Can a red wood-ant nest be associated with fault-related CH4 micro-seepage?

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dc.contributor.authorBerberich, Gabriele M.
dc.contributor.authorEllison, Aaron M.
dc.contributor.authorBerberich, Martin B.
dc.contributor.authorGrumpe, Arne
dc.contributor.authorBecker, Adrian
dc.contributor.authorWöhler, Christian
dc.date.accessioned2019-12-19T13:31:52Z
dc.date.available2019-12-19T13:31:52Z
dc.date.issued2018-03-28
dc.description.abstractWe measured methane (CH4) and stable carbon isotope of methane (δ13C-CH4) concentrations in ambient air and within a red wood-ant (RWA; Formica polyctena) nest in the Neuwied Basin (Germany) using high-resolution in-situ sampling to detect microbial, thermogenic, and abiotic fault-related micro-seepage of CH4. Methane degassing from RWA nests was not synchronized with earth tides, nor was it influenced by micro-earthquake degassing or concomitantly measured RWA activity. Two δ13C-CH4 signatures were identified in nest gas: −69‰ and −37‰. The lower peak was attributed to microbial decomposition of organic matter within the RWA nest, in line with previous observations that RWA nests are hot-spots of microbial CH4. The higher peak has not been reported in previous studies. We attribute this peak to fault-related CH4 emissions moving via fault networks into the RWA nest, which could originate either from thermogenic or abiotic CH4 formation. Sources of these micro-seepages could be Devonian schists, iron-bearing “Klerf Schichten”, or overlapping micro-seepage of magmatic CH4 from the Eifel plume. Given the abundance of RWA nests on the landscape, their role as sources of microbial CH4 and biological indicators for abiotically-derived CH4 should be included in estimation of methane emissions that are contributing to climatic change.en
dc.identifier.urihttp://hdl.handle.net/2003/38459
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-20378
dc.language.isoende
dc.relation.ispartofseriesAnimals;Jg.: 8, Heft: 4 | S. 46-1-46-19
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectRed wood antsen
dc.subjectFormica polyctenaen
dc.subjectCH4; δ 13C-CH4en
dc.subjectFaulten
dc.subjectActivity patternen
dc.subject.ddc620
dc.titleCan a red wood-ant nest be associated with fault-related CH4 micro-seepage?en
dc.title.alternativeA case study from continuous short-term in-situ samplingen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationAnimals. Jg. 8, 2018, Heft 4 | S. 46-1-46-19de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.3390/ani8040046de

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