Computer programs written in GAUSS(TM) for IBM compatible personal computers are described that perform dynamic tree ring modeling with climate data; the underlying theory is also described. The programs and a separate users manual are available from the authors, although users must have the GAUSS…
Keywords: Kalman filter, dendrochronology, dendroclimatology
Source: Gen. Tech. Rep. SO-70. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 18 p.
Age structure in a stand of very old-age Engelmann spruce is described. The site is at 3,505 m near treeline in the Fraser Experimental Forest in central Colorado. The site contains the oldest Engelmann spruce trees yet reported in the literature; the oldest tree is at least 852 years of age.
Keywords: dendrochronology, old-age, old growth, Picea engelmannii, tree rings, Fraser Experimental Forest
Source: Res. Note RM-RN-534. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 6 p.
Abstract - Channels that have been scoured to bedrock by debris flows provide unique opportunities to calculate the rate of sediment and wood accumulation in low-order streams, to understand the temporal succession of channel morphology following disturbance, and to make inferences about processes…
Keywords: PSW4351, debris flows, sedimentation, large wood, dendrochronology, bedrock streams
Source: Earth Surface Processes and Landforms 28(4): 409-424.
We used dendrochronological methods to construct three fire history chronologies in the interior of the Boston Mountains of Arkansas from 281 dated fire scars identified on 86 shortleaf pine (Pinus echinata) remnants and trees. We describe and contrast these interior sites with sites on the…
Keywords: dendrochronology, human population, fire scar, climate, drought, ENSO, AMO
Source: Forest Ecology and Management. 234: 293–304
Remains of a Holocene drowned forest in southern Lake Huron discovered in 12.5 m of water (164 m above sea level), 4.5 km east of Lexington, Michigan USA (Sanilac site), provided wood to investigate environment and lake history using several proxies. Macrofossil evidence indicates a forest…
Keywords: Lake Stanley, tree rings, stable isotopes, Lake Huron, Holocene, lake levels, Thuja, Paleoclimatology, radiocarbon dating, climatic changes, Michigan, plant communities, Paleoecology, Paleobotany, Paleobiology, fossil trees, carbon isotopes, dendrochronology, tree-rings, Lake Huron
Source: Quaternary research. Vol. 66 (2006): pages 67-77.
This paper describes the removal of extraneous color from increment cores of conifers prior to reflected-light image analysis of tree rings. Ponderosa pine in central New Mexico was chosen for study. Peroxide bleaching was used as a pretreatment to remove extraneous color and still yield usable…
Keywords: Wood color, dendrochronology, image analysis, summer precipitation, New Mexico, reflectance, rainfall, precipitation, regression analysis, dendroclimatology, wood color, dendrochronology, tree rings, image analysis, bleaching, color of wood, ponderosa pine, peroxides
Source: Wood and fiber science. Vol. 39, no. 1 (2007): pages 173-183.
A network of 32 drought sensitive tree-ring chronologies is used to reconstruct mean water year flow on the Columbia River at The Dalles, Oregon, since 1750. The reconstruction explains 30 percent of the variability in mean water year (October to September) flow, with a large portion of unexplained…
Keywords: Drought, climate change, dendrochronology, Columbia River, Pacific Decadal Oscillation, tree rings, paleohydrology
Source: Journal of the American Water Resources Association. December: 1579-1592
The regeneration and dominance of northern red oak (Quercus rubra L.) has been associated with fire throughout eastern North America. Red oak in central Ontario grows near the northern edge of its distribution in mixed hardwood - coniferous forests under mesic conditions where it competes with more…
Keywords: northern red oak, white pine, fire history, ecology, anthropogenic, fire regime, dendrochronology
Source: Forestry chronicle. (Mar./Apr) 76(2): 339-347.
A single ponderosa pine tree found in the central Black Hills of SouthDakota revealed its age of more than 700 years by its tree rings taken from coring in 1992. The purpose of this study was to examine historic climatic patterns from the 13th century through most of the 20th century as inferred…
Keywords: Pinus ponderosa, dendrochronology, dendroclimatology, climate change, drought, precipitation, historical records, Black Hills, South Dakota
Source: Proceedings of the South Dakota Academy of Science. 78: 149-162.
Ecotones are boundaries between plant assemblages that can represent a physiological or competitive limit of species’ local distributions, usually through one or more biotic or abiotic constraints on species’ resource requirements. However, ecotones also result from the effects of chronic or…
Keywords: dendrochronology, crossdating, fire chronology, fire frequency, Northern Great Plains, grassland fire regimes, Black Hills, South Dakota
Source: Ecoscience. 6(4): 539-547.