@article{8a4edf6250f54f57af3c91ada81bd6bb,
title = "Impact of Holocene climate change on silicon cycling in Lake 850, Northern Sweden",
abstract = "Diatom-rich sediment in a small subarctic lake (Lake 850) was investigated in a 9400 cal. yr BP sediment record in order to explore the impact of Holocene climate evolution on silicon cycling. Diatom stable silicon isotopes ((Formula presented.)) and biogenic silica (BSi) indicate that high BSi concentrations in sediment throughout the Holocene are associated with a lighter Si isotope source of dissolved silica (DSi), such as groundwater or freshly weathered primary minerals. Furthermore, higher BSi concentrations were favoured during the mid-Holocene by low detrital inputs and possibly a longer ice-free period allowing for more diatom production to occur. The diatom (Formula presented.) signature shows a link to changes in regional climate and is influenced by length of diatom growth period and hydrological fluctuations. Lighter Si isotopic values occur during the mid-Holocene, when climate is inferred to be more continental and drier, with pronounced seasonality. In contrast, a heavier Si isotopic signature is observed in the early and late Holocene, when oceanic influences are thought to be stronger and the climate wetter. The (Formula presented.) values have generally lighter signatures as compared with other studies, which supports a light DSi source.",
keywords = "Holocene, diatom, isotope, lake, sediment, silicon",
author = "Petra Zahajsk{\'a} and Rosine Cartier and Fritz, {Sherilyn C.} and Johanna Stadmark and Sophie Opfergelt and Ruth Yam and Aldo Shemesh and Conley, {Daniel J.}",
note = "Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by The Royal Physiographic Society in Lund and by the Center for Geosphere Dynamics (UNCE/SCI/006) to PZ, the Swedish Research Council to DJC, the Swedish Research Council Tage Erlander Professorship to SCF, and the “Fonds National de la Recherche Scientifique” (FNRS, Belgium, FC69480) to SO. Funding Information: We thank the organizations and the individuals who helped with the fieldwork and/or provided us with equipment and/or advice: Thomas Westin, Keith W. Larson, Erik Lundin, Svante Zachrisson, CIRC, Christian Bigler, Lena Rubensdotter, Gunhild Rosqvist, field assistants Carla Nantke and Ethan Silvester. We thank Mats Rundgren for help with 14C samples evaluation and species identification. We acknowledge Hans Sch?berg and Melanie Kielman for assistance during sample preparation and isotope data acquisition. This is Vegacenter contribution number # 043. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by The Royal Physiographic Society in Lund and by the Center for Geosphere Dynamics (UNCE/SCI/006) to PZ, the Swedish Research Council to DJC, the Swedish Research Council Tage Erlander Professorship to SCF, and the ?Fonds National de la Recherche Scientifique? (FNRS, Belgium, FC69480) to SO. Publisher Copyright: {\textcopyright} The Author(s) 2021.",
year = "2021",
month = oct,
doi = "10.1177/09596836211025973",
language = "English (US)",
volume = "31",
pages = "1582--1592",
journal = "Holocene",
issn = "0959-6836",
publisher = "SAGE Publications Ltd",
number = "10",
}