Abundance, diversity, viability, and factorial ecology of fungi in peatbogs

Golovchenko, A. V.; Кураков, А. В.; Семенова, Т. А.; Zvyagintsev, D. G.

doi:10.1134/s1064229313010031

Cited by 20 publications

(5 citation statements)

References 51 publications

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“…Fungal spores pass into a state of exogenous dormancy in the catotelm. When in the physiological state of being a spore, fungi can stay dormant for a long time, keeping their viability in the multimeter peat strata and maintaining a high level of “living” carbon reserves in bog ecosystems [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

Microbial Community Structure in Ancient European Arctic Peatlands

Пастухов

Ковалева

Kaverin

2022

Plants

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Northern peatlands, which are crucial reservoirs of carbon and nitrogen (415 ± 150 and 10 ± 7 Pg, respectively), are vulnerable to microbial mineralization after permafrost thaw. This study was carried out in four key sites containing northern permafrost peatland, which are located along the southern cryolithozone. The aim of this study is to characterize amino acids and the microbial community composition in peat strata along a climate gradient. Amino acids and microbiota diversity were studied by liquid chromatography and a quantitative polymerase chain reaction. The share of amino acid fragments was 2.6–7.8, and it is highly significantly correlated (r = 0.87, −0.74 and 0.67, p ˂ 0.05) with the organic nitrogen concentration in the soil, the C/N ratio, and δ15N. The data shows the existence of a large pool of microorganisms concentrated in permafrost peatlands, and a vertical continuum of bacteria, archaea, and microscopic fungi along the peat profile, due to the presence of microorganisms in each layer, throughout all the peat strata. There is no significant correlation between microorganism distribution and the plant macrofossil composition of the peat strata. Determining factors for the development of microorganism abundance are aeration and hydrothermal conditions. The availability of nitrogen will limit the ability of plants and microorganisms to respond to changing environmental conditions; however, with the increased decomposition of organic matter, amino acids will be released as organic sources of nitrogen stored in the protein material of peat-forming plants and microbial communities, which can also affect the organic nitrogen cycle.

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Section: Resultsmentioning

confidence: 99%

Microbial Community Structure in Ancient European Arctic Peatlands

Пастухов

Ковалева

Kaverin

2022

Plants

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“…The greatest length of mycelium and number of large propagules (5–7 μm in diameter) were also shown for the O horizon, where the abundance of organic matter ensures the greatest taxonomic diversity of mycobiota, which is supported by high correlation values r = 0.68–0.72 [ 81 ]. The deeper layers were depleted in fungal propagules due to the lack of organic matter, limited access to the atmospheric oxygen, and the low number of fine roots required for symbiosis [ 82 , 83 ]. The total biomass decreased exponentially down the profile and almost 60% of the total biomass was concentrated in top 5–10 cm.…”

Section: Discussionmentioning

confidence: 99%

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Korneykova

Vasenev

Никитин

et al. 2021

IJERPH

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Urbanization in the Arctic results in considerable and still poorly known environmental consequences. The effect of urbanization on soil microbiome—an ecosystem component highly sensitive to anthropogenic disturbance—remains overlooked for the Arctic region. The research compared chemical and microbial properties of the natural Podzol soils and urban soils of Murmansk—the largest Arctic city. Particular attention was given to the profile distribution, which is almost completely ignored by most microbial studies. Soil microbiome was investigated by the quantitative indicators based on fluorescence microscopy (microbial biomass) and PCR real-time methods (amount of rRNA genes copies of archaea, bacteria, and fungi). The principal changes in urban soils’ properties compared to the natural references included a shift in pH and an increase in C and nutrients’ contents, especially remarkable for the subsoil. The numbers of rRNA genes copies of archaea, bacteria, and fungi in urban topsoils (106–1010, 109–1010, and 107–109, respectively) were lower than in Podzol; however, the opposite pattern was shown for the subsoil. Similarly, the total microbial biomass in urban topsoils (0.55–0.75 mg g−1) was lower compared to the 1.02 mg g−1 in Podzols, while urban subsoil microbial biomass was 2–2.5 times higher than in the natural conditions. Both for urban and natural soils and throughout the profiles, fungi were dominated by mycelium forms; however, the ratios of mycelium–spores were lower, and the amount of thin mycelium was higher in urban soils than in natural Podzols. Urbanization in the Arctic altered soil morphological and chemical properties and created a new niche for microbial development in urban subsoils; its contribution to biodiversity and nutrient cycling promises to become increasingly important under projected climate change.

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“…Soil fungal communities across the globe and in a variety of ecosystems have been exhaustively identified and studied (Shi et al 2014;Newsham et al 2016;Egidi et al 2019) including in peatlands, however, the studies are limited to the bogs (Golovchenko et al 2013;Filippova and Thormann 2014;Morrison et al 2020) and fen (Asemaninejad et al 2017;Mpamah et al 2017;Zhang et al 2017), compared to tropical environments (Juan-Ovejero et al 2020). A few studies carried out in Malaysia have emphasized the sensitivity of soil fungal communities towards conversion of forest to oil palm cultivation (Kerfahi et al 2014;Mcguire et al 2015) compared to bacteria communities (Tin et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Diversity of soil fungal communities under natural and managed peat ecosystems in tropical peatland of Sarawak

Kusai

Ayob

Khairuddin

2022

Preprint

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Fungi are primary decomposers in terrestrial ecosystems which involved in degradation of organic matter, particularly in tropical peatland ecosystem that has high content of organic matter accumulation. Fungi in tropical peatland plays important ecological role in regulating ecosystem functions and services. Understanding soil fungal diversity, composition and structure underlying the tropical peatlands are the preliminary steps to predicting the stability of ecosystem functioning under natural and managed peat ecosystems. The aim of this study was to determine soil fungal diversity and communities in tropical peatland of Sarawak under natural (peat swamp forest, PSF and logged-over secondary forest, LOF) and managed (oil palm plantation, OPP) ecosystems. Fungi from peat samples were isolated and identified based on the 18S rDNA region sequencing. Fungal diversity was measured based on Shannon’s diversity index (H’), Simpson’s diversity index (D), species richness (S) and evenness (E). Bray–Curtis dissimilarity was performed to compare fungal communities between study sites. The fungal diversity measurement indicated that LOF had the highest diversity followed by PSF and OPP. In addition to that, the composition of the fungal communities in LOF resembled PSF, compared to OPP. Distinct fungal communities were observed between PSF and OPP due to the dominance of Aspergillus spp. and Trichoderma spp., respectively. In conclusion, LOF is an important ecosystem to retain relatively high fungal diversity. Different fungal communities were observed, which contained ecologically important fungal groups incorporated into the natural and managed peat ecosystems.

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Abundance, diversity, viability, and factorial ecology of fungi in peatbogs

Cited by 20 publications

References 51 publications

Microbial Community Structure in Ancient European Arctic Peatlands

Microbial Community Structure in Ancient European Arctic Peatlands

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Diversity of soil fungal communities under natural and managed peat ecosystems in tropical peatland of Sarawak

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