Forest fire history of Desolation Peak, Washington

1991 ◽  
Vol 21 (1) ◽  
pp. 83-83
Author(s):  
James K. Agee ◽  
Mark Finney ◽  
Roland de Gouvenain
Keyword(s):  
Forest Fire ◽  
Fire History ◽  
History Of

not available

scholarly journals The Accessibility of Post-Fire Areas for Mechanized Thinning Operations

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 471
Author(s):  
Dariusz Kulak ◽  
Janusz M. Sowa ◽  
Grzegorz Szewczyk ◽  
Arkadiusz Stańczykiewicz
Keyword(s):  
Bearing Capacity ◽  
Forest Fire ◽  
Soil Compaction ◽  
Fire History ◽  
Timber Harvesting ◽  
Average Value ◽  
Penetrometer Resistance ◽  
History Of ◽  
Thinning Operations ◽  
And Control

In 1992, in Southern Poland, large areas of Silesian forests were affected by the country’s largest forest fire. Stands introduced in the 9000-ha post-fire region are currently undergoing early thinning. Due to the scope of these treatments, the chance for their timely implementation is ensured only by the application of cut-to-length (CTL) technologies, i.e., with the use of harvesters and forwarders. The use of CTL technologies may, however, be difficult due to the fire history of these stands, which could affect the bearing capacity of their soils. The objective of this study is to determine the accessibility of stands for forest machines in relation to the bearing capacity of the soils and changes in soil compaction in the post-fire sites. Soil compaction was measured in terms of penetrometer resistance in the stands introduced in the post-fire area in question, as well as in control stands growing on five different soil types. It was shown that in the topsoil layer—from 8 to 18 cm thick depending on the soil type—differences in soil compaction in the post-fire and control areas were relatively small. The impacts of the forest fire—manifested as a significant increase in the compaction of the forest soils—were still visible, but only in the deeper layers of the soil profile. In all of the compared pairs of forest compartments located in the stands regenerated after the fire, significantly higher values of cone indexes (CI) were found. The average value of this index in the post-fire stands was 2.15 MPa, while in the control stands it was 1.60 MPa, which indicates that in both groups of stands the bearing capacity of the soils should not limit the accessibility for vehicles used for timber harvesting and extraction.

scholarly journals The first forest fire history of the Burabai Region (Kazakhstan)from tree rings of Pinus sylvestris

2017 ◽  
Vol 41 ◽  
pp. 165-174 ◽  
Author(s):  
Kuralay MAZARZHANOVA ◽  
Arailym KOPABAYEVA ◽  
Nesibe KÖSE ◽  
Ünal AKKEMİK
Keyword(s):  
Pinus Sylvestris ◽  
Tree Rings ◽  
Forest Fire ◽  
Fire History ◽  
History Of

Morphometrics of the aerial roots of Kingia australis (Liliales)

1981 ◽  
Vol 29 (1) ◽  
pp. 81 ◽  
Author(s):  
B Lamont
Keyword(s):  
Fire History ◽  
Dead Zone ◽  
Dry Weight ◽  
Root Primordia ◽  
Stem Apex ◽  
Primary Roots ◽  
Aerial Roots ◽  
History Of ◽  
Lateral Branches ◽  
Potential Height

Kingia australis, common in the heaths and forests of south-western Australia, is distinguished from all other grass trees in Australia by the presence of a mantle of concealed aerial roots. A ring of up to 50 root primordia is initiated in winter from the stem apex. In plants more than 1 m high, initiation and commencement of elongation of the primary roots are no longer annual but dependent on the fire history of the plant. These roots descend between the stem and persistent leaf bases at about 2 cm per growing month, sending many lateral branches among the leaf bases. Aerial roots gradually replace the space occupied by the leaf bases until they may account for 45% of the dry weight of the aerial caudex. The caudex of one 6-m-high specimen bore up to 27 roots per cm2 transection of the root mantle, with about 3000 primary roots entering the soil. All underground primary roots (except the initial contractile roots) have an aerial origin and are concentrated vertically under the canopy. After 300-400 years the stem starts to die back from the base, and the aerial roots attached to that portion disintegrate. By propping up the stem and bridging the dead zone of the stem, the living aerial roots greatly extend the potential height and longevity of the plant. In addition, the hairy laterals are ideally located to absorb water and nutrients directly from the leaf bases. Protective and aerating functions are also indicated.

Holocene stand-scale vegetation dynamics and fire history of an old-growth spruce forest in southern Finland

2015 ◽  
Vol 24 (6) ◽  
pp. 731-741 ◽  
Author(s):  
Jennifer L. Clear ◽  
Heikki Seppä ◽  
Niina Kuosmanen ◽  
Richard H. W. Bradshaw
Keyword(s):  
Vegetation Dynamics ◽  
Fire History ◽  
Spruce Forest ◽  
Old Growth ◽  
History Of

Genetic variation in allozymes of western larch

1986 ◽  
Vol 16 (5) ◽  
pp. 1013-1018 ◽  
Author(s):  
Lauren Fins ◽  
Lisa W. Seeb
Keyword(s):  
Genetic Variation ◽  
Genetic Drift ◽  
Fire History ◽  
Glacial History ◽  
Geographic Proximity ◽  
Electrophoretic Variation ◽  
Inland Empire ◽  
Genetic History ◽  
Expected Heterozygosity ◽  
History Of

Seed samples from 19 stands of Larixoccidentalis Nutt. were analyzed for electrophoretic variation at 23 loci. Because sample sizes consisted of only 9 or 10 trees per stand (18–20 alleles per locus per stand), samples were grouped by geographic proximity into four larger samples. For all measures of variation, this species scored lower than most, but within the range observed for other western conifers. Most of the variation was found within rather than between the population groups. The single southern sample appeared to be genetically distinct from the others. Although some variation was observed between individual stand samples in expected heterozygosity, the consistently low values for all samples suggest that genetic drift has played a major role in the genetic history of the species in the Inland Empire, both through its glacial history in postulated refugia and through fire history in recent times.

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