scholarly journals Land Use, Land Use History, and Soil Type Affect Soil Greenhouse Gas Fluxes From Agricultural Landscapes of the East African Highlands

2018 ◽  
Vol 123 (3) ◽  
pp. 976-990 ◽  
Author(s):  
I. Wanyama ◽  
M. C. Rufino ◽  
D. E. Pelster ◽  
G. Wanyama ◽  
C. Atzberger ◽  
...  
Keyword(s):  
Land Use ◽  
Greenhouse Gas ◽  
Soil Type ◽  
Agricultural Landscapes ◽  
Land Use History ◽  
East African ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes ◽  
African Highlands ◽  
East African Highlands

scholarly journals Changes in soil greenhouse gas fluxes by land use change from primary forest

2020 ◽  
Vol 26 (4) ◽  
pp. 2656-2667 ◽  
Author(s):  
Mengguang Han ◽  
Biao Zhu
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Greenhouse Gas ◽  
Primary Forest ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

scholarly journals Land use change and the impact on greenhouse gas exchange in north Australian savanna soils

2011 ◽  
Vol 8 (5) ◽  
pp. 9087-9123 ◽  
Author(s):  
S. P. P. Grover ◽  
S. J. Livesley ◽  
L. B. Hutley ◽  
H. Jamali ◽  
B. Fest ◽  
...  
Keyword(s):  
Land Use ◽  
Nitrous Oxide ◽  
Land Use Change ◽  
Greenhouse Gas ◽  
Water Content ◽  
Soil Water Content ◽  
Co2 Fluxes ◽  
Soil Co2 ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

Abstract. Savanna ecosystems are subject to accelerating land use change as human demand for food and forest products increases. Land use change has been shown to both increase and decrease greenhouse gas fluxes from savannas and considerable uncertainty exists about the non-CO2 fluxes from the soil. We measured methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) over a complete wet-dry seasonal cycle at three replicated sites of each of three land uses: savanna, young pasture and old pasture (converted from savanna 5–7 and 25–30 yr ago, respectively) in the Douglas Daly region of northern Australia. The effect of break of season rains at the end of the dry season was investigated with two irrigation experiments. Land use change from savanna to pasture increased net greenhouse gas fluxes from the soil. Pasture sites were a weaker sink for CH4 than savanna sites and, under wet conditions, old pastures turned from being sinks to a significant source of CH4. Nitrous oxide emissions were generally very low, in the range of 0 to 5 μg N2O-N m−2 h−1, and under dry conditions soil uptake of N2O was apparent. Break of season rains produced a small, short lived pulse of N2O up to 20 μg N2O-N m−2 h−1, most evident in pasture soil. Annual cumulative soil CO2 fluxes increased after clearing, with savanna (14.6 t CO2-C ha−1 yr−1) having the lowest fluxes compared to old pasture (18.5 t CO2-C ha−1 yr−1) and young pasture (20.0 t CO2-C ha−1 yr−1). Clearing savanna increased soil-based greenhouse gas emissions from 53 to ~70 t CO2-equivalents, a 30% increase dominated by an increase in soil CO2 emissions and shift from soil CH4 sink to source. Seasonal variation was clearly driven by soil water content, supporting the emerging view that soil water content is a more important driver of soil gas fluxes than soil temperature in tropical ecosystems where temperature varies little among seasons.

scholarly journals Greenhouse gas fluxes of typical northern subtropical forest soils: Impacts of land use change and reduced precipitation

2016 ◽  
Vol 40 (10) ◽  
pp. 1049-1063 ◽  
Author(s):  
JU Hua ◽  
◽  
SHEN Guo-Zhen ◽  
MA Ming-Zhe ◽  
GE Jie-Lin ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Greenhouse Gas ◽  
Forest Soils ◽  
Subtropical Forest ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

scholarly journals Land use change and the impact on greenhouse gas exchange in north Australian savanna soils

2012 ◽  
Vol 9 (1) ◽  
pp. 423-437 ◽  
Author(s):  
S. P. P. Grover ◽  
S. J. Livesley ◽  
L. B. Hutley ◽  
H. Jamali ◽  
B. Fest ◽  
...  
Keyword(s):  
Land Use ◽  
Nitrous Oxide ◽  
Land Use Change ◽  
Greenhouse Gas ◽  
Water Content ◽  
Soil Water Content ◽  
Co2 Fluxes ◽  
Soil Co2 ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

Abstract. Savanna ecosystems are subjected to accelerating land use change as human demand for food and forest products increases. Land use change has been shown to both increase and decrease greenhouse gas fluxes from savannas and considerable uncertainty exists about the non-CO2 fluxes from the soil. We measured methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2) over a complete wet-dry seasonal cycle at three replicate sites of each of three land uses: savanna, young pasture and old pasture (converted from savanna 5–7 and 25–30 yr ago, respectively) in the Douglas Daly region of Northern Australia. The effect of break of season rains at the end of the dry season was investigated with two irrigation experiments. Land use change from savanna to pasture increased net greenhouse gas fluxes from the soil. Pasture sites were a weaker sink for CH4 than savanna sites and, under wet conditions, old pastures turned from being sinks to a significant source of CH4. Nitrous oxide emissions were generally very low, in the range of 0 to 5 μg N2O-N m−2 h−1, and under dry conditions soil uptake of N2O was apparent. Break of season rains produced a small, short lived pulse of N2O up to 20 μg N2O-N m−2 h−1, most evident in pasture soil. Annual cumulative soil CO2 fluxes increased after clearing, with savanna (14.6 t CO2-C ha−1 yr−1) having the lowest fluxes compared to old pasture (18.5 t CO2-C ha−1 yr−1) and young pasture (20.0 t CO2-C ha−1 yr−1). Clearing savanna increased soil-based greenhouse gas emissions from 53 to ∼ 70 t CO2-equivalents, a 30% increase dominated by an increase in soil CO2 emissions and shift from soil CH4 sink to source. Seasonal variation was clearly driven by soil water content, supporting the emerging view that soil water content is a more important driver of soil gas fluxes than soil temperature in tropical ecosystems where temperature varies little among seasons.

scholarly journals The abundance of nitrogen cycle genes and potential greenhouse gas fluxes depends on land use type and little on soil aggregate size

2018 ◽  
Vol 125 ◽  
pp. 1-11 ◽  
Author(s):  
Aimeric Blaud ◽  
Bas van der Zaan ◽  
Manoj Menon ◽  
Georg J. Lair ◽  
Dayi Zhang ◽  
...  
Keyword(s):  
Land Use ◽  
Greenhouse Gas ◽  
Nitrogen Cycle ◽  
Aggregate Size ◽  
Soil Aggregate ◽  
Land Use Type ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

scholarly journals Carbon and nitrogen contents and greenhouse gas fluxes of the Eurasian steppe soils with different land-use histories located in the Arkaim museum reserve of South Ural, Russia

2012 ◽  
Vol 58 (2) ◽  
pp. 238-244 ◽  
Author(s):  
Hirohiko Nagano ◽  
Soh Sugihara ◽  
Miwa Matsushima ◽  
Susumu Okitsu ◽  
Valentina E. Prikhodko ◽  
...  
Keyword(s):  
Land Use ◽  
Greenhouse Gas ◽  
Carbon And Nitrogen ◽  
Eurasian Steppe ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes ◽  
Nitrogen Contents
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