scholarly journals Disproportionate CH4 Sink Strength from an Endemic, Sub-Alpine Australian Soil Microbial Community

2021 ◽  
Vol 9 (3) ◽  
pp. 606
Author(s):  
Marshall D. McDaniel ◽  
Marcela Hernández ◽  
Marc G. Dumont ◽  
Lachlan J. Ingram ◽  
Mark A. Adams
Keyword(s):  
Vegetation Type ◽  
Soil Microbial Communities ◽  
Sink Strength ◽  
Large Contribution ◽  
Grassland Soils ◽  
Soil Microbial ◽  
Global Soil ◽  
Soil Ecosystem Services ◽  
Carbon Dioxide Co2 ◽  
Bog Soils

Soil-to-atmosphere methane (CH4) fluxes are dependent on opposing microbial processes of production and consumption. Here we use a soil–vegetation gradient in an Australian sub-alpine ecosystem to examine links between composition of soil microbial communities, and the fluxes of greenhouse gases they regulate. For each soil/vegetation type (forest, grassland, and bog), we measured carbon dioxide (CO2) and CH4 fluxes and their production/consumption at 5 cm intervals to a depth of 30 cm. All soils were sources of CO2, ranging from 49 to 93 mg CO2 m−2 h−1. Forest soils were strong net sinks for CH4, at rates of up to −413 µg CH4 m−2 h−1. Grassland soils varied, with some soils acting as sources and some as sinks, but overall averaged −97 µg CH4 m−2 h−1. Bog soils were net sources of CH4 (+340 µg CH4 m−2 h−1). Methanotrophs were dominated by USCα in forest and grassland soils, and Candidatus Methylomirabilis in the bog soils. Methylocystis were also detected at relatively low abundance in all soils. Our study suggests that there is a disproportionately large contribution of these ecosystems to the global soil CH4 sink, which highlights our dependence on soil ecosystem services in remote locations driven by unique populations of soil microbes. It is paramount to explore and understand these remote, hard-to-reach ecosystems to better understand biogeochemical cycles that underpin global sustainability.

scholarly journals Disproportionate CH4 sink strength from an endemic, sub-alpine Australian soil microbial community

2020 ◽  
Author(s):  
M.D. McDaniel ◽  
M. Hernández ◽  
M.G. Dumont ◽  
L.J. Ingram ◽  
M.A. Adams
Keyword(s):  
Microbial Community ◽  
Vegetation Type ◽  
Soil Microbial Communities ◽  
Sink Strength ◽  
Large Contribution ◽  
Grassland Soils ◽  
Soil Microbial ◽  
Alpine Regions ◽  
Key Aspects ◽  
Bog Soils

AbstractSoil-to-atmosphere methane (CH4) fluxes are dependent on opposing microbial processes of production and consumption. Here we use a soil-vegetation gradient in an Australian sub-alpine ecosystem to examine links between composition of soil microbial communities, and the fluxes of greenhouse gases they regulate. For each soil-vegetation type (forest, grassland, and bog), we measured carbon dioxide (CO2) and CH4 fluxes and their production/consumption at 5-cm intervals to a depth of 30 cm. All soils were sources of CO2, ranging from 49-93 mg CO2 m-2 h-1. Forest soils were strong net sinks for CH4 at rates up to −413 µg CH4 m-2 h-1. Grassland soils varied with some soils acting as sources and some as sinks, but overall averaged −97 µg CH4 m-2 h-1. Bog soils were net sources of CH4 (+340 µg CH4 m-2 h-1). Methanotrophs were dominated by USCα in forest and grassland soils, and Candidatus Methylomirabilis sp. in the bog soils. Methylocystis were also detected at relatively low abundance. The potential disproportionately large contribution of these ecosystems to global CH4 oxidation, and poorly understood microbial community regulating it, highlight our dependence on soil ecosystem services in remote locations can be driven by a unique population of soil microbes.Originality-Significance Statement(Identify the key aspects of originality and significance that place the work within the top 10% of current research in environmental microbiology)Novel methanotrophic bacteria have been discovered in recent years, but few studies have examined the total known diversity of methanotrophs together with the net flux of CH4 from soils. We used an ecosystem with a vegetation-soil gradient in the sub-alpine regions of Australia (with extremely strong consumption of atmospheric CH4) to examine microbial and abiotic drivers of CH4 fluxes across this gradient. Recently characterized methanotrophs, either USCα in forest and grassland soils, or oxygenic Candidatus Methylomirabilis sp. in the bog soil were dominant. Methanotrophs belonging to the families Methylococcaceae and Methylocystaceae represented only a small minority of the methanotrophs in this ecosystem.

Soil microbial communities are shaped by vegetation type and park age in cities under cold climate

2017 ◽  
Vol 19 (3) ◽  
pp. 1281-1295 ◽  
Author(s):  
Nan Hui ◽  
Ari Jumpponen ◽  
Gaia Francini ◽  
D. Johan Kotze ◽  
Xinxin Liu ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Vegetation Type ◽  
Soil Microbial Communities ◽  
Cold Climate ◽  
Soil Microbial

Effect of vegetation type on the diversity of soil microbial communities at the new stage Volcanic Lava Platform, Wudalianchi area, Northeast China

2019 ◽  
Vol 39 (21) ◽  
Author(s):  
曹宏杰 CAO Hongjie ◽  
王立民 WANG Limin ◽  
徐明怡 XU Mingyi ◽  
黄庆阳 HUANG Qingyang ◽  
谢立红 XIE Lihong ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Northeast China ◽  
Vegetation Type ◽  
Soil Microbial Communities ◽  
Soil Microbial ◽  
Volcanic Lava

scholarly journals The activity and functions of subarctic soil microbial communities vary across vegetation types

2021 ◽  
Author(s):  
Sirja Viitamaki ◽  
Igor S Pessi ◽  
Anna-Maria Virkkala ◽  
Pekka Niittynen ◽  
Julia Kemppinen ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Vegetation Type ◽  
Mineral Soil ◽  
Soil Layer ◽  
Soil Microbial Communities ◽  
High Latitudes ◽  
Vegetation Types ◽  
Soil Microbial ◽  
Carbon And Nitrogen Content ◽  
Plant Polymer

Global warming changes the activity of soil microbial communities in high latitudes, which might result in higher greenhouse gas emissions. However, these microbial processes involved in GHG production and consumption are not thoroughly understood. We analyzed 116 soil metatranscriptomes from 73 tundra sites and investigated how bacterial and archaeal communities and their functions vary horizontally (i.e. vegetation type) and vertically (i.e. topsoil organic and mineral layers) during the summer season, in soil types that differed in pH, moisture, soil organic matter (SOM), carbon and nitrogen content. Active microbial communities were significantly different in the organic and mineral soil layers. Additionally, the communities differed significantly between the different vegetation types both in the organic and mineral layers. Various plant polymer degraders were particularly active in shrub-dominated ecosystems with high SOM and low pH, whereas less known mixotrophic groups such as Chloroflexi were active in graminoid-dominated soil with lower SOM and higher pH. Additionally, we detected transcripts of alphaproteobacterial methanothrophs, which potentially moderate methane release from tundra soils in deeper soil layer. Our results provide new insights into the diversity and activity of microbial communities of the high-latitudes under climate change.

scholarly journals Impact of Maize Formulated Herbicides Mesotrione and S-Metolachlor, Applied Alone and in Mixture, on Soil Microbial Communities.

ISRN Ecology ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Pierre Joly ◽  
Pascale Besse-Hoggan ◽  
Frédérique Bonnemoy ◽  
Isabelle Batisson ◽  
Jacques Bohatier ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Microbial Activity ◽  
Synergetic Effect ◽  
Soil Microbial Communities ◽  
Soil Microbial Activity ◽  
Soil Microbial ◽  
Lower Weight ◽  
Global Soil ◽  
The Impact

In order to reduce the amounts of pesticides used, and thereby their associated risks, new generations of less environmentally dangerous molecules with lower weight are currently being used in the mixtures sprayed on crops. Few studies have been made, however, to analyse their impact on the soil, and more particularly on the microorganisms living in the soil which maintain the essential functions of this ecosystem. By taking a microcosmic approach, we were able to assess the impact of the maize herbicides “cocktail” Mesotrione and S-metolachlor on global soil microbial activity, biomass, and structures, by using the formulated compounds, respectively, Callisto and Dual Gold (both registered brands of Syngenta). Our results highlighted a synergetic effect in “cocktail” microcosms resulting in an increase in the Mesotrione herbicide dissipation time and in an impact on the microbial community at onefold field rate equally to more than a single herbicide used at tenfold field rate.

scholarly journals Denaturing gradient gel electrophoresis and multi-SIR profiles of soil microbial communities from a karst doline at Aggtelek National Park, Hungary

2020 ◽  
Author(s):  
Márton Mucsi ◽  
Gergely Krett ◽  
Tibor Szili-Kovács ◽  
János Móga ◽  
Andrea K. Borsodi
Keyword(s):  
Microbial Communities ◽  
Bacterial Communities ◽  
Gel Electrophoresis ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Vegetation Type ◽  
Carbon Sources ◽  
Soil Microbial Communities ◽  
Rrna Gene ◽  
Soil Microbial ◽  
Gradient Gel Electrophoresis

Abstract Soils play an important role in the ecosystem of karstic landscapes both as a buffer zone and as a source of acidity to belowground water. Although the microbiota of karstic soils is known to have a great effect on karstification processes, the activity and composition of these communities are largely unknown. This study gives a comparative analysis of soil microbial profiles from different parts of a doline located at Aggtelek, Hungary. The aim was to reveal the relationships between the vegetation type and genetic fingerprints and substrate utilisation (multi-SIR) profiles of the soil microbiota. Soil samples were collected in early and late springs along a transect in a doline covered with different types of vegetation. Genetic fingerprints of bacterial communities were examined by denaturing gradient gel electrophoresis (DGGE) based on the 16S rRNA gene, along with multi-SIR profiles of the microbial communities measured by the MicroResp method using 15 different carbon sources. Genetic fingerprinting indicated that vegetation cover had a strong effect on the composition of soil bacterial communities. Procrustean analysis showed only a weak connection between DGGE and multi-SIR profiles, probably due to the high functional redundancy of the communities. Seasonality had a significant effect on substrate usage, which can be an important factor to consider in future studies.

Sign in / Sign up

Export Citation Format

Share Document