Publications by J.M. Powell http://cfs.nrcan.gc.ca/authors/read/14098 Publications by J.M. Powell en-ca 2004-04-22 00:00:00 MST 2004-04-22 00:00:00 MST webmaster@nofc.cfs.nrcan.gc.ca Research on FMA lease of Weldwood at Hinton http://cfs.nrcan.gc.ca/publications?id=24312 Thu, 22 Apr 2004 http://cfs.nrcan.gc.ca/publications?id=24312 Impact of pine stem rusts of hard pines in Alberta and the Northwest Territories http://cfs.nrcan.gc.ca/publications?id=11781 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11781 Some climatic aspects of biomass productivity of white spruce stem wood http://cfs.nrcan.gc.ca/publications?id=11231 Biomass productivity was determined for white spruce (Piceaglauca (Moench) Voss) in the boreal forests of Alberta, the Northwest Territories, and Manitoba. Comparisons were made between southern and northern locations, between eastern and western transect locations, and between older (200 + years) and younger (110 years) trees. At 13 sampling locations, X-ray densitometric tree ring data were obtained from the base of the stem, breast height, and from five points equidistant along the stem. Markedly higher stem wood biomass productivity was found for the 110-year-old trees than for the 210-year-old trees in Alberta; average ring weights were 3.8 and 1.2 g for the first 100 years of growth in 1 cm thick disks at breast height. These results suggest that climatic warming since the end of the Little Ice Age (ca. 1850) has resulted in higher biomass productivity in the Canadian boreal forest. Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11231 Climatic variation and trends in the boreal forest region of western Canada http://cfs.nrcan.gc.ca/publications?id=11343 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11343 Botanical studies in the Lake Hazen Region, Northern Ellesmere Island, Northwest Territories, Canada. Publications in Natural Sciences number 5 http://cfs.nrcan.gc.ca/publications?id=24113 Thu, 19 Feb 2004 http://cfs.nrcan.gc.ca/publications?id=24113 Annual report to the Expert Committee on Agrometeorology http://cfs.nrcan.gc.ca/publications?id=32074 Fri, 21 Jan 2011 http://cfs.nrcan.gc.ca/publications?id=32074 Richmond Longley and climatic variability in Canada http://cfs.nrcan.gc.ca/publications?id=30059 Wed, 26 Aug 2009 http://cfs.nrcan.gc.ca/publications?id=30059 Richmond Longley and climatic variability in Canada: Climatic change in Canada 3 - Project on climatic change in Canada during the past 20,000 years http://cfs.nrcan.gc.ca/publications?id=19274 Wed, 30 Jan 2002 http://cfs.nrcan.gc.ca/publications?id=19274 Current climatological activity in Alberta: recent activities http://cfs.nrcan.gc.ca/publications?id=19275 Wed, 30 Jan 2002 http://cfs.nrcan.gc.ca/publications?id=19275 History and development of the Canadian climate program http://cfs.nrcan.gc.ca/publications?id=11310 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11310 Rodent and lagomorph damage to pine stem rusts, with special mention of studies in Alberta http://cfs.nrcan.gc.ca/publications?id=11309 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11309 Impact of climatic variation on boreal forest biomass production http://cfs.nrcan.gc.ca/publications?id=19303 Tue, 05 Feb 2002 http://cfs.nrcan.gc.ca/publications?id=19303 The Foothills http://cfs.nrcan.gc.ca/publications?id=19311 Wed, 06 Feb 2002 http://cfs.nrcan.gc.ca/publications?id=19311 Climate input to forestry courses at postsecondary institutions http://cfs.nrcan.gc.ca/publications?id=19312 Wed, 06 Feb 2002 http://cfs.nrcan.gc.ca/publications?id=19312 Northern Forest Research Centre http://cfs.nrcan.gc.ca/publications?id=19313 Wed, 06 Feb 2002 http://cfs.nrcan.gc.ca/publications?id=19313 Socioeconomic impacts of climate. Proceedings of the Workshop and Annual Meeting of the Alberta Climatological Association, March 2, 1979, University of Alberta, Edmonton, Alberta http://cfs.nrcan.gc.ca/publications?id=12025 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12025 Additional notes on the birds of the Kananaskis Forest Experiment Station and surrounding area http://cfs.nrcan.gc.ca/publications?id=23368 Tue, 25 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23368 Climatic classifications of the prairie provinces in Canada http://cfs.nrcan.gc.ca/publications?id=23391 Wed, 26 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23391 Hydrometeorology of the Hinton-Edson area, Alberta, 1972-1975 http://cfs.nrcan.gc.ca/publications?id=11774 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11774 Climatic networks: Proceedings of the Workshop and Annual Meeting sponsored by the Alberta Climatological Association, April 13, 1978, Edmonton, Alberta http://cfs.nrcan.gc.ca/publications?id=12023 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12023 Maps of selected climatic parameters for the prairie provinces, May to September, 1961-1970 http://cfs.nrcan.gc.ca/publications?id=12027 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12027 Applications of climatology: Proceedings of the Workshop and Annual Meeting Sponsored by the Alberta Climatological Committee, March 4, 1977, Northern Forest Research Centre, Edmonton, Alberta http://cfs.nrcan.gc.ca/publications?id=12026 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12026 A summer climate classification for the forested area of the prairie provinces using factor analysis http://cfs.nrcan.gc.ca/publications?id=12028 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12028 Pine stem rusts of Canada http://cfs.nrcan.gc.ca/publications?id=31796 Tue, 31 Aug 2010 http://cfs.nrcan.gc.ca/publications?id=31796 A directory of climate and related courses and persons interested in climatology in Alberta http://cfs.nrcan.gc.ca/publications?id=12024 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12024 Summer climate of the Hinton-Edson area, west-central Alberta, 1961-1970 http://cfs.nrcan.gc.ca/publications?id=12029 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12029 Climatic classifications of the prairie provinces: a new preliminary classification for the forested area of Alberta http://cfs.nrcan.gc.ca/publications?id=23455 Fri, 28 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23455 A factor analytic climatic classification of the forested areas of the prairie provinces http://cfs.nrcan.gc.ca/publications?id=23456 Fri, 28 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23456 Additional note on the incidence of Cronartium coleosporioides f. album on lodgepole pine http://cfs.nrcan.gc.ca/publications?id=23457 Fri, 28 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23457 An evaluation of mobile thermo dew-point recording in the Spring Creek basin, Alberta http://cfs.nrcan.gc.ca/publications?id=11920 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11920 Birds of the Kananaskis Forest Experiment Station and surrounding area: an annotated checklist http://cfs.nrcan.gc.ca/publications?id=12030 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12030 Arthropods from forest litter under lodgepole pine infected with the Comandra blister rust http://cfs.nrcan.gc.ca/publications?id=12031 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12031 The role of natural biological agents in controlling a pine stem rust (Cronartium comandrae) http://cfs.nrcan.gc.ca/publications?id=23576 Wed, 10 Dec 2003 http://cfs.nrcan.gc.ca/publications?id=23576 Environmental factors affecting germination of Cronartium comandrae aeciospores http://cfs.nrcan.gc.ca/publications?id=23577 Wed, 10 Dec 2003 http://cfs.nrcan.gc.ca/publications?id=23577 Some computer techniques for presentation of thermal infrared line scan data http://cfs.nrcan.gc.ca/publications?id=11919 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11919 Pinus mugo, a new host for comandra blister rust http://cfs.nrcan.gc.ca/publications?id=23659 Fri, 09 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23659 Serious damage caused by stalactiform bliste rust and western gall rust to a lodgepole pine plantation in central Alberta http://cfs.nrcan.gc.ca/publications?id=23660 Fri, 09 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23660 Thermal soil variations as a function of clearcut size: a preliminary analysis http://cfs.nrcan.gc.ca/publications?id=22875 Thu, 16 Oct 2003 http://cfs.nrcan.gc.ca/publications?id=22875 Insects collected from the toadflax, Comandra umbellata ssp. pallida (Santalaceae), infected by the rust, Cronartium comandrae, in southern Alberta http://cfs.nrcan.gc.ca/publications?id=23749 Tue, 27 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23749 Seasonal and diurnal periodicity in the release of Cronartium comandrae aeciospores from stem cankers on lodgepole pine http://cfs.nrcan.gc.ca/publications?id=23750 Tue, 27 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23750 Additional collections of Tuberculina maxima on pine stem rusts in western Canada http://cfs.nrcan.gc.ca/publications?id=23748 Mon, 26 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23748 Delineation of similar summer climatic regimes in central Alberta http://cfs.nrcan.gc.ca/publications?id=11921 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11921 Arthropods collected from stem rust cankers of hard pines in western Canada http://cfs.nrcan.gc.ca/publications?id=12032 Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=12032 Occurrence of Tuberculina maxima on pine stem rusts in western Canada http://cfs.nrcan.gc.ca/publications?id=23786 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23786 A list of vascular plants from Polaris Bay, Northwest Greenland http://cfs.nrcan.gc.ca/publications?id=23787 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23787 Incidence and effect of Tuberculina maxima on cankers of the pine stem rust, Cronartium comandrae http://cfs.nrcan.gc.ca/publications?id=23788 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23788 Fungi and bacteria associated with Cronartium comandrae on lodgepole pine in Alberta http://cfs.nrcan.gc.ca/publications?id=23789 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23789 Daily germination of Cronartium comandrae aeciospores http://cfs.nrcan.gc.ca/publications?id=23790 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23790 The arthropod fauna collected from the Comandra blister rust, Cronartium comandrae, on lodgepole pine in Alberta http://cfs.nrcan.gc.ca/publications?id=23791 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23791 Additional records of mycodiplosis larvae (Diptera: Cecidmyiidae) feeding on rust fungi http://cfs.nrcan.gc.ca/publications?id=23792 Thu, 29 Jan 2004 http://cfs.nrcan.gc.ca/publications?id=23792 Some implications of large-scale clearcutting in Alberta: a literature review http://cfs.nrcan.gc.ca/publications?id=11826 Most of the available information regarding the effects of clearcutting on climate, hydrology, stand establishment and protection from fire, disease and insects is reviewed and assessed. Tue, 22 Aug 2000 http://cfs.nrcan.gc.ca/publications?id=11826 Symposium on forest microclimate. http://cfs.nrcan.gc.ca/publications?id=33408 Fri, 23 Mar 2012 http://cfs.nrcan.gc.ca/publications?id=33408 Cronartium comandrae in Canada: its distribution and hosts http://cfs.nrcan.gc.ca/publications?id=23852 Fri, 06 Feb 2004 http://cfs.nrcan.gc.ca/publications?id=23852 Summer climate of the upper Columbia River Valley near Invermere, British Columbia http://cfs.nrcan.gc.ca/publications?id=23167 Fri, 07 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23167 Proceedings of the Third Forest Microclimate Symposium, Kananaskis Forest Experiment Station, Seebe, Alberta, September 23-26, 1969 http://cfs.nrcan.gc.ca/publications?id=23134 Wed, 05 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23134 Nuclear condition and germination characteristics of the aeciospores of Cronartium comandrae and C. comptoniae http://cfs.nrcan.gc.ca/publications?id=30164 Thu, 15 Oct 2009 http://cfs.nrcan.gc.ca/publications?id=30164 Historical study of the relation of major mountain pine beetle outbreaks in western Canada to seasonal weather http://cfs.nrcan.gc.ca/publications?id=23198 Fri, 14 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23198 Natural infection of Scots pine by lodgepole pine dwarf mistletoe in Canada http://cfs.nrcan.gc.ca/publications?id=30218 Fri, 16 Oct 2009 http://cfs.nrcan.gc.ca/publications?id=30218 A 24-hour impaction spore collector http://cfs.nrcan.gc.ca/publications?id=30334 Thu, 12 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30334 Some lichens and bryophytes from the Lake Hazen area, Ellesmere Island, N.W.T., Canada http://cfs.nrcan.gc.ca/publications?id=30335 Thu, 12 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30335 A study of habitat temperatures of the bark beetle Dendroctonus ponderosae Hopkins in lodgepole pine http://cfs.nrcan.gc.ca/publications?id=30337 Thu, 12 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30337 A cage for collecting insects from tree stems and branches http://cfs.nrcan.gc.ca/publications?id=30354 Fri, 13 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30354 Cytology of the Aeciospores and Aeciospore germ tubes of Peridermium Harknessii and P. Stalactiforme of the Cronartium Coleosporioides Complex http://cfs.nrcan.gc.ca/publications?id=30357 Cytology of aeciospores and aeciospore germ tubes of two pine rusts, Peridermium harknessii J. P. Moore and P. stalactiforme Arth. & Kern, was compared. In P. harknessii the mycelial cells giving rise to aecia were uninucleate. Young aeciospores were usually binucleate but most of them became uninucleate during maturation. Upon germination, nuclear division and septum formation occurred and germ tubes were divided into two, three, or four cells, each of which usually contained one nucleus. One to three side branches developed and nuclei migrated into them. Basidiospores were not produced. Despite the absence of basidiospores, P. harknessii is interpreted as having an endo-type life cycle with nuclear fusion and meiosis. In P. stalactiforme, aeciospores were binucleate and, upon germination, two nuclei migrated into the germ tube. The nuclei remained undivided during the formation of appressoria and infection pegs. Septa were not observed and branching was dichotomous or irregular. Fri, 13 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30357 A white spored Peridermium stalactiforme in Alberta http://cfs.nrcan.gc.ca/publications?id=30369 Fri, 13 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30369 Temperature and pH requirements for aeciospore germination of Peridermium Stalactiforme and P. Harknessii of the Cronartium Coleosporioides complex http://cfs.nrcan.gc.ca/publications?id=30370 Aeciospores of two caulicolous rusts, Peridermium stalacliforme Arth. & Kern (orange- and white-spored) and P. harknessii J. P. Moore, belonging to the Cronartium coleosporioides Arth. complex, were germinated under different temperature and pH conditions. P. stalactiforme germinated from 10 to 25 °C, and P. harknessii from 10 to 30 °C, with optima for both occurring between 15 and 20 °C. Germination was best at pH 6, markedly reduced at pH 5 and 8, and inhibited outside pH 5 to 9 in P. stalactiforme and pH 4 to 9 in P. harknessii. Growth at the optimum temperature and pH for 24 hours resulted in average germ tube lengths of 870 µ and 230 µ for P. stalactiforme and P. harknessii, respectively. P. harknessii initiated germination more rapidly than P. stalactiforme. Germ tubes of P. stalactiforme were long with multiple irregular short branches. The distal end of the germ tube often produced an appressorium with an infection peg. Germ tubes of P. harknessii were short, with one to three regular short branches and no appressoria. Few differences were found between the two color variants of P. stalactiforme. A technique for dispersing spores evenly on media is described. Fri, 13 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30370 Distribution and outbreaks of Dendroctonus Ponderosae Hopk. in forests of western Canada http://cfs.nrcan.gc.ca/publications?id=23202 Mon, 17 Nov 2003 http://cfs.nrcan.gc.ca/publications?id=23202 Changes in amounts of sunshine in British Columbia, 1901-1960 http://cfs.nrcan.gc.ca/publications?id=30404 Tue, 17 Nov 2009 http://cfs.nrcan.gc.ca/publications?id=30404 Annual and seasonal temperature and precipitation trends in British Columbia since 1890 http://cfs.nrcan.gc.ca/publications?id=25592 Thu, 18 Aug 2005 http://cfs.nrcan.gc.ca/publications?id=25592 The mountain pine beetle, Dendroctonus monticolae Hopk., in Western Canada: interim report http://cfs.nrcan.gc.ca/publications?id=31461 Mon, 15 Mar 2010 http://cfs.nrcan.gc.ca/publications?id=31461