scholarly journals Characterization of Low-Molecular-Weight Organic Acids and Organic Carbon of Taiwan Red Cypress, Peacock Pine, and Moso Bamboo in a Temperate Rain Forest

2007 ◽  
Vol 38 (1) ◽  
pp. 77-91 ◽  
Author(s):  
Ya Nan Wang ◽  
Ming Kuang Wang ◽  
Shun Yao Zhuang ◽  
Ta Chi Tu ◽  
Kai Yin Chiang
Keyword(s):  
Molecular Weight ◽  
Organic Carbon ◽  
Organic Acids ◽  
Rain Forest ◽  
Moso Bamboo ◽  
Low Molecular Weight ◽  
Temperate Rain Forest

scholarly journals Ancient low–molecular-weight organic acids in permafrost fuel rapid carbon dioxide production upon thaw

2015 ◽  
Vol 112 (45) ◽  
pp. 13946-13951 ◽  
Author(s):  
Travis W. Drake ◽  
Kimberly P. Wickland ◽  
Robert G. M. Spencer ◽  
Diane M. McKnight ◽  
Robert G. Striegl
Keyword(s):  
Carbon Dioxide ◽  
Molecular Weight ◽  
Organic Carbon ◽  
Organic Acids ◽  
Dissolved Inorganic Carbon ◽  
Carbon Dioxide Production ◽  
High Temporal Resolution ◽  
Low Molecular Weight ◽  
Doc Concentration ◽  
Permafrost Soils

Northern permafrost soils store a vast reservoir of carbon, nearly twice that of the present atmosphere. Current and projected climate warming threatens widespread thaw of these frozen, organic carbon (OC)-rich soils. Upon thaw, mobilized permafrost OC in dissolved and particulate forms can enter streams and rivers, which are important processors of OC and conduits for carbon dioxide (CO2) to the atmosphere. Here, we demonstrate that ancient dissolved organic carbon (DOC) leached from 35,800 y B.P. permafrost soils is rapidly mineralized to CO2. During 200-h experiments in a novel high–temporal-resolution bioreactor, DOC concentration decreased by an average of 53%, fueling a more than sevenfold increase in dissolved inorganic carbon (DIC) concentration. Eighty-seven percent of the DOC loss to microbial uptake was derived from the low–molecular-weight (LMW) organic acids acetate and butyrate. To our knowledge, our study is the first to directly quantify high CO2production rates from permafrost-derived LMW DOC mineralization. The observed DOC loss rates are among the highest reported for permafrost carbon and demonstrate the potential importance of LMW DOC in driving the rapid metabolism of Pleistocene-age permafrost carbon upon thaw and the outgassing of CO2to the atmosphere by soils and nearby inland waters.

Production of dissolved organic carbon and low-molecular weight organic acids in soil solution driven by recent tree photosynthate

2007 ◽  
Vol 84 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Reiner Giesler ◽  
Mona N. Högberg ◽  
Bjarne W. Strobel ◽  
Andreas Richter ◽  
Anders Nordgren ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Organic Acids ◽  
Soil Solution ◽  
Low Molecular Weight

Characterization of Low Molecular Weight Organic Acids from Beech Wood Treated in Supercritical Water

2005 ◽  
Vol 123 (1-3) ◽  
pp. 0795-0806 ◽  
Author(s):  
Kei Yoshida ◽  
Junko Kusaki ◽  
Katsunobu Ehara ◽  
Shiro Saka
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Supercritical Water ◽  
Beech Wood ◽  
Low Molecular Weight

scholarly journals Characterization of low-molecular-weight organic acids isolated from the Toarcian argillite pore water (Tournemire site, France)

2015 ◽  
Vol 347 (2) ◽  
pp. 77-83 ◽  
Author(s):  
Camille Chautard ◽  
Aurélie Ritt ◽  
Laurent De Windt ◽  
Marie Libert ◽  
Denise Stammose
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Pore Water ◽  
Low Molecular Weight
Sign in / Sign up

Export Citation Format

Share Document