Influence of repeated prescribed burning on the soil fungal community in an eastern Australian wet sclerophyll forest

Bastias, Brigitte A.; Huang, Zhiqun; Blumfield, Timothy John; Xu, Zhihong; Cairney, John

doi:10.1016/j.soilbio.2006.06.007

Cited by 86 publications

(59 citation statements)

References 44 publications

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“…Six months after a natural fire in a Mediterranean shrubland ecosystem (Dannenmann et al 2011) and a South African woodland (Aranibar et al 2003), gross ammonification in the 0-5 cm soil layer was still two-or three-times higher in burned than in unburned plots. However, this transient postfire increase of gross N mineralization disappears 2-3 years after the fire, according with studies of several authors in the 0-10 cm soil layer (Bastias et al 2006;Leduc and Rothstein 2007;Koyama et al 2010Koyama et al , 2012. Leduc and Rothstein (2007) reported similar rates in burned and unburned soils from North American pine forests, while Koyama et al (2010Koyama et al ( , 2012 in the same ecosystem and Bastias et al (2006) in Australian wet sclerophyll forests found lower values in burned soils, likely due to reduced C availability to soil microbes (Koyama et al 2010(Koyama et al , 2012.…”

Section: Discussionsupporting

confidence: 52%

Short-term impact of a wildfire on net and gross N transformation rates

Gómez-Rey

González-Prieto

2013

Biol Fertil Soils

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Wildfires often modify soil properties, including the N status and net N mineralization rates, but their impacts on gross N fluxes have been scarcely evaluated. We aimed to ascertain the immediate effects of a medium-high severity wildfire on soil N transformations. Net and gross N rates were analytically and numerically (FLUAZ) quantified in burned (BS) and unburned (US) topsoils from the temperate-humid region (NW Spain). Analytical and numerical solutions were significantly correlated for both gross N mineralization (m) (r ), our gross m and n rates were similar and very low, respectively; gross n showed that nitrifiers were active in US and also in BS, despite the 98 % reduction observed immediately after the fire. For gross fluxes, m increased more than ia suggesting an NH 4 + -N accumulation, but there is no risk of NO 3 --N leaching because n decreased more than in.

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Section: Discussionsupporting

confidence: 52%

Short-term impact of a wildfire on net and gross N transformation rates

Gómez-Rey

González-Prieto

2013

Biol Fertil Soils

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“…Previous studies at the same study area have demonstrated that fungal community composition in the B2 plots was significantly different from that in B0 or B4 plots due to the change in soil C and N (e.g. Bastias et al, 2006a). Meanwhile, soil pH and TC were found to have significant effects on the AOB community composition in the topsoil.…”

Section: Effects Of Long-term Prescribed Burning On Aob and Aoa Commumentioning

confidence: 85%

Shifts in the abundance and community structure of soil ammonia oxidizers in a wet sclerophyll forest under long-term prescribed burning

Long

Chen

et al. 2014

Science of The Total Environment

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• We examined how fires affected the abundances and communities of soil AOB and AOA.• A long-term repeated forest fire experiment was investigated.• Fires increased the abundance of bacterium amoA genes, but not archaeal amoA genes.• Fire also modified the composition of AOA and AOB communities.• AOB genotype was affected by soil pH and DOC, while AOA by nitrate-N and DOC. a b s t r a c t a r t i c l e i n f o Fire shapes global biome distribution and promotes the terrestrial biogeochemical cycles. Ammonia-oxidizing bacteria (AOB) and archaea (AOA) play a vital role in the biogeochemical cycling of nitrogen (N). However, behaviors of AOB and AOA under long-term prescribed burning remain unclear. This study was to examine how fire affected the abundances and communities of soil AOB and AOA. A long-term repeated forest fire experiment with three burning treatments (never burnt, B0; biennially burnt, B2; and quadrennially burnt, B4) was used in this study. The abundances and community structure of soil AOB and AOA were determined using quantitative PCR, restriction fragment length polymorphism and clone library. More frequent fires (B2) increased the abundance of bacterium amoA gene, but tended to decrease archaeal amoA genes. Fire also modified the composition of AOA and AOB communities. Canonical correspondence analysis showed soil pH and dissolved organic C (DOC) strongly affected AOB genotypes, while nitrate-N and DOC shaped the AOA distribution. The increased abundance of bacterium amoA gene by fires may imply an important role of AOB in nitrification in fire-affected soils. The fire-induced shift in the community composition of AOB and AOA demonstrates that fire can disturb nutrient cycles.

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“…The proportion of nitrogen in fallen leaves has been found to be greater in unburnt plots than the frequently burnt plots of the Bulls Ground experiment [49]. Topsoil soil nitrogen (0-10 cm deep) has also been found to be higher in fire exclusion treatments than quadrennial or biennial burning treatments (only the differences between unburnt and biennial treatment were significant though) in an experiment conducted within E. pilularis forest in southern Queensland, Australia [50]. It is possible that the nitrogen fixing ability of A. torulosa may have allowed this species to overcome nitrogen limitations and exploit the greater space available on the frequently burnt plots.…”

Section: Impacts Of Frequent Burning On Carbon and Stand Structurementioning

confidence: 92%

Impacts of Frequent Burning on Live Tree Carbon Biomass and Demography in Post-Harvest Regrowth Forest

Collins

Penman

Ximenes

et al. 2014

Forests

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Abstract:The management of forest ecosystems to increase carbon storage is a global concern. Fire frequency has the potential to shift considerably in the future. These shifts may alter demographic processes and growth of tree species, and consequently carbon storage in forests. Examination of the sensitivity of forest carbon to the potential upper and lower extremes of fire frequency will provide crucial insight into the magnitude of possible change in carbon stocks associated with shifts in fire frequency. This study examines how tree biomass and demography of a eucalypt forest regenerating after harvest is affected by two experimentally manipulated extremes in fire frequency (i.e., ~3 year fire intervals vs. unburnt) sustained over a 23 year period. The rate of post-harvest biomass recovery of overstorey tree species, which constituted ~90% of total living tree biomass, was lower within frequently burnt plots than unburnt plots, resulting in approximately 20% lower OPEN ACCESSForests 2014, 5 803 biomass in frequently burnt plots by the end of the study. Significant differences in carbon biomass between the two extremes in frequency were only evident after >15-20 years of sustained treatment. Reduced growth rates and survivorship of smaller trees on the frequently burnt plots compared to unburnt plots appeared to be driving these patterns. The biomass of understorey trees, which constituted ~10% of total living tree biomass, was not affected by frequent burning. These findings suggest that future shifts toward more frequent fire will potentially result in considerable reductions in carbon sequestration across temperate forest ecosystems in Australia.

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Influence of repeated prescribed burning on the soil fungal community in an eastern Australian wet sclerophyll forest

Cited by 86 publications

References 44 publications

Short-term impact of a wildfire on net and gross N transformation rates

Short-term impact of a wildfire on net and gross N transformation rates

Shifts in the abundance and community structure of soil ammonia oxidizers in a wet sclerophyll forest under long-term prescribed burning

Impacts of Frequent Burning on Live Tree Carbon Biomass and Demography in Post-Harvest Regrowth Forest

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