Respiratory rates were measured, in situ, for the litter, the
soil, and the litter-soil subsystems of a Pseudotsuga menziesii forest
as a function of type of understory vegetation. The major objectives
were to demonstrate the utility of the litter layer as a distinct subsystem
of this forest ecosystem, to demonstrate...
The dynamics of land use in the State of Oregon are simulated
on a digital computer. The introductory chapter outlines the complex
nature of the problems facing the post-industrial society and argues
that the scientific and professional estates share in the responsibility
for public policy formulation. The second chapter .presents...
A study was undertaken in the Willamette Valley, Oregon, to document
1971 land use patterns as well as land use change in a smaller study
area in the 16 years prior, and to relate these to soil characteristics.
Quantification of these inter-relationships was aided by use of computer
tabulation and...
Forest managers are, and will continue to be, constantly confronted with the dilemma of choosing between different silvicultural and management systems to achieve various desired mixes of multiple-use benefits on specific forest properties. Such choices have to be made, unfortunately, because no single silvicultural or management system is ideal for...
The goal of the study was to collect data on the ecology and
reproduction of Sophora leachiana in order to help explain the rarity
and restricted range of this species. There are 13 known populations
of S. leachiana, occurring in a 29 by 6.4 km area in the Siskiyou
Mountains...
Fifty species and subspecies and six varieties in eight genera of
the family Tabanidae are recognized from Oregon. The following genera
are represented in Oregon: Apatolestes Williston, Pilimas Brennan,
Stonemyia Brennan, Silvius Meigen, Chrysops Meigen, Atylotus Osten
Sacken, Hybomitra Enderlein and Tabanus Linnaeus. Adults and larvae
were collected from various...
Caurinus dectes Russell is a minute, brachypterous scorpionfly
which was discovered at Marys Peak, Benton County, Oregon, in
1976, and subsequently described as the only representative of the
subfamily Caurininae within the Boreidae (snow scorpionflies).
Caurinus dectes is now known to range from the Olympic Peninsula
and Northern Cascades in...