Vegetation of the Siskiyou Mountains, Oregon and California

1960 ◽  
Vol 30 (3) ◽  
pp. 279-338 ◽  
Author(s):  
R. H. Whittaker
Keyword(s):  
Siskiyou Mountains

Vegetation of the Siskiyou Mountains, Oregon and California

1960 ◽  
Vol 30 (4) ◽  
pp. 407-407 ◽  
Author(s):  
R. H. Whittaker
Keyword(s):  
Siskiyou Mountains

Strategies for Modeling Habitat Relationships of Uncommon Species: An Example Using the Siskiyou Mountains Salamander (Plethodon stormi)

2007 ◽  
Vol 81 (1) ◽  
pp. 15-36 ◽  
Author(s):  
Hartwell H. Welsh ◽  
Howard Stauffer ◽  
David R. Clayton ◽  
Lisa M. Ollivier
Keyword(s):  
Siskiyou Mountains

scholarly journals Susceptibility of Conifers to Three Dwarf Mistletoes in the Klamath-Siskiyou Mountains

2011 ◽  
Vol 26 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Robert Mathiasen
Keyword(s):  
Host Susceptibility ◽  
Mixed Conifer ◽  
White Pine ◽  
Dwarf Mistletoe ◽  
Susceptibility Data ◽  
Mixed Conifer Forests ◽  
Western White Pine ◽  
Siskiyou Mountains ◽  
Study Sites ◽  
Live Tree

Abstract Dwarf mistletoes (Arceuthobium spp., Viscaceae) are parasitic flowering plants that infect members of the Pinaceae family in the western United States. This article reports additional host susceptibility data for three dwarf mistletoes found in the Klamath-Siskiyou Mountains of southwestern Oregon and northwestern California. Three mixed conifer stands, each infested with either mountain hemlock dwarf mistletoe, western white pine dwarf mistletoe, or Wiens' dwarf mistletoe (nine stands total) were sampled to evaluate the susceptibility of conifers to these parasites. At each of the study sites, 10–20 temporary circular plots with a 6-m radius (0.012 ha) were established around large, severely infected trees. Within plots, species, dbh, and dwarf mistletoe rating (six-class system) were determined for each live tree. On the basis of the incidence of infection, conifers were assigned to host susceptibility classes. Western white pine and mountain hemlock were principal hosts of western white pine and mountain hemlock dwarf mistletoes, respectively. Brewer spruce and red fir were principal hosts of Wiens' dwarf mistletoe. Other conifers sampled were less susceptible to these mistletoes. This information can be used by forest managers to mitigate the damage associated with infestations of these dwarf mistletoes in mixed conifer forests of the Klamath-Siskiyou Mountains.

scholarly journals A Resurrection for Siskiyou bells, Prosartes parvifolia (Liliaceae), a Rare Siskiyou Mountains Endemic

Madroño ◽  
2010 ◽  
Vol 57 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Michael Mesler ◽  
Robin Bencie ◽  
Bianca Hayashi
Keyword(s):  
Siskiyou Mountains

Postglacial vegetation, fire, and climate history of the Siskiyou Mountains, Oregon, USA

2005 ◽  
Vol 64 (1) ◽  
pp. 44-56 ◽  
Author(s):  
Christy E. Briles ◽  
Cathy Whitlock ◽  
Patrick J. Bartlein
Keyword(s):  
Environmental History ◽  
Fire Regime ◽  
Regional Scale ◽  
Natural Disturbance ◽  
High Elevation ◽  
Early Holocene ◽  
Climate History ◽  
Fire Activity ◽  
History Of ◽  
Siskiyou Mountains

AbstractThe forests of the Siskiyou Mountains are among the most diverse in North America, yet the long-term relationship among climate, diversity, and natural disturbance is not well known. Pollen, plant macrofossils, and high-resolution charcoal data from Bolan Lake, Oregon, were analyzed to reconstruct a 17,000-yr-long environmental history of high-elevation forests in the region. In the late-glacial period, the presence of a subalpine parkland of Artemisia, Poaceae, Pinus, and Tsuga with infrequent fires suggests cool dry conditions. After 14,500 cal yr B.P., a closed forest of Abies, Pseudotsuga, Tsuga, and Alnus rubra with more frequent fires developed which indicates more mesic conditions than before. An open woodland of Pinus, Quercus, and Cupressaceae, with higher fire activity than before, characterized the early Holocene and implies warmer and drier conditions than at present. In the late Holocene, Abies and Picea were more prevalent in the forest, suggesting a return to cool wet conditions, although fire-episode frequency remained relatively high. The modern forest of Abies and Pseudotsuga and the present-day fire regime developed ca. 2100 cal yr B.P. and indicates that conditions had become slightly drier than before. Sub-millennial-scale fluctuations in vegetation and fire activity suggest climatic variations during the Younger Dryas interval and within the early Holocene period. The timing of vegetation changes in the Bolan Lake record is similar to that of other sites in the Pacific Northwest and Klamath region, and indicates that local vegetation communities were responding to regional-scale climate changes. The record implies that climate-driven millennial- to centennial-scale vegetation and fire change should be considered when explaining the high floristic diversity observed at present in the Siskiyou Mountains.

scholarly journals Effects of post-fire logging on forest surface air temperatures in the Siskiyou Mountains, Oregon, USA

2010 ◽  
Vol 83 (5) ◽  
pp. 477-482 ◽  
Author(s):  
J. B. Fontaine ◽  
D. C. Donato ◽  
J. L. Campbell ◽  
J. G. Martin ◽  
B. E. Law
Keyword(s):  
Air Temperatures ◽  
Siskiyou Mountains
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