SPRUCE-FIR CLIMAX VEGETATION IN SOUTHWESTERN ALBERTA
نویسندگان
چکیده
منابع مشابه
Controls on Vegetation Structure in Southwestern
Long-term studies can broaden our ecological understanding and are particularly important when examining contingent effects that involve changes to dominance by long-lived species. Such a change occurred during the last century in Southwestern (USA) ponderosa pine (Pinus ponderosa) forests. We used five livestock grazing exclosures established in 1912 to quantify vegetation structure in 1941 an...
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SMITH K.T., ČUFAR K. & LEVANIČ T. 1999. Temporal stability and dendroclimatology in silver fir and red spruce. Phyton (Horn, Austria) 39 (3): (xxx) (xxx). Dendroclimatology uses precisely dated tree-ring series and climate measurements to reconstruct climate for periods prior to instrumented records. Dendroclimatology requires a predictable, relationship between growth and climate. Tree-ring se...
متن کاملPonderosa Pine, Mixed Conifer, and Spruce-fir Forests
Before European settlement of the interior west of the United States, coniferous forests of this region were influenced by many disturbance regimes, primarily fires, insects, diseases, and herbivory, which maintained a diversity of successional stages and vegetative types across landscapes. Activities after settlement, such as fire suppression, grazing, and logging significantly altered these d...
متن کاملFresh-stem bending of silver fir and Norway spruce.
The bending and growth characteristics of large fresh stems from four silver fir (Abies alba Mill.) and three Norway spruce (Picea abies (L.) Karst.) trees were studied. Twenty logs taken from different stem heights were subjected to four-point bending tests. From the bending test records, we calculated stress-strain curves, which accounted for detailed log taper, shear deformation and self wei...
متن کاملDevelopment of vegetation and climate in the southwestern United States.
Plant macrofossils in ancient packrat middens document the presence of woodland communities in most of the present Chihuahuan, Sonoran, and Mohave deserts in the southwestern United States during the late Wisconsinan (22,000 to 11,000 years before present by radiocarbon dating). Warm desert species were common in the woodlands at lower elevations and mixed conifer and subalpine forests were pre...
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ژورنال
عنوان ژورنال: The Forestry Chronicle
سال: 1956
ISSN: 0015-7546,1499-9315
DOI: 10.5558/tfc32346-3