Relationships Between Land Use and Terrestrial Organic Matter Transfer to the Baltic Sea Over the Last 500 Years
Yang, Bingjie LU ; Ljung, Karl LU
; Ning, Wenxin
LU
; Filipsson, Helena L.
LU
and Nielsen, Anne Birgitte
LU
(2024)
In Journal of Geophysical Research: Biogeosciences
129(1).
- Abstract
Terrestrial organic matter (OM) plays a key role in coastal organic carbon burial. However, few studies focus on the relationship between land use in the watershed and the transport of terrestrial OM to coasts from a long-term perspective. In this study, we compared terrestrial OM deposition between an inlet of the Baltic Sea and an upstream lake within the same watershed over the last 500 years, using lignin biomarkers in the sediments. In combination with pollen-based quantitative land cover reconstruction, we assessed the impacts of semicentennial-scale changes in land use on terrestrial OM export. The results indicated that the concentration, composition, and degradation state of the lignin-derived OM differed substantially between... (More)
Terrestrial organic matter (OM) plays a key role in coastal organic carbon burial. However, few studies focus on the relationship between land use in the watershed and the transport of terrestrial OM to coasts from a long-term perspective. In this study, we compared terrestrial OM deposition between an inlet of the Baltic Sea and an upstream lake within the same watershed over the last 500 years, using lignin biomarkers in the sediments. In combination with pollen-based quantitative land cover reconstruction, we assessed the impacts of semicentennial-scale changes in land use on terrestrial OM export. The results indicated that the concentration, composition, and degradation state of the lignin-derived OM differed substantially between the two sites. The lake received larger amounts of lignin-derived OM during periods of intensified agriculture, but the coastal site did not. The composition of lignin in the coastal sediment did not directly reflect variations in vegetation cover in the watershed. The reason could be that the OM was settled in the upstream basins. Furthermore, the terrestrial OM that did reach the coastal sediments was modified through degradation during the transport, and only the refractory component was deposited at the coast in a relatively unaltered form.
(Less)
- author
- Yang, Bingjie
LU
; Ljung, Karl
LU
; Ning, Wenxin
LU
; Filipsson, Helena L.
LU
and Nielsen, Anne Birgitte
LU
- organization
- publishing date
- 2024-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Baltic Sea, land use, lignin phenols, pollen, terrestrial organic matter
- in
- Journal of Geophysical Research: Biogeosciences
- volume
- 129
- issue
- 1
- article number
- e2023JG007477
- publisher
- Wiley
- external identifiers
-
- scopus:85181658152
- ISSN
- 2169-8953
- DOI
- 10.1029/2023JG007477
- project
- Late Holocene climate change and human impacts in southern Sweden based on lake sediments
- language
- English
- LU publication?
- yes
- additional info
- Funding Information: We would like to thank Conny Lenz and Leo de Jong for their help with fieldwork in Gåsfjärden, the captain and crew of R/V for their help during sampling in Gåsfjärden, Anna Broström, Christine Åkesson, Anupam Ghosh, and Ants Aader for their help with fieldwork in Storsjön. The project was funded by FORMAS Strong Research Environment: Managing Multiple Stressors in the Baltic Sea (217‐2010‐126), the Crafoord Foundation, the Royal Physiographic Society in Lund, and China Scholarship Council (CSC). Publisher Copyright: © 2024. The Authors.
- id
- 6a9632a6-b8c4-400c-8597-02169b41d42a
- date added to LUP
- 2024-01-16 08:37:54
- date last changed
- 2024-01-16 10:23:12
@article{6a9632a6-b8c4-400c-8597-02169b41d42a,
abstract = {{<p>Terrestrial organic matter (OM) plays a key role in coastal organic carbon burial. However, few studies focus on the relationship between land use in the watershed and the transport of terrestrial OM to coasts from a long-term perspective. In this study, we compared terrestrial OM deposition between an inlet of the Baltic Sea and an upstream lake within the same watershed over the last 500 years, using lignin biomarkers in the sediments. In combination with pollen-based quantitative land cover reconstruction, we assessed the impacts of semicentennial-scale changes in land use on terrestrial OM export. The results indicated that the concentration, composition, and degradation state of the lignin-derived OM differed substantially between the two sites. The lake received larger amounts of lignin-derived OM during periods of intensified agriculture, but the coastal site did not. The composition of lignin in the coastal sediment did not directly reflect variations in vegetation cover in the watershed. The reason could be that the OM was settled in the upstream basins. Furthermore, the terrestrial OM that did reach the coastal sediments was modified through degradation during the transport, and only the refractory component was deposited at the coast in a relatively unaltered form.</p>}},
author = {{Yang, Bingjie and Ljung, Karl and Ning, Wenxin and Filipsson, Helena L. and Nielsen, Anne Birgitte}},
issn = {{2169-8953}},
keywords = {{Baltic Sea; land use; lignin phenols; pollen; terrestrial organic matter}},
language = {{eng}},
number = {{1}},
publisher = {{Wiley}},
series = {{Journal of Geophysical Research: Biogeosciences}},
title = {{Relationships Between Land Use and Terrestrial Organic Matter Transfer to the Baltic Sea Over the Last 500 Years}},
url = {{http://dx.doi.org/10.1029/2023JG007477}},
doi = {{10.1029/2023JG007477}},
volume = {{129}},
year = {{2024}},
}