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Publications Found: 1373

Estimating Basal Area And Stem Volume For Individual Trees From Lidar Data
Chen, Q., Gong, P., Baldocchi, D., Tian, Y. Q.

This study proposes a new metric called canopy geometric volume G, which is derived from small-footprint lidar data, for estimating individual-tree basal area and stem volume. Based on the plant allometry relationship, we found that basal area B is exponentially related to G (B = β₁G^3/4, where β₁ …

Journal: Photogrammetric Engineering & Remote Sensing, Volume 73 (12): 1355-1365 (2007), ISBN . DOI: 10.14358/pers.73.12.1355 Sites: US-Ton

Regional Carbon Fluxes From An Observationally Constrained Dynamic Ecosystem Model: Impacts Of Disturbance, CO2 Fertilization, And Heterogeneous Land Cover
Desai, A.R., Moorcroft, P.R., Bolstad, P.V., and Davis, K.J.

The Ecosystem Demography (ED) model was parameterized with ecological, forest inventory, and historical land use observations in an intensively managed, wetland-rich forested landscape in the upper midwest United States. Model results were evaluated against a regional network of eddy covariance flux towers and analyzed about the …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 112 (G1): n/a-n/a (2007), ISBN . DOI: 10.1029/2006JG000264 Sites: US-PFa

Concentrations And Fluxes Of Dissolved Organic Carbon In An Age-Sequence Of White Pine Forests In Southern Ontario, Canada
Peichl, M., Moore, T. R., Arain, M. A., Dalva, M., Brodkey, D., McLaren, J.

We determined concentrations and fluxes of dissolved organic carbon (DOC) in precipitation, throughfall, forest floor and mineral soil leachates from June 2004 to May 2006 across an age-sequence (2-, 15-, 30-, and 65-year-old) of white pine (Pinus strobus L.) forests in southern Ontario, Canada. …

Journal: Biogeochemistry, Volume 86 (1): 1-17 (2007), ISBN . DOI: 10.1007/s10533-007-9138-7 Sites: CA-TP1

Ecosystem Water Use Efficiency In A Semiarid Shrubland And Grassland Community
Emmerich, W. E.

Ecosystem water use efficiency (EWUE) is defined as the net carbon uptake per amount of water lost from the ecosystem and is a useful measure of the functionality in semiarid shrub and grassland communities. C₄ grasses have higher water use efficiency (WUE) than do C₃ shrubs, although it has been postulated …

Journal: Rangeland Ecology & Management, Volume 60 (5): 464-470 (2007), ISBN . DOI: 10.2111/1551-5028(2007)60[464:ewueia]2.0.co;2 Sites: US-Wkg

Factors Controlling CO2 Exchange On Timescales From Hourly To Decadal At Harvard Forest
Urbanski, S., Barford, C., Wofsy, S., Kucharik, C., Pyle, E., Budney, J., McKain, K., Fitzjarrald, D., Czikowsky, M., Munger, J. W.

We analyzed 13 years (1992−2004) of CO₂ flux data, biometry, and meteorology from a mixed deciduous forest in central Massachusetts. Annual net uptake of CO₂ ranged from 1.0 to …

Journal: Journal Of Geophysical Research, Volume 112 (G2): (2007), ISBN . DOI: 10.1029/2006JG000293 Sites: US-Ha1

Separating The Effects Of Albedo From Eco-Physiological Changes On Surface Temperature Along A Successional Chronosequence In The Southeastern United States
Juang, J.-Y., Katul, G.G., Siqueira, M.B.S., Stoy, P.C., Novick, K.A.

In the southeastern United States (SE), the conversion of abandoned agricultural land to forests is the dominant feature of land-cover change. However, few attempts have been made to quantify the impact of such conversion on surface temperature. Here, this issue is explored experimentally and analytically in three adjacent ecosystems …

Journal: Geophysical Research Letters, Volume 34 (21): n/a-n/a (2007), ISBN . DOI: 10.1029/2007gl031296 Sites: US-Dk3

A Long-Term Record Of Carbon Exchange In A Boreal Black Spruce Forest: Means, Responses To Interannual Variability, And Decadal Trends
Dunn, A. L., Barford, C. C., Wofsy, S. C., Goulden, M. L., Daube, B. C.

We present a decadal (1994–2004) record of carbon dioxide flux in a 160-year-old black spruce forest/veneer bog complex in central Manitoba, Canada. The ecosystem shifted …

Journal: Global Change Biology, Volume 13 (3): 577-590 (2007), ISBN . DOI: 10.1111/j.1365-2486.2006.01221.x Sites: CA-Man

CO2 Balance Of Boreal, Temperate, And Tropical Forests Derived From A Global Database
Luyssaert, S., Inglima, I., Jung, M., Richardson, A. D., Reichstein, M., Papale, D., Piao, S. L., Schulze, E., Wingate, L., Matteucci, G., Aragao, L., Aubinet, M., Beer, C., Bernhofer, C., Black, K. G., Bonal, D., Bonnefond, J., Chambers, J., Ciais, P., Cook, B., Davis, K. J., Dolman, A. J., Gielen, B., Goulden, M., Grace, J., Granier, A., Grelle, A., Griffis, T., Grxfcnwald, T., Guidolotti, G., Hanson, P. J., Harding, R., Hollinger, D. Y., Hutyra, L. R., Kolari, P., Kruijt, B., Kutsch, W., Lagergren, F., Laurila, T., Law, B. E., Le Maire, G., Lindroth, A., Loustau, D., Malhi, Y., Mateus, J., Migliavacca, M., Misson, L., Montagnani, L., Moncrieff, J., Moors, E., Munger, J. W., Nikinmaa, E., Ollinger, S. V., Pita, G., Rebmann, C., Roupsard, O., Saigusa, N., Sanz, M. J., Seufert, G., Sierra, C., Smith, M., Tang, J., Valentini, R., Vesala, T., Janssens, I. A.

Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties …

Journal: Global Change Biology, Volume 13 (12): 2509-2537 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01439.x Sites: BR-Ma2

Postfire Carbon Pools And Fluxes In Semiarid Ponderosa Pine In Central Oregon
Irvine, J., Law, B. E., Hibbard, K. A.

Forest fire dramatically affects the carbon storage and underlying mechanisms that control the carbon balance of recovering ecosystems. In western North America where fire extent has increased in recent years, we measured carbon pools and fluxes in moderately and severely burned forest stands 2 years after a fire to determine the …

Journal: Global Change Biology, Volume 13 (8): 1748-1760 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01368.x Sites: US-Me1

Temporal Dynamics And Spatial Variability In The Enhancement Of Canopy Leaf Area Under Elevated Atmospheric CO2
McCarthy, H. R., Oren, R., Finzi, A. C., Ellsworth, D. S., Kim, H., Johnsen, K. H., Millar, B.

Increased canopy leaf area (L) may lead to higher forest productivity and alter processes such as species dynamics and ecosystem mass and energy fluxes. Few CO₂ enrichment studies have been conducted in closed canopy forests and none have shown a sustained enhancement of L. We reconstructed 8 years (1996–2003) …

Journal: Global Change Biology, Volume 13 (12): 2479-2497 (2007), ISBN . DOI: 10.1111/j.1365-2486.2007.01455.x Sites: US-Dk3

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