Publications

Publications Found: 1378

Long-Term Impacts Of Agriculture On Soil Carbon And Nitrogen In New England Forests
Compton, J. E., Boone, R. D.

Abandonment and reforestation of agricultural lands has been a major influence on the landscape of eastern North America. Cultivation and soil amendments can dramatically alter soil nutrient pools and cycling, …


Journal: Ecology, Volume 81 (8): 2314-2330 (2000), ISBN . DOI: 10.1890/0012-9658(2000)081[2314:LTIOAO]2.0.CO;2 Sites: US-Ha2

Canopy And Leaf Level 2-Methyl-3-Buten-2-Ol Fluxes From A Ponderosa Pine Plantation
Schade, G. W., Goldstein, A. H., Gray, D. W., Lerdau, M. T.

Canopy and leaf level 2-methyl-3-butene-2-ol (methylbutenol, MBO) emissions were measured from a ponderosa pine plantation in the Sierra Nevada mountains from July to October 1998. Canopy scale fluxes were measured using a gradient approach, leaf level fluxes used a flow-through …


Journal: Atmospheric Environment, Volume 34 (21): 3535-3544 (2000), ISBN . DOI: 10.1016/s1352-2310(00)00120-5 Sites: US-Blo

Spatial And Seasonal Variability Of Photosynthetic Parameters And Their Relationship To Leaf Nitrogen In A Deciduous Forest
Wilson, K. B., Baldocchi, D. D., Hanson, P. J.

We used gas exchange techniques to estimate maximum rate of carboxylation (Vcmax), a measure of photosynthetic capacity, in the understory and upper crown of a closed deciduous forest over two seasons. There was extensive variability in photosynthetic capacity as a result of vertical canopy position, species type, …


Journal: Tree Physiology, Volume 20 (9): 565-578 (2000), ISBN . DOI: 10.1093/treephys/20.9.565 Sites: US-WBW

Transpiration And Whole-Tree Conductance In Ponderosa Pine Trees Of Different Heights
Ryan, M. G., Bond, B. J., Law, B. E., Hubbard, R. M., Woodruff, D., Cienciala, E., Kucera, J.

Changes in leaf physiology with tree age and size could alter forest growth, water yield, and carbon fluxes. We measured tree water flux (Q) for 14 ponderosa pine trees in two size classes (12 m tall and ∼40 years old, …


Journal: Oecologia, Volume 124 (4): 553-560 (2000), ISBN . DOI: 10.1007/s004420000403 Sites: US-Me4

Land-Atmosphere Energy Exchange In Arctic Tundra And Boreal Forest: Available Data And Feedbacks To Climate
Eugster, W., Rouse, W. R., Pielke Sr, R. A., Mcfadden, J. P., Baldocchi, D. D., Kittel, T. G., Chapin, F. S., Liston, G. E., Vidale, P. L., Vaganov, E., Chambers, S.

This paper summarizes and analyses available data on the surface energy balance of Arctic tundra and boreal forest. The complex interactions between ecosystems and their surface energy balance are also examined, including climatically induced shifts in ecosystem type that might amplify or reduce the effects of potential climatic …


Journal: Global Change Biology, Volume 6 (S1): 84-115 (2000), ISBN . DOI: 10.1046/j.1365-2486.2000.06015.x Sites: US-Upa

Leaf Senescence Of Quercus Myrtifolia As Affected By Long-Term CO2 Enrichment In Its Native Environment
Li, J., Dijkstra, P., Hymus, G. J., Wheeler, R. M., Piastuch, W. C., Hinkle, C. R., Drake, B. G.

The long-term effects of elevated (ambient plus 350 μmol mol−1) atmospheric CO2 concentration (Ca) on the leaf senescence of Quercus …


Journal: Global Change Biology, Volume 6 (7): 727-733 (2000), ISBN . DOI: 10.1046/j.1365-2486.2000.00347.x Sites: US-KS2

Physiological Models For Scaling Plot Measurements Of CO2 Flux Across An Arctic Tundra Landscape
Vourlitis, G. L., Oechel, W. C., Hope, A., Stow, D., Boynton, B., Verfaillie, J., Zulueta, R., Hastings, S. J.


Journal: Ecological Applications, Volume 10 (1): 60-72 (2000), ISBN . DOI: 10.2307/2640986 Sites: US-Upa

Measuring And Modelling Seasonal Variation Of Carbon Dioxide And Water Vapour Exchange Of A Pinus Ponderosa Forest Subject To Soil Water Deficit
Law, B. E., Williams, M., Anthoni, P. M., Baldocchi, D. D., Unsworth, M. H.

We conducted ecosystem carbon and water vapour exchange studies in an old-growth Pinus ponderosaforest in the Pacific North-west region of the United States. The canopy is heterogeneous, with tall multiaged trees and an open, clumped canopy with low leaf area. Carbon assimilation can occur throughout relatively mild winters, …


Journal: Global Change Biology, Volume 6 (6): 613-630 (2000), ISBN . DOI: 10.1046/j.1365-2486.2000.00339.x Sites: US-Me5

Estimating CO2 Flux From Snowpacks At Three Sites In The Rocky Mountains
McDowell, N. G., Marshall, J. D., Hooker, T. D., Musselman, R.
Soil surface CO2 flux (Fs) is the dominant respiratory flux in many temperate forest ecosystems. Snowpacks increase this dominance by insulating the soil against the low temperature to which aboveground components are exposed. However, measurement of Fs


Journal: Tree Physiology, Volume 20 (11): 745-753 (2000), ISBN . DOI: 10.1093/treephys/20.11.745 Sites: US-GLE

Effects Of Climate Variability On The Carbon Dioxide, Water, And Sensible Heat Fluxes Above A Ponderosa Pine Plantation In The Sierra Nevada (CA)
Goldstein, A., Hultman, N., Fracheboud, J., Bauer, M., Panek, J., Xu, M., Qi, Y., Guenther, A., Baugh, W.

Fluxes of CO2, water vapor, and sensible heat were measured by the eddy covariance method above a young ponderosa pine plantation in the Sierra Nevada Mountains (CA) over two growing seasons (1 June–10 September 1997 and 1 May–30 October 1998). The Mediterranean-type climate of California is characterized by a protracted …


Journal: Agricultural And Forest Meteorology, Volume 101 (2-3): 113-129 (2000), ISBN . DOI: 10.1016/s0168-1923(99)00168-9 Sites: US-Blo