Search Results - "Burke, Roger A."

Mountaintop removal coal mining impacts on structural and functional indicators in Central Appalachian streams by Burke, Roger A, Fritz, Ken M, Johnson, Brent R, Price, Rachel

“…Mountaintop removal coal mining (MTR) has been a major source of landscape change in the Central Appalachians of the United States (US). Changes in stream…”
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Earthworms facilitate carbon sequestration through unequal amplification of carbon stabilization compared with mineralization by Zhang, Weixin, Hendrix, Paul F., Dame, Lauren E., Burke, Roger A., Wu, Jianping, Neher, Deborah A., Li, Jianxiong, Shao, Yuanhu, Fu, Shenglei

“…A recent review concluded that earthworm presence increases CO 2 emissions by 33% but does not affect soil organic carbon stocks. However, the findings are…”
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Microbial communities in Cerrado soils under native vegetation subjected to prescribed fire and under pasture by Viana, Laura Tillmann, Bustamante, Mercedes Maria da Cunha, Molina, Marirosa, Pinto, Alexandre de Siqueira, Kisselle, Keith, Zepp, Richard, Burke, Roger A

“…The objective of this work was to evaluate the effects of fire regimes and vegetation cover on the structure and dynamics of soil microbial communities,…”
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Effect of fire on soil-atmosphere exchange of methane and carbon dioxide in Canadian boreal forest sites by Burke, Roger A., Zepp, Richard G., Tarr, Matthew A., Miller, William L., Stocks, Brian J.

“…During the spring and summer of 1994 we monitored soil‐atmosphere exchanges of methane and carbon dioxide at upland sites in the Canadian boreal forest near…”
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Effects of land use on dissolved organic matter biogeochemistry in piedmont headwater streams of the Southeastern United States by Molinero, Jon, Burke, Roger A

“…We measured dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorous (DOP) concentrations over the course of a year…”
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Impacts of Mountaintop Removal and Valley Fill Coal Mining on C and N Processing in Terrestrial Soils and Headwater Streams by Burke, Roger A, Fritz, Ken M, Barton, Chris D, Johnson, Brent R, Fulton, Stephanie, Hardy, Dean, Word, David A, Jack, Jeff D

“…We measured C and N cycling indicators in Appalachian watersheds impacted by mountaintop removal and valley fill (MTR/VF) coal mining, and in nearby forested…”
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Dissolved methane concentration and flux in the coastal zone of the Southern California Bight-Mexican sector: Possible influence of wastewater by Castro-Morales, Karel, Macías-Zamora, J. Vinicio, Canino-Herrera, S. Raúl, Burke, Roger A.

“…We measured dissolved methane concentrations ([CH4]) in the coastal zone of the Southern California Bight-Mexican sector (SCBMex) during two cruises: S1 in the…”
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Chesapeake Bay Blues: Science, Politics, and the Struggle to Save the Bay by Burke, Roger A

“…Burke reviews Chesapeake Bay Blues: Science, Politics, and the Struggle to Save the Bay by Howard R. Ernst…”
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Use of delta(13)C and delta(15)N, and carbon to nitrogen ratios to evaluate the impact of sewage-derived particulate organic matter on the benthic communities of the Southern California Bight by Ramírez-Alvarez, Nancy, Macías-Zamora, José Vinicio, Burke, Roger A, Rodríguez-Villanueva, Lúz Verónica

“…We measured stable isotope ratios (delta(13)C and delta(15)N) of particulate organic matter (POM) sources and benthic organic matter compartments as well as…”
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An assessment of cellulose filters as a standardized material for measuring litter breakdown in headwater streams by Fritz, Ken M., Fulton, Stephanie, Johnson, Brent R., Barton, Chris D., Jack, Jeff D., Word, David A., Burke, Roger A.

“…The decay rate of cellulose filters and associated chemical and biological characteristics were compared with those of white oak (Quercus alba) leaves to…”
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Stable Carbon Isotope Ratio and Composition of Microbial Fatty Acids in Tropical Soils by Burke, Roger A, Molina, Marirosa, Cox, Julia E, Osher, Laurie J, Piccolo, Marisa C

“…The soil microbial community plays a critical part in tropical ecosystem functioning through its role in the soil organic matter (SOM) cycle. This study…”
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Ecological Indicators for the Nation by Burke, Roger A.

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Seasonal soil fluxes of carbon monoxide in burned and unburned Brazilian savannas by Kisselle, Keith W., Zepp, Richard G., Burke, Roger A., de Siqueira Pinto, Alexandre, Bustamante, Mercedes M. C., Opsahl, Stephen, Varella, Renato F., Viana, Laura T.

“…Soil‐atmosphere fluxes of carbon monoxide (CO) were measured from September 1999 through November 2000 in savanna areas in central Brazil (Cerrado) under…”
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Structural and functional characteristics of natural and constructed channels draining a reclaimed mountaintop removal and valley fill coal mine by Fritz, Ken M, Fulton, Stephanie, Johnson, Brent R, Barton, Chris D, Jack, Jeff D, Word, David A, Burke, Roger A

“…Mountaintop removal and valley fill (MTR/VF) coal mining has altered the landscape of the Central Appalachian region in the USA. Among the changes are…”
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Soil-atmosphere fluxes of carbon monoxide during early stages of postfire succession in upland Canadian boreal forests by Zepp, Richard G., Miller, William L., Tarr, Matthew A., Burke, Roger A., Stocks, Brian J.

“…Soil‐atmosphere fluxes of carbon monoxide (CO) were investigated during BOREAS 1994 (June to September 1994) in forest sites near the northern study area (NSA)…”
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Soil-atmosphere exchange of methane in adjacent cultivated and floodplain forest soils by Burke, Roger A., Meyer, Judith L., Cruse, Jennifer M., Birkhead, Karen M., Paul, Michael J.

“…The soil‐atmosphere exchange of methane was measured in adjacent cultivated (corn) and forest (upper floodplain, mixed hardwood) habitats of the southeastern…”
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Using GC–MS/Combustion/IRMS to determine the 13C/ 12C ratios of individual hydrocarbons produced from the combustion of biomass materials—application to biomass burning by O'Malley, Vincent P, Burke, Roger A, Schlotzhauer, William S

“…Simultaneous mass spectral detection and stable carbon isotope analysis was performed on individual indigenous n-alkanes isolated from single C 4 and C 3 plant…”
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Seasonal Variations of D/H and (13)C/(12)C Ratios of Microbial Methane in Surface Sediments by Burke, Roger A, Martens, Christopher S, Sackett, William M

“…A study which found appreciable seasonal and spatial variation in the deltaD and delta13C of gas-phase microbial CH4 produced in the marine sediments of Cape…”
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Use of δ 13 C, δ 15 N, and carbon to nitrogen ratios to evaluate the impact of sewage‐derived particulate organic matter on the benthic communities of the Southern California Bight by Ramírez‐Álvarez, Nancy, Macías‐Zamora, José Vinicio, Burke, Roger A., Rodríguez‐Villanueva, Lúz Verónica

“…Abstract We measured stable isotope ratios (δ 13 Cand δ 15 N) of particulate organic matter (POM) sources and benthic organic matter compartments as well as…”
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USE OF [delta]^sup 13^C, [delta]^sup 15^N, AND CARBON TO NITROGEN RATIOS TO EVALUATE THE IMPACT OF SEWAGE-DERIVED PARTICULATE ORGANIC MATTER ON THE BENTHIC COMMUNITIES OF THE SOUTHERN CALIFORNIA BIGHT by Ramírez-Álvarez, Nancy, Macías-Zamora, José Vinicio, Burke, Roger A, Rodríguez-Villanueva, Lúz Verónica

“…We measured stable isotope ratios (δ^sup 13^C and δ^sup 15^N) of paniculate organic matter (POM) sources and benthic organic matter compartments as well as…”
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