Soil nitrogen mineralization and enzymatic activities in fire and fire surrogate treatments in California

Miesel, Jessica R.; Boerner, Ralph E. J.; Skinner, Carl N.

doi:10.4141/cjss10098

Cited by 16 publications

(12 citation statements)

References 62 publications

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“…Although plant cover was highly recovered 4 years after fire (Parra & Moreno, ), soil organic matter and enzyme activity (mainly, arylsulfatase, acid phosphatase and β‐glucosidase) were still significantly lower in burned soils than in unburned ones under natural rainfall condition, even 6 years after fire. This long‐lasting effect of fire on soil enzyme activity supports the claims of previous studies (Brooks, Twieg, Grayston, & Jones, ; López‐Poma & Bautista, ; Miesel, Boerner, & Skinner, ; Staddon, Duchesne, & Trevors, ). Soil fatty acid profile data indicated a significant effect of fire under natural rainfall condition on soil microbial biomass and community structure.…”

Section: Discussionsupporting

confidence: 88%

“…Thus, the low soil microbial activity (respiration rate and enzyme activities) observed in the burned soils shortly after fire (first post-fire spring) could be due to the slow recovery of soil microbial biomass through the reduction and modification of soil organic matter (Certini, 2005;González-Pérez, González-Vila, Almendros, & Knicker, 2004). Furthermore, it could also be associated with a lower plant cover observed the first 2 years after fire ( Figure S3) (Parra & Moreno, 2018 (Brooks, Twieg, Grayston, & Jones, 2013;López-Poma & Bautista, 2014;Miesel, Boerner, & Skinner, 2011;Staddon, Duchesne, & Trevors, 1998). Soil fatty acid profile data indicated a significant effect of fire under natural rainfall condition on soil microbial biomass and community structure.…”

Section: Effect Of Firementioning

confidence: 99%

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Drought and its legacy modulate the post‐fire recovery of soil functionality and microbial community structure in a Mediterranean shrubland

Hinojosa

Laudicina

Parra

et al. 2019

Global Change Biology

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The effects of drought on soil dynamics after fire are poorly known, particularly its long‐term (i.e., years) legacy effects once rainfall returns to normal. Understanding this is particularly important for nutrient‐poor soils in semi‐arid regions affected by fire, in which rainfall is projected to decrease with climate change. Here, we studied the effects of post‐fire drought and its legacy on soil microbial community structure and functionality in a Cistus‐Erica shrubland (Spain). Rainfall total and patterns were experimentally modified to produce an unburned control (natural rainfall) and four burned treatments: control (natural rainfall), historical control (long‐term average rainfall), moderate drought (percentile 8 historical rainfall, 5 months of drought per year), and severe drought (percentile 2, 7 months of drought). Soil nutrients and microbial community composition (ester‐linked fatty acid approach) and functionality (enzyme activities and C mineralization rate) were monitored during the first 4 years after fire under rainfall treatments, plus two additional ones without them (six post‐fire years). We found that the recovery of burned soils was lower under drought. Post‐fire drought increased nitrate in the short term and reduced available phosphorus, exchangeable potassium, soil organic matter, enzyme activities, and carbon mineralization rate. Moreover, drought decreased soil total microbial biomass and fungi, with bacteria becoming relatively more abundant. Two years after discontinuing the drought treatments, the drought legacy was significant for available phosphorus and enzyme activities. Although microbial biomass did not show any drought legacy effect, the proportion of fungi and bacteria (mainly gram‐positive) did, being lower and higher, respectively, in former drought‐treated plots. We show that drought has an important impact on soil processes, and that some of its effects persist for at least 2 years after the drought ended. Therefore, drought and its legacy effects can be important for modeling biogeochemical processes in burned soils under future climate change.

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Section: Discussionsupporting

confidence: 88%

Section: Effect Of Firementioning

confidence: 99%

Drought and its legacy modulate the post‐fire recovery of soil functionality and microbial community structure in a Mediterranean shrubland

Hinojosa

Laudicina

Parra

et al. 2019

Global Change Biology

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“…C/N ratios in TC and CF were similar (28)(29)(30)(31)(32)(33)(34), except for a significant higher value at Rueda-Matamina (45) due to the important amount of C presented in this conuco (Table 1). In general, the rate of nitrogen mineralization for the different type of conucos (TC and CF) did not present a consistent trend with respect to their respective controls, although the information was not very variable (16- 27 µg g-1).…”

Section: Changes In the Fertility Of Soils In Relation To Land Usementioning

confidence: 83%

“…Increasing deforestation for establishment of crop and pastures in Amazonia has become an issue of global concern due to its impacts on biodiversity, climate, and local and regional hydrological cycles [2,3,4,29]. However, in Venezuelan Amazonia, deforestation of the tropical rain forests surrounding Puerto Ayacucho, the capital of Amazonas State, is caused for both the establishment of cattle ranches by creoles (criollos), and the demographic growth and resettlement of native communities and internal migrations from other Venezuelan regions [23].…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Indexes Response to Land Use Change in Puerto Ayacucho, Venezuelan Amazonia

López‐Hernández¹

2017

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Abstract. Shifting cultivation (SF) or "conuco" is a form of crop cultivation of native Amerindian in Venezuelan Amazonia. SF is practiced in the primary forest as traditional conuco (TC) or in forestfallow as conuco in fallow (CF). Soil samples were random collected from previously settled conucos (TC and SF) and controls, and compared for fertility parameters (pH, C, N, available-P, Nmineralization), microbial biomass (C,N) and enzymatic activities. In CF, soil organic matter was drastically reduced (58%), whereas in the TC there was no significant difference with the control. Soil microbial biomass did not present a consistent trend within TCs, however, a drastic decrease was presented in the CF (59%). Phosphatase and urease were higher in the traditional conuco than in the primary forest, however the activities of both enzymes drastically declined in the conuco in fallow. Soil enzyme activity and microbial biomass were strongly affected by land degradation and represent very sensitive indicators of soil disturbance.

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“…[14][15][16][17][18][19][20][21] Forest stand thinning was investigated in terms of its impact on Cmineralization. [22][23][24]…”

Section: Introductionmentioning

confidence: 99%

Influence of Glutamic Acid Enantiomers on C‐mineralization

2014

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Seasonal dynamics in the mineralization of glutamic acid enantiomers in soils from selected ecosystems was determined and subjected to a range of treatments: ambient x elevated CO2 level and meadow x dense x thinned forest environment. Mineralization of glutamic acid was determined by incubation of the soil with 2 mg L- or D-glutamic acid g(-1) of dry soil to induce the maximum respiration rate. Mineralization of glutamic acid enantiomers in soils fluctuates over the course of a vegetation season, following a similar trend across a range of ecosystems. Mineralization is affected by environmental changes and management practices, including elevated CO2 level and thinning intensity. L-glutamic acid metabolism is more dependent on soil type as compared to metabolism of its D-enantiomer. The results support the hypothesis that the slower rate of D- compared to L- amino acid mineralization is due to different roles in anabolism and catabolism of the soil microbial community.

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Soil nitrogen mineralization and enzymatic activities in fire and fire surrogate treatments in California

Cited by 16 publications

References 62 publications

Drought and its legacy modulate the post‐fire recovery of soil functionality and microbial community structure in a Mediterranean shrubland

Drought and its legacy modulate the post‐fire recovery of soil functionality and microbial community structure in a Mediterranean shrubland

Soil Quality Indexes Response to Land Use Change in Puerto Ayacucho, Venezuelan Amazonia

Influence of Glutamic Acid Enantiomers on C‐mineralization

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