded to rewetting were below detection limits in the dry soils. Based on the recovery of sequences, in just a few days, hundreds of rare taxa increased in abundance and in some cases became dominant members of the rewetted communities, especially bacteria belonging to the Sphingomonadaceae, Comamonadaceae, and Oxalobacteraceae. Resuscitation led to dynamic shifts in the rank abundance of taxa that caused previously rare bacteria to comprise nearly 60% of the sequences that were recovered in rewetted communities. This rapid turnover of the bacterial community corresponded with a 5–20-fold increase in the net production of CO2 and up to a 150% reduction in the net production of CH4 from rewetted soils. Results from our study demonstrate that the rare biosphere may account for a large and dynamic fraction of a community that is important for the maintenance of bacterial biodiversity. Moreover, our findings suggest that the resuscitation of rare taxa from seed banks contribute to ecosystem functioning.
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影响因子：
2.9
作者：
Fierer, N;Schimel, JP
通讯作者：
Schimel, JP
DOI：
10.1073/pnas.0807920105
发表时间：
2008-11-18
影响因子：
11.1
作者：
Fierer, Noah;Hamady, Micah;Knight, Rob
通讯作者：
Knight, Rob
影响因子：
3.7
作者：
Aanderud, Zachary T.;Schoolmaster, Donald R., Jr.;Lennon, Jay T.
通讯作者：
Lennon, Jay T.
影响因子：
4.8
作者：
Fierer, Noah;Bradford, Mark A.;Jackson, Robert B.
通讯作者：
Jackson, Robert B.
影响因子：
11
作者：
Blazewicz, Steven J.;Barnard, Romain L.;Firestone, Mary K.
通讯作者：
Firestone, Mary K.