Evidence that plant diversity and site productivity confer stability to forest floor microbial biomass

Royer‐Tardif, Samuel; Bradley, Robert L.; Parsons, William F. J.

doi:10.1016/j.soilbio.2010.01.018

Cited by 47 publications

(29 citation statements)

References 53 publications

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“…The bacterial diversity was higher in the non-copper-stressed treatments compared to the copper-stressed treatments in both soils, which might contribute to the high resistance of SIR. A study involving pure or mixed boreal forest in different soil types subjected to stress from wildfire or harvesting found evidence that the resistance of the microbial biomass to experimental disturbances (dry-wet, Cu and HCl) was greatest in mixed forest, probably owing to high resource diversity leading to greater microbial diversity and more resistant taxa (Royer-Tardif et al, 2010).…”

Section: Changes In the Magnitude Of Sir Decreases With Repeated Dry-mentioning

confidence: 99%

Copper pollution decreases the resistance of soil microbial community to subsequent dry–rewetting disturbance

Wang

et al. 2016

Journal of Environmental Sciences

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Dry-rewetting (DW) disturbance frequently occurs in soils due to rainfall and irrigation, and the frequency of DW cycles might exert significant influences on soil microbial communities and their mediated functions. However, how microorganisms respond to DW alternations in soils with a history of heavy metal pollution remains largely unknown.Here, soil laboratory microcosms were constructed to explore the impacts of ten DW cycles on the soil microbial communities in two contrasting soils (fluvo-aquic soil and red soil) under three copper concentrations (zero, medium and high). Results showed that the fluctuations of substrate induced respiration (SIR) decreased with repeated cycles of DW alternation. Furthermore, the resistance values of substrate induced respiration (RS-SIR) were highest in non-copper-stressed (zero) soils. Structural equation model (SEM) analysis ascertained that the shifts of bacterial communities determined the changes of RS-SIR in both soils. The rate of bacterial community variance was significantly lower in noncopper-stressed soil compared to the other two copper-stressed (medium and high) soils, which might lead to the higher RS-SIR in the fluvo-aquic soil. As for the red soil, the substantial increase of the dominant group WPS-2 after DW disturbance might result in the low RS-SIR in the high copper-stressed soil. Moreover, in both soils, the bacterial diversity was highest in non-copper-stressed soils. Our results revealed that initial copper stress could decrease the resistance of soil microbial community structure and function to subsequent DW disturbance.

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Section: Changes In the Magnitude Of Sir Decreases With Repeated Dry-mentioning

confidence: 99%

Copper pollution decreases the resistance of soil microbial community to subsequent dry–rewetting disturbance

Wang

et al. 2016

Journal of Environmental Sciences

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“…Acidification of the interior of a microbial cell inhibits the activity of most enzymes as well as overall cell metabolism (Beales, 2004). But fungi have a lower area to volume ratio, enabling them to tolerate a more acidic environment than bacteria (Royer-Tardif et al, 2010). This explained why the bacterial biomass decreased significantly and the fungal biomass did not change (no significant differences) after conversion (Figs.…”

Section: Discussionmentioning

confidence: 99%

“…In accordance with our third hypothesis, pH was the main driver of the variation in the soil microbial communities. On the one hand, pH directly influences bacterial and fungal physiology status (Beales, 2004;Royer-Tardif et al, 2010). On the other hand, pH influences nutrient availability and ion toxicity in soils (Zhalnina et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Changes of anaerobic to aerobic conditions but not of crop type induced bulk soil microbial community variation in the initial conversion of paddy soils to drained soils

Dai

Yuan

Wang

2016

CATENA

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a b s t r a c t a r t i c l e i n f oSoil microorganisms are the main drivers of all of the biochemical processes that occur in soils. Land-use conversion, a common occurrence driven by market economy, changes plant species and the associated management strategies, thus significantly influences soil microbial communities. However, few studies have been conducted to disentangle the effect of the alteration of plant species from that of soil environment during the initial years of conversion. In this study, the effect of land-use conversion from double rice cropping (RR) to maize-maize (MM) and soybean-peanut (SP) double cropping systems on soil physical and chemical properties and microbial communities was studied two years after the conversion in southern China. The results showed that land use conversion significantly changed the soil properties, microbial communities and microbial biomass. The soil water content decreased significantly by 26.3%, and the pH decreased by 0.50 and 0.52 for MM and SP, respectively, compared with RR. Soil inorganic N also decreased significantly by 55% after the conversion to drained fields. The total phospholipid fatty acids (PLFAs), and bacterial, G+, G− and actinomycetic PLFAs decreased significantly after the conversion. No significant differences were found in the soil properties, microbial communities and microbial biomass between the converted MM and SP. Our results indicated that the changes of anaerobic to aerobic conditions, rather than of crop type, induced the variations in the soil properties and microbial communities during the initial years after conversion from paddy soils to drained soils. In particular, soil pH was the key factor that regulated the variations in the soil microbial communities after conversion.

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“…Though they achieve similar growth rates (Longpré et al 1994), they have been shown to induce dissimilar understory plant communities (Légaré et al 2001), forest floor properties (Ste-Marie et al 2007) and microbial communities (Royer-Tardif et al 2010). These differences are likely to result from differences in litter chemical quality, root properties, and light transmittance of each species.…”

Section: Introductionmentioning

confidence: 99%

“…1) (Royer-Tardif et al 2010;Ste-Marie et al 2007). Although these "compositional boundaries" are abrupt, it is not known how underlying forest floor properties and microbial communities respond to the sudden change in vegetation.…”

Section: Introductionmentioning

confidence: 99%

Forest floor properties across sharp compositional boundaries separating trembling aspen and jack pine stands in the southern boreal forest

Royer‐Tardif

Bradley

2011

Plant Soil

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Jack pine and trembling aspen are two early-seral boreal tree species with contrasting nutrient cycling strategies. Both species may form adjacent mono-specific stands separated by sharp compositional boundaries. We hypothesized that such boundaries result in wider functional ecotones. Spatial transitions in humus forms, forest floor chemistry and microbial communities were assessed across 32 m long transects set perpendicular to sharp compositional boundaries separating four jack pine and aspen stands. Split moving window analysis (SMWA) and moving window regression analysis (MWRA) were used to locate functional boundaries and ecotones. We found a gradual transition from moder (aspen) to mor (jack pine) humus spanning 16 m across the compositional boundary. An abrupt increase in forest floor water content at 3 m within jack pine stands was possibly due to aspen roots foraging for water beyond the boundary. The functional boundary and associated ecotone for forest floor pH, C:N ratio, Mg and ammonification were skewed toward jack pine stands, likely the result of aspen leaf dispersal. Low nitrification rates throughout jack pine stands and up to 11 m into aspen stands suggested that jack pine roots might extend far within aspen stands and produce metabolites that suppress nitrification. SMWA performed on the multivariate dataset of microbial fatty acids (FAs) revealed three distinct forest floor microbial communities that were skewed toward jack pine stands. Pine-type communities were associated to fungal FAs, pine-type and transition-type communities to non-fungal eukaryotic FAs, and aspen-type communities to bacterial FAs. Taken collectively, our data delimit a 24 m wide functional ecotone straddling sharp compositional boundaries separating trembling aspen and jack pine stands. We conclude that the functional diversity of boreal landscapes, where adjacent mono-specific stands are prevalent, is related to the patchiness of the landscape.

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Evidence that plant diversity and site productivity confer stability to forest floor microbial biomass

Cited by 47 publications

References 53 publications

Copper pollution decreases the resistance of soil microbial community to subsequent dry–rewetting disturbance

Copper pollution decreases the resistance of soil microbial community to subsequent dry–rewetting disturbance

Changes of anaerobic to aerobic conditions but not of crop type induced bulk soil microbial community variation in the initial conversion of paddy soils to drained soils

Forest floor properties across sharp compositional boundaries separating trembling aspen and jack pine stands in the southern boreal forest

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