Substantial carbon loss respired from a corn–soybean agroecosystem highlights the importance of careful management as we adapt to changing climate

Moore, Caitlin E; Gibson, Christy D; Miao, Guofang; Dracup, Evan C; Gomez-Casanovas, Nuria; Masters, Michael D; Miller, Jesse; C von Haden, Adam; Meyers, Tilden; DeLucia, Evan H; Bernacchi, Carl J

doi:10.1088/1748-9326/ac661a

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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Substantial carbon loss respired from a corn–soybean agroecosystem highlights the importance of careful management as we adapt to changing climate

2022
By Moore, Caitlin E ; Gibson, Christy D ; Miao, Guofang ; ...
Source: Environmental Research Letters, 17(5), 054029

[PDF-1.01 MB]

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Journal Title:

Environmental Research Letters
Personal Author:

Moore, Caitlin E ; Gibson, Christy D ; Miao, Guofang ; Dracup, Evan C ; Gomez-Casanovas, Nuria ; ... More +

Moore, Caitlin E ; Gibson, Christy D ; Miao, Guofang ; Dracup, Evan C ; Gomez-Casanovas, Nuria ; Masters, Michael D ; Miller, Jesse ; C von Haden, Adam ; Meyers, Tilden ; DeLucia, Evan H ; Bernacchi, Carl J Less -
NOAA Program & Office:

ARL (Air Resources Laboratory) ; OAR (Oceanic and Atmospheric Research)

ARL (Air Resources Laboratory) ; OAR (Oceanic and Atmospheric Research) Less -
Description:

Understanding agroecosystem carbon (C) cycle response to climate change and management is vital for maintaining their long-term C storage. We demonstrate this importance through an in-depth examination of a ten-year eddy covariance dataset from a corn–corn–soybean crop rotation grown in the Midwest United States. Ten-year average annual net ecosystem exchange (NEE) showed a net C sink of −0.39 Mg C ha−1 yr−1. However, NEE in 2014 and 2015 from the corn ecosystem was 3.58 and 2.56 Mg C ha−1 yr−1, respectively. Most C loss occurred during the growing season, when photosynthesis should dominate and C fluxes should reflect a net ecosystem gain. Partitioning NEE into gross primary productivity (GPP) and ecosystem respiration (ER) showed this C ‘burp’ was driven by higher ER, with a 51% (2014) and 57% (2015) increase from the ten-year average (15.84 Mg C ha−1 yr−1). GPP was also higher than average (16.24 Mg C ha−1 yr−1) by 25% (2014) and 37% (2015), but this was not enough to offset the C emitted from ER. This increased ER was likely driven by enhanced soil microbial respiration associated with ideal growing season climate, substrate availability, nutrient additions, and a potential legacy effect from drought.
Keywords:

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General Environmental Science Public Health, Environmental And Occupational Health Renewable Energy, Sustainability And The Environment
Source:

Environmental Research Letters, 17(5), 054029
DOI:

https://doi.org/10.1088/1748-9326/ac661a
ISSN:

1748-9326
Format:

PDF
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IOP Publishing
Document Type:

Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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urn:sha-512:204eac131bd06d7969bcb126eed645568fbbd6376973483b21264ab8623a532d0104687de7abf2a222b0969fa0a000fa7ff1492c312b10fb597d4b22c4086d69
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https://repository.library.noaa.gov/view/noaa/64051/noaa_64051_DS1.pdf
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Substantial carbon loss respired from a corn–soybean agroecosystem highlights the importance of careful management as we adapt to changing climate

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