Subalpine meadow vegetation of south central Vancouver Island

1986 ◽  
Vol 64 (4) ◽  
pp. 815-821 ◽  
Author(s):  
Robert J. Milko ◽  
M. A. M. Bell
Keyword(s):  
Pacific Northwest ◽  
Plant Communities ◽  
Vancouver Island ◽  
High Elevation ◽  
Pteridium Aquilinum ◽  
South Central ◽  
Olympic Mountains ◽  
Subalpine Meadow ◽  
The Pacific ◽  
Community Types

The subalpine meadow vegetation at three sites in the south central mountains of Vancouver Island was described. Based on dominance, six plant community types were delimited by ordination and classification. The community types are Phlox–moss, Anaphalis–Aster, Ribes–Heuchera, Pteridium aquilinum, Senecio–Veratrum, and Vaccinium–Carex. Although the two low-elevation sites were floristically similar, community definition was sharply delineated at Haley Lake but more continuous at Bell Creek. In contrast, the high-elevation Gemini Peak site was floristically and compositionally different and showed a more advanced stage of succession towards forest-dominated communities. Comparisons of the plant communities with those described for other subalpine regions of the Pacific Northwest indicated the strongest similarity to the vegetation of the Olympic Mountains, Washington.

scholarly journals Comparison of Coastal Fringe and Interior Forests as Reserves for Marbled Murrelets on Vancouver Island

The Condor ◽  
2000 ◽  
Vol 102 (4) ◽  
pp. 915-920
Author(s):  
Alan E. Burger ◽  
Volker Bahn ◽  
Angeline R. M. Tillmanns
Keyword(s):  
Pacific Northwest ◽  
Structural Diversity ◽  
Vancouver Island ◽  
Old Growth ◽  
Brachyramphus Marmoratus ◽  
Marbled Murrelet ◽  
The Pacific ◽  
Using Data ◽  
Associated Species ◽  
Marbled Murrelets

Abstract Much of the protected habitat available to the threatened Marbled Murrelet Brachyramphus marmoratus and other old-growth associated species in the Pacific Northwest is in narrow strips along the coast (e.g., parks and scenic fringes). Using data over two years from three watersheds on southwest Vancouver Island, we show that such shoreline strip forests represent suboptimal habitat for murrelets. Murrelet detections, including circling and subcanopy behaviors, were significantly lower at 30 coastal stations (20–250 m from the shoreline edge) than at 30 interior stations (1.5–21.0 km inland). Densities of predators were significantly higher at the coastal stations. The coastal trees were of similar mean height and diameter, but they had lower structural diversity and provided fewer and less suitable (thinner epiphyte cover on large boughs) nesting platforms than trees in the interior. When possible, reserves for Marbled Murrelets should be placed in interior and not shoreline forests.

Precipitation chemistry and deposition at a high-elevation site in the Pacific Northwest United States (1989–2015)

2019 ◽  
Vol 212 ◽  
pp. 221-230 ◽  
Author(s):  
Anne M. Johansen ◽  
Clint Duncan ◽  
Ashleen Reddy ◽  
Naomi Swain ◽  
Mari Sorey ◽  
...  
Keyword(s):  
United States ◽  
Pacific Northwest ◽  
Precipitation Chemistry ◽  
High Elevation ◽  
High Elevation Site ◽  
The Pacific

Morphological variation and taxonomy of chromosomally differentiated Peromyscus from the Pacific Northwest

1988 ◽  
Vol 66 (12) ◽  
pp. 2734-2739 ◽  
Author(s):  
Marc W. Allard ◽  
Ira F. Greenbaum
Keyword(s):  
Pacific Northwest ◽  
Morphological Variation ◽  
Deer Mouse ◽  
Geographic Area ◽  
Morphological Characters ◽  
Vancouver Island ◽  
Deer Mice ◽  
Strait Of Georgia ◽  
Fundamental Number ◽  
The Pacific

Analysis of 28 morphological characters supports the existence of two karyotypically defined species of Peromyscus on Vancouver Island and islands in the Queen Charlotte Strait and the Strait of Georgia. Morphology of insular and mainland populations from Washington and British Columbia is congruent with karyotypic data indicating that only the smaller, low fundamental number deer mice should be retained with Peromyscus maniculatus, and that the larger, high fundamental number forms should be referred to Peromyscus areas. Accordingly, P. maniculatus ranges throughout Vancouver Island, is the only deer mouse inhabiting the islands of the Strait of Georgia, and occurs on some of the more northern small islands. Insular forms of P. areas occur on northern and western Vancouver Island and on the islands in the Queen Charlotte Strait. The existence of two species in this geographic area indicates the need for a revision of the subspecific taxonomy. From the patterns of morphological variation among the examined populations of karyotypically characterized individuals, we offer hypotheses that should be tested in the development of formal intraspecific taxonomic decisions.

Contrasting Climatic Histories for the Snake River Plain, Idaho, Resulting from Multiple Thermal Maxima

1986 ◽  
Vol 26 (3) ◽  
pp. 321-339 ◽  
Author(s):  
Owen K. Davis ◽  
John C. Sheppard ◽  
Susan Robertson
Keyword(s):  
Pacific Northwest ◽  
Late Quaternary ◽  
High Elevation ◽  
Snake River Plain ◽  
Early Holocene ◽  
Snake River ◽  
Limiting Factor ◽  
Summer Drought ◽  
The Pacific ◽  
River Plain

Ten sites near the Snake River Plain have consistent differences in their climatic histories. Sites at low elevation reflect the “early Holocene xerothermic” of the Pacific Northwest, whereas most climatic chronologies at high elevation indicate maximum warmth or aridity somewhat later, ca. 6000 yr ago. This elevational contrast in climatic histories is duplicated at three sites from the central Snake River Plain. For sites in such close proximity, the different chronologies cannot be explained by changes in atmospheric circulation during the late Quaternary. Rather, the differences are best explained by the autecology of the plants involved and the changing seasonal climate. The seasonal climatic sequence predicted by multiple thermal maxima explains the high- and low-elevation chronologies. During the early Holocene, maximum insolation and intensified summer drought in July forced low-elevation vegetation upward. However, moisture was not a limiting factor at high elevation, where vegetation moved upward in response to increased length of growing season coincident with maximum September insolation 6000 yr ago.

Hydrographic Charting and Oceanography on the West Coast of Canada from the Eighteenth Century to the Present Day

1972 ◽  
Vol 73 ◽  
pp. 75-83
Author(s):  
Robert W. Sandilands
Keyword(s):  
British Columbia ◽  
Eighteenth Century ◽  
Pacific Northwest ◽  
West Coast ◽  
Vancouver Island ◽  
The West ◽  
Special Place ◽  
The Pacific ◽  
Short Period ◽  
Formative Years

Those participating in this Congress are aware of the leadership of Rear-Admiral George Henry Richards in mounting the Challenger Expedition, which he himself regarded as the crowning achievement of his career. However, he also has a very special place in the history and development of British Columbia and it can fairly be said that his work in the Pacific Northwest was the major achievement of his sea-going career. His service on the coast covered the short period 1857 to 1863, but these were formative years in the development of the west coast colonies of Vancouver Island and British Columbia.

Influence of landscape on resident and anadromous life history types of Oncorhynchus mykiss

2008 ◽  
Vol 65 (6) ◽  
pp. 1013-1023 ◽  
Author(s):  
Shawn R. Narum ◽  
Joseph S. Zendt ◽  
David Graves ◽  
William R. Sharp
Keyword(s):  
Life History ◽  
Oncorhynchus Mykiss ◽  
Pacific Northwest ◽  
Isolation By Distance ◽  
High Elevation ◽  
Steelhead Trout ◽  
Mantel Tests ◽  
Lower Elevation ◽  
The Pacific ◽  
High Gradients

Landscape features can significantly influence genetic and life history diversity of rainbow/steelhead trout, Oncorhynchus mykiss . In this study, heterozygosity of 21 populations of O. mykiss from the Pacific Northwest, USA, was significantly negatively correlated with features such as elevation (P = 0.0023), upstream distance (P = 0.0129), and precipitation (P = 0.0331), and positively correlated with temperature (P = 0.0123). Mantel tests of isolation by distance were significant for anadromous populations (P = 0.007) but not for resident collections (P = 0.061), and suggested that fluvial distance was not the only significant physical variable that influenced genetic structure of life history types. Principal components interpolated to the drainage indicated that high-elevation sites were primarily occupied by the resident form, and high gradients and barriers act to limit anadromous distribution to lower elevation sites. These patterns of O. mykiss life history diversity provide insight regarding the interaction, distribution, and limitations of resident and anadromous forms of the species within this region.

scholarly journals Morphology and Population Characteristics of Vancouver Island Cougars, Puma concolor vancouverensis

2004 ◽  
Vol 118 (2) ◽  
pp. 159
Author(s):  
Steven F. Wilson ◽  
Apryl Hahn ◽  
Aaron Gladders ◽  
Karen M. L. Goh ◽  
David M. Shackleton
Keyword(s):  
Body Size ◽  
Pacific Northwest ◽  
Puma Concolor ◽  
Survival Rates ◽  
Vancouver Island ◽  
Population Characteristics ◽  
Top Predator ◽  
Adult Females ◽  
The Pacific ◽  
Age And Sex

Cougars are a management concern on Vancouver Island because they are a top predator and because there have been frequent attacks on humans on the island. However, little is known about Cougar ecology in the Pacific Northwest of North America. We studied Cougar morphology and population characteristics as part of a larger study in two areas on Vancouver Island. We derived a multivariate measure of body size to describe changes with age and sex. Body size was similar in the two study areas. Survival rates for adult females were higher than those reported elsewhere; however, hunters avoided shooting females in general, and radio-collared Cougars in particular. Litter size at first detection was lower than reported in many other studies and may be related to food availability.Includes erratum for a figure in this article.

Eocene Ginkgo leaf fossils from the Pacific Northwest

2002 ◽  
Vol 80 (10) ◽  
pp. 1078-1087 ◽  
Author(s):  
George E Mustoe
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Ginkgo Biloba ◽  
Middle Eocene ◽  
Washington State ◽  
North Central ◽  
Lacustrine Deposits ◽  
South Central ◽  
The Pacific ◽  
Ginkgo Leaf

Middle Eocene lacustrine deposits in south-central British Columbia and north-central Washington state preserve two types of Ginkgo leaves. A morphotype characterized by deeply divided multiple lobes is herein described as Ginkgo dissecta sp.nov. Leaves that are either undivided or shallowly divided into bilobate symmetry are indistinguishable from foliage of extant Ginkgo biloba Linnaeus. These fossils contradict the widely held belief that only a single Ginkgo species, Ginkgo adiantoides (Unger) Heer, inhabited Cenozoic forests.Key words: British Columbia, Eocene, fossil, Ginkgo adiantoides, Ginkgo biloba, Ginkgo dissecta, McAbee, Republic, Tertiary, Washington.

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