Seasonal variability and sources of in situ brGDGT production in a permanently stratified African crater lake

van Bree, Loes G. J.; Peterse, Francien; Baxter, Allix J.; De Crop, Wannes; van Grinsven, Sigrid; Villanueva, Laura; Verschuren, Dirk; Sinninghe Damsté, Jaap S.

doi:https://doi.org/10.5194/bg-17-5443-2020

Articles | Volume 17, issue 21

Biogeosciences, 17, 5443–5463, 2020

https://doi.org/10.5194/bg-17-5443-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Biogeosciences, 17, 5443–5463, 2020

https://doi.org/10.5194/bg-17-5443-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 21

Research article 13 Nov 2020

Research article | 13 Nov 2020

Seasonal variability and sources of in situ brGDGT production in a permanently stratified African crater lake

Loes G. J. van Bree et al.

Data sets

Concentration of branched glycerol dialkyl glycerol tetraethers in suspended particulate matter of Lake Chala from September 2013–January 2015 Francien Peterse, Loes G. J. van Bree, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté https://doi.org/10.1594/PANGAEA.922776

Concentration of branched glycerol dialkyl glycerol tetraethers in settling particles of Lake Chala from September 2010–January 2015 Francien Peterse, Loes G. J. van Bree, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté https://doi.org/10.1594/PANGAEA.922780

Concentration of branched glycerol dialkyl glycerol tetraethers in catchment soils of Lake Chala Francien Peterse, Loes G. J. van Bree, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté https://doi.org/10.1594/PANGAEA.922781

Concentration of branched glycerol dialkyl glycerol tetraethers in surficial sediments of Lake Chala Francien Peterse, Loes G. J. van Bree, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté https://doi.org/10.1594/PANGAEA.922783

Bacterial community composition in suspended particulate matter of Lake Chala from September 2013–January 2015 Francien Peterse, Loes G. J. van Bree, Allix J. Baxter, Wannes De Crop, Sigrid van Grinsven, Laura Villanueva, Dirk Verschuren, and Jaap S. Sinninghe Damsté https://doi.org/10.1594/PANGAEA.924859

Short summary

Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are used as a paleothermometer based on their temperature dependence in global soils, but aquatic production complicates their use in lakes. BrGDGTs in the water column of Lake Chala, East Africa, respond to oxygen conditions and mixing. Changes in their signal can be linked to bacterial community composition rather than membrane adaptation to changing conditions. Their integrated signal in the sediment reflects mean air temperature.