Fungal diversity increases soil fungistasis and resistance to microbial invasion by a non resident species

Bonanomi, Giuliano; Capodilupo, Manuela; Incerti, Guido; Gaglione, Salvatore A.; Scala, Felice

doi:10.1016/j.biocontrol.2014.02.005

Cited by 28 publications

(29 citation statements)

References 50 publications

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“…Furthermore, we found no strong effect of community diversity on invasion resistance. Most existing experiments using constructed or manipulated microbial communities have suggested that biodiversity (defined in various ways) is a good indicator of invasion resistance in microbial communities [6,16,47]. Although diversity (particularly evenness) emerged as more important than some of the measures of the community metabolic activity, we consistently identified community cell yield as a much more important predictor of invasion resistance.…”

Section: Compositional Effectsmentioning

confidence: 54%

“…After some period of 1 growth, these communities are invaded with a new population of microbes, and the relationship between starting diversity and invasion success is determined. There is broad consensus from these experiments that there is a negative relationship between the species richness of the resident community and the growth of invader population [6,16,47]. Moreover, diversity appears to enhance invasion resistance because more diverse communities tend to more extensively grow on (and deplete) all the available resources (a 'complementarity effect'), and/or are more likely to contain a species that grows on (and depletes) the same resource as the invader (a 'sampling effect') [12,22].…”

Section: Introductionmentioning

confidence: 99%

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Relationships between community composition, productivity and invasion resistance in semi-natural bacterial microcosms

Jones

Rivett

Pascual‐García

et al. 2019

Preprint

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Experiments with artificial microbial communities indicate that certain community compositions are more resistant to microbial invasion than others. However, few invasion experiments have used natural microbial communities to investigate how the effect of community composition on invasion resistance relates to different aspects of community growth. We conducted experimental invasions of two bacterial species (Pseudomonas fluorescens and Pseudomonas putida) into 678 bacterial communities, comparing composition to several aspects of community growth prior to invasion to see how well they predicted invasion. We show that even in these complex microbial assemblages, the effects of resident community composition and growth are largely overlapping -with parameters associated with the productivity of the community (cell yield, community respiration) emerging as the main limiting factors for invasion success. Despite their complexity, these communities can be classified into a few compositional groups that are associated with the main differences in community growth, and thereby invasion resistance.

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Section: Compositional Effectsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Relationships between community composition, productivity and invasion resistance in semi-natural bacterial microcosms

Jones

Rivett

Pascual‐García

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…It is suggested that with small phylogenetic distance between invader and resident community members, resident community members impose strong competition on the invader type because phylogenetic similarity implies ecological similarity [8], which would reduce invasion success [9][10][11][12]. In a similar vein, it has been theoretically [1] and experimentally [13][14][15] suggested that biologically diverse communities are more resistant towards invasion, as originally proposed by Elton [7]. The most commonly cited reason is that more diverse communities are able to utilize resources more efficiently, thus leaving little resource space for invaders, and have higher probability of hosting a type capable of out-competing an invader.…”

Section: Introductionmentioning

confidence: 95%

“…The lack of consensus across studies may be because the investigations are often limited to only one determinant of invasion. For example, sometimes communities with different diversities are subject to invasion at single propagule pressure [9,13,15,25,26], or the phylogenetic distance between resident community members and invader is so large that it is highly improbable that it accurately represents competition for an ecological niche [14].…”

Section: Introductionmentioning

confidence: 99%

Stochastic processes govern invasion success in microbial communities when the invader is phylogenetically close to resident bacteria

et al. 2018

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Despite recent efforts in identifying the determinants of invasion in microbial communities, experimental observations across different ecosystems are inconclusive. While relationships between resident community diversity and invasion success are often noted, community diversity says little about community assembly processes. Community assembly processes may provide a more inclusive framework to explain-and potentially prevent or facilitate-invasion. Here we let replicate nitrite-oxidizing bacterial guilds assemble under different conditions from a natural source community and study their compositional patterns to infer the relative importance of the assembly processes. Then, an invader strain from that same guild was introduced at one of three propagule pressures. We found no significant correlation between community diversity and invasion success. Instead, we observed that the effect of selection on invasion success was surpassed by the effect of drift, as inferred from the substantial influence of propagule pressure on invasion success. This dominance of drift can probably be generalized to other invasion cases with high phylogenetic similarity between invader and resident community members. In these situations, our results suggest that attempting to modulate the invasibility of a community by altering its diversity is futile because stochastic processes determine the invasion outcome. Increasing or reducing propagule pressure is then deemed the most efficient avenue to enhance or limit invasion success.

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“…The intrinsic initial biochemical characteristics of plant litter are major factors driving its decomposition rate [ 26 , 53 , 54 ], hence directly or indirectly affecting interconnecting ecological processes, including litter nutrient dynamics [ 55 – 57 ] and suitability for microbial feeding [ 58 – 60 ], phytotoxicity [ 29 , 61 ] and plant-soil negative feedback [ 27 ]. Surprisingly, few studies attempted to relate the biochemical characteristics of different organic products with their effect on SWR.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Plant Litter on Soil Water Repellency: Insight from 13C NMR Spectroscopy

2016

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Soil water repellency (SWR, i.e. reduced affinity for water owing to the presence of organic hydrophobic coatings on soil particles) has relevant hydrological implications because low rates of infiltration enhance water runoff, and untargeted diffusion of fertilizers and pesticides. Previous studies investigated the occurrence of SWR in ecosystems with different vegetation cover but did not clarify its relationships with litter biochemical quality. Here, we investigated the capability of different plant litter types to induce SWR by using fresh and decomposed leaf materials from 12 species, to amend a model sandy soil over a year-long microcosm experiment. Water repellency, measured by the Molarity of an Ethanol Droplet (MED) test, was tested for the effects of litter species and age, and compared with litter quality assessed by 13C-CPMAS NMR in solid state and elemental chemical parameters. All litter types were highly water repellent, with MED values of 18% or higher. In contrast, when litter was incorporated into the soil, only undecomposed materials induced SWR, but with a large variability of onset and peak dynamics among litter types. Surprisingly, SWR induced by litter addition was unrelated to the aliphatic fraction of litter. In contrast, lignin-poor but labile C-rich litter, as defined by O-alkyl C and N-alkyl and methoxyl C of 13C-CPMAS NMR spectral regions, respectively, induced a stronger SWR. This study suggests that biochemical quality of plant litter is a major controlling factor of SWR and, by defining litter quality with 13C-CPMAS NMR, our results provide a significant novel contribution towards a full understanding of the relationships between plant litter biochemistry and SWR.

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Fungal diversity increases soil fungistasis and resistance to microbial invasion by a non resident species

Cited by 28 publications

References 50 publications

Relationships between community composition, productivity and invasion resistance in semi-natural bacterial microcosms

Relationships between community composition, productivity and invasion resistance in semi-natural bacterial microcosms

Stochastic processes govern invasion success in microbial communities when the invader is phylogenetically close to resident bacteria

The Influence of Plant Litter on Soil Water Repellency: Insight from 13C NMR Spectroscopy

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