1 edition of Sequential sampling of hemlock sawfly eggs in southeast Alaska found in the catalog.
Sequential sampling of hemlock sawfly eggs in southeast Alaska
John S. Hard
Issued Feb. 1971
|Series||U.S. Pacific Northwest Forest and Range Experiment Station. U.S.D.A. Forest Service research note PNW-142|
|The Physical Object|
|Pagination||9 p. illus.|
The effects of partial cutting on forest plant communities of western hemlock Sitka spruce stands in southeast Alaska. Eighteen sites were selected to sample a range of “time since. Wales Island, Alaska (55°26’18" N., °28’28" W.). These stands were se lected for two principal reasons. First, they contained Sitka spruce and western hemlock that typify the young-growth commercial timber base in southeast Alaska in terms of site quality, age, com position, and size. Second, the stands.
File FL - Specific gravity of Western Hemlock and Sitka Spruce in Southeast Alaska. Arctic Institute of North America collection; Office of Naval Research; Specific gravity of Western Hemlock and Sitka Spruce in Southeast Alaska. Sarg.) that developed within forests of Southeast Alaska that experienced near-catastrophic windthrow in the late s. The model suggests that the degree of dwarf mistletoe severity on western hemlock trees was significantly and positively correlated with levels of dwarf mistletoe infection and basal area (m2/ha) in large and small residual Cited by:
This publication was released by the Alaska Department of Natural Resources to provide information about the operations of the Division of Forestry during copies of this report were printed in Anchorage, Alaska at a cost of $ per copy. The Annual Report was produced by the Department of Natural Resources Division of Size: 29MB. SUMMARY OF SOUTHEAST ALASKA BIRD OBSERVATIONS: SPRING SEASON—March to May Sub-regional Compilers: Steven C. Heinl, 4 th Avenue, Ketchikan, AK Andrew W. Piston, P. O. Box , Ward Cove, AK This report summarizes bird sightings from Southeast Alaska for the spring season, whichFile Size: 2MB.
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Sequential sampling of hemlock sawfly eggs in Southeast Alaska. Portland, Or.: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S.
Dept. of Agriculture, . Hard, J. Sequential sampling of hemlock sawfly eggs in southeast Alaska. Res. Note PNW Portland, OR: U.S. Department of Agriculture, Forest Service; 9 p.
Objectives: To classify population densities of N. tsugae quickly and with known confidence, and to enable intergeneration comparisons of density. Abstract: The hemlock sawfly. Figure Severe defoliation of mature western hemlock caused by hemlock sawfly. mature larvae feed only on old foliage, Sequential sampling of hemlock sawfly eggs in southeast Alaska.
USDA For. Serv. Res. Note PNW, 9 p., The hemlock sawfly in southeast Alaska. USDA For. Serv. Res. Pap. PNW, 11 p. Pac. Northwest For. and. Neodiprion tsugae Middleton Hymenoptera: Diprionidae. Hard, J.S. Sequential sampling of hemlock sawfly eggs in southeast Alaska.
USDA Forest Service Research Notes PNW 9 pages. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http Author: J. Hard. Investigations were carried out to determine factors which permit the development of outbreaks of the hemlock saw-fly, Neodiprion tsugae Midd., within restricted portions of a wide range.
This was done through the observation of populations in the field, supported by laboratory studies designed to show that certain influences are important. Populations were found to be directly proportional to. Population estimates of eggs and larvae, directly obtained from habitat units, were fitted to theoretical spatial distribution and mean - variance models.
Sampling plans, based on fixed sample size, sequential sampling, and binomial sampling methods, were developed. Pupae were sampled with burlap traps of different designs.
The 1/8 inch, yellow-headed sawfly larvae feed for a month or so, starting on the new foliage (needles) and then moving to the mature ones. This is not a. Recent research on the management of hemlock-spruce forest in southeast Alaska for multiple values Article in Landscape and Urban Planning 72() April with 9 Reads.
Uses of the Eastern Hemlock: The Eastern Hemlock was used by many native American tribes to treat a variety of ailments, including rheumatism, arthritis, colds, coughs, fever, skin conditions, stiff joints, soreness, and Americans also used the bark to make dyes and the cambium as the base for breads and soups or mixed it with dried fruit and animal fat for pemmican.
Southeast Alaska has about million acres, of which two-thirds are vegetated. Almost 11 million acres are forest land and about 4 million acres have nonforest vegetation (herbs and shrubs). Species diversity is greatest in western hemlock–Alaska cedar closed-canopy forests, in mixed-conifer open and.
Book Title. Site index and height growth curves for unmanaged even-aged stands of western hemlock and sitka spruce in southeast Alaska / By. Farr, Wilbur A. Pacific Northwest Forest and Range Experiment Station (Portland, Or.) Publication Details Cited by: Sitka spruce and western hemlock beach logs in southeast Alaska (Research paper PNW) [Susan Ernst] on *FREE* shipping on qualifying : Susan Ernst.
Site index and height growth curves for unmanaged even-aged stands of western hemlock and sitka spruce in southeast Alaska / Related Titles. Series: Research paper PNW ; By. Farr, Wilbur A. Pacific Northwest Forest and Range Experiment Station (Portland, Or.) Type. Western hemlock does not attain the total height of Sitka spruce at maturity.
In the young fast-growing stand, however, the pro- portion of hemlock actually has little influence on the average height of dominants. Separate height curves for hemlock and spruce on a given plot or group of plots in such stands are usually very close to- gether.
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Sitka spruce and Western hemlock beach logs in southeast Alaska: suitability for lumber, pulp, and energy by Ernst, Susan; Plank, Marlin E; Fahey, D. J; Pacific Northwest Research Station (Portland, Or.).
~~. -" - - ~',_. ALASKA DEPARTMENT OF FISH AND GAME. J U N E A U, A L A S K A. STATE OF ALASKA Jay S. Hanunond, Governor. DEPARTMENT OF FISH AND GAME James W. Brooks. Southeast Alaska Hopes Timber Will Help Lure New Industries; Area Includes Million Acre Tongass National Forest of Hemlock and Spruce By Lawrence E.
Daviesspecial To the New York Times July 4. The eggs overwinter and hatch in late spring or early summer. Larvae go through up to seven instars (developmental stages of insects between molts) and then pupate in late summer. Larve feed voraciously on tree leaves. In Alaska, they would feed on leaves from alder, birch, aspen, poplar, willow, hemlock, larch and fir trees.
Only a few eggs were found after /2 hours of sampling. Too males and one female adult sawfly were observed on needles. Hard and Torgersen () mention that egg laying is completed by November 1 in Alaska. This egg survey might have been too early for total oviposition to have taken place, but surely the majority of egg laying should have been over by October 1.Wild, edible & medicinal plants in Southeast Alaska's rainforest: An introductory trail guide [Carol R.
Biggs] on *FREE* shipping on qualifying offers. Wild, edible & medicinal plants in Southeast Alaska's rainforest: An introductory trail guide1/5(1).hemlock, southeast Alaska, partial cutting. Summary Concern about the effects of clearcut harvesting on forest ecosystems in southeast Alaska has increased interest in alternative methods for regeneration and timber management such as partial cutting or uneven-age management.
In this study,Cited by: 1.