Biogeochemistry

Sediment degradation experiments for a low gradient stream suggest the watershed’s connectivity regime exhibits control on stream biogeochemistry
We carried out aerobic incubation experiments to assess oxidation and mineralization-nitrification rates and changes in stable isotopic ratios for sediment and dissolved organic matter and nitrate.
Brenden Riddle, Jimmy Fox, Yi-Tin Wang, Bill Ford, Tyler Mahoney, Erik Pollock, Jason Backus, Nabil Al Aamery
Jan 27, 2023
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Sediment degradation experiments for a low gradient stream suggest the watershed’s connectivity regime exhibits control on stream biogeochemistry
Linking seasonal changes in organic matter composition and nutrients to shifting hydraulic gradients in coastal urban canals
We investigate how time-variable interactions among coastal water source contributions influence the concentrations of dissolved organic carbon (DOC), nutrients, and DOM composition in urban canals..
Matthew A. Smith, J.S. Kominoski, R.M. Price, O.I. Abdul-Aziz, T.G. Troxler
Jan 26, 2023
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Linking seasonal changes in organic matter composition and nutrients to shifting hydraulic gradients in coastal urban canals
River Corridor Sources Dominate CO2 Emissions From a Lowland River Network
We conclude that the narrow river corridor (the stream plus adjacent wetlands) is the source of 87% of the CO2 emitted by streams, and that the uplands that comprise most of the land area are a much smaller source than expected.
Lily Kirk, Matthew J. Cohen
Jan 7, 2023
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River Corridor Sources Dominate CO2 Emissions From a Lowland River Network