scholarly journals Plant Litter Type Dictates Microbial Communities Responsible for Greenhouse Gas Production in Amended Lake Sediments

2018 ◽  
Vol 9 ◽  
Author(s):  
Kurt M. Yakimovich ◽  
Erik J. S. Emilson ◽  
Michael A. Carson ◽  
Andrew J. Tanentzap ◽  
Nathan Basiliko ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Greenhouse Gas ◽  
Lake Sediments ◽  
Gas Production ◽  
Plant Litter ◽  
Litter Type

The microbial communities and potential greenhouse gas production in boreal acid sulphate, non-acid sulphate, and reedy sulphidic soils

2014 ◽  
Vol 466-467 ◽  
pp. 663-672 ◽  
Author(s):  
Miloslav Šimek ◽  
Seija Virtanen ◽  
Asko Simojoki ◽  
Alica Chroňáková ◽  
Dana Elhottová ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Greenhouse Gas ◽  
Gas Production ◽  
Acid Sulphate

scholarly journals Greenhouse gas production in low-latitude lake sediments responds strongly to warming

2014 ◽  
Vol 4 (6) ◽  
pp. 467-470 ◽  
Author(s):  
H. Marotta ◽  
L. Pinho ◽  
C. Gudasz ◽  
D. Bastviken ◽  
L. J. Tranvik ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Lake Sediments ◽  
Gas Production ◽  
Low Latitude

scholarly journals Substrate potential of Eemian to Holocene permafrost organic matter for future microbial greenhouse gas production

2017 ◽  
Author(s):  
Janina G. Stapel ◽  
Georg Schwamborn ◽  
Lutz Schirrmeister ◽  
Brian Horsfield ◽  
Kai Mangelsdorf
Keyword(s):  
Organic Matter ◽  
Microbial Communities ◽  
Greenhouse Gas ◽  
Gas Production ◽  
Last Interglacial ◽  
Gas Generation ◽  
The Holocene ◽  
Substrate Potential ◽  
Mis 3 ◽  
Mis 5E

Abstract. Multiple permafrost cores from Bol'shoy Lyakhovsky Island in NE Siberia comprising deposits from Eemian to modern time are investigated to evaluate the stored potential of the freeze-locked organic matter (OM) to serve as substrate for the production of microbial greenhouse gases from thawing permafrost deposits. Deposits from Late Pleistocene glacial periods (comprising MIS 3 and MIS 4) possess an increased aliphatic character and a higher amount of potential substrates, and therefore higher OM quality in terms of biodegradation compared to interglacial deposits from the Eemian (MIS 5e) as well as from the Holocene (MIS 1). To assess the potential of the individual permafrost deposits to provide substrates for microbially induced greenhouse gas generation, concentrations of free and bound acetate as an excellent substrate for methanogenesis are used. The highest free (in pore water and segregated ice) and bound (bound to the organic matrix) acetate-substrate pools of the permafrost deposits are observed within the interstadial MIS 3 and stadial MIS 4 period deposits. In contrast, deposits from the last interglacial MIS 5e show only poor substrate pools. The Holocene deposits reveal a significant bound-acetate pool, representing at least a future substrate potential upon release during OM degradation. Biomarkers for past microbial communities (branched and isoprenoid GDGTs) show also highest abundance of past microbial communities during the MIS 3 and MIS 4 deposits, which indicates higher OM quality with respect to microbial degradation during time of deposition. On a broader perspective, Arctic warming will increase permafrost thaw and favour substrate availability from freeze-locked older permafrost deposits. Therefore, especially those deposits from MIS 3 and MIS 4 show a high potential for providing substrates relevant for methanogenesis.

scholarly journals Dissolved organic carbon, CO2, and CH4 concentrations and their stable isotope ratios in thermokarst lakes on the Qinghai-Tibetan Plateau

2016 ◽  
Author(s):  
Cuicui Mu ◽  
Tingjun Zhang ◽  
Qingbai Wu ◽  
Xiaoqing Peng ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tibetan Plateau ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Greenhouse Gas ◽  
Lake Sediments ◽  
Thermal Stratification ◽  
Gas Production ◽  
Stable Isotope Ratios ◽  
Thermokarst Lakes

<p>Thermokarst lakes are widely distributed on the Qinghai-Tibetan Plateau (QTP), which accounts for 8% of the global permafrost area. These lakes probably promote organic matter biodegradation and thus accelerate the emission of carbon-based greenhouse gases. However, little is known about greenhouse gas concentrations and their stable isotopes characteristics of these lakes. In this study, we measured the concentrations of dissolved organic carbon (DOC), dissolved CO<sub>2</sub> and CH<sub>4</sub>, as well as the distribution of δ<sup>13</sup>C<sub>C</sub><sub>O2</sub>, δ<sup>13</sup>C<sub>C</sub><sub>H4</sub>, and δ<sup>13</sup>C<sub>OM</sub> (organic matter) of lake sediments in thermokarst lakes on the QTP. Results showed that the OM of the lake sediments was highly decomposed. The concentrations of DOC, CO<sub>2</sub> and CH<sub>4</sub> in the lake water on the QTP were 1.2–49.6 mg L<sup>–1</sup>, 3.6–45.0 μmol L<sup>–1</sup> and 0.28–3.0 μmol L<sup>–1</sup>, respectively. The highest CO<sub>2</sub> and CH<sub>4</sub> concentrations were recorded in July while the lowest values in September, which suggested that temperature had an effect on greenhouse gas production, although this pattern may also relate to thermal stratification of the water column. The results implied that thermokast lakes should be paid more attention to regarding carbon cycle and greenhouse gas emissions on the QTP.</p>

scholarly journals Pyrolysis biochar has negligible effects on soil greenhouse gas production, microbial communities, plant germination, and initial seedling growth

Chemosphere ◽  
2019 ◽  
Vol 228 ◽  
pp. 565-576 ◽  
Author(s):  
Elizabeth Meschewski ◽  
Nancy Holm ◽  
Brajendra K. Sharma ◽  
Kurt Spokas ◽  
Nicole Minalt ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Greenhouse Gas ◽  
Seedling Growth ◽  
Gas Production ◽  
Plant Germination

scholarly journals Linking Nitrogen Load to the Structure and Function of Wetland Soil and Rhizosphere Microbial Communities

mSystems ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Eric R. Hester ◽  
Sarah F. Harpenslager ◽  
Josepha M. H. van Diggelen ◽  
Leon L. Lamers ◽  
Mike S. M. Jetten ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Greenhouse Gas ◽  
Nitrogen Availability ◽  
Management Strategies ◽  
Gas Production ◽  
Wetland Soil ◽  
Wetland Plant ◽  
Gas Fluxes ◽  
And Function ◽  
Future Management

Microorganisms living within the rhizospheres of wetland plants significantly contribute to greenhouse gas emissions. Understanding how microbes produce these gases under conditions that have been imposed by human activities (i.e., nitrogen pollution) is important to the development of future management strategies. Our results illustrate that within the rhizosphere of the wetland plantJuncus acutiflorus, physiological differences associated with nitrogen availability can influence microbial activity linked to greenhouse gas production. By pairing taxonomic information and environmental conditions like nitrogen availability with functional outputs of a system such as greenhouse gas fluxes, we present a framework to link certain taxa to both nitrogen load and greenhouse gas production. We view this type of combined information as essential in moving forward in our understanding of complex systems such as rhizosphere microbial communities.

scholarly journals Greenhouse gas production and lipid biomarker distribution in Yedoma and Alas thermokarst lake sediments in Eastern Siberia

2021 ◽  
Author(s):  
Loeka L. Jongejans ◽  
Susanne Liebner ◽  
Christian Knoblauch ◽  
Kai Mangelsdorf ◽  
Mathias Ulrich ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Lake Sediments ◽  
Gas Production ◽  
Eastern Siberia ◽  
Thermokarst Lake ◽  
Lipid Biomarker

Processes affecting greenhouse gas production in experimental boreal reservoirs

2013 ◽  
Vol 27 (2) ◽  
pp. 567-577 ◽  
Author(s):  
Jason J. Venkiteswaran ◽  
Sherry L. Schiff ◽  
Vincent L. St. Louis ◽  
Cory J. D. Matthews ◽  
Natalie M. Boudreau ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Gas Production
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