Mineralogical impact on long-term patterns of soil nitrogen and phosphorus enzyme activities

Turner, Stephanie; Schippers, Axel; Meyer-Stüve, Sandra; Guggenberger, Georg; Gentsch, Norman; Dohrmann, R.; Condron, Leo M.; Eger, André; Almond, Peter C.; Peltzer, Duane A.; Richardson, Sarah J.; Mikutta, Robert

doi:10.1016/j.soilbio.2013.09.016

Cited by 34 publications

(36 citation statements)

References 55 publications

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“…This link between vegetation and belowground microbiota was supported by correlation analysis showing a strong relationship between soil OC, ON and OP contents, and microbial activities and abundances (microbial biomass, total cell counts, and SSU rRNA gene copy numbers) for whole soil profiles along the chronosequence ( Table 2 ; Turner et al, 2014). …”

Section: Discussionmentioning

confidence: 66%

Microbial Community Dynamics in Soil Depth Profiles Over 120,000 Years of Ecosystem Development

et al. 2017

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Along a long-term ecosystem development gradient, soil nutrient contents and mineralogical properties change, therefore probably altering soil microbial communities. However, knowledge about the dynamics of soil microbial communities during long-term ecosystem development including progressive and retrogressive stages is limited, especially in mineral soils. Therefore, microbial abundances (quantitative PCR) and community composition (pyrosequencing) as well as their controlling soil properties were investigated in soil depth profiles along the 120,000 years old Franz Josef chronosequence (New Zealand). Additionally, in a microcosm incubation experiment the effects of particular soil properties, i.e., soil age, soil organic matter fraction (mineral-associated vs. particulate), O2 status, and carbon and phosphorus additions, on microbial abundances (quantitative PCR) and community patterns (T-RFLP) were analyzed. The archaeal to bacterial abundance ratio not only increased with soil depth but also with soil age along the chronosequence, coinciding with mineralogical changes and increasing phosphorus limitation. Results of the incubation experiment indicated that archaeal abundances were less impacted by the tested soil parameters compared to Bacteria suggesting that Archaea may better cope with mineral-induced substrate restrictions in subsoils and older soils. Instead, archaeal communities showed a soil age-related compositional shift with the Bathyarchaeota, that were frequently detected in nutrient-poor, low-energy environments, being dominant at the oldest site. However, bacterial communities remained stable with ongoing soil development. In contrast to the abundances, the archaeal compositional shift was associated with the mineralogical gradient. Our study revealed, that archaeal and bacterial communities in whole soil profiles are differently affected by long-term soil development with archaeal communities probably being better adapted to subsoil conditions, especially in nutrient-depleted old soils.

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Section: Discussionmentioning

confidence: 66%

Microbial Community Dynamics in Soil Depth Profiles Over 120,000 Years of Ecosystem Development

et al. 2017

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“…Many biotic and abiotic factors are known to control the effectiveness and efficiency of EEs and interactions between enzymes and their substrate in soils [9][10][11][12]. The soil mineral matrix is one important factor, especially various clay mineral types and concentrations.…”

Section: Introductionmentioning

confidence: 99%

Control of Soil Extracellular Enzyme Activities by Clay Minerals—Perspectives on Microbial Responses

2019

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Knowledge of how interactions of clay minerals and extracellular enzymes (EEs) influence organic matter turnover in soils are still under discussion. We studied the effect of different montmorillonite contents on EE activities, using two experiments—(1) an adsorption experiment with a commercially available enzyme (α-glucosidase) and (2) an incubation experiment (10 days) where microorganisms were stimulated to produce enzymes through organic carbon (OC) addition (starch and cellulose). Soil mixtures with different montmorillonite contents were created in four levels to a sandy soil: +0% (control), +0.1%, +1%, and +10%. The potential enzyme activity (pEA) of four enzymes, α-glucosidase, β-glucosidase, cellobiohydrolase, and aminopeptidase, involved in the soil carbon and nitrogen cycle were analysed. The adsorption experiment revealed a reduction in the catalytic activity of α-glucosidase by up to 76% with increasing montmorillonite contents. However, the incubation experiment showed an inhibitory effect on pEA only directly after the stimulation of in-situ EE production by OC addition. At later incubation stages, higher pEA was found in soils with higher montmorillonite contents. This mismatch between both experiments, with a transient reduction in catalytic activity for the incubation experiments, points to the continuous production of enzymes by soil microorganisms. It is conceivable that microbial adaptation is characterized by higher investment in EEs production induced by increasing clay contents and a stabilisation of the EEs by clay minerals. Our results point to the need to better understand EE-clay mineral-OC interactions regarding potential microbial adaptations and EE stabilisation with potentially prolonged activities.

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“…Extracellular enzymatic activities can be linked to litter decomposition rate, which has been recommended as the most appropriate indicator of microbial decomposition, soil fertility and ecological stability (Freeman, Ostle, & Kang, ; Turner et al, ). Some investigators have suggested that N deposition have different effects on extracellular enzyme activities; enzymes responded differently in different ecosystems and different decomposing stages (Wang, Lv, Liu, & Wang, ).…”

Section: Discussionmentioning

confidence: 99%

“…Over 80% of the carbon (C) fixed via photosynthesis in terrestrial forests falls as litter, which is then decomposed by microbes and detritivores in the brown food webs (García Palacios, Shaw, Wall, & Hättenschwiler, ; Jia et al, ; Kaspari & Yanoviak, ). Among those decomposers, saprotrophic microorganisms are the principal drivers responsible for litter decomposition and nutrient cycling; powerful enzymatic capabilities enable them to breakdown the most recalcitrant components of litter into small utilizable molecules (Lü et al, ; Turner et al, ). While soil macro‐detritivores are consistently described as litter transformers and contributed more by interacting with microflora (García Palacios et al, ; Jia et al, ).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen deposition slows down the litter decomposition induced by soil macrofauna in the soil of subtropical forests in China

Jia

Dalu

Chuan-wan

et al. 2019

Ecological Research

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As atmospheric nitrogen (N) deposition elevates, extensive researches into the consequences of N deposition on litter decomposition process have been triggered; yet, responses of aboveground macro‐detritivores to atmospheric N deposition and their interactive effects on saprotrophic microorganisms and litter decomposition process are not thoroughly understood. By soil incubation, we assessed the influence of N deposition on the decomposition process of broad leaf (Quercus acutissima) and needle (Pinus massoniana) litter mediated by macro‐detritivore isopods (Armadillidium vulgare) and soil microorganisms. Changes in litter chemical composition (total carbohydrate and N), litter mass loss, soil pH values, soil microbial biomass and the activities of degradative enzymes were determined during a 6‐month laboratory incubation. Results showed that N addition enhanced Q. acutissima litter decomposition in the absence of A. vulgare, but decreased that when A. vulgare presence. N addition had no significant effect on P. massoniana litter decomposition regardless of A. vulgare presence or absence. However, N addition decreased isopod feeding contributions, with litter mass loss of 1.83–2.92 times lower than those of only isopod addition treatments in the two litter types. N addition inhibited soil microbial biomass and enzymatic activities related to N and phenolic metabolism of needle litter when isopods presence. Our findings suggest that N addition likely weakens the feeding activity of soil fauna and slows down the litter decomposition in broad‐leaved forests. This implies that a long‐term consequence of N deposition may induce the soil C accumulation and affect the balance of ecosystem nutrient flux in subtropical broad‐leaved forests.

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Mineralogical impact on long-term patterns of soil nitrogen and phosphorus enzyme activities

Cited by 34 publications

References 55 publications

Microbial Community Dynamics in Soil Depth Profiles Over 120,000 Years of Ecosystem Development

Microbial Community Dynamics in Soil Depth Profiles Over 120,000 Years of Ecosystem Development

Control of Soil Extracellular Enzyme Activities by Clay Minerals—Perspectives on Microbial Responses

Nitrogen deposition slows down the litter decomposition induced by soil macrofauna in the soil of subtropical forests in China

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