Controls on Terrestrial Carbon Fluxes in Simulated Networks of Connected Streams and Lakes. Vachon, D., Sponseller, R. A., Rosvall, M., & Karlsson, J. Global Biogeochemical Cycles, 37(3):e2022GB007597, 2023. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022GB007597![Controls on Terrestrial Carbon Fluxes in Simulated Networks of Connected Streams and Lakes [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Inland waters play a critical role in the carbon cycle by emitting significant amounts of land-exported carbon to the atmosphere. While carbon gas emissions from individual aquatic systems have been extensively studied, how networks of connected streams and lakes regulate integrated fluxes of organic and inorganic forms remain poorly understood. Here, we develop a process-based model to simulate the fate of terrestrial dissolved organic carbon (DOC) and carbon dioxide (CO2) in artificial inland water networks with variable topology, hydrology, and DOC reactivity. While the role of lakes is highly dependent on DOC reactivity, we find that the mineralization of terrestrial DOC is more efficient in lake-rich networks. Regardless of typology and hydrology, terrestrial CO2 is emitted almost entirely within the network boundary. Consequently, the proportion of exported terrestrial carbon emitted from inland water networks increases with the CO2 versus DOC export ratio. Overall, our results suggest that CO2 emissions from inland waters are governed by interactions between the relative amount and reactivity of terrestrial DOC and CO2 inputs and the network configuration of recipient lakes and streams.
@article{vachon_controls_2023,
title = {Controls on {Terrestrial} {Carbon} {Fluxes} in {Simulated} {Networks} of {Connected} {Streams} and {Lakes}},
volume = {37},
copyright = {© 2023. The Authors.},
issn = {1944-9224},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2022GB007597},
doi = {10.1029/2022GB007597},
abstract = {Inland waters play a critical role in the carbon cycle by emitting significant amounts of land-exported carbon to the atmosphere. While carbon gas emissions from individual aquatic systems have been extensively studied, how networks of connected streams and lakes regulate integrated fluxes of organic and inorganic forms remain poorly understood. Here, we develop a process-based model to simulate the fate of terrestrial dissolved organic carbon (DOC) and carbon dioxide (CO2) in artificial inland water networks with variable topology, hydrology, and DOC reactivity. While the role of lakes is highly dependent on DOC reactivity, we find that the mineralization of terrestrial DOC is more efficient in lake-rich networks. Regardless of typology and hydrology, terrestrial CO2 is emitted almost entirely within the network boundary. Consequently, the proportion of exported terrestrial carbon emitted from inland water networks increases with the CO2 versus DOC export ratio. Overall, our results suggest that CO2 emissions from inland waters are governed by interactions between the relative amount and reactivity of terrestrial DOC and CO2 inputs and the network configuration of recipient lakes and streams.},
language = {en},
number = {3},
urldate = {2023-07-20},
journal = {Global Biogeochemical Cycles},
author = {Vachon, Dominic and Sponseller, Ryan A. and Rosvall, Martin and Karlsson, Jan},
year = {2023},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022GB007597},
keywords = {\#nosource, CO2 emission, DOC mineralization, aquatic network, carbon cycle, modeling},
pages = {e2022GB007597},
}
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Here, we develop a process-based model to simulate the fate of terrestrial dissolved organic carbon (DOC) and carbon dioxide (CO2) in artificial inland water networks with variable topology, hydrology, and DOC reactivity. While the role of lakes is highly dependent on DOC reactivity, we find that the mineralization of terrestrial DOC is more efficient in lake-rich networks. Regardless of typology and hydrology, terrestrial CO2 is emitted almost entirely within the network boundary. Consequently, the proportion of exported terrestrial carbon emitted from inland water networks increases with the CO2 versus DOC export ratio. 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