GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Canadian Science Publishing  (6)
Material
Publisher
  • Canadian Science Publishing  (6)
Person/Organisation
Language
Years
FID
Subjects(RVK)
  • 1
    Online Resource
    Online Resource
    Effects of stock type and site preparation on growth to crown closure of white spruce and lodgepole pine
    Canadian Science Publishing ; 1989
    In:  Canadian Journal of Forest Research Vol. 19, No. 2 ( 1989-02-01), p. 262-269
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 19, No. 2 ( 1989-02-01), p. 262-269
    Abstract: Growth of white spruce (Piceaglauca (Moench) Voss) and lodgepole pine (Pinuscontorta Dougl.) seedlings was studied on six installations, each containing different stock types and site-preparation treatments. Stock types included styroplugs from different cavity sizes, bare-root stock, and transplant stock; site preparations included no treatment, scalping, inverting, and mixing. Fertilizer was also used in combination with some of these treatments on some installations. Site-preparation treatments that gave some degree of vegetation control generally led to higher growth rates, but there was considerable variability among and within installations. The slope of the linear relationship of height versus age up to 10 years gave an estimate of early growth which was suitable for comparing treatments, whereas average height increment in a later measurement period gave a better estimate of growth for projection purposes. A normal distribution of growth rates around a mean for a particular stock type and site-preparation method was used in conjunction with height–dbh and crown width–dbh relationships to project growth of trees to crown closure, assuming different densities. The age at crown closure depended on both growth rate and density, and average size at crown closure depended primarily on density.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x89-037
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1989
    detail.hit.zdb_id: 430062-2
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Habitat–abundance relationships of the earthworm Eisenia rosea (Savigny) (Lumbricidae), using principal component regression analysis
    Canadian Science Publishing ; 1994
    In:  Canadian Journal of Zoology Vol. 72, No. 7 ( 1994-07-01), p. 1354-1361
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 72, No. 7 ( 1994-07-01), p. 1354-1361
    Abstract: Principal component regression analysis was used to investigate the relationships between the abundance of the earthworm Eisenia rosea and soil characteristics at two Ontario locations. To this end we summarized our environmental data matrix with principal component analysis and then used the first several principal components in a multiple regression analysis. This two-step procedure remedies problems associated with multicollinearity among our environmental variables. At one location, moisture was the main factor correlating with the abundance of E. rosea. At the other location, because high soil bulk density can compensate for low moisture, E. rosea abundance did not correlate with moisture.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z94-178
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 241716-9
    detail.hit.zdb_id: 1490831-1
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Height growth rates of young white spruce and lodgepole pine
    Canadian Science Publishing ; 1989
    In:  Canadian Journal of Forest Research Vol. 19, No. 2 ( 1989-02-01), p. 257-261
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 19, No. 2 ( 1989-02-01), p. 257-261
    Abstract: Growth of different stock types of white spruce and lodgepole pine were compared on untreated sites and sites treated by scalping, where the surface soil and vegetation had been removed by bulldozing; mixing, where the vegetation had been incorporated into the underlying soil; and clipping, where the vegetation was clipped. Height increments varied with measurement period but had a pronounced peak around age 9. The slope of the linear regression of height versus age up to 10 years gave estimates of average annual growth rates which were used to compare stock type and treatment effects. The growth rate of a tree of a particular size at the time of the first measurement after outplanting could not be predicted with confidence. However, the pattern of growth rates in a stock type of a species subjected to a particular site treatment exhibited characteristics that could be used to differentiate species, stock, and site-treatment effects. In white spruce, there was a tendency for growth rate to be related to size at first measurement, though with high variability around the trend. In lodgepole pine, growth rate was independent of tree size at first measurement, and showed less variability.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x89-036
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1989
    detail.hit.zdb_id: 430062-2
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Comparison of lodgepole pine yield tables
    Canadian Science Publishing ; 1987
    In:  Canadian Journal of Forest Research Vol. 17, No. 9 ( 1987-09-01), p. 1110-1114
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 17, No. 9 ( 1987-09-01), p. 1110-1114
    Abstract: Iterative solution of equations from Johnstone's variable-density yield tables for lodgepole pine permitted estimates of stand development index (DI) and productivity index (PI) from the volume, quadratic mean of diameter at breast height, basal area, or dominant–condominant height associated with a particular stand density at a particular age. Using such estimates, the yield tables of Smithers were compared with those of Johnstone. PI values associated with each of Smithers' site indices were calculated for British Columbia and Alberta. Results suggested that Johnstone's equations could be used in lodgepole pine stands in both British Columbia and Alberta, for PI values from 0.7 to 1.2, for densities up to 2500 stems acre −1 at age 70, and for ages up to 120. This considerably extends the range of application of these equations.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/x87-169
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1987
    detail.hit.zdb_id: 430062-2
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Persistent impairment of endothelium-dependent relaxation to acetylcholine and progression of atherosclerosis following 6 weeks of cholesterol feeding in the rabbit
    Canadian Science Publishing ; 1989
    In:  Canadian Journal of Physiology and Pharmacology Vol. 67, No. 11 ( 1989-11-01), p. 1454-1460
    Details
    In: Canadian Journal of Physiology and Pharmacology, Canadian Science Publishing, Vol. 67, No. 11 ( 1989-11-01), p. 1454-1460
    Abstract: The synthesis and (or) release of endothelium-dependent relaxant factor released by acetylcholine is impaired in New Zealand white rabbits fed an atherogenic diet. Experiments were designed to investigate whether the synthesis and (or) release of the endothelium-dependent relaxant factor from rabbit aortas are restored after reversal from an atherogenic diet to a non-atherogenic diet. Atherosclerosis was induced by feeding a diet containing lipids and 2% cholesterol for 6 weeks. Rabbits were sacrificed after 6 weeks on the atherogenic diet and 36 weeks after return to a standard laboratory diet. Synthesis and (or) release of the factor from the thoracic aorta was assayed using a bioassay system. The relaxant responses produced in the assay tissue were impaired both in the acute stage and after 36 weeks on non-atherogenic food. This impaired relaxation is probably due to a persistent functional abnormality in the aortic endothelium resulting in the failure to synthesize and (or) release endothelium-dependent relaxation factor 36 weeks after induction of atherosclerosis.Key words: endothelium dependent relaxation, rabbit aorta, atherosclerosis, regression, cholesterol feeding.
    Type of Medium: Online Resource
    ISSN: 0008-4212 , 1205-7541
    URL: Article
    DOI: 10.1139/y89-234
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1989
    detail.hit.zdb_id: 127527-6
    detail.hit.zdb_id: 2004356-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    A model for demonstration of reversal of impairment of endothelium-dependent relaxation in the cholesterol-fed rabbit
    Canadian Science Publishing ; 1990
    In:  Canadian Journal of Physiology and Pharmacology Vol. 68, No. 7 ( 1990-07-01), p. 845-850
    Details
    In: Canadian Journal of Physiology and Pharmacology, Canadian Science Publishing, Vol. 68, No. 7 ( 1990-07-01), p. 845-850
    Abstract: This investigation was undertaken to determine whether it was possible to restore endothelium-dependent relaxation (EDR) in the cholesterol-fed rabbit model of atherosclerosis following discontinuation of the cholesterol. New Zealand white rabbits, approximately 8 weeks of age, were randomized into (i) control group (9 animals fed a standard rabbit diet) and (ii) experimental group (27 animals: fed the same diet supplemented with 2.5% cholesterol). The experimental animals were restored to the standard diet after 3 weeks. EDR to acetylcholine (−9.0 to −5.0 log mol/L) was examined in the experimental animals at 3, 7, and 15 weeks after commencement of the study (n = 9 at each stage) and the nine control animals examined after 7 weeks. At the end of 7 weeks, EDR to acetylcholine (−6.0 log mol/L) was significantly (p  〈  0.05) impaired in the experimental group (34.3 ± 3.8%) compared with that in the control group (79.8 ± 3.0%). The loss of EDR was not apparent in the experimental group at 3 weeks (relaxation: 81.7 ± 4.7%). At the end of 15 weeks, the EDR was significantly restored in the experimental group (relaxation: 63.6 ± 5.1%). These findings demonstrate that it is possible to reverse the loss of EDR that occurs with cholesterol feeding in the rabbit by limiting the period of exposure to a high cholesterol diet.Key words: atherosclerosis, endothelium-dependent relaxation, rabbit aorta, regression.
    Type of Medium: Online Resource
    ISSN: 0008-4212 , 1205-7541
    URL: Article
    DOI: 10.1139/y90-128
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1990
    detail.hit.zdb_id: 127527-6
    detail.hit.zdb_id: 2004356-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...