Resource utilization capability of bacteria predicts their invasion potential in soil

Chao, Ma; Liu, Manqiang; Wang, Hui; Chen, Chenying; Fan, Weiliang; Griffiths, Bryan S.; Li, Huixin

doi:10.1016/j.soilbio.2014.11.025

Cited by 17 publications

(20 citation statements)

References 16 publications

(14 reference statements)

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“…However, given that we observed impacts upon invasion, our results indicate that E. coli appears to maintain some semblance of an active lifestyle when invading secondary, external environments like soil. It has recently been shown that different genotypes of E. coli survive longer in soil depending on their niche preferences [38], and across the E. coli species complex there is a large variation in the ratio between stress response and nutrient uptake genes [39]. For the O157:H7 and other forms, future experiments that aim to quantify such genes and their expression in both primary (gut) and external (soil or water) environments could reveal evolved forms that truly exemplify a biphasic lifestyle, capable of growing in both habitats.…”

Section: Discussionmentioning

confidence: 99%

The impact of failure: unsuccessful bacterial invasions steer the soil microbial community away from the invader’s niche

et al. 2018

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Although many environments like soils are constantly subjected to invasion by alien microbes, invaders usually fail to succeed, succumbing to the robust diversity often found in nature. So far, only successful invasions have been explored, and it remains unknown to what extent an unsuccessful invasion can impact resident communities. Here we hypothesized that unsuccessful invasions can cause impacts to soil functioning by decreasing the diversity and niche breadth of resident bacterial communities, which could cause shifts to community composition and niche structure-an effect that is likely exacerbated when diversity is compromised. To examine this question, diversity gradients of soil microbial communities were subjected to invasion by the frequent, yet oft-unsuccessful soil invader, Escherichia coli, and evaluated for changes to diversity, bacterial community composition, niche breadth, and niche structure. Contrary to expectations, diversity and niche breadth increased across treatments upon invasion. Community composition and niche structure were also altered, with shifts of niche structure revealing an escape by the resident community away from the invader's resources. Importantly, the extent of the escape varied in response to the community's diversity, where less diverse communities experienced larger shifts. Thus, although transient and unsuccessful, the invader competed for resources with resident species and caused tangible impacts that modified both the diversity and functioning of resident communities, which can likely generate a legacy effect that influences future invasion attempts.

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Section: Discussionmentioning

confidence: 99%

The impact of failure: unsuccessful bacterial invasions steer the soil microbial community away from the invader’s niche

et al. 2018

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“…and sparsely interconnected. In soils, disturbances that alter the quantity and quality of C and other resources may exert immense control over bacterial communities and microbial-mediated processes (Ma et al, 2015;Zechmeister-Boltenstern et al, 2015). With desert wildfires may come a flush of resources (Fuentes-Ramirez et al, 2015).…”

Section: Recovered Burned Communities Poorly Interconnectedmentioning

confidence: 99%

The Burning of Biocrusts Facilitates the Emergence of a Bare Soil Community of Poorly-Connected Chemoheterotrophic Bacteria With Depressed Ecosystem Services

et al. 2019

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Wildfires destabilize biocrust, requiring decades for most biological constituents to regenerate, but bacteria may recover quickly and mitigate the detrimental consequences of burnt soils. To evaluate the short-term recovery of biocrust bacteria, we tracked shifts in bacterial community form and function in Cyanobacteria/lichen-dominated (shrub interspaces) and Cyanobacteria/moss-dominated (beneath Artemisia tridentata) biocrusts 1 week, 2 months, and 1 year following a large-scale burn manipulations in a cold desert (Utah, USA). We found no evidence of the burned bacterial community recovering to a burgeoning biocrust. The foundational biocrust phyla, Cyanobacteria, dominated by Microcoleus viginatus (Microcoleaceae), disappeared from burned soils creating communities void of photosynthetic taxa. One year after the fire, the burned biocrust constituents had eroded away and the bare soils supported the formation of a convergent community of chemoheterotrophic copiotrophs regardless of location. The emergent community was dominated by a previously rare Planococcus species (family Planococcaceae, Firmicutes) and taxa in the Cellulomonadaceae (Actinobacteria), and Oxalobacteraceae (Betaproteobacteria). Previously burnt soils maintained similar levels of bacterial biomass, alpha diversity, and richness as unburned biocrusts, but supported diffuse, poorly-interconnected communities with 75% fewer species interactions. Nitrogen fixation declined at least 3.5-fold in the burnt soils but ammonium concentrations continued to rise through the year, suggesting that the exhaustion of organic C released from the fire, and not N, may diminish the longevity of the emergent community. Our results demonstrate that biocrust bacteria may recover rapidly after burning, albeit along a different community trajectory, as rare bacteria become dominant, species interconnectedness diminishes, and ecosystem services fail to rebound.

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“…Invader-centric research focuses on the invader's traits (Hambright et al, 2014) and, for example, compares the invasiveness of different alien types (Ma et al, 2015). The largest share of the literature, however, is 'resident community-centric' and thus evaluates community invasibility (Supplementary Table S1).…”

Section: Microbial Invasion In a Community Ecology Perspectivementioning

confidence: 99%

“…Invasion success would then be higher in less mature communities. Selection in a community can be markedly affected when the community is subjected to ecological disturbance (Shade et al, 2012;Ma et al, 2015). Disturbances tend to decrease community density and diversity, potentially increasing the available niche space -in other words temporarily decreasing competition.…”

Section: Framework For Microbial Invasions M Kinnunen Et Almentioning

confidence: 99%

A conceptual framework for invasion in microbial communities

et al. 2016

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There is a growing interest in controlling-promoting or avoiding-the invasion of microbial communities by new community members. Resource availability and community structure have been reported as determinants of invasion success. However, most invasion studies do not adhere to a coherent and consistent terminology nor always include rigorous interpretations of the processes behind invasion. Therefore, we suggest that a consistent set of definitions and a rigorous conceptual framework are needed. We define invasion in a microbial community as the establishment of an alien microbial type in a resident community and argue how simple criteria to define aliens, residents, and alien establishment can be applied for a wide variety of communities. In addition, we suggest an adoption of the community ecology framework advanced by Vellend (2010) to clarify potential determinants of invasion. This framework identifies four fundamental processes that control community dynamics: dispersal, selection, drift and diversification. While selection has received ample attention in microbial community invasion research, the three other processes are often overlooked. Here, we elaborate on the relevance of all four processes and conclude that invasion experiments should be designed to elucidate the role of dispersal, drift and diversification, in order to obtain a complete picture of invasion as a community process.

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Resource utilization capability of bacteria predicts their invasion potential in soil

Cited by 17 publications

References 16 publications

The impact of failure: unsuccessful bacterial invasions steer the soil microbial community away from the invader’s niche

The impact of failure: unsuccessful bacterial invasions steer the soil microbial community away from the invader’s niche

The Burning of Biocrusts Facilitates the Emergence of a Bare Soil Community of Poorly-Connected Chemoheterotrophic Bacteria With Depressed Ecosystem Services

A conceptual framework for invasion in microbial communities

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