Download or read book Effects of Treefall Gap Size and Age on Carbon and Nitrogen Biogeochemical Cycling in Northern Hardwood hemlock Forests written by Sarah Schliemann and published by . This book was released on 2011 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biogeochemical Cycling in Managed and Old growth Northern Hardwood and Hemlock Forests of the Upper Great Lakes Region written by Susan E. Crowley and published by . This book was released on 1999 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Patterns of Litterfall Nitrogen Cycling and Understory Vegetation in a Hemlock hardwood Forest written by James Bennett Ferrari and published by . This book was released on 1993 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Opening Size and Competition Levels on the Growth and Canopy Recruitment of Saplings in Northern Hardwood Forests written by John M. Goodburn and published by . This book was released on 2004 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Effects of Single tree and Group Selection on the Diversity and Productivity of Hemlock hardwood Forests written by Christopher R. Webster and published by . This book was released on 2002 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Soil Seed Banks Vegetation and Nitrogen Availability in Treefall Gaps written by David J. Mladenoff and published by . This book was released on 1985 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Size and Age Related Changes in Tree Structure and Function written by Frederick C. Meinzer and published by Springer Science & Business Media. This book was released on 2011-06-29 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Millions of trees live and grow all around us, and we all recognize the vital role they play in the world’s ecosystems. Publicity campaigns exhort us to plant yet more. Yet until recently comparatively little was known about the root causes of the physical changes that attend their growth. Since trees typically increase in size by three to four orders of magnitude in their journey to maturity, this gap in our knowledge has been a crucial issue to address. Here at last is a synthesis of the current state of our knowledge about both the causes and consequences of ontogenetic changes in key features of tree structure and function. During their ontogeny, trees undergo numerous changes in their physiological function, the structure and mechanical properties of their wood, and overall architecture and allometry. This book examines the central interplay between these changes and tree size and age. It also explores the impact these changes can have, at the level of the individual tree, on the emerging characteristics of forest ecosystems at various stages of their development. The analysis offers an explanation for the importance of discriminating between the varied physical properties arising from the nexus of size and age, as well as highlighting the implications these ontogenetic changes have for commercial forestry and climate change. This important and timely summation of our knowledge base in this area, written by highly respected researchers, will be of huge interest, not only to researchers, but also to forest managers and silviculturists.
Download or read book Long term Stand Development and Demographic Sustainability of Tree Populations in Northern Hardwood Forests written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An understanding of trajectories in long-term forest development is essential for examining several fundamental issues in forest ecology and management. Long-term forest development has important implications for issues as diverse as forest productivity, carbon storage, biological diversity, and ecological forestry methods. While much has been learned from studies of old-growth forests, a limitation is that these have necessarily been brief snapshots of species composition and forest structure at one point in time from which accurate trends are difficult to infer. The overarching themes of this dissertation are the long-term trajectory of forest development and the impact of the historic natural disturbance regime on that trajectory. Specific objectives were: (1) to quantify long-term trends in above-ground tree biomass and stand structure in northern hardwood forests, and effects of the natural disturbance regime, (2) to estimate the frequency of structural stand stages, along with residence times and transition rates among stages, under several disturbance regimes, and (3) to develop a quantitative approach to evaluating demographic sustainability of tree populations under several conditions, including those of restricted recruitment. Computer simulation with the CANOPY model was used to clarify long-term trends. However, to the extent possible, these model predictions were verified against available field data, including an extensive field survey and a 30-year record of change on permanent plots in the Porcupine Mountains Wilderness State Park. Major conclusions from this work were: (1) The Bormann-Likens hypothesis of a peak in biomass followed by a decline to a lower level was largely supported by both simulation and field data. The asymptotic biomass trend documented in recent chronosequences may be a consequence of using maximum tree age to estimate stand age. (2) The majority of landscapes of old-growth northern hardwoods is occupied by non-equilibrium stands, but nearly 1/3 was also structurally indistinguishable from steady state. Individual stands were highly dynamic, spending only a few decades in any structural stage. (3) Minimum sustainable tree populations had a variable slope in their size distribution. Enforcing a shallow fixed slope in understory trees typical of those used in uneven-aged management for larger trees rendered the stand unsustainable.
Download or read book Belowground Carbon Dynamics in Northern Hardwood Forests written by Gregory P. Zogg and published by . This book was released on 1997 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation of Treefall Gap Characteristics in an East Texas Bottomland Hardwood Forest written by Benjamin Eric Almquist and published by . This book was released on 1998 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Short term Forest Growth and Productivity in and Around Experimental Canopy Gaps in a Northern Hardwood Forest Wisconsin written by Jacob H. Dyer and published by . This book was released on 2009 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impacts of Climate Change on Carbon and Nitrogen Cycles in Boreal Forest Ecosystems written by Peter Eliasson and published by . This book was released on 2007 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulations of increased CO2 also confirmed positive growth response in the short term. The response of soil carbon was similar, however predicted to be less than the increase of biomass. Nitrogen availability and negative feedback mechanisms of the plant soil system were critical to the results, indicating that nitrogen progressively limited the growth response.
Download or read book Nitrogen Cycling and Nitrogen Saturation in Northern Hardwood Forest Ecosystems written by Linda Hildegarde Pardo and published by . This book was released on 1991 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Patterns of Microbial Biomass and Nitrogen Mineralization in Northern Hardwood Forests written by William E. Holmes and published by . This book was released on 1993 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sensitivity Analysis of a Nitrogen Cycling Model for a Northern Hardwood Forest written by Jessica Frances Sheldon and published by . This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant and Microbial Mechanisms of Nitrogen Retention in Northern Hardwood Forests Receiving Atmospheric NO3 Deposition written by William C. Eddy and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of the Canopy Opening on the Understory of an Old Growth Eastern Hemlock northern Hardwood Forest in South central Pennsylvania written by Mark J. Lewis and published by . This book was released on 2002 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
