evaluation of eight intertree competition indices

  • 1.17 MB
  • English
Oregon State University, School of Forestry , Corvallis, Or
Douglas fir -- Growth., Plant competition -- Mathematical models., Forest thin
StatementCharles S. Noone, John F. Bell.
SeriesResearch note / Oregon State University, Forest Research Laboratory -- 66., Research note (Oregon State University. Forest Research Laboratory) -- no. 66.
ContributionsBell, John F., Oregon State University. Forest Research Laboratory.
The Physical Object
Pagination6 p. ;
ID Numbers
Open LibraryOL16043818M

Competition indices play a significant role in modeling individual-tree growth and survival. In this study, six distance-independent competition indices were evaluated using permanent plots of. Evaluating the performance of semi-distance-independent competition indices in predicting the basal area growth of individual trees Article in Canadian Journal of Forest Research 40(4) Author: Thomas Ledermann.

The first task of each simulation step is the calculation of the degree of competition for each tree according to a number of competition indices. Such indices are based in the geometry of tree distribution around each tree. After defining the degree of competition, natural mortality within the Cited by: 6.

Research Highlights: We applied neighborhood and dendro-ecological methods in a stand with a year record of forest dynamics, finding that growth will decrease for several species under predicted climate trends.

Background and Objectives: Conventional tree-ring analysis removes the influence of competition and size on growth, precluding assessment of the relative influence of these : Seth W. Bigelow, James R.

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Runkle, Evan M. Oswald. Since competition is often held to be the most significant factor influencing forest dynamics (Pacala et al., ), on average the trees growing free from competition should be the biggest and most productive individuals over their lifespan, with greater survivorship, increment, and Cited by: Lack of knowledge of individual tree growth in species-rich, mixed forest ecosystems impedes their sustainable management.

In this study, species-specific models for predicting individual diameter at breast height (dbh) and total tree height (h) growth were developed for 30 tree species growing in mixed and uneven-aged forest stands in Durango, Mexico.

Growth models were also developed for all. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. The book is structured so that Chaps. 2 and 3 give information about the biology and growth of plantation forests and the properties and uses of the wood that is harvested from them.

This book presents methods which are relevant to Evaluation of eight intertree competition indices book management and planning: analysing forest structures, silvicultural and planning, economic evaluation, based on examples in Europe, Asia, Africa and North and South America.

Categories: Biology\\Plants: Agriculture and Forestry. [1] We review evidence for climate change over the past several millennia from instrumental and high‐resolution climate “proxy” data sources and climate modeling studies.

We focus on changes over the past 1 to 2 millennia. We assess reconstructions and modeling studies analyzing a number of different climate fields, including atmospheric circulation diagnostics, precipitation, and by: 46 surface temperature reconstructions for the last 2, years sents the altitudinal or latitudinal limit to tree growth (KullmanKörner ).

From a review of published data, Grace () concluded that a 1 °C increase in a. impact evaluation frameworks, and (4) some research needs. Financial incentives over the near future are not favorable for more intensive aspen management, but changes in costs, prices, and values of nontimber products could change this some-what pessimistic outlook.

All Cited by: 1. Prepared in Information Office of Pacific Northwest Region, Forest Service, U S. Department of Agriculture, Portland, OR Publication No.: R6-F&WL Editorial Review Panel.

Acknowledgements iii Acknowledgements The Managing Your Woodland was revised by the Small Woodlands Program of BC, an initiative of Forest Renewal BC. The program is designed to encourage owners of private forest lands in BC to manage their properties in an economically and environmentally sustainable manner.

The effect of laminated (Phellinus) root rot in coastal second growth Douglas-fir ecosystems of southeastern Vancouver Island was investigated in ecosystems centered around growth and yield permanent sample plots (PSP's).

The impact of Phellinus root rot on stand productivity was estimated from PSP records and a percent basal area reduction (%BAR) parameter estimate.

The relationship between climate and tree ring chronologies has been considered mainly in relation to temporal variations in the climate regime, and has mainly focused on trees on moisture-stressed sites and/or at the edge of their range.

In this thesis, I examined whether temporal patterns in tree ring chronologies within and between three western North American tree species, all growing on. For these simulations, the meteorological and atmospheric deposition record at the Nolan site during the period 1 Jan.

to 31 Dec. was repeated eight times to simulate deposition during a yr period (Johnson et al., ). At Coweeta, meteorological data from the period 1 Jan. to 31 Dec. were repeated 24 times. average length of four to eight pages; • may be developed with a distinctive regional look; • may have a topic indicator, placed in the scholar’s column, under the author’s block on the front page, to indicate subject area (e.g., for Biodi-versity, Soil Conservation, Silvicultural Systems, Growth and Yield, or Demonstration Forests).

40 Anniversary Conference Gesellschaft für Ökologie 40th Anniversary Conference Gesellschaft für Ökologie Book of Abstracts August 30th to September 03rd, ECOLOGICAL SOCIETY OF GERMANY, AUSTRIA AND SWITZERLAND 40th Anniversary Conference “The Future of Biodiversity: Genes, Species, Ecosystems” Justus-Liebig-University Giessen 30th August – 03rd September.

This book is targeted at a new generation of students, who as professionals can play a cru-cial role in facilitating research and development for and by farmers to make a better world. As the research needs of all 20 chapters show, there is an enormous amount yet to be learned and discovered.

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managing a wood lot. Intertree competition indices and effects were examined in 14 uneven-aged ponderosa pine (Pinus ponderosa var. scopulorum Engelm.) stands in eastern Montana. Location, height, diameter at breast height (DBH), basal area increment, crown ratio, and sapwood area were determined for each tree (DBH > cm) on one stem-mapped plot.

Forest Genetics 9 Some aspects of the environment can be altered by silvicultural treatments in managed forests such as fertilization to improve soil nutrients, bedding prior to planting to improve soil moisture conditions, weed control and thinning to reduce intertree competition.

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This interactive tool provides information about several of our nation's major ecosystems, the services they provide, and how those services, or their degradation and loss, may affect people. Preface The main purpose of this book is to discuss and promote the study of the evolution of fruit y (Diptera: Tephritidae) behavior.

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