Influence of pO2on Iron Redox Cycling and Anaerobic Organic Carbon Mineralization in a Humid Tropical Forest Soil

2018 ◽  
Vol 52 (14) ◽  
pp. 7709-7719 ◽  
Author(s):  
Chunmei Chen ◽  
Christof Meile ◽  
Jared Wilmoth ◽  
Diego Barcellos ◽  
Aaron Thompson
Keyword(s):  
Organic Carbon ◽  
Tropical Forest ◽  
Forest Soil ◽  
Carbon Mineralization ◽  
Redox Cycling ◽  
Tropical Forest Soil ◽  
Organic Carbon Mineralization ◽  
Humid Tropical Forest ◽  
Iron Redox

scholarly journals Drivers and patterns of iron redox cycling from surface to bedrock in a deep tropical forest soil: a new conceptual model

2016 ◽  
Vol 130 (1-2) ◽  
pp. 177-190 ◽  
Author(s):  
Steven J. Hall ◽  
Daniel Liptzin ◽  
Heather L. Buss ◽  
Kristen DeAngelis ◽  
Whendee L. Silver
Keyword(s):  
Tropical Forest ◽  
Forest Soil ◽  
Conceptual Model ◽  
Redox Cycling ◽  
Tropical Forest Soil ◽  
Iron Redox

scholarly journals Phosphorus Fractionation Responds to Dynamic Redox Conditions in a Humid Tropical Forest Soil

2018 ◽  
Vol 123 (9) ◽  
pp. 3016-3027 ◽  
Author(s):  
Yang Lin ◽  
Amrita Bhattacharyya ◽  
Ashley N. Campbell ◽  
Peter S. Nico ◽  
Jennifer Pett-Ridge ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Forest Soil ◽  
Phosphorus Fractionation ◽  
Redox Conditions ◽  
Tropical Forest Soil ◽  
Humid Tropical Forest

Redox Fluctuations Frame Microbial Community Impacts on N-cycling Rates in a Humid Tropical Forest Soil

2006 ◽  
Vol 81 (1) ◽  
pp. 95-110 ◽  
Author(s):  
Jennifer Pett-Ridge ◽  
Whendee L. Silver ◽  
Mary K. Firestone
Keyword(s):  
Microbial Community ◽  
Tropical Forest ◽  
Forest Soil ◽  
N Cycling ◽  
Tropical Forest Soil ◽  
Community Impacts ◽  
Humid Tropical Forest

scholarly journals Long-Term Nitrogen Addition Decreases Soil Carbon Mineralization in an N-Rich Primary Tropical Forest

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 734
Author(s):  
Xiankai Lu ◽  
Qinggong Mao ◽  
Zhuohang Wang ◽  
Taiki Mori ◽  
Jiangming Mo ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Tropical Forest ◽  
Soil Carbon ◽  
Tropical Forests ◽  
Carbon Mineralization ◽  
N Deposition ◽  
Soil Carbon Mineralization ◽  
N Additions

Anthropogenic elevated nitrogen (N) deposition has an accelerated terrestrial N cycle, shaping soil carbon dynamics and storage through altering soil organic carbon mineralization processes. However, it remains unclear how long-term high N deposition affects soil carbon mineralization in tropical forests. To address this question, we established a long-term N deposition experiment in an N-rich lowland tropical forest of Southern China with N additions such as NH4NO3 of 0 (Control), 50 (Low-N), 100 (Medium-N) and 150 (High-N) kg N ha−1 yr−1, and laboratory incubation experiment, used to explore the response of soil carbon mineralization to the N additions therein. The results showed that 15 years of N additions significantly decreased soil carbon mineralization rates. During the incubation period from the 14th day to 56th day, the average decreases in soil CO2 emission rates were 18%, 33% and 47% in the low-N, medium-N and high-N treatments, respectively, compared with the Control. These negative effects were primarily aroused by the reduced soil microbial biomass and modified microbial functions (e.g., a decrease in bacteria relative abundance), which could be attributed to N-addition-induced soil acidification and potential phosphorus limitation in this forest. We further found that N additions greatly increased soil-dissolved organic carbon (DOC), and there were significantly negative relationships between microbial biomass and soil DOC, indicating that microbial consumption on soil-soluble carbon pool may decrease. These results suggests that long-term N deposition can increase soil carbon stability and benefit carbon sequestration through decreased carbon mineralization in N-rich tropical forests. This study can help us understand how microbes control soil carbon cycling and carbon sink in the tropics under both elevated N deposition and carbon dioxide in the future.

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