Justin E. Campbell

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Converting forest lands into bioenergy agriculture could accelerate climate change by emitting carbon stored in forests, while converting food agriculture lands into bioenergy agriculture could threaten food security. Both problems are potentially avoided by using abandoned agriculture lands for bioenergy agriculture. Here we show the global potential for(More)
Increased production of biomass for energy has the potential to offset substantial use of fossil fuels, but it also has the potential to threaten conservation areas, pollute water resources and decrease food security. The net effect of biomass energy agriculture on climate could be either cooling or warming, depending on the crop, the technology for(More)
Accelerating biofuel production has been promoted as an opportunity to enhance energy security, offset greenhousegas emissions and support rural economies. However, large uncertainties remain in the impacts of biofuels on air quality and climate1,2. Sugar-cane ethanol is one of the most widely used biofuels, and Brazil is its largest producer3. Here we use(More)
Mountaintop coal mining (MCM) in the Southern Appalachian forest region greatly impacts both soil and aquatic ecosystems. Policy and practice currently in place emphasize water quality and soil stability but do not consider upland soil health. Here we report soil organic carbon (SOC) measurements and other soil quality indicators for reclaimed soils in the(More)
Campbell, Jack E. (University of California, Berkeley), and R. L. Dimmick. Effect of 3% hydrogen peroxide on the viability of Serratia marcescens. J. Bacteriol. 91:925-929. 1966.-Populations of Serratia marcescens were exposed to 3% H(2)O(2) at temperatures from 0 to 20 C. The reaction appeared to follow an Arrhenius plot, but variable numbers of diminutive(More)
The singular and interactive effects of ocean acidification and temperature on the physiology of calcified green algae (Halimeda incrassata, H. opuntia, and H. simulans) were investigated in a fully factorial, 4-week mesocosm experiment. Individual aquaria replicated treatment combinations of two pH levels (7.6 and 8.0) and two temperatures (28 and 31 °C).(More)
Agriculture is historically a dominant form of global environmental degradation, and the potential for increased future degradation may be driven by growing demand for food and biofuels. While these impacts have been explored using global gridded maps of croplands, such maps are based on relatively coarse spatial data. Here, we apply high-resolution(More)
Future increases in oceanic carbon dioxide concentrations (CO2(aq)) may provide a benefit to submerged plants by alleviating photosynthetic carbon limitation. However, other environmental factors (for example, nutrient availability) may alter how seagrasses respond to CO2(aq) by regulating the supply of additional resources required to support growth. Thus,(More)
M. Mena-Carrasco, G. R. Carmichael, J. E. Campbell, D. Zimmerman, Y. Tang, B. Adhikary, A. D’allura, L. T. Molina, M. Zavala, A. Garcı́a, F. Flocke, T. Campos, A. J. Weinheimer, R. Shetter, E. Apel, D. D. Montzka, D. J. Knapp, and W. Zheng Universidad Andrés Bello, Department of Environmental Engineering, Santiago, Chile Massachusetts Institute of(More)