AmeriFlux Publications from the Community

Potential Of MODIS Ocean Bands For Estimating CO2flux From Terrestrial Vegetation: A Novel Approach
Rahman, A. F., Cordova, V. D., Gamon, J. A., Schmid, H. P., Sims, D. A.

A physiologically-driven spectral index using two ocean-color bands of MODIS satellite sensor showed great potential to track seasonally changing photosynthetic light use efficiency (LUE) and stress-induced reduction in net primary productivity (NPP) of terrestrial vegetation. Based on these findings, we developed a simple “continuous …

Journal: Geophysical Research Letters, Volume 31 (10): n/a-n/a (2004), ISBN . DOI: 10.1029/2004gl019778 Sites: US-MMS

Limitations To Carbon Mineralization In Litter And Mineral Soil Of Young And Old Ponderosa Pine Forests
Kelliher, F., Ross, D., Law, B., Baldocchi, D., Rodda, N.

Summer drought is a feature of the semi-arid region of central Oregon, USA, where vegetation naturally develops into ponderosa pine (Pinus ponderosa var. Laws) forest. Forest management consists of clearcut harvest and natural regeneration. Soil microbial activity is interconnected with forest processes because substrate …

Journal: Forest Ecology And Management, Volume 191 (1-3): 201-213 (2004), ISBN . DOI: 10.1016/j.foreco.2003.12.005 Sites: US-Me4, US-Me5

Response To Comment On "Impacts Of Fine Root Turnover On Forest NPP And Soil C Sequestration Potential"
Matamala, R., Gonzalez-Meler, M. A., Jastrow, J. D., Norby, R. J., Schlesinger, W. H.

We commend Luo et al. (1) for their effort to extend the analysis of our data (2) …

Journal: Science, Volume 304 (5678): 1745d-1745d (2004), ISBN . DOI: 10.1126/science.1099340 Sites: US-Dk3, US-WBW

Response Of The Carbon Isotopic Content Of Ecosystem, Leaf, And Soil Respiration To Meteorological And Physiological Driving Factors In A Pinus Ponderosa Ecosystem
McDowell, N. G., Bowling, D. R., Bond, B. J., Irvine, J., Law, B. E., Anthoni, P., Ehleringer, J. R.

Understanding the controls over ecosystem-respired δ¹³C (δ¹³C_R) is important for applications of isotope-based models of the global carbon budget as well as for understanding ecosystem-level variation in isotopic discrimination (Δ). Discrimination may be strongly dependent on synoptic-scale variation …

Journal: Global Biogeochemical Cycles, Volume 18 (1): n/a-n/a (2004), ISBN . DOI: 10.1029/2003gb002049 Sites: US-Me2, US-Me4

A Global Relationship Between The Heterotrophic And Autotrophic Components Of Soil Respiration?
Bond-Lamberty, B., Wang, C., Gower, S. T.

Soil surface CO₂ flux (R_S) is overwhelmingly the product of respiration by roots (autotrophic respiration, R_A) and soil organisms (heterotrophic respiration, R_H). Many studies have attempted to partition R_S into these two components, with highly …

Journal: Global Change Biology, Volume 10 (10): 1756-1766 (2004), ISBN . DOI: 10.1111/j.1365-2486.2004.00816.x Sites: BR-Ma2, CA-Man, CA-Oas, CA-Obs, US-Dk1, US-Dk2, US-Dk3, US-Ha2, US-Me1, US-Me3, US-Me4, US-Me5, US-WBW

Biometric And Micrometeorological Measurements Of Tropical Forest Carbon Balance
Miller, S. D., Goulden, M. L., Menton, M. C., da Rocha, H. R., de Freitas, H. C., Figueira, A. M., Dias de Sousa, C. A.

We used two independent approaches, biometry and micrometeorology, to determine the net ecosystem production (NEP) of an old growth forest in Pará, Brazil. Biometric inventories indicated that the forest was either a source or, at most, a modest sink of carbon from 1984 to 2000 (+0.8 ± 2 Mg C·ha⁻¹·yr⁻¹; …

Journal: Ecological Applications, Volume 14 (sp4): 114-126 (2004), ISBN . DOI: 10.1890/02-6005 Sites: BR-Sa3

How Soil Moisture, Rain Pulses, And Growth Alter The Response Of Ecosystem Respiration To Temperature
Xu, L., Baldocchi, D. D., Tang, J.

In this paper, we analyzed 3 years of carbon flux data from continuous eddy covariance measurements to investigate how soil moisture, rain pulses, and growth alter the response of ecosystem respiration …

Journal: Global Biogeochemical Cycles, Volume 18 (4): n/a-n/a (2004), ISBN . DOI: 10.1029/2004gb002281 Sites: US-Ton, US-Var

Disturbance And Net Ecosystem Production Across Three Climatically Distinct Forest Landscapes
Campbell, J. L., Sun, O. J., Law, B. E.

Biometric techniques were used to measure net ecosystem production (NEP) across three climatically distinct forest chronosequences in Oregon. NEP was highly negative immediately following stand-replacing disturbance in all forests and recovered to positive values by 10, 20, and 30 years of age for the mild and mesic Coast Range, …

Journal: Global Biogeochemical Cycles, Volume 18 (4): n/a-n/a (2004), ISBN . DOI: 10.1029/2004gb002236 Sites: US-Me2, US-Me4

Supply-Side Controls On Soil Respiration Among Oregon Forests
Campbell, J. L., Sun, O. J., Law, B. E.

To test the hypothesis that variation in soil respiration is related to plant production across a diverse forested landscape, we compared annual soil respiration rates with net primary production and the subsequent allocation of carbon to various ecosystem pools, including leaves, fine roots, forests floor, and mineral soil for 36 …

Journal: Global Change Biology, Volume 10 (11): 1857-1869 (2004), ISBN . DOI: 10.1111/j.1365-2486.2004.00850.x Sites: US-Me2, US-Me4, US-Me5

How Plant Functional-Type, Weather, Seasonal Drought, And Soil Physical Properties Alter Water And Energy Fluxes Of An Oak–Grass Savanna And An Annual Grassland
Baldocchi, D. D., Xu, L., Kiang, N.

Savannas and open grasslands often co-exist in semi-arid regions. Questions that remain unanswered and are of interest to biometeorologists include: how do these contrasting landscapes affect the exchanges of energy on seasonal and annual time scales; and, do biophysical constraints imposed by water supply and water demand …

Journal: Agricultural And Forest Meteorology, Volume 123 (1-2): 13-39 (2004), ISBN . DOI: 10.1016/j.agrformet.2003.11.006 Sites: US-Ton, US-Var

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