scholarly journals The role of photochemical degradation of dissolved organic carbon in regulating the UV transparency of three lakes on the Pocono Plateau

1997 ◽  
Vol 42 (2) ◽  
pp. 239-249 ◽  
Author(s):  
Donald P. Morris ◽  
Bruce R. Hargreaves
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Photochemical Degradation

The Role of Allochthonous Inputs of Dissolved Organic Carbon on the Hypolimnetic Oxygen Content of Reservoirs

Ecosystems ◽  
2008 ◽  
Vol 11 (7) ◽  
pp. 1035-1053 ◽  
Author(s):  
Rafael Marcé ◽  
Enrique Moreno-Ostos ◽  
Pilar López ◽  
Joan Armengol
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Oxygen Content ◽  
Allochthonous Inputs ◽  
Hypolimnetic Oxygen

Stability and aggregation of silver and titanium dioxide nanoparticles in seawater: Role of salinity and dissolved organic carbon

2014 ◽  
Vol 33 (5) ◽  
pp. 1023-1029 ◽  
Author(s):  
Huanhua Wang ◽  
Robert M. Burgess ◽  
Mark G. Cantwell ◽  
Lisa M. Portis ◽  
Monique M. Perron ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Titanium Dioxide Nanoparticles

scholarly journals The role of watershed characteristics, permafrost thaw, and wildfire on dissolved organic carbon biodegradability and water chemistry in Arctic headwater streams

2015 ◽  
Vol 12 (5) ◽  
pp. 4021-4056 ◽  
Author(s):  
J. R. Larouche ◽  
B. W. Abbott ◽  
W. B. Bowden ◽  
J. B. Jones
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Aquatic Ecosystems ◽  
Vegetation Type ◽  
Watershed Scale ◽  
Ecosystem Recovery ◽  
Watershed Characteristics ◽  
Stream Geomorphology ◽  
Tundra Ecosystems

Abstract. In the Alaskan Arctic, rapid climate change is increasing the frequency of disturbance including wildfire and permafrost collapse. These pulse disturbances may influence the delivery of dissolved organic carbon (DOC) to aquatic ecosystems, however the magnitude of these effects compared to the natural background variability of DOC at the watershed scale is not well known. We measured DOC quantity, composition, and biodegradability from 14 river and stream reaches (watershed sizes ranging from 1.5–167 km2) some of which were impacted by permafrost collapse (thermokarst) and fire. We found that region had a significant impact on quantity and biodegradability of DOC, likely driven by landscape and watershed characteristics such as lithology, soil and vegetation type, elevation, and glacial age. However, contrary to our hypothesis, we found that streams disturbed by thermokarst and fire did not contain significantly altered labile DOC fractions compared to adjacent reference waters, potentially due to rapid ecosystem recovery after fire and thermokarst as well as the limited spatial extent of thermokarst. Overall, biodegradable DOC ranged from 4 to 46% and contrary to patterns of DOC biodegradability in large Arctic rivers, seasonal variation in DOC biodegradability showed no clear pattern between sites, potentially related to stream geomorphology and position along the river network. While thermokarst and fire can alter DOC quantity and biodegradability at the scale of the feature, we conclude that tundra ecosystems are resilient to these types of disturbance.

scholarly journals Factors affecting MeHg bioaccumulation in stream biota: the role of dissolved organic carbon and diet

Ecotoxicology ◽  
2019 ◽  
Vol 28 (8) ◽  
pp. 949-963 ◽  
Author(s):  
Hannah J. Broadley ◽  
Kathryn L. Cottingham ◽  
Nicholas A. Baer ◽  
Kathleen C. Weathers ◽  
Holly A. Ewing ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Factors Affecting ◽  
Stream Biota
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