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Patterns Of Distribution Growth And Seedling Survival In Sympatric Red Fir Abies Magnifica And White Fir A Concolor In The Sierra Nevada
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Book Synopsis Patterns of Distribution, Growth, and Seedling Survival in Sympatric Red Fir (Abies Magnifica) and White Fir (A. Concolor) in the Sierra Nevada by : Michael Emil Kunz
Download or read book Patterns of Distribution, Growth, and Seedling Survival in Sympatric Red Fir (Abies Magnifica) and White Fir (A. Concolor) in the Sierra Nevada written by Michael Emil Kunz and published by . This book was released on 1988 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seed Maturity in White Fir and Red Fir by : William W. Oliver
Download or read book Seed Maturity in White Fir and Red Fir written by William W. Oliver and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The American Midland Naturalist by :
Download or read book The American Midland Naturalist written by and published by . This book was released on 1991 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: A refereed, broad-spectrum journal publishing basic research in diverse disciplines in biology and varied taxa.
Download or read book Phytocoenologia written by and published by . This book was released on 1995 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Environmental Control of Seedling Establishment in a Subalpine Forest Association of Red Fir and Lodgepole Pine at Deadman Creek, Mono County, California by : Charles Christopher Carpenter
Download or read book The Environmental Control of Seedling Establishment in a Subalpine Forest Association of Red Fir and Lodgepole Pine at Deadman Creek, Mono County, California written by Charles Christopher Carpenter and published by . This book was released on 1991 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dispersal of White and Shasta Red Fir Seeds on a Clearcut by : Jerry F. Franklin
Download or read book Dispersal of White and Shasta Red Fir Seeds on a Clearcut written by Jerry F. Franklin and published by . This book was released on 1974 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Timing and Duration of Release Treatments Affect Vegetation Development in a Young California White Fir Plantation by : Philip M. McDonald
Download or read book Timing and Duration of Release Treatments Affect Vegetation Development in a Young California White Fir Plantation written by Philip M. McDonald and published by . This book was released on 2001 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic and Environmental Control of Height Growth Components in Seedlings of California Red and White Fir (Abies Magnifica A. Murr and A. Concolor [Gord. and Glend.] Lindl.) by : Stephen William Hallgren
Download or read book Genetic and Environmental Control of Height Growth Components in Seedlings of California Red and White Fir (Abies Magnifica A. Murr and A. Concolor [Gord. and Glend.] Lindl.) written by Stephen William Hallgren and published by . This book was released on 1984 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shade Improves Survival Rate of Outplanted 2-0 Red Fir Seedlings by : Donald T. Gordon
Download or read book Shade Improves Survival Rate of Outplanted 2-0 Red Fir Seedlings written by Donald T. Gordon and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporal and Spatial Variability of the Importance of Regeneration Microsite for Abies Magnifica Seedlings on Arid Range Margins by : Michelle Kristine Hochrein
Download or read book Temporal and Spatial Variability of the Importance of Regeneration Microsite for Abies Magnifica Seedlings on Arid Range Margins written by Michelle Kristine Hochrein and published by . This book was released on 2013 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microsites created by vegetation can influence the emergence and establishment of seedlings by altering local temperature, soil moisture, and ameliorating stressful environmental conditions. Forest structure and composition can be influenced by conifer regeneration in favorable patches, and in arid and semi-arid environments, microsites that ameliorate drought stress are important regeneration sites. Abies magnifica (California red fir) trees have a wide distribution across the western slope of the Sierra Nevada, but grow in a narrow band on the eastern slope of the Carson Range in the rain shadow of the Sierra Nevada crest. A.magnifica seedlings can be sensitive to summer drought, extreme soil temperatures, and intense solar radiation. Microsite amelioration may aid A.magnifica establishment and survival, and my goal was to understand the role of vegetative microsites in successful A.magnifica regeneration under some of the most arid conditions the species encounters. I compared A.magnifica natural seedling establishment in open and shaded microsites across an altitudinal gradient of environmental stress on the eastern slope of the Carson Range. Seedling distribution, growth, soil moisture and soil temperatures were sampled in the summer of 2011 and 2012. In the fall of 2011, A.magnifica seeds were planted in open and shrub-shaded microsites across the altitudinal range and monitored for emergence and survival the following summer. 2011 and 2012 differed in winter weather conditions, and temperature stress and soil moisture limitations were more extreme following a winter of low snowpack. In 2011, (a year with higher than average snowpack), seedling observations and soil moisture were uniform among microsites and elevations. However, in 2012, (a year with lower than average snowpack), soil moisture was non-uniform across microsites and elevations and seedling observations were higher in microsites with greater soil moisture. Specifically, more seedlings were observed in microsites with greater subsurface moisture, which were open microsites at high elevations and shrub-shaded microsites at low elevations. A very low proportion of seedlings emerged in experimental plots and nearly complete mortality signified significant issues with environmental stress in 2012. Poor success could also be related to seed genetic variability, as A.magnifica seeds were harvested from trees on the western slope of the Sierra Nevada and may not have been as genetically tolerant of drier conditions experienced on the eastern Carson Range. Fewer first-year seedlings were observed in 2012 than 2011, suggesting pulses of seedling emergence in wet years and declines in dry years. Facilitative effects of shrubs varied spatially in the low snowpack year, with shrubs tending to have greater positive effects on soil moisture and temperature at low elevations, where soil moisture was chronically low. The importance of shrub facilitation changed over the altitudinal gradient of stress, consistent with the stress gradient hypothesis. Long-term declines of winter snowpacks could result in declines of A.magnifica seedling emergence, which could alter the overall structure of A.magnifica forests. Facilitative effects were stronger in years with greater environmental stress and weaker in years with less environmental stress, showing evidence of temporal variability of the stress gradient hypothesis. Thus, shrub cover may be vital for maintaining forest structure and composition at low elevations if snowpacks decline in a changing climate. These results highlight the temporal and spatial shifts of shrub facilitation on the emergence and establishment of A.magnifica seedlings, and can help direct future forest management.
Book Synopsis Germination, Survival and Early Growth of Conifer Seedlings in Two Habitat Types (Classic Reprint) by : Don Minore
Download or read book Germination, Survival and Early Growth of Conifer Seedlings in Two Habitat Types (Classic Reprint) written by Don Minore and published by Forgotten Books. This book was released on 2018-08-08 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Germination, Survival and Early Growth of Conifer Seedlings in Two Habitat Types Seed germination and seedling survival in the field are as important to natural forest regeneration as are the production and dispersal of seeds. Many seeds are produced and dispersed, but most do not germinate or they fail to survive after germination. This severe seed and seedling mortality multiplies the number of seeds required to obtain natural regeneration. It also acts as a selective factor in determining the genetics of future stands. The relation of dispersed seed populations to established seedling populations is not well known for most high elevation forests in the Pacific Northwest. Production and dispersal of conifer seeds in the Abies amabilis forest zone described by Franklin and Dyrness (1973) have been well studied (carkin and others 1978; Franklin and others 1974; Franklin and Smith 1974a, 1974b), but little work has been done on the fate of those seeds. Sullivan (1978) compared forest regenera tion on clearcuts in several habitat types within the Abies amabilis zone and con cluded that regeneration differed significantly among habitat types, but he did not relate his observations and conclusions to the seed supply. Neither did Halverson and Emmingham who were unable to correlate forest regeneration in the Abies amabilis zone with habitat types, but found extremes in environment to be the most probable cause of regeneration failure. Seidel (1979a) surveyed mixed conifer regeneration on many clearcuts along the east side of the Cascade Range and in the Blue Mountains of Oregon. He measured the variation among plant community types and geographic locations, but did not relate established regeneration to amounts of seed or early seedling mortality and did not derive any ratios for seeds to established seedlings. Seidel (1979b) also studied regeneration after shelterwood cutting in a grand fir (abies grandis (dougl. Ex D. Don) Lindl.) Shasta red fir (abies magnifica var. Shastensis Lemm.) stand in central Oregon. The number of sound seeds collected in his seed traps can be compared to the number of seedlings that became established during the 5-year measurement period to derive seed-to-seedling ratios for four slash treatments under three overstory densities. Those ratios varied from about on bulldozed seedbeds under an overstory with basal area of square meters per hectare to about on undisturbed seedbeds under the same overstory. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Dormancy in Abies Seedlings by : Chao-hsiung Tung
Download or read book Dormancy in Abies Seedlings written by Chao-hsiung Tung and published by . This book was released on 1987 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full range of experiments was carried out to investigate the effects of environmental factors on the terminal bud dormancy in two high-elevation true fir species, Shasta red fir (Abies magnifica A. Murr. var. shastensis Lemm.) and noble fir (A. procera Rehd.), seedlings. Photoperiod, thermoperiod and moisture stress were of main interest. In container-grown seedlings, it was found that warm thermoperiod with moderate moisture stress and cool thermoperiod with low moisture stress induced dormancy in the initial stage of the experiment. Short photoperiod with warm thermoperiod and long photoperiod with cool thermoperiod hastened onset of dormancy in a later stage. Short photoperiod and cool thermoperiod, which acted independently, could also induce dormancy. Both Shasta red fir and noble fir seedlings showed a typical terminal bud dormancy. Six to eight weeks of chilling were required to overcome the dormancy. Dormancy induction method influenced chilling requirements. Seedlings induced into dormancy by long cool days required less chilling than did the seedlings induced into dormancy by short warm days. Long photoperiod during chilling could conpensate for inadequate chilling. The survival, phenology and growth of non-chilled true fir seedlings were determined for two seasons in two irrigation regimes. Regardless of species, survival was not different between any treatments. Unchilled terminal buds stayed inactive during the first season after outplanting. These terminal buds resumed growth after being chilled naturally during the winter. Lateral branch development was observed for both growing seasons. Growth was greater in the moist irrigation regime than the dry irrigation regime. Dormancy induction in natural low- and high-elevation environments was investigated by using a switch-back experimental design. It was determined that lower night temperature in the high-elevation areas triggered growth cessation in the seedlings and thus earlier dormancy. High moisture stress early in the season could also prematurely cease seedling growth and impose stress-induced dormancy.
Book Synopsis Poplars and Willows by : Jud G. Isebrands
Download or read book Poplars and Willows written by Jud G. Isebrands and published by CABI. This book was released on 2014-02-12 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poplars and willows form an important component of forestry and agricultural systems, providing a wide range of wood and non-wood products. This book synthesizes research on poplars and willows, providing a practical worldwide overview and guide to their basic characteristics, cultivation and use, issues, problems and trends. Prominence is given to environmental benefits and the importance of poplar and willow cultivation in meeting the needs of people and communities, sustainable livelihoods, land use and development.
Book Synopsis Physiological Ecology of North American Plant Communities by : Brain F. Chabot
Download or read book Physiological Ecology of North American Plant Communities written by Brain F. Chabot and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although, as W.D. Billings notes in his chapter in this book. the development of physiological ecology can be traced back to the very beginnings of the study of ecology it is clear that the modern development of this field in North America is due in the large part to the efforts of Billings alone. The foundation that Billings laid in the late 1950s came from his own studies on deserts and subsequently arctic and alpine plants, and also from his enormous success in instilling enthusiasm for the field in the numerous students attracted to the plant ecology program at Duke University. Billings' own studies provided the model for subsequent work in this field. Physiological techniques. normally confined to the laboratory. were brought into the field to examine processes under natural environmental conditions. These field studies were accompanied by experiments under controlled conditions where the relative impact of various factors could be assessed and further where genetic as opposed to environmental influences could be separated. This blending of field and laboratory approaches promoted the design of experiments which were of direct relevance to understanding the distribution and abundance of plants in nature. Physiological mechanisms were studied and assessed in the context of the functioning of plants under natural conditions rather than as an end in itself.
Book Synopsis Herpetological Communities by : Norman J. Scott
Download or read book Herpetological Communities written by Norman J. Scott and published by . This book was released on 1982 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silvics of Forest Trees of the United States by :
Download or read book Silvics of Forest Trees of the United States written by and published by . This book was released on 1965 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildland Fire in Ecosystems written by and published by . This book was released on 1998 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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