2020
DOI: 10.1038/s41467-020-18763-4
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Plant species determine tidal wetland methane response to sea level rise

Abstract: Blue carbon (C) ecosystems are among the most effective C sinks of the biosphere, but methane (CH4) emissions can offset their climate cooling effect. Drivers of CH4 emissions from blue C ecosystems and effects of global change are poorly understood. Here we test for the effects of sea level rise (SLR) and its interactions with elevated atmospheric CO2, eutrophication, and plant community composition on CH4 emissions from an estuarine tidal wetland. Changes in CH4 emissions with SLR are primarily mediated by s… Show more

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Cited by 39 publications
(34 citation statements)
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“…alterni ora may also have been related to plant traits that regulate CH 4 emissions by in uencing the balance between CH 4 production and oxidation (Sutton-Grier and , Mueller et al 2020), which itself is in uenced by traits that affect CH 4 transport through plants (Komiya et al 2020). Mueller et al (2020) proposed that plant traits vary across species such that some push the balance between these opposing processes toward net CH 4 production while others favor net CH 4 oxidation. We hypothesize that among the dominant species present at the site, S. alterni ora favors net CH 4 production while J. roemerianus favors net CH 4 oxidation, and that the lower CH 4 emissions rates in the J. roemerianus strata may have been due to relatively high rates of root oxygen loss by J.…”
Section: Discussionmentioning
confidence: 99%
“…alterni ora may also have been related to plant traits that regulate CH 4 emissions by in uencing the balance between CH 4 production and oxidation (Sutton-Grier and , Mueller et al 2020), which itself is in uenced by traits that affect CH 4 transport through plants (Komiya et al 2020). Mueller et al (2020) proposed that plant traits vary across species such that some push the balance between these opposing processes toward net CH 4 production while others favor net CH 4 oxidation. We hypothesize that among the dominant species present at the site, S. alterni ora favors net CH 4 production while J. roemerianus favors net CH 4 oxidation, and that the lower CH 4 emissions rates in the J. roemerianus strata may have been due to relatively high rates of root oxygen loss by J.…”
Section: Discussionmentioning
confidence: 99%
“…Methane (CH 4 ) is a potent greenhouse gas that contributes to 15 %-19 % of total greenhouse gas radiative forcing (IPCC, 2013) and has a sustained-flux global warming potential that is 45 times that of CO 2 on a 100-year timescale (Neubauer and Megonigal, 2015). Wetlands are the largest natural source of CH 4 to the atmosphere and were recently identified as the largest source of uncertainty in the global CH 4 budget (Saunois et al, 2016).…”
Section: Introductionmentioning
confidence: 99%
“…Root exudates can also decrease CH 4 oxidation by stimulating use of O 2 by other aerobic microbes (Lenzewski et al, 2018;Mueller et al, 2016). Consequently, wetland CH 4 emissions are strongly linked to a wide variety of plant traits that govern the supply of reductive (organic carbon) and oxidative (O 2 ) substrates to soils (Moor et al, 2017;Mueller et al, 2020).…”
Section: Introductionmentioning
confidence: 99%
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“…The specific production and emission mechanism may differ a lot between tidal and non-tidal wetlands. The first major reason for this is that the much higher sulfate concentrations in tidal wetlands allows sulfate-reducing bacteria to outcompete methanogenic communities for electron donors [13]. Thus, as a proxy for sulfate availability, sediment salinity is proved to be closely related with CH4 production in tidal wetlands [11,14].…”
Section: Introductionmentioning
confidence: 99%