Recovery in fungal biomass is related to decrease in soil organic matter turnover time in a boreal fire chronosequence

Köster, Kajar; Berninger, Frank; Lindén, Aki; Köster, Egle; Pumpanen, Jukka

doi:10.1016/j.geoderma.2014.07.001

Cited by 64 publications

(82 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The samples were frozen at Ϫ180°C in liquid nitrogen within a few hours after collection and transported to the laboratory on dry ice for subsequent DNA isolation. The soil microbial biomass was estimated by measuring the ergosterol content from the samples collected from the humus layer (14).…”

Section: Methodsmentioning

confidence: 99%

“…Soil C and N contents were measured with an elemental analyzer (vario MAX CN elemental analyzer; Elementar Analysensysteme GmbH, Germany) after the soil samples were dried and passed through a 2-mm-pore-size mesh sieve. The soil temperature and water content were also measured at each sampling site, as previously described (14).…”

Section: Methodsmentioning

confidence: 99%

“…Detailed investigations of long-term changes in microbial community dynamics following fires are rare, especially for fungi. The recovery of fungal biomass has been reported to be related to a decrease in SOM turnover time in a boreal fire chronosequence (14). Previous studies have shown that the increase in soil pH after fire favors bacteria (15) and reduces the richness and diversity of mycorrhizal fungi (16,17).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Fungal Community Shifts in Structure and Function across a Boreal Forest Fire Chronosequence

Sun

Santalahti

Pumpanen

et al. 2015

Appl Environ Microbiol

Self Cite

126

View full text Add to dashboard Cite

Forest fires are a common natural disturbance in forested ecosystems and have a large impact on the microbial communities in forest soils. The response of soil fungal communities to forest fire is poorly documented. Here, we investigated fungal community structure and function across a 152-year boreal forest fire chronosequence using high-throughput sequencing of the internal transcribed spacer 2 (ITS2) region and a functional gene array (GeoChip). Our results demonstrate that the boreal forest soil fungal community was most diverse soon after a fire disturbance and declined over time. The differences in the fungal communities were explained by changes in the abundance of basidiomycetes and ascomycetes. Ectomycorrhizal (ECM) fungi contributed to the increase in basidiomycete abundance over time, with the operational taxonomic units (OTUs) representing the genera Cortinarius and Piloderma dominating in abundance. Hierarchical cluster analysis by using gene signal intensity revealed that the sites with different fire histories formed separate clusters, suggesting differences in the potential to maintain essential biogeochemical soil processes. The site with the greatest biological diversity had also the most diverse genes. The genes involved in organic matter degradation in the mature forest, in which ECM fungi were the most abundant, were as common in the youngest site, in which saprotrophic fungi had a relatively higher abundance. This study provides insight into the impact of fire disturbance on soil fungal community dynamics. Boreal forest soils play an important role in the global carbon cycle (1) and are a net sink for atmospheric CO 2 (2, 3). Approximately 16% of the terrestrial carbon (C) stock is estimated to be stored in the boreal forest ecosystem (1). Fire is a natural disturbance in most forest ecosystems (4), and about 1% of the boreal forest burns annually (5). The frequency of forest fires in the northern boreal zone is expected to increase because of rising temperatures and more frequent dry periods resulting from ongoing climate change (6).Soil microbes perform essential ecological functions in forested ecosystems via nutrient cycling and decomposition of organic matter. Microbial activities control the turnover of organic C in soil and thus contribute to global C cycling (7). Fungi are the predominant decomposers in boreal soils and play a central role in the turnover of carbon and nitrogen (8). Ectomycorrhizal fungi form symbioses with both trees and ground vegetation in boreal forests. Many species of ground vegetation can additionally form symbioses with ericoid mycorrhizal fungi. Boreal forest ecosystem productivity is linked to plant nutrient acquisition from the microbial community via soil organic matter (SOM) decomposition. Forest fires result in the loss of mycorrhizal host plants and may modify the SOM chemistry, leading to dramatic changes in soil microbial activity (9, 10). Fire disturbance often increases soil pH and causes changes in soil temperature due to loss of canopy cover, bo...

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Fungal Community Shifts in Structure and Function across a Boreal Forest Fire Chronosequence

Sun

Santalahti

Pumpanen

et al. 2015

Appl Environ Microbiol

Self Cite

126

View full text Add to dashboard Cite

show abstract

“…During and after fires, significant changes take place in the forest ecosystems, including the soil. These changes include (i) a significant amount of biomass is combusted, and large amounts of carbon and nitrogen are released to the atmosphere in the form of carbon dioxide and other gases or particles (Harden et al, 2000;Andreae and Merlet, 2001;Kaiser et al, 2012;Konovalov et al, 2014;; (ii) fire alters the microbial community structure in the soil as well as the structure of the vegetation (Dooley and Treseder, 2012;Sun et al, 2015); (iii) fires determine the structure of the vegetation, succession dynamics and the fragmentation of forest cover, tree species composition, and the productivity of boreal forests (Gewehr et al, 2014), and (iv) fire is one of the crucial drivers controlling the dynamics of the carbon stock of boreal forests (Jonsson and Wardle, 2010;Köster et al, 2014).…”

Section: Natural Hazards Extreme Weather and Fire Occurrencementioning

confidence: 99%

Pan-Eurasian Experiment (PEEX): towards a holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the northern Eurasian region

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract. The northern Eurasian regions and Arctic Ocean will very likely undergo substantial changes during the next decades. The Arctic-boreal natural environments play a crucial role in the global climate via albedo change, carbon sources and sinks as well as atmospheric aerosol production from biogenic volatile organic compounds. Furthermore, it is expected that global trade activities, demographic movement, and use of natural resources will be increasing in the Arctic regions. There is a need for a novel research approach, which not only identifies and tackles the relevant multi-disciplinary research questions, but also is able to make a holistic system analysis of the expected feedbacks. In this paper, we introduce the research agenda of the Pan-Eurasian Experiment (PEEX), a multi-scale, multi-disciplinary and international program started in 2012 (https://www.atm.helsinki.fi/peex/). PEEX sets a research approach by which large-scale research topics are investigated from a system perspective and which aims to fill the key gaps in our understanding of the feedbacks and interactions between the land-atmosphereaquatic-society continuum in the northern Eurasian region. We introduce here the state of the art for the key topics in the PEEX research agenda and present the future prospects of the research, which we see relevant in this context.

show abstract

“…The total C storage of the soil is 7 kg m -2 ) and it has been formed during the last 7000 years. Frequent forest fires have an influence on soil C recovery and turnover time (Köster et al, 2014) and the last occasion the SMEAR II forest site was burned was in 1962 when the cutting residues were slash burned on site.…”

Section: Measurement Sitementioning

confidence: 99%

Boreal forest soil is a significant and diverse source of volatile organic compounds

Mäki

Aaltonen

Heinonsalo

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Vegetation emissions of volatile organic compounds (VOCs) are intensively studied world-wide because oxidation products of VOCs contribute to atmospheric processes, but the quantities by which different species of VOCs are produced by soil, or how effectively belowground VOCs are released into the atmosphere from soil remains largely unknown. This is the first published study that measures belowground VOC concentrations at different depths in a podzol combined with simultaneous soil surface flux measurements in a boreal coniferous forest. More than 50 VOCs, dominated by monoterpenes 15 and sesquiterpenes, were detected in the air space in the soil during the two measurement campaigns. Organic forest soil was a significant monoterpene source as it contained fresh isoprenoid-rich litter, and the concentrations of monoterpenes were comparable to the VOC concentrations in the air above the coniferous forest. Belowground monoterpene concentrations were largely decoupled from forest floor monoterpene fluxes; thus, it seems that production processes and storages of VOCs partly differ from those VOCs that are simultaneously emitted from the soil surface. Relatively high isoprenoid concentrations were 20 measured under snow cover, which indicates that snow and ice cover hinders gas diffusion and causes belowground accumulation of VOCs when the activity of vegetation is very low.

show abstract

Recovery in fungal biomass is related to decrease in soil organic matter turnover time in a boreal fire chronosequence

Cited by 64 publications

References 70 publications

Fungal Community Shifts in Structure and Function across a Boreal Forest Fire Chronosequence

Fungal Community Shifts in Structure and Function across a Boreal Forest Fire Chronosequence

Pan-Eurasian Experiment (PEEX): towards a holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the northern Eurasian region

Boreal forest soil is a significant and diverse source of volatile organic compounds

Contact Info

Product

Resources

About