Download or read book Plant Succession Following Logging in the Sitka Spruce western Hemlock Forests of Southeast Alaska written by Paul B. Alaback and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Succession Following Logging in the Sitka Spruce western Hemlock Forests of Southeast Alaska Implications for Management written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Succession Following Logging in the Sitka Sprucewestern Hemlock Forest of Southeast Alaska written by Paul B. Alaback and published by . This book was released on 1984 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biomass and Production of Understory Vegetation in Seral Sitka Spruce western Hemlock Forests of Southeast Alaska written by Paul B. Alaback and published by . This book was released on 1981 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several understory conununities display successional stages during the first two hundred years following logging or fire disturbance in the coastal Picea-Tsua forests of southeast Alaska. Residual shrubs and tree seedlings increase their growth exponentially after overstory removal. Understory biomass peaks at about 5000 kghayr fifteen to twenty-five years after logging. Vascular plant understories are virtually eliminated (0-70 kgha^-1yr^-1) after forest canopies close at stand ages of twenty-five to thirty-five years. Bryophytes and ferns dominate understory biomass during the following century. A vascular understory of deciduous shrubs and herbs is reestablished after 140 to 160 years. Subsequent to this successional stage vascular understory biomass continues to increase, while bryophyte biotnass and tree productivity decline. Departures from this developmental sequence are related to unusual conditions of stand establishment, soil, microclimate, or disturbance. During the earliest phases of ecosystem development following forest canopy closure, the decline in understory development is associated with increases in tree basal area and higher percent tree canopy cover, In the oldgrowth forests increases in mean stand diameter, age, and biomass are correlated with increases in understory biomass, The pattern of understory development over the chronosequence is hypothesized as responding primarily to changes in the light environment wrought by developments in forest canopy structure. The development and duration of the depauperate understory stage that follows canopy closure in southeast Alaska was hypothesized as being related to the canopy characteristics of shade tolerant, high-leaf-area Tsuga forests. Maintenance of these forests in the aggradation stages of development (0-100 years) by forest management activites would minimize vascular understory vegetation development. Even including the pulse of vegetation growth during the first 30 years, understory vegetation productivity on normal soils would be less over a 100-year forest tree rotation than the annual productivity in old-growth forests. Food for herbivores and nutrient cycling processes associated with understory vegetation would be concomitantly minimized under this forest management policy.

Download or read book Management of Western Hemlock Sitka Spruce Forests for Timber Production written by Robert H. Ruth and published by . This book was released on 1979 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Performance in Southeast Alaska of Sitka Spruce Seedlings Produced at Two Nurseries written by John C. Zasada and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of decay in old growth western hemlock and Sitka spruce in southeast Alaska written by Wilbur A. Farr and published by . This book was released on 1976 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1985 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Luck Lake Timber Sales written by and published by . This book was released on 2000 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Download or read book Tongass Land Management Plan Revision written by Tongass National Forest (Agency : U.S.) and published by . This book was released on 1990 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Western Hemlock in Southeast Alaska written by Richard O. Woodfin and published by . This book was released on 1976 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Port Houghton Cape Fanshaw Timber Sale Project written by and published by . This book was released on 1996 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Land Management Plan Revision Environmental Impact Statement written by and published by . This book was released on 1997 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Ketchikan Pulp Company Long term Timber Sale Contract Polk Inlet written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tongass National Forest N F Stikine Area Shamrock Timber Sales written by and published by . This book was released on 1996 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: