Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta
<p>Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH<span class="inline-formula"><sub>4</sub></spa...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-06-01
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| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/20/2049/2023/bg-20-2049-2023.pdf |
| _version_ | 1827932129468612608 |
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| author | M. Laurent M. Fuchs T. Herbst A. Runge S. Liebner S. Liebner C. C. Treat |
| author_facet | M. Laurent M. Fuchs T. Herbst A. Runge S. Liebner S. Liebner C. C. Treat |
| author_sort | M. Laurent |
| collection | DOAJ |
| description | <p>Soils in the permafrost region have acted as carbon sinks
for thousands of years. As a result of global warming, permafrost soils are
thawing and will potentially release greenhouse gases (GHGs) such as methane
(CH<span class="inline-formula"><sub>4</sub></span>) and carbon dioxide (CO<span class="inline-formula"><sub>2</sub></span>). However, small-scale spatial
heterogeneities of GHG production have been neglected in previous incubation
studies. Here, we used an anaerobic incubation experiment to simulate
permafrost thaw along a transect from upland Yedoma to the floodplain on
Kurungnakh Island. Potential CO<span class="inline-formula"><sub>2</sub></span> and CH<span class="inline-formula"><sub>4</sub></span> production was measured
during incubation of the active layer and permafrost soils at 4
and 20 <span class="inline-formula"><sup>∘</sup></span>C, first for 60 d (approximate length of the growing
season) and then continuing for 1 year. An assessment of methanogen
abundance was performed in parallel for the first 60 d. Yedoma samples
from upland and slope cores remained in a lag phase during the growing
season simulation, while those located in the floodplain showed high
production of CH<span class="inline-formula"><sub>4</sub></span> (<span class="inline-formula">6.5×10<sup>3</sup></span> <span class="inline-formula">µ</span>g CH<span class="inline-formula"><sub>4</sub></span>-C g<span class="inline-formula"><sup>−1</sup></span> C) and
CO<span class="inline-formula"><sub>2</sub></span> (<span class="inline-formula">6.9×10<sup>3</sup></span> <span class="inline-formula">µ</span>g CO<span class="inline-formula"><sub>2</sub></span>-C g<span class="inline-formula"><sup>−1</sup></span> C) at 20 <span class="inline-formula"><sup>∘</sup></span>C. The
Yedoma samples from the permafrost layer started producing CH<span class="inline-formula"><sub>4</sub></span> after
6 months of incubation. We conclude that landscape position is a key
factor triggering CH<span class="inline-formula"><sub>4</sub></span> production during the growing season time on
Kurungnakh Island.</p> |
| first_indexed | 2024-03-13T07:04:09Z |
| format | Article |
| id | doaj.art-2bd7badbc265482e848da469156814c7 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-03-13T07:04:09Z |
| publishDate | 2023-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-2bd7badbc265482e848da469156814c72023-06-06T13:08:34ZengCopernicus PublicationsBiogeosciences1726-41701726-41892023-06-01202049206410.5194/bg-20-2049-2023Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena DeltaM. Laurent0M. Fuchs1T. Herbst2A. Runge3S. Liebner4S. Liebner5C. C. Treat6Permafrost section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, GermanyPermafrost section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, GermanyPermafrost section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, GermanyPermafrost section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, GermanyGFZ German Research Centre for Geosciences, Section Geomicrobiology, Potsdam, GermanyUniversity of Potsdam, Institute for Biochemistry and Biology, Potsdam, GermanyPermafrost section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany<p>Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH<span class="inline-formula"><sub>4</sub></span>) and carbon dioxide (CO<span class="inline-formula"><sub>2</sub></span>). However, small-scale spatial heterogeneities of GHG production have been neglected in previous incubation studies. Here, we used an anaerobic incubation experiment to simulate permafrost thaw along a transect from upland Yedoma to the floodplain on Kurungnakh Island. Potential CO<span class="inline-formula"><sub>2</sub></span> and CH<span class="inline-formula"><sub>4</sub></span> production was measured during incubation of the active layer and permafrost soils at 4 and 20 <span class="inline-formula"><sup>∘</sup></span>C, first for 60 d (approximate length of the growing season) and then continuing for 1 year. An assessment of methanogen abundance was performed in parallel for the first 60 d. Yedoma samples from upland and slope cores remained in a lag phase during the growing season simulation, while those located in the floodplain showed high production of CH<span class="inline-formula"><sub>4</sub></span> (<span class="inline-formula">6.5×10<sup>3</sup></span> <span class="inline-formula">µ</span>g CH<span class="inline-formula"><sub>4</sub></span>-C g<span class="inline-formula"><sup>−1</sup></span> C) and CO<span class="inline-formula"><sub>2</sub></span> (<span class="inline-formula">6.9×10<sup>3</sup></span> <span class="inline-formula">µ</span>g CO<span class="inline-formula"><sub>2</sub></span>-C g<span class="inline-formula"><sup>−1</sup></span> C) at 20 <span class="inline-formula"><sup>∘</sup></span>C. The Yedoma samples from the permafrost layer started producing CH<span class="inline-formula"><sub>4</sub></span> after 6 months of incubation. We conclude that landscape position is a key factor triggering CH<span class="inline-formula"><sub>4</sub></span> production during the growing season time on Kurungnakh Island.</p>https://bg.copernicus.org/articles/20/2049/2023/bg-20-2049-2023.pdf |
| spellingShingle | M. Laurent M. Fuchs T. Herbst A. Runge S. Liebner S. Liebner C. C. Treat Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta Biogeosciences |
| title | Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
| title_full | Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
| title_fullStr | Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
| title_full_unstemmed | Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
| title_short | Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta |
| title_sort | relationships between greenhouse gas production and landscape position during short term permafrost thaw under anaerobic conditions in the lena delta |
| url | https://bg.copernicus.org/articles/20/2049/2023/bg-20-2049-2023.pdf |
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