Tree-Ring Bulletin, Volume 38 (1978)http://hdl.handle.net/10150/2239112024-03-28T22:56:31Z2024-03-28T22:56:31ZTree-Ring Bulletin, Volume 38 (1978)http://hdl.handle.net/10150/2629872020-04-02T10:55:05Z1978-01-01T00:00:00ZTree-Ring Bulletin, Volume 38 (1978)
Complete issue of Tree-Ring Bulletin.
1978-01-01T00:00:00ZThe X-Ray Technique as Applied to DendroclimatologySchweingruber, F. H.Fritts, H. C.Bräker, O. U.Drew, L. G.Schär, E.http://hdl.handle.net/10150/2604202020-04-02T11:35:46Z1978-01-01T00:00:00ZThe X-Ray Technique as Applied to Dendroclimatology
Schweingruber, F. H.; Fritts, H. C.; Bräker, O. U.; Drew, L. G.; Schär, E.
1978-01-01T00:00:00ZEffects of Defoliation by Douglas-Fir Tussock Moth on Ring Sequences of Douglas-Fir and Grand FirBrubaker, Linda B.http://hdl.handle.net/10150/2604192020-04-02T11:39:41Z1978-01-01T00:00:00ZEffects of Defoliation by Douglas-Fir Tussock Moth on Ring Sequences of Douglas-Fir and Grand Fir
Brubaker, Linda B.
Increment cores were collected from 10 stands in mixed-conifer forest stands which had suffered varying levels of Douglas-fir tussock moth defoliation during 1946, 1964, and 1973 infestations in north central Idaho. Ring-width measurements, standardized to remove inherent growth trends, were compared between host (Douglas-fir and grand fir) and nonhost (western larch, ponderosa pine, western white pine) species for evidence of growth losses due to defoliation. Heavy defoliation caused growth of host species to decrease 75 %-90% in one year. Normal growth rates returned within 3-4 years after maximum defoliation, however. The effect of moderate defoliation could not be reliably identified in the data.
1978-01-01T00:00:00ZDating the Geographical Migration of Quergus Petraea and Q. Robur in Holocene TimesFletcher, Johnhttp://hdl.handle.net/10150/2604052020-04-02T11:34:26Z1978-01-01T00:00:00ZDating the Geographical Migration of Quergus Petraea and Q. Robur in Holocene Times
Fletcher, John
Huber identified in samples from the forests of central Europe features for characterising by their wood structure the two species of British oak. We have confirmed for recently felled oaks the suitability of his method of analysis and applied it to timbers from ancient buildings and to samples from sub-fossil oaks. The two species appear to have persisted in separate locations during the last ice age. Such analysis of the numerous Holocene oaks in Europe now being dated by den - drochronology offers the possibility of studying the separate migration of the species.
1978-01-01T00:00:00Z