scholarly journals Species and assemblage responses of carabidae (coleoptera) to forest harvesting: contrasting clearcut and patch retention removals in high-elevation forests of central British Columbia

1998 ◽  
Author(s):  
Jeffery P. Lemieux
Keyword(s):  
British Columbia ◽  
High Elevation ◽  
Forest Harvesting ◽  
High Elevation Forests

Decomposition of hair lichens (Alectoria Sarmentosa and Bryoria spp.) Under Snowpack in Montane Forest, Cariboo Mountains, British Columbia

2002 ◽  
Vol 34 (5) ◽  
pp. 395-402 ◽  
Author(s):  
Darwyn S. Coxson ◽  
Medea Curteanu
Keyword(s):  
British Columbia ◽  
Nutrient Dynamics ◽  
High Elevation ◽  
Late Winter ◽  
Litter Bags ◽  
Winter Storms ◽  
Mountain Ranges ◽  
Decomposition Processes ◽  
Alectoria Sarmentosa ◽  
High Elevation Forests

AbstractMontane old-growth forests on the windward slopes of interior mountain ranges in British Columbia support high loadings of arboreal lichens. These lichens represent a major source of readily labile plant material and potentially play an important role in ecosystem nutrient dynamics. Given the role of winter storms in scouring lichens from within the canopy and the extended length of winter snowpack, from November through to May or even early June, in these ecosystems, the decomposition of lichen litterfall should be heavily influenced by placement within the snowpack. We have examined this factor by placing litter bags containing samples of the hair lichens, Alectoria sarmentosa and Bryoria spp., on top of the winter snowpack in the Cariboo Mountains. Samples were set out in early- (8 Nov.) mid- (16 Jan.) and late- (22 Mar.) winter and subsequently retrieved on spring snow-melt (22 May). Lichen samples that were buried in the lower snowpack all winter long (196 days) lost two-thirds of their original mass. In contrast lichens placed on the snowpack in mid- (127 days) or late-winter (61 days) lost only 6-15% of their total mass, far less than would be predicted on the basis of time in snowpack alone. Spot measurements showed that the snowpack environment effectively buffers litter samples from extreme winter conditions. All lichen samples placed within the snowpack showed much higher C/N ratios on removal, indicating rapid leaching of readily soluble cellular constituents in the snowpack environment. These findings indicate that the snowpack environment plays a major role in decomposition processes in these high-elevation forests and reinforces our view that lichens are a readily labile nutrient source within these ecosystems.

scholarly journals Ecological variability of high elevation forests in central British Columbia

2003 ◽  
Vol 79 (2) ◽  
pp. 259-262 ◽  
Author(s):  
Craig DeLong ◽  
Del Meidinger
Keyword(s):  
British Columbia ◽  
Management Practices ◽  
Natural Disturbance ◽  
High Elevation ◽  
Forest Composition ◽  
Subalpine Fir ◽  
Disturbance Dynamics ◽  
Ecological Variability ◽  
Engelmann Spruce ◽  
High Elevation Forests

High-elevation, late-successional forests over much of British Columbia are dominated by Engelmann spruce (Picea engelmannii Parry ex. Engelm.) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.). Throughout the range of these forests, however, there is a wide variation in natural disturbance and successional dynamics as influenced by diverse climate and topography. We divided these high elevation forests into four groups arranged along a regional climatic gradient that affects forest composition, structure and disturbance regime. For each, we describe the climate, topography, major vegetation, and natural disturbance dynamics. We suggest that management practices reflect the ecological variability demonstrated for these high elevation forests. Key words: high elevation forests, ecological variability, natural disturbance dynamics, vegetation, Engelmann spruce, subalpine fir, British Columbia, climate, topography

Lecidea hercynica, a new montane epiphytic lichen from Germany

2005 ◽  
Vol 37 (6) ◽  
pp. 485-489 ◽  
Author(s):  
Michaela SCHMULL ◽  
Markus HAUCK
Keyword(s):  
New Species ◽  
Picea Abies ◽  
High Elevation ◽  
Harz Mountains ◽  
Epiphytic Lichen ◽  
Taxonomic Treatment ◽  
High Elevation Forests ◽  
A New Species

Lecidea hercynica Hauck & Schmull is described as a new species from Germany. It is characterized by a poorly developed or bullate to verrucose, areolate thallus on whitened spots of the substratum, numerous plane to yellowish brown to black, convex apothecia with a persistent margin, Micarea type-like asci, and by the presence of atranorin and protocetraric acid. It does not belong to Lecidea s. str., but is provisionally placed in Lecidea s. lat. until a taxonomic treatment of the whole group has been carried out. Lecidea hercynica is widespread in high-elevation forests of Picea abies in the Harz Mountains, where it grows preferably on decorticated wood in open situations.

Revision of the Venezuelan spider genus Stenosfemuraia González-Sponga, with new generic and specific synonymies (Araneae, Pholcidae)

Zootaxa ◽  
2017 ◽  
Vol 4341 (4) ◽  
pp. 495
Author(s):  
BERNHARD A. HUBER ◽  
QUINTIN C. ARIAS
Keyword(s):  
Type Species ◽  
High Elevation ◽  
High Elevation Forests

The Venezuelan genus Stenosfemuraia González-Sponga, 1998 is revised, with redescriptions of its three named species: S. parva González-Sponga, 1998 (type species); S. cuadrata González-Sponga, 2005; and S. pilosa (González-Sponga, 2005) n. comb. The latter species was originally described as Codazziella pilosa, and six years later again as Chichiriviche costanero González-Sponga, 2011 (n. syn.). The monotypic genera Codazziella González-Sponga, 2005 and Chichiriviche González-Sponga, 2011 are thus newly synonymized with Stenosfemuraia. The genus appears restricted to the Cordillera de la Costa region where the spiders occupy near-ground microhabitats in medium to high elevation forests. 

Cultural Forests in Cross Section: Clear-Cuts Reveal 1,100 Years of Bark Harvesting on Vancouver Island, British Columbia

2019 ◽  
Vol 84 (3) ◽  
pp. 516-530 ◽  
Author(s):  
Jacob K. Earnshaw
Keyword(s):  
British Columbia ◽  
Cross Section ◽  
Growth Ring ◽  
Vancouver Island ◽  
Forest Harvesting ◽  
Contact Period ◽  
Old Growth ◽  
Ancient Forest ◽  
Post Impact ◽  
Bark Peeling

Culturally modified trees (CMTs) provide tangible evidence of long-term forest use by Indigenous peoples. In Northwest Coast cedar forests, this record rarely spans beyond the last three centuries because older bark-harvest scars have been obscured through taphonomic processes such as natural healing and decay. Thus, archaeological visibility and identification are hindered. Here, I recover chronologies of ancient forest harvesting using a post-impact assessment methodology of targeting old-growth clear-cuts in southern Nuu-chah-nulth territories on the west coast of Vancouver Island, British Columbia, Canada. Bark-peeling scars are identified and dated in cross section by growth-ring patterns of recently logged trees. Approximately half of all bark-peeling scars are “embedded” inside healing lobes, suggesting at least half of all such CMTs are effectively invisible in standing forests. Features in these post-impact surveys predated those discovered in conventional archaeological impact assessments by a mean of almost a century. Additionally, one of the oldest continually used cultural forests ever recorded, dating to AD 908, is found in the Toquaht Nation traditional territory. These findings uncover measurable frequencies of cedar-bark harvesting generations prior to the contact period and reveal the inadequacy of heritage protections for old-growth cedar stands.

scholarly journals Seasonal Habitat Use and Movements of Mountain Goats, Oreamnos americanus, in East-central British Columbia

2003 ◽  
Vol 117 (4) ◽  
pp. 565 ◽  
Author(s):  
Kim G. Poole ◽  
Douglas C. Heard
Keyword(s):  
British Columbia ◽  
Adverse Effects ◽  
Home Range ◽  
Habitat Use ◽  
High Elevation ◽  
East Central ◽  
Oreamnos Americanus ◽  
Mountain Goats ◽  
Mineral Licks ◽  
Forest Use

To identify the potential for adverse effects of forest development on Mountain Goats (Oreamnos americanus), we documented the patterns of forest use by goats and the factors influencing goat habitat use. We used a combination of 15 very high frequency (VHF) and six global positioning system (GPS) radiocollars to document the distribution and movements of 21 (15 female, 6 male) goats from 1997 to 1999 in the mountains surrounding the Robson Valley in east-central British Columbia. Because canopy closure reduces the likelihood that a GPS receiver will obtain a location fix, we estimated that GPS collars underrepresented forest use by about 23%. Three goats used separate winter and summer ranges separated by 8–13 km, while most simply exhibited seasonal shifts in elevation. In winter, goats were more often at lower elevations, in commercial forest stands, on southerly aspects, and moved less each hour and over the course of the winter. Goat use declined in areas >500 m from escape terrain and goats were found lower in elevation from evening to dawn compared to daylight hours. Collared goats used high elevation licks, which were either within their home range, or in two cases, 6 and 14 km from their typical home range. We documented use of known mid-elevation mineral licks by three collared goats, but no use of known low elevation (valley bottom and lower slopes) mineral licks. Robson Valley goats appeared to be at relatively low risk from disturbances related to logging, because although forest use was documented during winter, it occurred primarily on high elevation, steep slopes where trees are currently of low commercial value, and goats made little use of low elevation mineral licks. We recommend that in this area a forested buffer of 500 m around cliffs be left to reduce the possibility of adverse effects on goats especially, on southerly aspects above 1300 m.

Sign in / Sign up

Export Citation Format

Share Document