Soil microbial and extractable C and N after wildfire

Prieto-Fernández, Ángeles; Acea, M. J.; Carballas, T.

doi:10.1007/s003740050411

Cited by 153 publications

(73 citation statements)

References 23 publications

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“…The concentrations of microbial C and extractable C, which were similar to those found in previous studies in similar soils (Díaz-Raviña et al, 1988;1993;Prieto et al, 1998;Leirós et al, 2000;Basanta et al, 2002), lied in the reported range given for forest soils (Wardle, 1992). As previously observed, among the soil characteristics analysed total C (r = 0.62, p < 0.001), total N (r = 0.42, p < 0.01), water holding capacity (r = 0.56, p < 0.001) and moisture content (r = 0.52, p < 0.001) were significantly and positively Table 3.…”

Section: Discussionsupporting

confidence: 88%

Soil microbial biomass under pine forests in the north-western Spain: influence of stand age, site index and parent material

Mahía¹,

Pérez-Ventura²,

Cabaneiro³

et al. 2006

For. syst.

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The effects of stand age, site index and parent material on soil biochemical properties related to biomass (extractable C, microbial C and metabolic quotient) were examined in the 0-15 cm mineral soil layers of Pinus pinaster and Pinus sylvestris stands from NW Spain. Two productivity levels (low and high site index), two ages (young and old) and two parent soil materials (granite and acid schists) were considered. The data indicated that there were differences in microbial parameters in soils under different species. In general in P. pinaster forest higher values of biochemical parameters, expressed on organic C basis, were observed in the stands of high site index as compared with the low ones; in contrast, in P. sylvestris no differences among stand site index were detected. In both species different results were also observed depending on parent material and a significant effect of stand age was detected for extractable C and microbial C in P. pinaster forest developed over granite. The data seem to indicate that measured parameters may have the potential to be used as indicators of the effect of forest management on soil organic matter quality.Key words: Microbial C, extractable C, metabolic quotient, reforestation, Pinus pinaster, Pinus sylvestris. ResumenBiomasa microbiana edáfica en pinares del noroeste de España: influencia de la edad de la plantación, índice de sitio y material de partida Se examina la influencia de la edad de la plantación, índice de sitio y material de partida sobre las propiedades bioquímicas relacionadas con la biomasa microbiana (C extraíble, C microbiano y coeficiente metabólico) del horizonte superficial de suelo (0-15 cm) de plantaciones de Pinus pinaster y Pinus sylvestris del Noroeste de España. Se consideraron dos índices de sitio (baja y alta calidad), dos edades de plantación (joven y vieja) y dos materiales de partida (granito y esquistos). Los datos indicaban que hubo diferencias entre los parámetros microbianos de suelos bajo diferente vegetación. En general, para P. pinaster se observaron valores más altos de los parámetros bioquímicos, expresados en base al contenido de C orgánico, en las plantaciones de alta calidad que en las de baja calidad; por el contrario en las plantaciones de P. sylvestris no se detectaron diferencias con respecto al índice de sitio. En las plantaciones de ambas especies se observaron resultados diferentes dependiendo del material de partida y también se observó un efecto significativo de la edad de la plantación sobre el C extraíble y el C microbiano en suelos desarrollados sobre granito bajo P. Pinaster. Los resultados parecen indicar que las propiedades bioquímicas medidas pueden ser utilizadas como indicadores del efecto del manejo forestal sobre la calidad de la materia orgánica del suelo.Palabras clave: C microbiano, C extraíble, coeficiente metabólico, plantación forestal, Pinus pinaster, Pinus sylvestris.

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Section: Discussionsupporting

confidence: 88%

Soil microbial biomass under pine forests in the north-western Spain: influence of stand age, site index and parent material

Mahía¹,

Pérez-Ventura²,

Cabaneiro³

et al. 2006

For. syst.

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show abstract

“…The lack of correlation is not surprising, as DNA ext is considered less reliable as a measure of microbial biomass estimate than is C mic . In general, C mic measurements following wildfires showed significant reductions and these reductions were sustained over periods of up to 13 years (16,24,35,42). The heat of the Chisholm-Slave Lake area wildfire likely had a direct effect, killing a substantial fraction of microbial biomass, but we cannot rule out other indirect causes of reduction of microbial biomass, such as changes in nutrient supply due to loss of plant cover.…”

Section: Discussionmentioning

confidence: 78%

“…Biomass most often decreases as a result of these disturbances, and this effect can last for many years (5,16,17,35,39,42,44). Culture-based analyses indicated effects of both fire and harvesting on the composition of microbial communities (18,38,54).…”

mentioning

confidence: 99%

Effects of Wildfire and Harvest Disturbances on Forest Soil Bacterial Communities

Smith

Kishchuk

Mohn

2008

Appl Environ Microbiol

137

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Wildfires and harvesting are important disturbances to forest ecosystems, but their effects on soil microbial communities are not well characterized and have not previously been compared directly. This study was conducted at sites with similar soil, climatic, and other properties in a spruce-dominated boreal forest near Chisholm, Alberta, Canada. Soil microbial communities were assessed following four treatments: control, harvest, burn, and burn plus timber salvage (burn-salvage). Burn treatments were at sites affected by a large wildfire in May 2001, and the communities were sampled 1 year after the fire. Microbial biomass carbon decreased 18%, 74%, and 53% in the harvest, burn, and burn-salvage treatments, respectively. Microbial biomass nitrogen decreased 25% in the harvest treatment, but increased in the burn treatments, probably because of microbial assimilation of the increased amounts of available NH 4 ؉ and NO 3 ؊ due to burning. Bacterial community composition was analyzed by nonparametric ordination of molecular fingerprint data of 119 samples from both ribosomal intergenic spacer analysis (RISA) and rRNA gene denaturing gradient gel electrophoresis. On the basis of multiresponse permutation procedures, community composition was significantly different among all treatments, with the greatest differences between the two burned treatments versus the two unburned treatments. The sequencing of DNA bands from RISA fingerprints revealed distinct distributions of bacterial divisions among the treatments. Gamma-and Alphaproteobacteria were highly characteristic of the unburned treatments, while Betaproteobacteria and members of Bacillus were highly characteristic of the burned treatments. Wildfire had distinct and more pronounced effects on the soil microbial community than did harvesting.

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“…Si bien se han observado disminuciones de hasta el 96% en biomasa microbiana inmediatamente después de un evento de este tipo (Hernández et al 1997), ningún ecosistema se mantiene estéril, aun después de un disturbio severo (Busse y deBano 2005). Al igual que en Trevelin, distintos estudios muestran una recuperación de las poblaciones de organismos en el suelo mineral, a niveles de prefuego dentro de uno a cuatro años después del mismo (Vázquez et al 1993, Prieto-Fernández et al 1998. Las condiciones del sitio y las condiciones climáticas anteriores y posteriores al fuego son importantes, ya que pueden influenciar la naturaleza de éste y la recuperación del sitio (Neary et al 1999).…”

Section: Resultsunclassified

Propiedades del suelo en bosques quemados de Austrocedrus chilensis en Patagonia, Argentina

Urretavizcaya

2010

Bosque (Valdivia)

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Soil microbial and extractable C and N after wildfire

Cited by 153 publications

References 23 publications

Soil microbial biomass under pine forests in the north-western Spain: influence of stand age, site index and parent material

Soil microbial biomass under pine forests in the north-western Spain: influence of stand age, site index and parent material

Effects of Wildfire and Harvest Disturbances on Forest Soil Bacterial Communities

Propiedades del suelo en bosques quemados de Austrocedrus chilensis en Patagonia, Argentina

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