Exceptional Mountains: A Cultural History of the Pacific Northwest Volcanoes by O. Alan Weltzien

2017 ◽  
Vol 52 (3) ◽  
pp. 369-372
Author(s):  
Jeff L. Smoot
Keyword(s):  
Cultural History ◽  
Pacific Northwest ◽  
The Pacific ◽  
History Of

Canopy disturbances over the five-century lifetime of an old-growth Douglas-fir stand in the Pacific Northwest

2002 ◽  
Vol 32 (6) ◽  
pp. 1057-1070 ◽  
Author(s):  
Linda E Winter ◽  
Linda B Brubaker ◽  
Jerry F Franklin ◽  
Eric A Miller ◽  
Donald Q DeWitt
Keyword(s):  
Pacific Northwest ◽  
Variable Density ◽  
Tsuga Heterophylla ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Old Growth ◽  
The Pacific ◽  
History Of ◽  
Horizontal Heterogeneity ◽  
Restoration Strategies

The history of canopy disturbances over the lifetime of an old-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand in the western Cascade Range of southern Washington was reconstructed using tree-ring records of cross-dated samples from a 3.3-ha mapped plot. The reconstruction detected pulses in which many western hemlock (Tsuga heterophylla (Raf.) Sarg.) synchronously experienced abrupt and sustained increases in ringwidth, i.e., "growth-increases", and focused on medium-sized or larger ([Formula: see text]0.8 ha) events. The results show that the stand experienced at least three canopy disturbances that each thinned, but did not clear, the canopy over areas [Formula: see text]0.8 ha, occurring approximately in the late 1500s, the 1760s, and the 1930s. None of these promoted regeneration of the shade-intolerant Douglas-fir, all of which established 1500–1521. The disturbances may have promoted regeneration of western hemlock, but their strongest effect on tree dynamics was to elicit western hemlock growth-increases. Canopy disturbances are known to create patchiness, or horizontal heterogeneity, an important characteristic of old-growth forests. This reconstructed history provides one model for restoration strategies to create horizontal heterogeneity in young Douglas-fir stands, for example, by suggesting sizes of areas to thin in variable-density thinnings.

scholarly journals INVESTIGATING THE EVOLUTIONARY HISTORY OF THE PACIFIC NORTHWEST MESIC FOREST ECOSYSTEM: HYPOTHESIS TESTING WITHIN A COMPARATIVE PHYLOGEOGRAPHIC FRAMEWORK

Evolution ◽  
2005 ◽  
Vol 59 (8) ◽  
pp. 1639-1652 ◽  
Author(s):  
Brayan C. Cartens ◽  
Steven J. Brunsfeld ◽  
John R. Demboski ◽  
Jeffrey M. Good ◽  
Jack Sullivan
Keyword(s):  
Hypothesis Testing ◽  
Pacific Northwest ◽  
Forest Ecosystem ◽  
Evolutionary History ◽  
Mesic Forest ◽  
The Pacific ◽  
History Of

scholarly journals The Origin and Evolution of Pacific Island Biotas, New Guinea to Eastern Polynesia: Patterns and Processes

1997 ◽  
Vol 3 (4) ◽  
pp. 408
Author(s):  
Jonathan D. Majer
Keyword(s):  
Cultural History ◽  
Hot Spot ◽  
New Guinea ◽  
Origin And Evolution ◽  
The Pacific ◽  
History Of ◽  
Number Of Publications ◽  
Patterns And Processes ◽  
The Relationship ◽  
The Tropical Pacific

A number of publications have considered the biogeography of various subsets of the Pacific Region, including the earlier works by J. L. Gressitt (Pacific Basin Biogeography) and by F. J. Radovsky and others (Biogeography of the Tropical Pacific). In addition to these, substantial edited volumes have been produced on the Biogeography and Ecology of New Guinea (by J. L. Gressitt), on Biogeography and Ecology in Australia (by A. Keast), on the relationship between these two regions in Bridge and Barrier: The Natural and Cultural History of the Torres Strait (by D. Walker) and on Hawaiian Biogeography: Evolution of a Hot Spot Archipelago (by W. L. Wagner and V. A. Funk). A substantial list of papers, reviews and symposia also pertain to the biogeography of this region.

scholarly journals Survey of Corylus Resistance to Anisogramma anomala from Different Geographic Locations

HortScience ◽  
2010 ◽  
Vol 45 (5) ◽  
pp. 832-836 ◽  
Author(s):  
Thomas J. Molnar ◽  
Joseph C. Goffreda ◽  
C. Reed Funk
Keyword(s):  
Genetic Diversity ◽  
Pacific Northwest ◽  
Host Resistance ◽  
Native Range ◽  
Geographic Locations ◽  
Pathogenic Variation ◽  
The Pacific ◽  
Complete Resistance ◽  
Anisogramma Anomala ◽  
History Of

Anisogramma anomala (Peck) E. Müller is the causal agent of the disease eastern filbert blight (EFB) of hazelnuts (Corylus spp.). Little is known of its genetic diversity and pathogenic variation. Most sources of host resistance have been identified in the Pacific Northwest, a region outside the native range of A. anomala believed to have limited diversity of the fungus due to a long history of quarantine and its relatively recent inadvertent introduction. In an attempt to investigate the pathogenic variation of A. anomala, 12 hazelnut genotypes that showed complete resistance in Oregon were inoculated with 12 isolates collected from across its native range. At the conclusion of the study, ‘Grand Traverse,’ ‘Ratoli’, OSU 541.147, OSU 495.072, and OSU 526.041 remained free of disease. ‘Closca Molla’, OSU 759.007, and OSU 587.044 were infected by most isolates. ‘Gasaway’ was infected by the Michigan isolate, which was also the only one to infect its offspring ‘Zimmerman’, although the lesion lacked sporulating stromata. Interestingly, ‘VR20–11’, another offspring of ‘Gasaway’, was infected by isolates from New Jersey, Minnesota, and Michigan. The Michigan isolate also caused the only signs of infection on OSU 408.040.

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