Publications

Publications Found: 1437

Automated Measurements Of CO2 Exchange At The Moss Surface Of A Black Spruce Forest
Goulden, M. L., Crill, P. M.

We used an automated, multiplexing gas-exchange system to measure the net exchange of CO2 at the surfaces of three shady feather moss and three exposed sphagnum moss sites in a black spruce forest during 35 days at the end of the 1995 growing season. Midday gross photosynthesis was 0.5 to 1.0 μmol m−2 s−1


Journal: Tree Physiology, Volume 17 (8-9): 537-542 (1997). DOI: 10.1093/treephys/17.8-9.537 Sites: CA-Obs

Vertical Gradients In Photosynthetic Gas Exchange Characteristics And Refixation Of Respired CO2 Within Boreal Forest Canopies
Brooks, J. R., Flanagan, L. B., Varney, G. T., Ehleringer, J. R.

We compared vertical gradients in leaf gas exchange, CO2 concentrations, and refixation of respired CO2 in stands of Populus tremuloides Michx., Pinus banksiana Lamb. and Picea mariana (Mill.) B.S.P. at the northern and southern boundaries of the central Canadian boreal forest. Midsummer …


Journal: Tree Physiology, Volume 17 (1): 1-12 (1997). DOI: 10.1093/treephys/17.1.1 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Sap Flow In Trembling Aspen: Implications For Stomatal Responses To Vapor Pressure Deficit
Hogg, E. H., Hurdle, P. A.

We monitored sap flow and estimated diurnal changes in transpiration rates of two trembling aspen (Populus tremuloides Michx.) stands, located in the southern boreal forest and aspen parkland of Saskatchewan, Canada. In both stands during the peak growing season (June and July), sap flow during the day (0700–1700 h local …


Journal: Tree Physiology, Volume 17 (8-9): 501-509 (1997). DOI: 10.1093/treephys/17.8-9.501 Sites: CA-Oas

Physiological Responses Of A Black Spruce Forest To Weather
Goulden, M. L., Daube, B. C., Fan, S., Sutton, D. J., Bazzaz, A., Munger, J. W., Wofsy, S. C.

We used eddy covariance to measure the net exchange of CO2 between the atmosphere and a black spruce (Picea mariana) forest in Manitoba for 16,500 hours from March 16, 1994 to October 31, 1996. We then partitioned net exchange into gross photosynthesis and respiration by estimating daytime respiration as a function …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28987-28996 (1997). DOI: 10.1029/97jd01111 Sites: CA-Obs

Root Mass, Net Primary Production And Turnover In Aspen, Jack Pine And Black Spruce Forests In Saskatchewan And Manitoba, Canada
Steele, S. J., Gower, S. T., Vogel, J. G., Norman, J. M.

Root biomass, net primary production and turnover were studied in aspen, jack pine and black spruce forests in two contrasting climates. The climate of the Southern Study Area (SSA) near Prince Albert, Saskatchewan is warmer and drier in the summer and milder in the winter than the Northern Study Area (NSA) near Thompson, Manitoba, …


Journal: Tree Physiology, Volume 17 (8-9): 577-587 (1997). DOI: 10.1093/treephys/17.8-9.577 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Energy Balance And Canopy Conductance Of A Boreal Aspen Forest: Partitioning Overstory And Understory Components
Blanken, P. D., Black, T. A., Yang, P. C., Neumann, H. H., Nesic, Z., Staebler, R., den Hartog, G., Novak, M. D., Lee, X.

The energy balance components were measured throughout most of 1994 in and above a southern boreal aspen (Populus tremuloides Michx.) forest (53.629°N 106.200°W) with a hazelnut (Corylus cornuta Marsh.) understory as part of the Boreal Ecosystem-Atmosphere Study. The turbulent fluxes were measured at both levels …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28915-28927 (1997). DOI: 10.1029/97jd00193 Sites: CA-Oas

Carbon Distribution And Aboveground Net Primary Production In Aspen, Jack Pine, And Black Spruce Stands In Saskatchewan And Manitoba, Canada
Gower, S. T., Vogel, J. G., Norman, J. M., Kucharik, C. J., Steele, S. J., Stow, T. K.

The objectives of this study are to (1) characterize the carbon (C) content, leaf area index, and aboveground net primary production (ANPP) for mature aspen, black spruce, and young and mature jack pine stands …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 29029-29041 (1997). DOI: 10.1029/97jd02317 Sites: CA-Man

Landscape-Scale CO2 , H2O Vapour And Energy Flux Of Moist-Wet Coastal Tundra Ecosystems Over Two Growing Seasons
Vourlitis, G. L., Oechel, W. C.


Journal: The Journal Of Ecology, Volume 85 (5): 575-590 (1997). DOI: 10.2307/2960529 Sites: US-Upa

Intra- And Inter-Specific Variation In Canopy Photosynthesis In A Mixed Deciduous Forest
Bassow, S. L., Bazzaz, F. A.

Within the same forest, photosynthesis can vary greatly among species and within an individual tree. Quantifying the magnitude of variation in leaf-level photosynthesis in a forest canopy will improve our understanding of and ability to model forest carbon cycling. This information requires extensive sampling of photosynthesis in …


Journal: Oecologia, Volume 109 (4): 507-515 (1997). DOI: 10.1007/s004420050111 Sites: US-Ha1

Seasonal Variation Of Carbon Dioxide, Water Vapor, And Energy Exchanges Of A Boreal Black Spruce Forest
Jarvis, P. G., Massheder, J. M., Hale, S. E., Moncrieff, J. B., Rayment, M., Scott, S. L.

Measurements of the fluxes of latent heat λE, sensible heat H, and CO2 were made by eddy covariance in a boreal black spruce forest as part of the Boreal Ecosystem-Atmosphere Study (BOREAS) for 120 days through the growing season in 1994. BOREAS is a multiscale study in which satellite, airborne, stand-scale, …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28953-28966 (1997). DOI: 10.1029/97jd01176 Sites: CA-Obs