Publications

Publications Found: 1437

Simulating Forest Productivity And Surface-Atmosphere Carbon Exchange In The BOREAS Study Region
Kimball, J. S., Thornton, P. E., White, M. A., Running, S. W.

A process-based, general ecosystem model (BIOME–BGC) was used to simulate daily gross primary production, maintenance and heterotrophic respiration, net primary production and net ecosystem carbon exchange of boreal aspen, jack pine and black spruce stands. Model simulations of daily net carbon exchange of the ecosystem (NEE) explained …


Journal: Tree Physiology, Volume 17 (8-9): 589-599 (1997). DOI: 10.1093/treephys/17.8-9.589 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Leaf δ13C In Pinus Resinosa Trees And Understory Plants: Variation Associated With Light And CO2 Gradients
Berry, S. C., Varney, G. T., Flanagan, L. B.

 Our objective was to evaluate the relative importance of gradients in light intensity and the isotopic composition of atmospheric CO2 for variation in leaf carbon isotope ratios within a Pinus resinosa forest. …


Journal: Oecologia, Volume 109 (4): 499-506 (1997). DOI: 10.1007/s004420050110 Sites: CA-Mer

Regulation Of Branch-Level Gas Exchange Of Boreal Trees: Roles Of Shoot Water Potential And Vapor Pressure Difference
Dang, Q., Margolis, H. A., Coyea, M. R., Sy, M., Collatz, G. J.

Effects of shoot water potential (Ψ) and leaf-to-atmosphere vapor pressure difference (VPD) on gas exchange of jack pine (Pinus banksiana Lamb.), black spruce (Picea mariana (Mill.) B.S.P.), and aspen (Populus tremuloides Michx.) were investigated at the northern edge of the boreal forest in Manitoba, …


Journal: Tree Physiology, Volume 17 (8-9): 521-535 (1997). DOI: 10.1093/treephys/17.8-9.521 Sites: CA-Man

Measuring And Modelling Carbon Dioxide And Water Vapour Exchange Over A Temperate Broad-Leaved Forest During The 1995 Summer Drought
Baldocchi, D.

Forests in the south-eastern United States experienced a prolonged dry spell and above-normal temperatures during the 1995 growing season. During this episode, nearly continuous, …


Journal: Plant, Cell And Environment, Volume 20 (9): 1108-1122 (1997). DOI: 10.1046/j.1365-3040.1997.d01-147.x Sites: US-WBW

Environmental Controls Over Isoprene Emission In Deciduous Oak Canopies
Harley, P., Guenther, A., Zimmerman, P.

In summer 1992, isoprene emission was measured on intact leaves and branches of Quercus alba (L.) at two heights in a forest canopy. Isoprene emission capacity (measured at 30 °C and a photosynthetic photon flux density of 1000 μmol m−2 s−1) was significantly higher in sun leaves than in shade …


Journal: Tree Physiology, Volume 17 (11): 705-714 (1997). DOI: 10.1093/treephys/17.11.705 Sites: US-WBW

Growth And Maintenance Respiration Rates Of Aspen, Black Spruce And Jack Pine Stems At Northern And Southern BOREAS Sites
Lavigne, M. B., Ryan, M. G.

We measured stem respiration rates during and after the 1994 growing season of three common boreal tree species at sites near the northern and southern boundaries of the closed-canopy boreal forest in central Canada. The growth respiration coefficient (rg; carbon efflux per μmole of carbon incorporated in structural …


Journal: Tree Physiology, Volume 17 (8-9): 543-551 (1997). DOI: 10.1093/treephys/17.8-9.543 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Controls Over Monoterpene Emissions From Boreal Forest Conifers
Lerdau, M., Litvak, M., Palmer, P., Monson, R.

We investigated controls over the emission of monoterpenes from two species of boreal forest conifers, black spruce (Picea mariana Miller (B.S.P.)) and jack pine (Pinus banksiana Lamb). Monoterpenes are important in plants as carbon-based defensive compounds and in the atmosphere as photochemically reactive compounds …


Journal: Tree Physiology, Volume 17 (8-9): 563-569 (1997). DOI: 10.1093/treephys/17.8-9.563 Sites: CA-Oas, CA-Obs, CA-Ojp

Transpiration Of A Boreal Pine Forest Measured By Branch Bag, Sap Flow And Micrometeorological Methods
Saugier, B., Granier, A., Pontailler, J. Y., Dufrene, E., Baldocchi, D. D.

Three independent methods were used to evaluate transpiration of a boreal forest: the branch bag, sap flow and eddy covariance methods. The branch bag method encloses several thousand needles and gives a continuous record of branch transpiration. The sap flow method provides a continuous record of sap velocity and an estimate of …


Journal: Tree Physiology, Volume 17 (8-9): 511-519 (1997). DOI: 10.1093/treephys/17.8-9.511 Sites: CA-Obs

A Physiological Basis For Biosphere-Atmosphere Interactions In The Boreal Forest: An Overview
Margolis, H. A., Ryan, M. G.
Interdisciplinary field experiments for global change research are large, intensive efforts that study the controls on fluxes of carbon, water, trace gases, and energy between terrestrial ecosystems and the atmosphere at a range of spatial scales. Forest ecophysiology can make significant contributions to …


Journal: Tree Physiology, Volume 17 (8-9): 491-499 (1997). DOI: 10.1093/treephys/17.8-9.491 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Seasonal Variation Of Energy And Water Vapor Exchange Rates Above And Below A Boreal Jack Pine Forest Canopy
Baldocchi, D. D., Vogel, C. A., Hall, B.

Fluxes of energy and water vapor over boreal forest stands are expected to vary during the growing season due to temporal variations in solar energy, soil and air temperature, soil moisture, photosynthetic …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28939-28951 (1997). DOI: 10.1029/96jd03325 Sites: CA-Ojp