Beneficial Cyanosphere Heterotrophs Accelerate Establishment of Cyanobacterial Biocrust
Beneficial Cyanosphere Heterotrophs Accelerate Establishment of Cyanobacterial Biocrust
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有益的蓝圈异养生物加速蓝藻生物结皮的建立
DOI：
10.1128/aem.01236-21
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发表时间：
2021
影响因子：
4.4
通讯作者：
Garcia-Pichel, Ferran
中科院分区：
文献类型：
--
作者：
Nelson, Corey;Garcia-Pichel, Ferran
生物土壤结皮（生物结皮）是居住在干旱土壤表面并为旱地生态系统提供基本服务的微生物群落。生物结壳虽然能抵抗极端的环境条件，但易受人为干扰的影响，这些干扰可能使生态系统在几十年内失去这些宝贵的服务。直到最近，在美国西南部，基于培养的努力，以生产蓝藻生物结壳恢复接种物的重点是生产和繁殖最丰富的初级生产者和生物结壳的先驱，阴道微鞘藻和家庭成员Coleofasciculaceae（也称为Microcoleus steenstrupii复合体）。发现一个独特的微生物群落的特点是固氮，被称为蓝藻，是密切相关的M。vaginatus暗示了一种共生的劳动分工，其中营养物质在光养生物和异养生物之间进行交换。为了探索潜在的使用，这样的蓝藻层成员在生物结壳的恢复，我们进行coinoculations的土壤基质与蓝藻层成分。这导致蓝藻生长比单独接种蓝藻所见的更快。此外，我们发现，仅仅添加有益的异养生物增强了粘性生物结壳的形成，而不需要额外的光养生物量内含有微量的生物结壳蓝藻的原生土壤。我们的研究结果支持迄今未知的作用，有益的异养细菌在生物结壳的建立和生长，并允许我们提出建议，生物结壳恢复工作的基础上存在的残余生物结壳社区在受干扰的地区。未来的biocrust恢复工作应考虑蓝藻和有益的异养社区作为inoculants.IMPORTANCEThe进步的biocrust恢复方法的蓝藻biocrusts已在很大程度上实现了通过试验和错误。成功和失败并不总是可以追溯到特定的因素。对生物结壳群落中微生物相互作用的研究和应用是实现生物结壳恢复的关键一步。
Biological soil crusts (biocrusts) are communities of microbes that inhabit the surface of arid soils and provide essential services to dryland ecosystems. While resistant to extreme environmental conditions, biocrusts are susceptible to anthropogenic disturbances that can deprive ecosystems of these valuable services for decades. Until recently, culture-based efforts to produce inoculum for cyanobacterial biocrust restoration in the southwestern United States focused on producing and inoculating the most abundant primary producers and biocrust pioneers, Microcoleus vaginatus and members of the familyColeofasciculaceae(also called Microcoleus steenstrupii complex). The discovery that a unique microbial community characterized by diazotrophs, known as the cyanosphere, is intimately associated with M. vaginatus suggests a symbiotic division of labor in which nutrients are traded between phototrophs and heterotrophs. To probe the potential use of such cyanosphere members in the restoration of biocrusts, we performed coinoculations of soil substrates with cyanosphere constituents. This resulted in cyanobacterial growth that was more rapid than that seen for inoculations with the cyanobacterium alone. Additionally, we found that the mere addition of beneficial heterotrophs enhanced the formation of a cohesive biocrust without the need for additional phototrophic biomass within native soils that contain trace amounts of biocrust cyanobacteria. Our findings support the hitherto-unknown role of beneficial heterotrophic bacteria in the establishment and growth of biocrusts and allow us to make recommendations concerning biocrust restoration efforts based on the presence of remnant biocrust communities in disturbed areas. Future biocrust restoration efforts should consider cyanobacteria and their beneficial heterotrophic community as inoculants.IMPORTANCEThe advancement of biocrust restoration methods for cyanobacterial biocrusts has been largely achieved through trial and error. Successes and failures could not always be traced back to particular factors. The investigation and application of foundational microbial interactions existing within biocrust communities constitute a crucial step toward informed and repeatable biocrust restoration methods.
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DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
3.2
作者：
Faist, Akasha M.;Antoninka, Anita J.;Barger, Nichole N.
通讯作者：
Barger, Nichole N.
影响因子：
3.2
作者：
Chandler, David G.;Day, Natalie;Belnap, Jayne
通讯作者：
Belnap, Jayne
影响因子：
10.7
作者：
Katoh K;Standley DM
通讯作者：
Standley DM
影响因子：
15.5
作者：
Couradeau, Estelle;Giraldo-Silva, Ana;Garcia-Pichel, Ferran
通讯作者：
Garcia-Pichel, Ferran