Physiological responses to elevated CO2 at the leaf and canopy-level were studied in an intact pine (Pinus taeda) forest ecosystem exposed to elevated CO2 using a free-air CO2 enrichment (FACE) technique. Normalized canopy water-use of trees exposed to elevated …
Journal: Oecologia, Volume 104 (2): 139-146 (1995). DOI: 10.1007/bf00328578 Sites: US-Dk3
The scaling of CO2 and water vapour transfer from leaf to canopy dimensions was achieved by integrating mechanistic models for physiological (photosynthesis, stomatal …
Journal: Plant, Cell And Environment, Volume 18 (10): 1157-1173 (1995). DOI: 10.1111/j.1365-3040.1995.tb00626.x Sites: US-WBW
In order to parametrize a leaf submodel of a canopy level gas-exchange model, a series of photosynthesis and stomatal conductance measurements were made on leaves of white …
Journal: Plant, Cell And Environment, Volume 18 (10): 1146-1156 (1995). DOI: 10.1111/j.1365-3040.1995.tb00625.x Sites: US-WBW
Net photosynthesis was measured under field conditions in 23-year-old slash pine (Pinus elliottii Engelm. var. elliottii) trees to determine how it was affected by fertilization and climate. There was only a small decrease in rates of net photosynthesis from late summer through winter demonstrating that appreciable …
Journal: Tree Physiology, Volume 14 (11): 1215-1227 (1994). DOI: 10.1093/treephys/14.11.1215 Sites: US-SP1
The concentration, contents, and distribution of nutrients, metals, and soil materials were quantified at the Howland Integrated Forest Study (HIFS) site in eastern Maine. The …
Journal: Canadian Journal Of Soil Science, Volume 73 (3): 317-328 (1993). DOI: 10.4141/cjss93-034 Sites: US-Ho1
Journal: Science, Volume 260 (5112): 1314-1317 (1993). DOI: 10.1126/science.260.5112.1314 Sites: US-Ha1
Results of an experiment conducted to quantify the ozone deposition onto a deciduous forest stand in an acid-precipitation-impacted area of Canada are presented and discussed. The ozone deposition data were obtained above and within the forest canopy. The deposition process …
Journal: Agricultural And Forest Meteorology, Volume 62 (1-2): 1-18 (1992). DOI: 10.1016/0168-1923(92)90002-l Sites: CA-Cbo
In order to develop a model of the carbon cycle for mature slash pine (Pinus elliottii) stands in north Florida, we studied seasonal variation in leaf area index (LAI, allsided), aboveground biomass increment …
Journal: Ecological Monographs, Volume 61 (1): 33-51 (1991). DOI: 10.2307/1942998 Sites: US-SP1
The eddy correlation method has great potential for directly measuring trace gas fluxes at the floor of a forest canopy, but a thorough validation study has not been yet conducted. Another appeal of the eddy …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 96 (D4): 7271-7285 (1991). DOI: 10.1029/91jd00269 Sites: US-WBW
Two indirect gap fraction methods for estimating leaf area index (LAI) are compared with estimates
from litterfall collections in a mixed-age oak-hickory forest. One indirect method uses averaged,
direct beam penetration data obtained with a moving tram. The second uses a portable light
sensor system that measures diffuse light …
Journal: Agricultural Forest Meteorology, Volume 57: 107-128 (1991). DOI: https://doi.org/10.1016/0168-1923(91)90081-Z Sites: US-WBW