Publications

Publications Found: 1437

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). DOI: 10.2111/1551-5028(2007)60[464:ewueia]2.0.co;2 Sites: US-Wkg

Changes In Vegetation Condition And Surface Fluxes During NAME 2004
Watts, C. J., Scott, R. L., Garatuza-Payan, J., Rodriguez, J. C., Prueger, J. H., Kustas, W. P., Douglas, M.

The vegetation in the core region of the North American monsoon (NAM) system changes dramatically after the onset of the summer rains so that large changes may be expected in the surface fluxes of radiation, heat, and moisture. Most of this region lies in the rugged terrain of western Mexico and very few measurements of these fluxes …


Journal: Journal Of Climate, Volume 20 (9): 1810-1820 (2007). DOI: 10.1175/jcli4088.1 Sites: US-Whs, US-Wkg

Remotely Sensed Measurements Of Forest Structure And Fuel Loads In The Pinelands Of New Jersey
SKOWRONSKI, N., CLARK, K., NELSON, R., HOM, J., PATTERSON, M.

We used a single-beam, first return profiling LIDAR (Light Detection and Ranging) measurements of canopy height, intensive biometric measurements in plots, and Forest Inventory and Analysis (FIA) data to quantify forest structure and ladder fuels (defined as vertical fuel continuity between the understory and canopy) in the New Jersey …


Journal: Remote Sensing Of Environment, Volume 108 (2): 123-129 (2007). DOI: 10.1016/j.rse.2006.09.032 Sites: US-Ced, US-Slt

Intraseasonal Variation In Water And Carbon Dioxide Flux Components In A Semiarid Riparian Woodland
Yepez, E. A., Scott, R. L., Cable, W. L., Williams, D. G.

We investigated how the distribution of precipitation over a growing season influences the coupling
of carbon and water cycle components in a semiarid floodplain woodland dominated by the deep-rooted velvet mesquite (Prosopis velutina). Gross ecosystem production (GEP) and ecosystem respiration (Reco) were frequently uncoupled because …


Journal: Ecosystems, Volume 10 (7): 1100-1115 (2007). DOI: 10.1007/s10021-007-9079-y Sites: US-CMW

Filtering Airborne Laser Scanning Data With Morphological Methods
Chen, Q., Gong, P., Baldocchi, D., Xie, G.

Filtering methods based on morphological operations have been developed in some previous studies. The biggest challenge for these methods is how to keep the terrain features unchanged while using large window sizes for the morphological opening. Zhang et al. (2003) tried to achieve this goal, but their method required the assumption …


Journal: Photogrammetric Engineering & Remote Sensing, Volume 73 (2): 175-185 (2007). DOI: 10.14358/pers.73.2.175 Sites: US-Ton

Coarse Woody Debris And The Carbon Balance Of A North Temperate Forest
Gough, C. M., Vogel, C. S., Kazanski, C., Nagel, L., Flower, C. E., Curtis, P. S.


Journal: Forest Ecology And Management, Volume 244 (1-3): 60-67 (2007). DOI: 10.1016/j.foreco.2007.03.039 Sites: US-UMB

Plant Species Composition And Productivity Following Permafrost Thaw And Thermokarst In Alaskan Tundra
Schuur, E. A., Crummer, K. G., Vogel, J. G., Mack, M. C.

Climate warming is expected to have a large impact on plant species composition and productivity in northern latitude ecosystems. Warming can affect vegetation communities directly through temperature effects on plant growth and indirectly through alteration of soil nutrient availability. In addition, warming can cause permafrost …


Journal: Ecosystems, Volume 10 (2): 280-292 (2007). DOI: 10.1007/s10021-007-9024-0 Sites: US-EML

Age-Dependent Changes In Ecosystem Carbon Fluxes In Managed Forests In Northern Wisconsin, USA
Noormets, A., Chen, J., Crow, T. R.

The age-dependent variability of ecosystem carbon (C) fluxes was assessed by measuring the net ecosystem exchange of C (NEE) in five managed forest stands in northern Wisconsin, USA. The study sites ranged in age from 3-year-old clearcut to mature stands (65 years). All stands, except the clearcut, …


Journal: Ecosystems, Volume 10 (2): 187-203 (2007). DOI: 10.1007/s10021-007-9018-y Sites: US-Wi0, US-Wi1, US-Wi2, US-Wi3, US-Wi4, US-Wi6, US-Wi8

Mature Semiarid Chaparral Ecosystems Can Be A Significant Sink For Atmospheric Carbon Dioxide
Luo, H., Oechel, W. C., Hastings, S. J., Zulueta, R., Qian, Y., Kwon, H.

Carbon flux in arid and semiarid area shrublands, especially in old-growth shrub ecosystems, has been rarely studied using eddy covariance techniques. In this study, eddy covariance measurements over a 100-year old-growth chamise-dominated chaparral shrub ecosystem were conducted for 7 years from 1996 to 2003. A carbon sink, from …


Journal: Global Change Biology, Volume 13 (2): 386-396 (2007). DOI: 10.1111/j.1365-2486.2006.01299.x Sites: US-SO2, US-SO3, US-SO4

Comparison Of Net Ecosystem CO2 Exchange In Two Peatlands In Western Canada With Contrasting Dominant Vegetation, Sphagnum And Carex
Glenn, A. J., Flanagan, L. B., Syed, K. H., Carlson, P. J.

Net ecosystem carbon dioxide exchange was measured in two contrasting peatlands in northern Alberta, Canada using the eddy covariance technique during the growing season (May–October). Sphagnum spp. made up approximately 66% of the total LAI (1.52 m2 m−2) at the poor fen and the total N content …


Journal: Agricultural And Forest Meteorology, Volume 140 (1-4): 115-135 (2006). DOI: 10.1016/j.agrformet.2006.03.020 Sites: CA-WP2, CA-WP3