Long term repeated burning in a wet sclerophyll forest reduces fungal and bacterial biomass and responses to carbon substrates

Campbell, Colin D.; Cameron, Clare; Bastias, Brigitte A.; Chen, Chengrong; Cairney, John

doi:10.1016/j.soilbio.2008.04.020

Cited by 63 publications

(47 citation statements)

References 35 publications

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“…A previous study in the same wet sclerophyll forest has shown that microbial biomass of soil fungi and bacteria significantly decreased in the biennially burnt plots (Campbell et al, 2008). Meanwhile, Bastias et al (2006a, b) found that the biennially burnt treatments shifted the community composition of ectomycorrhizal fungi substantially.…”

Section: Introductionmentioning

confidence: 89%

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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Section: Introductionmentioning

confidence: 89%

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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“…Indeed, soil microbial diversity differs considerably among the fire treatment regimes at this site (Bastias et al, 2006;Campbell et al, 2008). The stoichiometry of microbial extracelluar enzyme activity may also be indicative of the stoichiometry of resource conditions and associated nutrient status of the microbial assemblage (Olander & Vitousek, 2000;Sinsabaugh et al, 2009).…”

Section: Prediction 1: Repeated Burning Effects On Litter C : N : P Smentioning

confidence: 99%

High‐frequency fire alters C : N : P stoichiometry in forest litter

Toberman

Chen

Lewis³

et al. 2014

Global Change Biology

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Fire is a major driver of ecosystem change and can disproportionately affect the cycling of different nutrients. Thus, a stoichiometric approach to investigate the relationships between nutrient availability and microbial resource use during decomposition is likely to provide insight into the effects of fire on ecosystem functioning. We conducted a field litter bag experiment to investigate the long-term impact of repeated fire on the stoichiometry of leaf litter C, N and P pools, and nutrient-acquiring enzyme activities during decomposition in a wet sclerophyll eucalypt forest in Queensland, Australia. Fire frequency treatments have been maintained since 1972, including burning every 2 years (2yrB), burning every 4 years (4yrB) and no burning (NB). C : N ratios in freshly fallen litter were 29-42% higher and C : P ratios were 6-25% lower for 2yrB than NB during decomposition, with correspondingly lower 2yrB N : P ratios (27-32) than for NB (34-49). Trends in litter soluble and microbial N : P ratios were similar to the overall litter N : P ratios across fire treatments. Consistent with these, the ratio of activities for N-acquiring to P-acquiring enzymes in litter was higher for 2yrB than NB, whereas 4yrB was generally intermediate between 2yrB and NB. Decomposition rates of freshly fallen litter were significantly lower for 2yrB (72 AE 2% mass remaining at the end of experiment) than for 4yrB (59 AE 3%) and NB (62 AE 3%), a difference that may be related to effects of N limitation, lower moisture content, and/or litter C quality. Results for older mixed-age litter were similar to those for freshly fallen litter although treatment differences were less pronounced. Overall, these findings show that frequent fire (2yrB) decoupled N and P cycling, as manifested in litter C : N : P stoichiometry and in microbial biomass N : P ratio and enzymatic activities. Furthermore, these data indicate that fire induced a transient shift to N-limited ecosystem conditions during the postfire recovery phase.

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“…According to Hart (2005) fire alters the structure of microbial biomass, this being a selection factor in areas exposed to periodic events. Campbell et al (2008) demonstrated in their studies that the use of carbonated substrates decreases with burning of area, suggesting a lower resistance/resilience of the microbial community. Among the substrates that can be influenced by burning of vegetation is arginine, which has a low response in Cerrado and Cerradão soils.…”

Section: Catabolic Diversity Profilementioning

confidence: 99%

Genetic and Functional Diversities of Microbial Communities in Amazonian Soils Under Different Land Uses and Cultivation

Cenciani¹,

Mazzetto²,

Lammel³

et al. 2011

Biomass - Detection, Production and Usage

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Long term repeated burning in a wet sclerophyll forest reduces fungal and bacterial biomass and responses to carbon substrates

Cited by 63 publications

References 35 publications

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

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

High‐frequency fire alters C : N : P stoichiometry in forest litter

Genetic and Functional Diversities of Microbial Communities in Amazonian Soils Under Different Land Uses and Cultivation

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