Zobrazeno 1 - 10
of 66
pro vyhledávání: '"John C. Tappeiner"'
Silviculture, once regarded solely as reforestation and growing trees for timber, is understood today as also maintaining forest health, reducing fire potential, benefitting wildlife and aesthetics, and ensuring multiple options for the future agains
Autor:
Klaus J. Puettmann, John C. Tappeiner
Publikováno v:
Forestry. 87:1-10
Foresters influence short- and long-term development of plant neighbourhoods, stands and landscapes by their managementpractices.Inthepast,mostofthesepracticeshaveaimedtohomogenizethecompositionandstructure of stands forefficient wood production.This
Publikováno v:
Forest Ecology and Management. 291:96-109
We studied stand development in three distinct forest types in southwestern Oregon using six stands each in uncut and clear-felled old-growth stands and nearby young stands (18 total). Old-growth stands showed a wide range of tree ages (>300 years) a
Autor:
Peter C. ImparaP.C. Impara, Peter J. Weisberg, Thomas S. SensenigT.S. Sensenig, Nathan J. Poage, John C. Tappeiner
Publikováno v:
Canadian Journal of Forest Research. 39:1518-1530
Knowledge of forest development is basic to understanding the ecology, dynamics, and management of forest ecosystems. We hypothesized that the age structure patterns of Douglas-fir at 205 old forest sites in western Oregon are extremely variable with
Publikováno v:
Canadian Journal of Forest Research. 39:765-776
In 1- to 2-year-old Douglas-fir ( Pseudotsuga menziesii (Mirb.) Franco var. menziesii) plantations near Cave Junction and Glendale, Oregon, sprout clumps of tanoak (Lithocarpus densiflorus (Hook. & Arn.) Rehd.) and other hardwoods were removed with h
Publikováno v:
Western Journal of Applied Forestry. 24:11-16
We studied the potential for stand density management treatments to increase growth rates of advanced regeneration in the understory of 50- to 70-year-old Douglas-fir (Pseudotsuga menziesii) forests. Study sites in Oregon included a mesic coastal sit
Publikováno v:
Forest Ecology and Management. 257:495-501
Abiotic stresses on seedling regeneration in xeric ecosystems are great, hence recruitment processes can be facilitated by stand factors that ameliorate the germinant-scale microenvironment. An experiment was conducted on the eastern slope of the Cas
Publikováno v:
New Forests. 34:95-105
An observational study of early seedling establishment (first 1–2 summers after emergence) was conducted in four ponderosa pine (Pinus ponderosa var. ponderosa Dougl. ex Laws.) stands east of the Cascade Range crest in central Oregon, USA. Newly em
Publikováno v:
Forest Ecology and Management. 235:44-53
Under a variable retention strategy , retained trees contribute to the structural complexity of the subsequent stand, and provide habitat for wildlife and shelter for regeneration and understory vegetation. The effects of retained trees on the stocki
Silvicultural Approaches to Develop Northern Spotted Owl Nesting Sites, Central Coast Ranges, Oregon
Autor:
John C. Tappeiner, Nathan J. Poage, James A. Thrailkill, Lawrence S. Andrews, John P. Perkins
Publikováno v:
Western Journal of Applied Forestry. 20:13-27
The life-history requirements of northern spotted owls (Strix occidentalis caurina), a federally listed “threatened” species, are associated with late-successional habitats. Nesting sites are an important habitat requirement for spotted owls. We