Subalpine Cover Associations of Eutamias amoenus and Eutamias townsendii in the Washington Cascades

1972 ◽  
Vol 88 (2) ◽  
pp. 348
Author(s):  
Don H. Meredith
Keyword(s):  
Washington Cascades

OLIVINE CHEMISTRY OF INDIAN HEAVEN LAVAS, SOUTHERN WASHINGTON CASCADES

2018 ◽  
Author(s):  
Bethany G. Rysak ◽  
◽  
Diane R. Smith ◽  
Kurt Knesel
Keyword(s):  
Washington Cascades

scholarly journals Influence of Niche Overlap and Territoriality on Hybridization Between Hermit Warblers and Townsend's Warblers

The Auk ◽  
2000 ◽  
Vol 117 (1) ◽  
pp. 175-183 ◽  
Author(s):  
Scott F. Pearson ◽  
David A. Manuwal
Keyword(s):  
Habitat Use ◽  
Hybrid Zone ◽  
Parental Species ◽  
Niche Overlap ◽  
Habitat Characteristics ◽  
Hybrid Zones ◽  
Parental Fitness ◽  
Habitat Transition ◽  
Habitat Variables ◽  
Washington Cascades

Abstract Hybrid zones between Townsend's Warblers (Dendroica townsendi) and Hermit Warblers (D. occidentalis) in the Pacific Northwest are narrow relative to estimated dispersal distances and appear to be moving, with Townsend's replacing Hermits. We examined whether the habitat-transition and parental-fitness asymmetry models can explain why these zones are narrow and moving by comparing habitat variables associated with warbler territories in the Washington Cascades hybrid zone. Habitat variables did not differ among phenotypes, suggesting that the habitat-transition model cannot explain the narrow and dynamic nature of this hybrid zone. Habitat characteristics of Hermit Warbler territories did not differ inside versus outside the hybrid zone, also suggesting that this zone is not associated with a region of habitat transition. The lack of difference in habitat use could be the result of comparing variables that are not important to pairing success. However, warblers tended to select territories on west-southwest aspects. South aspects in the southern Washington Cascades are dominated by Douglas fir (Pseudotsuga menziesii) and true fir, which is a habitat selected by female warblers when choosing among territories and males. The parental-fitness asymmetry model does not necessarily make predictions about habitat use within the hybrid zone but predicts the superiority of one parental species over the other. However, if significant overlap occurs in habitat use or niche (as in these warblers), then competition between parental species is likely to occur. To determine whether these species compete, we mapped 12 warbler territories and monitored an additional 94 territories throughout the breeding season and found that all males with neighbors compete for and hold exclusive territories. Thus, the pattern of habitat use and territoriality is consistent with the parental-fitness asymmetry model.

Climatic control of denudation in the deglaciated landscape of the Washington Cascades

2011 ◽  
Vol 4 (7) ◽  
pp. 469-473 ◽  
Author(s):  
Seulgi Moon ◽  
C. Page Chamberlain ◽  
Kimberly Blisniuk ◽  
Nathaniel Levine ◽  
Dylan H. Rood ◽  
...  
Keyword(s):  
Climatic Control ◽  
Washington Cascades

Recent eruptions of Mount Adams, Washington Cascades, USA

1997 ◽  
Vol 58 (6) ◽  
pp. 472-490 ◽  
Author(s):  
Wes Hildreth ◽  
Judy Fierstein
Keyword(s):  
Mount Adams ◽  
Washington Cascades

Maintaining and Creating Old Growth Structural Features in Previously Disturbed Stands Typical of the Eastern Washington Cascades

1994 ◽  
Vol 2 (3-4) ◽  
pp. 353-387 ◽  
Author(s):  
C. D. Oliver ◽  
C. Harrington ◽  
M. Bickford ◽  
R. Gara ◽  
W. Knapp ◽  
...  
Keyword(s):  
Structural Features ◽  
Old Growth ◽  
Eastern Washington ◽  
Washington Cascades
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