Drying–rewetting cycles and γ-irradiation effects on enzyme activities of distinct layers from a Quercus ilex L. litter

Alarcón-Gutiérrez, Enrique; Floch, Carine; Ziarelli, Fabio; Augur, Christopher; Criquet, Stéven

doi:10.1016/j.soilbio.2009.11.005

Cited by 22 publications

(11 citation statements)

References 51 publications

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“…Hinojosa et al (2004) and Alarcon-Gutierrez et al (2010) observed strong correlations between enzymatic activities and soil moisture.…”

Section: The Effect Of Soil Moisturementioning

confidence: 94%

“…Enzyme synthesis is controlled by biotic and abiotic factors such as the microbial community structure (Dijkstra and Cheng, 2007), soil moisture (Alarcon-Gutierrez et al, 2010), the mineral nutrient availability (Craine et al, 2007), the quantity and the quality of OM (Carreiro et al, 2000;Tripathi et al, 2007). Enzyme production is therefore controlled by several factors, all of which may interact, and it is predicted that many of these (temperature, soil moisture and nutrient availability) will change as a result of global change during the 21st century (IPCC, 2007).…”

Section: Introductionmentioning

confidence: 99%

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The impact of long-term CO2 enrichment and moisture levels on soil microbial community structure and enzyme activities

et al. 2012

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“…Hinojosa et al (2004) and Alarcon-Gutierrez et al (2010) observed strong correlations between enzymatic activities and soil moisture.…”

Section: The Effect Of Soil Moisturementioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

The impact of long-term CO2 enrichment and moisture levels on soil microbial community structure and enzyme activities

et al. 2012

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“…For instance, an increase in the production of hydrolytic enzymes responsible for the breakdown of complex organic C compounds (thus enhancing decomposition) was observed by Bouskill et al (2016) in samples subjected to repeated drought perturbation. Dry-wet cycles increase litter decomposition through cell wall damage, but also through hydrolysis of cellulose and related compounds (Taylor and Parkinso 1988;Alarcon-Gutierrez et al 2010). Extracellular enzymatic activity is related to water content and drying-rewetting cycles increase the leaf litter capacity to retain water, thus increasing enzymatic activity.…”

Section: Discussionmentioning

confidence: 99%

“…Extracellular enzymatic activity is related to water content and drying-rewetting cycles increase the leaf litter capacity to retain water, thus increasing enzymatic activity. Drying-rewetting cycles enhance the lysis of dead microbial cells and the subsequent release of intra-cellular content make leaf tissues more digestible for decomposing microorganism penetration (Alarcon-Gutierrez et al 2010;Mora-Gómez et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Simulated drought regimes reveal community resilience and hydrological thresholds for altered decomposition

et al. 2018

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Future climate scenarios forecast a 10-50% decline in rainfall in Eastern Amazonia. Altered precipitation patterns may change important ecosystem functions like decomposition through either changes in physical and chemical processes or shifts in the activity and/or composition of species. We experimentally manipulated hydroperiods (length of wet:dry cycles) in a tank bromeliad ecosystem to examine impacts on leaf litter decomposition. Gross loss of litter mass over 112 days was greatest in continuously submersed litter, lowest in continuously dry litter, and intermediate over a range of hydroperiods ranging from eight cycles of 7 wet:7 dry days to one cycle of 56 wet:56 dry days. The resilience of litter mass loss to hydroperiod length is due to a shift from biologically assisted decomposition (mostly microbial) at short wet:dry hydroperiods to physicochemical release of dissolved organic matter at longer wet:dry hydroperiods. Biologically assisted decomposition was maximized at wet:dry hydroperiods falling within the range of ambient conditions (12-22 consecutive dry days) but then declined under prolonged wet:dry hydroperiods (28 and 56 dry days. Fungal:bacterial ratios showed a similar pattern as biologically assisted decomposition to hydroperiod length. Our results suggest that microbial communities confer functional resilience to altered hydroperiod in tank bromeliad ecosystems. We predict a substantial decrease in biological activity relevant to decomposition under climate scenarios that increase consecutive dry days by 1.6- to 3.2-fold in our study area, whereas decreased frequency of dry periods will tend to increase the physicochemical component of decomposition.

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“…Alarcón‐Gutiérrez et al . () showed that a drying–rewetting cycle can decrease soil enzyme activities, which can be partially explained by protein conformational changes and a decrease in substrate diffusion.…”

Section: Discussionmentioning

confidence: 99%

Olive mill waste and glyphosate‐based herbicide addition to olive grove soils: effects on microbial activities and their responses to drying–rewetting cycles

Boukhdoud

Silva

Darwish

et al. 2017

Soil Use and Management

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The objective of this experimental study was to determine the effect of agronomic practices usually implemented in olive groves (addition of olive mill waste and herbicides) on soil microbial communities and to test whether drought enhanced such effects. For that purpose, mesocosms containing soil cores from olive groves were incubated for 5 months under either of the three treatments: (i) addition of olive mill waste (OMW), (ii) addition of glyphosate‐based herbicide (Gly treatment) and (iii) both treatments. Half of the mesocosms were subjected or not (controls) to drying–rewetting cycles (D/Rw) for 1 month (1 D/Rw) or 3 months (3 D/Rw). In the controls, 2 months after the Gly treatment, higher lipase activities were observed compared with no practice treatment as well as a significant change in catabolic profiles of cultivable microbial communities. Three months later, lipase activities significantly decreased under the Gly treatment. Addition of OMW together with Gly treatment counteracted the negative effect of the herbicide on lipase activities. After three D/Rw cycles, Gly treatment modified catabolic profiles and induced a decrease in functional diversity. Overall, the combination of glyphosate‐based herbicide with OMW was a conservative practice that maintained soil functioning and led to a better response to D/Rw cycles.

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Drying–rewetting cycles and γ-irradiation effects on enzyme activities of distinct layers from a Quercus ilex L. litter

Cited by 22 publications

References 51 publications

The impact of long-term CO2 enrichment and moisture levels on soil microbial community structure and enzyme activities

The impact of long-term CO2 enrichment and moisture levels on soil microbial community structure and enzyme activities

Simulated drought regimes reveal community resilience and hydrological thresholds for altered decomposition

Olive mill waste and glyphosate‐based herbicide addition to olive grove soils: effects on microbial activities and their responses to drying–rewetting cycles

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