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Tuesday, July 28, 2020 | History

3 edition of Mortality estimation in fully stocked stands of young-growth Douglas-fir found in the catalog.

Mortality estimation in fully stocked stands of young-growth Douglas-fir

George R. Staebler

Mortality estimation in fully stocked stands of young-growth Douglas-fir

by George R. Staebler

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  • 17 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or .
Written in English

    Subjects:
  • Douglas fir -- Losses.

  • Edition Notes

    Statementby George R. Staebler.
    SeriesResearch paper -- no. 4., Research paper (Pacific Northwest Forest and Range Experiment Station (Portland, Or.)) -- no. 4.
    ContributionsPacific Northwest Forest and Range Experiment Station (Portland, Or.)
    The Physical Object
    Pagination8 leaves ;
    ID Numbers
    Open LibraryOL16143169M

    than that of young-growth Douglas-fir stands that are regener-ated after logging. Curtis and Marshall () reported ^ trees/ha in to year-old stands that regenerated naturally following logging. Six stands ranging from age 50 to 60 years had an average of trees/ha >20 cm DBH with a. Foliar biomass in the stands at Cascade Head averages 22 kg/ha (20, lb/acre) with a leaf area of m²/m² ( ft²/ft²) (8, 10). By comparison, available data indicate much lower values for highly productive Douglas-fir stands- 12 kg/ha and m²/m² (10, lb/acre and ft²/ft²), .

    ESTIMATION OF NATURAL MORTALITY IN FISH STOCKS: A REVIEW E F VETTER' ABSTRACT The instantaneous rate of natural mortality (M 1 is an important but prly quantified parameter in most mathematical models of fish stock report reviews methods used commonly to estimate M for fish stocks, sensitivity of same common fishery models to values chosen for M, and. Survival estimation therefore needs methods that account for the relocation probability independently of survival estimation. Tree survival rates, or reciprocally mortality rates, are important for foresters and conservationists, urban planners, as well as for biologists aiming to understand death .

    Stand age for Douglas-fir has been defined as the average age of dominant and codominant trees. It is commonly estimated by measuring the age of several dominants and codominants and computing their arithmetic average. Citation: Johnson, Floyd A. Estimating stand age for Douglas-fir. PNW Old Series Research Notes No. , p. stands for susceptibility to losses to Douglas-fir bee-tle. The system uses stand basal area, proportion of stand basal area in Douglas-fir, average stand age, and average diameter at breast height dbh of all. Douglas-firs larger than cm. Information is generally lacking on the habits and ecological relationships of the Douglas-fir beetle in.


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Mortality estimation in fully stocked stands of young-growth Douglas-fir by George R. Staebler Download PDF EPUB FB2

MORTALITY ESTIMATION IN FULLY STOCKED STANDS OF YOUNG-GROWTH DOUGLAS -FIR By George R. Staebler Puget Sound Research Center Mortality is an important element in the history of even-aged stands, yet in young-growth Douglas-fir little information exists on the amount of loss or how it varies from stand to stand.

Most of our. Mortality estimation in fully stocked stands of young-growth Douglas-fir Public Deposited. Analytics × Add Cited by: 5. Publisher: Portland, Or.: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. GROSS YIELD AND MORTALITY TABLES FOR, FULLY '" STOCKED STANDS OF DOUGLAS-FIR ', RESEARCH PAPER NO.

14 This file was About This File. created by sc VIIsscans identifi. ed by th the printed pu b/icar howev. er, s e software h. - lon., one mistakes n ay re. ave been correc tecl.; na1n. -- U.S. DEPARTMENT OF AGRICULTURE FOREST SERVICE. Mortality estimation in fully stocked stands of young-growth Douglas-fir / by George R.

: George R. Staebler. Mortality estimation in fully stocked stands of young-growth Douglas-fir. U.S. Forest Service, Pacific Northwest Forest and Range Experiment. Fire-caused tree mortality in thinned Douglas-fir stands in Patagonia, Argentina fully stocked stands of the.

This type of studies are relevant to estimate [Show full abstract]. Full Text; PDF ( K) PDF-Plus ( K) Citing articles; Ten-year growth and mortality in young Douglas-fir stands experiencing a range in Swiss needle cast severity. Douglas A. Maguire, a Douglas B.

Mainwaring, a Alan Kanaskie b. a College of Forestry, Oregon State. Average survival of Douglas-fir in natural stands was 60% at age 90 with 86% mortality from A.

ostoyae. Mortality began in planted stands about tree agesand in most natural stands about. For stands at all levels of density with bell-shaped diameter distribution curves, SDI = (T/A)(Dq/10) b. (2) 3 Estimating Density "Normal" or "fully stocked" even-aged stands have dominant, codominant, interme- Limits diate, and suppressed crown classes.

Most of the growth in these stands is in the dominant and codominant trees. Mortality estimation in fully-stocked stands of young-growth Douglas-fir. RP 8 p. 13 Worthington, Norman P.

Data. The data for this study come from Experimental Project (EP). This project is a large thinning and fertilisation trial established on the coast of British Columbia to examine the growth response of Douglas-fir and western hemlock to thinning and fertilisation (Darling and Omule ; Stone ).This study was initiated in and eventually encompassed plots at 85 installations.

Stands with Douglas-fir trees over l years old are occasionally encountered, however (Hemstrom and Franklin ). Senescence may appear in some old-gowth forests, although it appears that old-growth stands of Douglas-fir typically remain intact for to years. On the other hand, some stands may break up at years, while others.

Douglas fir use book. (Seattle, Wash.: West Coast Lumbermen's Association, ), by West Coast Lumbermen's Association (page images at HathiTrust; US access only) Die Douglas-Fichte und einige andere Nadelhölzer namentlich aus dem nordwest- lichen Amerika in. Tree mortality is a normal process that is an important facet of stand dynamics.

Information about tree mortality can be used to determine if there are any unusual spatial or temporal patterns in mortality rates; or if the balance between growth and mortality is adequate to sustain a forest ecosystem.

Mortality data contribute to the. publication, read Mapping and Managing Poorly Stocked Douglas-fir Stands, ECwhich defines terms, shows how to divide your trees into separate stands, and tells how to make sampling plans. Tools for Measuring Your Forest, ECdiscusses tools you need to measure your trees.

A computer program is available for those who want to avoid math. The volume in stands that are not fully stocked can be estimated with these tables by comparing the basal area of the stand being represented in a yield table with the basal area of a stand measured in the field.

The ratio of the two basal area estimates could be used to adjust the estimate of volume for the stand measured in the field. An analysis of the reduction of forest rotation to cope with drought events in a Douglas fir stand, Annals of Forest Science, /s, 76, 2, ().

Crossref. The stand self-thinning model proposed by Tang et al., although showing an objective uncertainty due to a relatively wide confidence interval, describes better than other models the relationships between stand density and average diameter in unthinned even-aged Calabrian pine stands in Calabria (Southern Italy).

In the case of the temporarily established experiments, we included only those stands whose SDI values substantiate that we selected fully stocked stands close to maximum stand density. Sterba () and Pretzsch (, p. ) report SDI ranges of – for Norway spruce, – for Scots pine, – for Douglas-fir, and –.

where Nmax is the maximum number of surviving trees per ha, D is the quadratic mean diameter [cm] and a 0, a 1 are empirical parameters which can be estimated from fully stocked, unthinned trials. Reineke ([]) plotted the number of trees per unit area of “fully stocked stands” over their average diameter and concluded that the a 1 parameter is a constant equal to (Oliver and .1.

Douglas-fir and grand fir in western Oregon except for Jackson and Josephine Counties. Douglas-fir and grand fir in western Washington except in silver fir zone. Western white pine in western Washington. Douglas-fir (except in mixed-conifer stands) and grand fir in California (King ).

a.Get this from a library! Growth and yield records from well-stocked stands of Douglas-fir: a summary of data and analyses resulting from the oldest permanent growth plots in the Pacific Northwest. [Richard L Williamson; Pacific Northwest Forest and Range Experiment Station (Portland, Or.)].