Phenological and Morphological Variation Among Some Paper Birch Seed Sources (Betula Papyrifera Marsh.). PDF Download
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Author: Jonathan Collieson Tetherly
Publisher:
ISBN:
Category : Birch
Languages : en
Pages : 246
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Author: Jonathan Collieson Tetherly
Publisher:
ISBN:
Category : Birch
Languages : en
Pages : 246
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Author: Nicole Balliet
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Paper birch is an ecologically valuable species with a broad geographic distribution and increasingly valuable commercial attributes. Its diversity, versatility and enduring nature make it an ideal candidate for a selective breeding program. However, an understanding of the genecology of the species and an understanding of the potential impacts of climate change will be fundamental to its success. The objectives of the trail were to determine if the phenotypic variability observed in paper birch for certain traits was due to genetics, the growing environment or an interaction between the two. Traits examined were bud flush (phenological) and height growth (morphological). Whether or not nursery practices were a factor was also examined. Twenty provenances of paper birch were collected from five regions in British Columbia (BC) and northern Idaho. Seedlings were grown at three nurseries in BC and Idaho and planted in a randomized single tree interlocking block design in three common gardens in BC and Idaho. Geographic variation in the timing of bud burst in paper birch is under genetic and environmental control. It follows climatic clines based on latitude, longitude and elevation. The signal for the onset of spring bud flush is determined by an interaction between air and soil temperature and photoperiod. Long distance displacement of provenances from their site of origin can lead to detrimental abiotic and biotic effects such as frost or pest damage. Differences in stock handling among nurseries and nursery displacement effects also influenced the growth and survival of some provenances. This information will be useful when developing seed zones and seed transfer guidelines for paper birch in BC. It will also help mitigate the potential impacts of climate change and will be beneficial if a selective breeding program is established.
Author: Michael Francis Sohasky
Publisher:
ISBN:
Category : European white birch
Languages : en
Pages : 282
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Author: United States. Forest Service
Publisher:
ISBN:
Category : Paper birch
Languages : en
Pages : 8
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Author: John C. Bjorkbom
Publisher:
ISBN:
Category : Germination
Languages : en
Pages : 12
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Paper birch trees are generally considered prolific seeders that produce at least some seed every year and very large crops of seed periodically. Seed dispersal is widely assumed to begin in early fall and to continue through the winter months. Germinative capacity has been assumed to be fairly low.
Author: Anjala Pyakurel
Publisher:
ISBN:
Category : Paper birch
Languages : en
Pages : 186
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"Leaf morphology and anatomy have been found to vary considerably among tree species, and leaf characteristics have widely been used for analyzing plant growth and resource use strategies because of their structural adaptation to withstand environments. Considering the changing climate projections, early-successional, broad niched species like paper birch (Betula papyrifera Marsh.) are expected to increase dominance due to a zonal shift of natural vegetation and/or open gaps within the current vegetation zones. Hence, it is important to understand factors such as leaf characteristics that enable these pioneer species to inhabit a wide geographic range and their increasing dominance. Paper birch is a pioneer tree species in North America that inhabits wide climatic and geographic gradients; in addition, the species has developed different leaf morphology and anatomy that have allowed paper birch to adapt to diverse habitats. This study examines how the leaf characteristics of paper birch vary under uniform and stressed environments. The major objectives were (a) to investigate leaf characteristics variations in paper birch populations grown in uniform environmental conditions as in a greenhouse and a common garden; (b) to correlate between leaf characteristics and paper birch’s environment of origins; (c) to investigate leaf characteristic variations in paper birch populations grown under different carbon dioxide concentrations [CO2] and soil water levels to determine the relationship between leaf characteristics and individual or interacting effects of [CO2], water levels and populations; and (d) to analyze the relationship within and between leaf morphology and anatomy of the birch populations. The study found significant differences among paper birch populations in leaf morphological characteristics under a uniform environment at the greenhouse and the common garden.
Author: Jerome Klein
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 102
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Author: David A. Marquis
Publisher:
ISBN:
Category : Birch
Languages : en
Pages : 24
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"Seed germination and seedling establishment of paper birch (Betula papyrifera Marsh.) and yellow birch (Betula alleghaniensis Britton) are most satisfactory where there is abundant soil moisture and freedom from excessively high soil temperature. In a cutover forest, these conditions occur most frequently in areas shaded from direct sunlight and on scarified seedbeds that contain exposed mineral soil (1.4). Attempts to encourage birch regeneration, then, could logically take two forms: use of cutting methods that provide the optimum degree of shade, and/or seedbed preparation. The study reported here deals with the first possibility.S3.
Author: Lawrence O. Safford
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 32
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Author: Robert M. Ricard
Publisher:
ISBN:
Category : Paper birch
Languages : en
Pages : 118
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