Ectomycorrhizae of Douglas-fir and western hemlock seedlings outplanted on eastern Vancouver Island

1992 ◽  
Vol 22 (11) ◽  
pp. 1646-1655 ◽  
Author(s):  
A.L. Roth ◽  
S.M. Berch
Keyword(s):  
British Columbia ◽  
Ectomycorrhizal Fungi ◽  
Growing Season ◽  
Vancouver Island ◽  
Douglas Fir ◽  
Field Conditions ◽  
Single Site ◽  
Western Hemlock ◽  
Field Season ◽  
Ectomycorrhizal Colonization

Ectomycorrhizal colonization of container-grown Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) and western hemlock (Tsugaheterophylla (Raf.) Sarg.) seedlings was determined in a container nursery near Nanaimo, British Columbia, and after one growing season under a range of field conditions on eastern Vancouver Island. The percentage of Douglas-fir and western hemlock short roots colonized by ectomycorrhizal fungi in the nursery was highly variable, but over 99% of the ectomycorrhizae were formed by Thelephoraterrestris Ehrh.:Fr. Between 72 and 93% of the new roots were ectomycorrhizal after one field season, and Thelephoraterrestris remained the dominant fungus in most cases. Rhizopogonvinicolor like ectomycorrhizae were also common on new roots of Douglas-fir. Cenococcumgeophilum Fr. was less common. Douglas-fir seedlings formed 33 morphologically distinct ectomycorrhizae on eight sites within one growing season in the field. Western hemlock formed nine types on a single site.

Ectomycorrhizae and growth of Douglas-fir seedlings preinoculated with Rhizopogonvinicolor and outplanted on eastern Vancouver Island

1993 ◽  
Vol 23 (8) ◽  
pp. 1711-1715 ◽  
Author(s):  
S.M. Berch ◽  
A.L. Roth
Keyword(s):  
Cold Storage ◽  
Growing Season ◽  
Vancouver Island ◽  
Douglas Fir ◽  
The Other ◽  
Field Soil ◽  
Field Season ◽  
Ectomycorrhizal Colonization ◽  
Growth Differences ◽  
And Control

Ectomycorrhizal colonization of container-grown Pseudotsugamenziesii (Mirb.) Franco (Douglas-fir) inoculated with Rhizopogonvinicolor A.H. Smith was determined after cold storage and after one growing season on a clearcut on eastern Vancouver Island. Inoculated Douglas-fir seedlings were taller than noninoculated controls when outplanted but, perhaps because of browse damage, no growth differences were found after one field season. Rhizopogonvinicolor colonized all of the inoculated but none of the control seedlings examined after cold storage. Volunteer Thelephoraterrestris Fr. colonized almost half of the control and 10% of the inoculated seedlings before outplanting. After one field season, inoculated and control seedlings were colonized by 15 ectomycorrhizal fungi each, only eight of which were found on both. Rhizopogonvinicolor persisted on the roots of inoculated plants, but was also present in the field soil since the control seedlings also bore these mycorrhizae after one growing season. The relative abundance of T. terrestris decreased from the nursery to the field. The other common ectomycorrhizae in the field included Myceliumradicisatrovirens Melin, Cenococcumgeophilum Fr., and types resembling Tuber and Endogone.

scholarly journals Mapping the environmental limitations to growth of coastal Douglas-fir stands on Vancouver Island, British Columbia

2007 ◽  
Vol 27 (6) ◽  
pp. 805-815 ◽  
Author(s):  
N. C. Coops ◽  
S. B. Coggins ◽  
W. A. Kurz
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
Douglas Fir

Snag longevity of Douglas-fir, western hemlock, and western redcedar from permanent sample plots in coastal British Columbia

2010 ◽  
Vol 259 (3) ◽  
pp. 633-640 ◽  
Author(s):  
Roberta Parish ◽  
Joseph A. Antos ◽  
Peter K. Ott ◽  
C. Mario Di Lucca
Keyword(s):  
British Columbia ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Western Redcedar ◽  
Permanent Sample Plots ◽  
Coastal British Columbia

Palynology and paleoecology of postglacial sediments in an anoxic basin, Saanich Inlet, British Columbia

1983 ◽  
Vol 20 (5) ◽  
pp. 873-885 ◽  
Author(s):  
Linda E. Heusser
Keyword(s):  
British Columbia ◽  
Pinus Contorta ◽  
Tsuga Heterophylla ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Thuja Plicata ◽  
Alnus Rubra ◽  
Red Cedar ◽  
Saanich Inlet ◽  
Anoxic Basin

Varved, black clayey silts deposited in the marine waters of Saanich Inlet yield unusually abundant and diverse pollen assemblages derived from the coastal Douglas-fir (Pseudotsuga) and western hemlock (Tsuga heterophylla) forests of southwestern British Columbia. The 12 000 year palynological record chronicles the development of vegetation since ice left Saanich Inlet: the succession of pine (Pinus contorta) and alder (Alnus rubra) woodlands by forests characterized by Douglas-fir and oak (Quercus) and later by western hemlock and red cedar (Thuja plicata). Rapid deposition of annual layers of pollen, charcoal, and other terrigenous particles provides detailed evidence of changes in land use during the past few hundred years: settlement, logging, farming, and urbanization. Vegetational and climatic changes inferred from pollen spectra in the marine sediments of Saanich Inlet compare favorably with changes inferred from correlative pollen assemblages previously described from adjacent parts of Vancouver Island and the Fraser River valley.

Root Grafts and their Silvicultural Implications

1972 ◽  
Vol 2 (2) ◽  
pp. 111-120 ◽  
Author(s):  
S. Eis
Keyword(s):  
Root System ◽  
Vancouver Island ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Slow Recovery ◽  
Red Cedar ◽  
Western Red Cedar ◽  
Root Grafts

Many trees in stands of Douglas fir, western hemlock and western red cedar on Vancouver Island were joined by functional grafts. In a partially cut stand, 45% of the stumps showed evidence of continued growth and half of these (23%) were still growing vigorously more than 22 years after logging. On experimentally detopped trees, growth extended several meters up the bole. Dominant trees usually supported the growth of the root system and lower boles of grafted suppressed trees.Translocation through grafts may partially explain the frequent stagnation and slow recovery of stands after thinning from above, and may be involved in the usually rapid increase of growth after thinning from below. It is probably a contributing factor in establishing dominance and determining mortality in overtopped trees. In species that graft freely, the use of silvicides in spacing and thinning treatments should be restricted to young stands before grafts are established.

Variation in climate-growth relationships for Douglas-fir growth across spatial and temporal scales on southern Vancouver Island, British Columbia

2019 ◽  
Vol 444 ◽  
pp. 30-41
Author(s):  
Hardy P. Griesbauer ◽  
Heather Klassen ◽  
Sari C. Saunders ◽  
David L. Spittlehouse
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
Douglas Fir ◽  
Temporal Scales ◽  
Spatial And Temporal Scales

SEASONAL VARIATIONS IN RADIAL GROWTH AT BREAST HEIGHT OF SOME WESTERN HEMLOCK AND DOUGLAS FIR TREES, 1953-57

1960 ◽  
Vol 36 (4) ◽  
pp. 391-400 ◽  
Author(s):  
Braham G. Griffith
Keyword(s):  
Average Length ◽  
Basal Area ◽  
Growing Season ◽  
Average Diameter ◽  
Frost Damage ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Radial Increment ◽  
Breast Height ◽  
Total Growth

Radial increment was recorded at weekly intervals for 68 Douglas fir and 14 western hemlock trees throughout the growing season for the years 1953-57 inclusive. The average diameter, inside bark at breast height, was 13.9 inches for the Douglas firs and 11.9 inches for the western hemlock. Growth for both species generally commenced during the first week of May. The average length of the growing season for Douglas fir was 146 days and for western hemlock 156 days. Douglas fir completed a greater percentage of its total growth earlier in the season than did western hemlock, accounting for an average of 83 per cent of its basal area growth by July 31 compared to 68 per cent for western hemlock. Growth in both 1956 and 1957 was considerably below that of each of the preceding three years. This was attributed partly to the severe frost damage to the trees in November 1955.

Long-term response of understory plant species to thinning and fertilization in a Douglas-fir plantation on southern Vancouver Island, British Columbia

2000 ◽  
Vol 30 (4) ◽  
pp. 566-572 ◽  
Author(s):  
Fangliang He ◽  
Hugh J Barclay
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
N Fertilization ◽  
Douglas Fir ◽  
Understory Vegetation ◽  
Marginal Effect ◽  
Specific Substrate ◽  
Significant Treatment ◽  
Commercial Thinning ◽  
Canopy Trees

The 27-year response of understory vegetation in a 51-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forest to thinning and N fertilization treatments was examined in a silviculture experiment at Shawnigan Lake on southern Vancouver Island of British Columbia. The experiment was a two-way factorial design with three levels for each of thinning and N fertilization. No significant treatment effects on the number of either vascular or nonvascular species were detected. This was also true for the covers of the majority of understory species except salal (Gaultheria shallon Pursh) and Oregon beaked moss (Kindbergia oregana (Sull.) Ochyra). Heavy thinning led to high salal and Oregon beaked moss cover, whereas heavy fertilization resulted in lower cover of salal but had no effect on the cover of Oregon beaked moss. Although thinning had a marginal effect on the cover of canopy trees 27 years after treatment, the cover of the canopy trees had only minimal effects on understory vegetation. Conversely, no adverse effect of understory vegetation on canopy trees was found. This study suggested that after 27 years thinning and fertilization had little effect on understory vegetation whether in terms of species richness or vegetation cover. An effective way to conserve species diversity is to protect specific substrate types, e.g., tree trunks, stumps, and coarse woody debris. A commercial thinning was recommended to reduce the time of stem exclusion in similar type of forests.

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