Publications

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Publications Found: 42

Environmental Controls On Ground Cover Species Composition And Productivity In A Boreal Black Spruce Forest
Bisbee, K., Gower, S., Norman, J., Nordheim, E.

Boreal black spruce forests typically have a dense ground cover of bryophytes. The two main bryophyte groups in boreal black spruce forests, feathermoss and Sphagnum, have ecophysiological characteristics that influence …


Journal: Oecologia, Volume 129 (2): 261-270 (2001). DOI: 10.1007/s004420100719 Sites: CA-Obs

Net Primary Production And Carbon Allocation Patterns Of Boreal Forest Ecosystems
Gower, S. T., Krankina, O., Olson, R. J., Apps, M., Linder, S., Wang, C.


Journal: Ecological Applications, Volume 11 (5): 1395-1411 (2001). DOI: 10.2307/3060928 Sites: CA-Man, CA-Obs

Photosynthesis And Light-Use Efficiency By Plants In A Canadian Boreal Forest Ecosystem
Whitehead, D., Gower, S. T.
Measurements of the photosynthetic response to midsummer irradiance were made for 11 species representing the dominant trees, understory shrubs, herbaceous plants and moss species in an old black spruce (Picea mariana (Mill.) B.S.P.) boreal forest ecosystem. Maximum rates of photosynthesis per unit …


Journal: Tree Physiology, Volume 21 (12-13): 925-929 (2001). DOI: 10.1093/treephys/21.12-13.925 Sites: CA-Obs

Similarity Theory For Local And Spatially Averaged Momentum Fluxes
Nakamura, R., Mahrt, L.

Tower and aircraft data from a number of field studies are analyzed to: (1) estimate the roughness lengths for local and area-averaged momentum fluxes over various surface types; (2) examine the applicability of the ψ-stability formulations of Paulson and Dyer for momentum fluxes; (3) investigate the possibility …


Journal: Agricultural And Forest Meteorology, Volume 108 (4): 265-279 (2001). DOI: 10.1016/s0168-1923(01)00250-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp, CA-SJ3

Remote Sensing Of Photosynthetic-Light-Use Efficiency Of Boreal Forest
Nichol, C. J., Huemmrich, K. F., Black, T., Jarvis, P. G., Walthall, C. L., Grace, J., Hall, F. G.

Using a helicopter-mounted portable spectroradiometer and continuous eddy covariance data we were able to evaluate the photochemical reflectance index (PRI) as an indicator of canopy photosynthetic light-use efficiency (LUE) in four boreal forest species during the Boreal …


Journal: Agricultural And Forest Meteorology, Volume 101 (2-3): 131-142 (2000). DOI: 10.1016/s0168-1923(99)00167-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Modeling BRFAnd Radiation Regime Of Boreal And Tropical Forests
Gastellu-Etchegorry, J., Guillevic, P., Zagolski, F., Demarez, V., Trichon, V., Deering, D., Leroy, M.

Monitoring of forest evolution and functioning with remote sensing depends on canopy BRF (bidirectional reflectance factor) sensitivity to biophysical parameters and to canopy PAR (photosynthetically active radiation) regime. Here, we study the canopy BRF of a tropical (Sumatra) …


Journal: Remote Sensing Of Environment, Volume 68 (3): 281-316 (1999). DOI: 10.1016/s0034-4257(98)00119-9 Sites: CA-Oas, CA-Obs, CA-Ojp

Structure Analysis And Classification Of Boreal Forests Using Airborne Hyperspectral BRDF Data From ASAS
Sandmeier, S., Deering, D.

A new approach is presented for deriving vegetation canopy structural characteristics from hyperspectral bidirectional reflectance distribution function (BRDF) data. The methodology is based on the relationship between spectral variability of BRDF effects and canopy geometry. …


Journal: Remote Sensing Of Environment, Volume 69 (3): 281-295 (1999). DOI: 10.1016/s0034-4257(99)00032-2 Sites: CA-Obs, CA-Ojp

The Carbon Balance Of Tropical, Temperate And Boreal Forests
Malhi, Y., Baldocchi, D. D., Jarvis, P. G.

Forest biomes are major reserves for terrestrial carbon, and major components of global primary productivity. The carbon balance of forests is determined by a number of component …


Journal: Plant, Cell And Environment, Volume 22 (6): 715-740 (1999). DOI: 10.1046/j.1365-3040.1999.00453.x Sites: CA-Obs, US-WBW

Characterization Of Radiation Regimes In Nonrandom Forest Canopies: Theory, Measurements, And A Simplified Modeling Approach
Kucharik, C. J., Norman, J. M., Gower, S. T.
We used field measurements and Monte Carlo simulations of canopy gap-size distribution and gap fraction to examine how beam radiation interacts with clumped boreal forest canopies of aspen (Populus tremuloides Michx.), black spruce (Picea mariana (Mill.) B.S.P.) and jack pine (Pinus …


Journal: Tree Physiology, Volume 19 (11): 695-706 (1999). DOI: 10.1093/treephys/19.11.695 Sites: CA-Man, CA-Obs, CA-Ojp

Seasonal Gas Exchange Of Black Spruce Using An Automatic Branch Bag System
Rayment, M. B., Jarvis, P. G.

Four large cuvettes were used to measure whole-branch CO2 and H2O vapour exchange at the Boreal Ecosystem-Atmosphere Study, Southern Study Area, Old Black Spruce site. Measurements started before the spring thaw and continued until after the winter freeze-up. Daytime photosynthesis, nighttime respiration, transpiration …


Journal: Canadian Journal Of Forest Research, Volume 29 (10): 1528-1538 (1999). DOI: 10.1139/cjfr-29-10-1528 Sites: CA-Obs, CA-SF2, CA-SF3