Results 1 to 10 of about 75,089 (261)

Enhanced rates of particulate organic matter remineralization by microzooplankton are diminished by added ballast minerals [PDF]

Biogeosciences, 2013
To examine the potentially competing influences of microzooplankton and calcite mineral ballast on organic matter remineralization, we incubated diatoms in darkness in rolling tanks with and without added calcite minerals (coccoliths) and ...
F. A. C. Le Moigne, M. Gallinari, E. Laurenceau, C. L. De La Rocha   +3 more
doaj   +1 more source

The unique biogeochemical role of carbonate-associated organic matter in a subtropical seagrass meadow

Communications Earth & Environment
The particulate organic matter buried in carbonate-rich seagrass ecosystems is an important blue carbon reservoir. While carbonate sediments are affected by alkalinity produced or consumed in seagrass-mediated biogeochemical processes, little is known ...
Mary A. Zeller, Bryce R. Van Dam, Christian Lopes, Amy M. McKenna, Christopher L. Osburn, James W. Fourqurean, John S. Kominoski, Michael Ernst Böttcher   +7 more
doaj   +1 more source

Identifying Drivers of Seasonality in Lena River Biogeochemistry and Dissolved Organic Matter Fluxes

Frontiers in Environmental Science, 2020
Warming air temperatures, shifting hydrological regimes and accelerating permafrost thaw in the catchments of the Arctic rivers is affecting their biogeochemistry.
Bennet Juhls, Colin A. Stedmon, Anne Morgenstern, Hanno Meyer, Jens Hölemann, Birgit Heim, Vasily Povazhnyi, Pier P. Overduin   +7 more
doaj   +1 more source

Halogenated Organic Compounds: A Massive Halogen Reservoir and an Intriguing Component of the Marine Dissolved Organic Matter Pool

Geophysical Research Letters
Biogeochemical reactions produce volatile halocarbons and semi‐ to nonvolatile dissolved organic halogens (DOX) in marine systems. The former has a large influence on atmospheric chemistry, but little is known about DOX.
Leanne C. Powers, Johan Schijf, Philippe Schmitt‐Kopplin, Michael Gonsior   +3 more
doaj   +1 more source

The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air–sea exchange processes [PDF]

Biogeosciences, 2016
The sea-surface microlayer (SML) is at the uppermost surface of the ocean, linking the hydrosphere with the atmosphere. The presence and enrichment of organic compounds in the SML have been suggested to influence air–sea gas exchange processes as well as
A. Engel, L. Galgani
doaj   +1 more source

Dissolved Organic Matter Enhances Transport of PAHs to Aquatic Organisms [PDF]

Environmental Science & Technology, 2009
In this study, the uptake of pyrene and benzo[b]fluoranthene by an aquatic worm (Lumbriculus variegatus) and a poly(dimethylsiloxane) coated glass fiber was studied at different humic acid concentrations. The accumulation of pyrene was not affected by the presence of the humic matrix.
ter Laak, T.L., ter Bekke, M.A., Hermens, J.L.M.   +2 more
openaire   +4 more sources

Temperature Dependence of Photodegradation of Dissolved Organic Matter to Dissolved Inorganic Carbon and Particulate Organic Carbon. [PDF]

PLoS ONE, 2015
Photochemical transformation of dissolved organic matter (DOM) has been studied for more than two decades. Usually, laboratory or "in-situ" experiments are used to determine photodegradation variables.
Petr Porcal, Peter J Dillon, Lewis A Molot   +2 more
doaj   +1 more source

Seasonal dynamics of dissolved organic matter in a small tropical estuary-coastal bay continuum: distribution, transformation, flux, and global perspectives

Frontiers in Marine Science
The export and transformation of riverine dissolved organic matter (DOM) at the river-sea interface are critical to understanding carbon budgets in tropical regions, yet remain underexplored in small watersheds.
Pengfei Liu, Kuan Jiang, Qi Tan, Fajin Chen, Renming Jia, Chao Wang, Chao Wang, Chao Wang, Chao Wang   +8 more
doaj   +1 more source

Dissolved Organic Carbon Turnover in Permafrost-Influenced Watersheds of Interior Alaska: Molecular Insights and the Priming Effect

Frontiers in Earth Science, 2019
Increased permafrost thaw due to climate change in northern high-latitudes has prompted concern over impacts on soil and stream biogeochemistry that affect the fate of dissolved organic carbon (DOC).
Sadie R. Textor, Kimberly P. Wickland, David C. Podgorski, Sarah Ellen Johnston, Robert G. M. Spencer   +4 more
doaj   +1 more source

Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada

Environmental Research Letters, 2014
Catchment export of terrestrial dissolved organic matter (DOM) and its downstream degradation in aquatic ecosystems are important components of landscape scale carbon balances.
D Olefeldt, A Persson, M R Turetsky
doaj   +1 more source