Soil aggregate size mediates the impacts of cropping regimes on soil carbon and microbial communities

Soil Biology and Biochemistry, Journal Year: 2015, Volume and Issue: 91, P. 169 - 181

Published: Sept. 12, 2015

Language: Английский

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Carbon content and climate variability drive global soil bacterial diversity patterns

Ecological Monographs, Journal Year: 2016, Volume and Issue: 86(3), P. 373 - 390

Published: May 11, 2016

Abstract Despite the vital role of microorganisms for ecosystem functioning and human welfare, our understanding their global diversity biogeographical patterns lags significantly behind that plants animals. We conducted a meta‐analysis including ~600 soil samples from all continents to evaluate drivers bacterial in terrestrial ecosystems at scale. Similar what has been found with animals, bacteria Southern Hemisphere decreased equator Antarctica. However, showed similar levels across Northern Hemisphere. The composition communities followed dissimilar between hemispheres, as Hemispheres were dominated by Actinobacteria Acidobacteria, respectively. Proteobacteria was co‐dominant both hemispheres. Moreover, we decrease altitude. Climatic features (e.g., high diurnal temperature range low temperature) correlated lower elevations, but geographical gradients total carbon species turnover important observed latitudinal patterns. thus parallels differences aboveground vs. diversity. Our findings support previous studies highlighted pH , spatial influence, organic matter composition. Furthermore, results provide novel integrative view how climate factors influence scale, which is critical improve earth system simulation models formulating sustainable management conservation policies.

Language: Английский

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Microbial richness and composition independently drive soil multifunctionality

Functional Ecology, Journal Year: 2017, Volume and Issue: 31(12), P. 2330 - 2343

Published: June 20, 2017

Abstract Soil microbes provide multiple ecosystem functions such as nutrient cycling, decomposition and climate regulation. However, we lack a quantitative understanding of the relative importance microbial richness composition in controlling multifunctionality. This knowledge gap limits our capacity to understand influence biotic attributes provision services on which humans depend. We used two independent approaches (i.e. experimental observational), applied statistical modelling identify role bacterial driving multifunctionality (here defined seven measures respiration enzyme activities). In observational study, measured soil communities both tree‐ bare soil‐dominated microsites at 22 locations across 1,200 km transect southeastern Australia. study soils from those developed gradients diversity through inoculation sterilized soils. Microbial abundance Gammaproteobacteria, Actinobacteria, Bacteroidetes were positively related approaches; however, only was consistently selected key predictor all models here. Moreover, results, different approaches, evidence that are important, yet independent, drivers functions. Overall, findings advance mechanisms underpinning relationships between functionality terrestrial ecosystems, further suggest information needs be considered when formulating sustainable management conservation policies, predicting effects global change A plain language summary is available for this article.

Language: Английский

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The physiology and ecological implications of efficient growth

The ISME Journal, Journal Year: 2015, Volume and Issue: 9(7), P. 1481 - 1487

Published: Jan. 9, 2015

Language: Английский

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The active microbial diversity drives ecosystem multifunctionality and is physiologically related to carbon availability in Mediterranean semi‐arid soils

Molecular Ecology, Journal Year: 2016, Volume and Issue: 25(18), P. 4660 - 4673

Published: Aug. 3, 2016

Biogeochemical processes and ecosystemic functions are mostly driven by soil microbial communities. However, most methods focus on evaluating the total community fail to discriminate its active fraction which is linked functionality. Precisely, activity of strongly limited availability organic carbon (C) in soils under arid semi-arid climate. Here, we provide a complementary genomic metaproteomic approach investigate relationships between diversity community, ecosystem functionality across dissolved (DOC) gradient southeast Spain. DOC correlated with multifunctionality index composed respiration, enzyme activities (urease, alkaline phosphatase β-glucosidase) biomass (phospholipid fatty acids, PLFA). This study highlights that (determined metaprotoemics) but not whole (evaluated amplicon gene sequencing) related C it also connected index. We reveal shapes bacterial fungal populations Mediterranean determines compartmentalization functional niches. For instance, Rhizobales thrived at high-DOC sites probably fuelled metabolism one-C compounds. Moreover, analysis proteins involved transport carbohydrates revealed Ascomycota Basidiomycota occupied different nutritional The mechanisms for niche specialization were constant gradient.

Language: Английский

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