Biogeochemistry

Data publications of the Biogeochemistry Research Group at the Institute of Earth Science of Heidelberg University.

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1 to 8 of 8 Results

Stable Carbon Isotope Signature of Methane Released from Phytoplankton [Research Data] Jun 7, 2023 Klintzsch, Thomas; Geisinger, Hannah; Wieland, Anna; Langer, Gerald; Nehrke, Gernot; Bizic, Mina; Greule, Markus; Lenhart, Katharina; Borsch, Christian; Schroll, Moritz; Keppler, Frank, 2023, "Stable Carbon Isotope Signature of Methane Released from Phytoplankton [Research Data]", https://doi.org/10.11588/data/YYLEKU, heiDATA, V1, UNF:6:CUTgXYoCIx59M/OKIgTRvQ== [fileUNF] Aquatic ecosystems play an important role in global methane cycling and many field studies have reported methane supersaturation in the oxic surface mixed layer (SML) of the ocean and in the epilimnion of lakes. The origin of methane formed under oxic condition is hotly debated a...
Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data] Nov 4, 2022 Einzmann, Teresa; Schroll, Moritz; Kleint, Jan Frederik; Greule, Markus; Keppler, Frank, 2022, "Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data]", https://doi.org/10.11588/data/KLFDVF, heiDATA, V1, UNF:6:v5med6vrABS01PP8hfg5JQ== [fileUNF] Methane (CH4) emissions from aquatic systems have recently been comprised to account for up to 50 % of global CH4 emissions, with lakes representing one of the largest CH4 source within this pool. However, there is large uncertainty associated with CH4 emissions from freshwater e...
Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data] Aug 9, 2022 Wieland, Anna; Greule, Markus; Roemer, Philipp; Esper, Jan; Keppler, Frank, 2022, "Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data]", https://doi.org/10.11588/data/ZCMVUY, heiDATA, V1, UNF:6:U4nXcHYDxhl9ro8YQIcHsA== [fileUNF] Stable hydrogen and carbon isotope ratios of wood lignin methoxy groups (δ13CLM and δ2HLM values) have been shown to be reliable proxies of past temperature variations. Previous studies showed that δ2HLM values even work in temperate environments where classical tree-ring width a...
Making plant methane formation visible – insights from application of 13C-labelled dimethyl sulfoxide [Research Data] Apr 25, 2022 Schroll, Moritz; Lenhart, Katharina; Greiner, Steffen; Keppler, Frank, 2022, "Making plant methane formation visible – insights from application of 13C-labelled dimethyl sulfoxide [Research Data]", https://doi.org/10.11588/data/VJFIBD, heiDATA, V1, UNF:6:1Pzn25XuesxTt+Ygdeo4vg== [fileUNF] Methane (CH4) formation by vegetation has been studied intensively over the last 15 years. However, reported CH4 emissions vary by several orders of magnitude, thus making global estimates difficult. Moreover, the mechanism(s) for CH4 formation by plants is (are) largely unknown....
Methane cycling in a eutrophic lake characterised by multiple stable isotope and flux measurements [data] Apr 5, 2022 Schroll, Moritz, 2022, "Methane cycling in a eutrophic lake characterised by multiple stable isotope and flux measurements [data]", https://doi.org/10.11588/data/MU3CON, heiDATA, V1, UNF:6:uMXNN9yPRjWKSRIzJA3uuA== [fileUNF] Recent estimations demonstrate that methane (CH4) emissions from aquatic systems are responsible for up to half of global CH4 emissions. Lakes represent one of the largest CH4 sources, and emissions are predicted to increase due to global warming. However, there is a large uncert...
Effects of temperature and light on methane production of widespread marine Phytoplankton [Dataset] Aug 20, 2020 Klintzsch, Thomas; Keppler, Frank, 2020, "Effects of temperature and light on methane production of widespread marine Phytoplankton [Dataset]", https://doi.org/10.11588/data/AGKWSG, heiDATA, V1, UNF:6:4gqE/aagNenh7Fz17ii/eg== [fileUNF] In the present study we investigated the effects of temperature and light intensity (including daylength) on CH4 formation from three widespread marine algal species Emiliania huxleyi, Phaeocystis globosa and Chrysochromulina sp.. Rates of E. huxleyi increased by 210 % when tempe...
The stable carbon isotope signature of methane produced by saprotrophic fungi [Dataset] Jun 26, 2020 Schroll, Moritz; Keppler, Frank; Greule, Markus; Eckhardt, Christian; Zorn, Holger; Lenhart, Katharina, 2020, "The stable carbon isotope signature of methane produced by saprotrophic fungi [Dataset]", https://doi.org/10.11588/data/DQYPMC, heiDATA, V1, UNF:6:2wuTVqMthe55Z6quzuhvRQ== [fileUNF] Fungi have recently been identified to produce the greenhouse gas methane. Here, we investigated the stable carbon isotope values of methane produced by saprotrophic fungi. Our results show that stable isotope values of methane by fungi are dependent on the fungal species and the...
Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment [Dataset] Oct 24, 2019 Klintzsch, Thomas; Keppler, Frank, 2019, "Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment [Dataset]", https://doi.org/10.11588/data/9N1LSR, heiDATA, V1, UNF:6:dxf+QSeRKu9v6uPyAUhX8Q== [fileUNF] We investigated marine algae as a source of methane (CH4) in oxic surface waters of oceans. The widespread haptophytes Emiliania huxleyi, Phaeocystis globosa and Chrysochromulina sp. were investigated. We performed CH4 production and stable carbon isotope measurements and provide...

Stable Carbon Isotope Signature of Methane Released from Phytoplankton [Research Data]

Jun 7, 2023

Klintzsch, Thomas; Geisinger, Hannah; Wieland, Anna; Langer, Gerald; Nehrke, Gernot; Bizic, Mina; Greule, Markus; Lenhart, Katharina; Borsch, Christian; Schroll, Moritz; Keppler, Frank, 2023, "Stable Carbon Isotope Signature of Methane Released from Phytoplankton [Research Data]", https://doi.org/10.11588/data/YYLEKU, heiDATA, V1, UNF:6:CUTgXYoCIx59M/OKIgTRvQ== [fileUNF]

Aquatic ecosystems play an important role in global methane cycling and many field studies have reported methane supersaturation in the oxic surface mixed layer (SML) of the ocean and in the epilimnion of lakes. The origin of methane formed under oxic condition is hotly debated a...

Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data]

Nov 4, 2022

Einzmann, Teresa; Schroll, Moritz; Kleint, Jan Frederik; Greule, Markus; Keppler, Frank, 2022, "Application of concentration and 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake [data]", https://doi.org/10.11588/data/KLFDVF, heiDATA, V1, UNF:6:v5med6vrABS01PP8hfg5JQ== [fileUNF]

Methane (CH4) emissions from aquatic systems have recently been comprised to account for up to 50 % of global CH4 emissions, with lakes representing one of the largest CH4 source within this pool. However, there is large uncertainty associated with CH4 emissions from freshwater e...

Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data]

Aug 9, 2022

Wieland, Anna; Greule, Markus; Roemer, Philipp; Esper, Jan; Keppler, Frank, 2022, "Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees [data]", https://doi.org/10.11588/data/ZCMVUY, heiDATA, V1, UNF:6:U4nXcHYDxhl9ro8YQIcHsA== [fileUNF]

Stable hydrogen and carbon isotope ratios of wood lignin methoxy groups (δ13CLM and δ2HLM values) have been shown to be reliable proxies of past temperature variations. Previous studies showed that δ2HLM values even work in temperate environments where classical tree-ring width a...

Making plant methane formation visible – insights from application of 13C-labelled dimethyl sulfoxide [Research Data]

Apr 25, 2022

Schroll, Moritz; Lenhart, Katharina; Greiner, Steffen; Keppler, Frank, 2022, "Making plant methane formation visible – insights from application of 13C-labelled dimethyl sulfoxide [Research Data]", https://doi.org/10.11588/data/VJFIBD, heiDATA, V1, UNF:6:1Pzn25XuesxTt+Ygdeo4vg== [fileUNF]

Methane (CH4) formation by vegetation has been studied intensively over the last 15 years. However, reported CH4 emissions vary by several orders of magnitude, thus making global estimates difficult. Moreover, the mechanism(s) for CH4 formation by plants is (are) largely unknown....

Methane cycling in a eutrophic lake characterised by multiple stable isotope and flux measurements [data]

Apr 5, 2022

Schroll, Moritz, 2022, "Methane cycling in a eutrophic lake characterised by multiple stable isotope and flux measurements [data]", https://doi.org/10.11588/data/MU3CON, heiDATA, V1, UNF:6:uMXNN9yPRjWKSRIzJA3uuA== [fileUNF]

Recent estimations demonstrate that methane (CH4) emissions from aquatic systems are responsible for up to half of global CH4 emissions. Lakes represent one of the largest CH4 sources, and emissions are predicted to increase due to global warming. However, there is a large uncert...

Effects of temperature and light on methane production of widespread marine Phytoplankton [Dataset]

Aug 20, 2020

Klintzsch, Thomas; Keppler, Frank, 2020, "Effects of temperature and light on methane production of widespread marine Phytoplankton [Dataset]", https://doi.org/10.11588/data/AGKWSG, heiDATA, V1, UNF:6:4gqE/aagNenh7Fz17ii/eg== [fileUNF]

In the present study we investigated the effects of temperature and light intensity (including daylength) on CH4 formation from three widespread marine algal species Emiliania huxleyi, Phaeocystis globosa and Chrysochromulina sp.. Rates of E. huxleyi increased by 210 % when tempe...

The stable carbon isotope signature of methane produced by saprotrophic fungi [Dataset]

Jun 26, 2020

Schroll, Moritz; Keppler, Frank; Greule, Markus; Eckhardt, Christian; Zorn, Holger; Lenhart, Katharina, 2020, "The stable carbon isotope signature of methane produced by saprotrophic fungi [Dataset]", https://doi.org/10.11588/data/DQYPMC, heiDATA, V1, UNF:6:2wuTVqMthe55Z6quzuhvRQ== [fileUNF]

Fungi have recently been identified to produce the greenhouse gas methane. Here, we investigated the stable carbon isotope values of methane produced by saprotrophic fungi. Our results show that stable isotope values of methane by fungi are dependent on the fungal species and the...

Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment [Dataset]

Oct 24, 2019

Klintzsch, Thomas; Keppler, Frank, 2019, "Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment [Dataset]", https://doi.org/10.11588/data/9N1LSR, heiDATA, V1, UNF:6:dxf+QSeRKu9v6uPyAUhX8Q== [fileUNF]

We investigated marine algae as a source of methane (CH4) in oxic surface waters of oceans. The widespread haptophytes Emiliania huxleyi, Phaeocystis globosa and Chrysochromulina sp. were investigated. We performed CH4 production and stable carbon isotope measurements and provide...

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