Treesearch

The book presents detailed information on the biology, habitats, and life histories of the 96 species of mammals of the Oregon coast. Soils, geology, and vegetation are described and related to wildlife habitats for the 65 terrestrial and 31 marine species. The book is not simply an identification guide to the Oregon coast mammals but is a dynamic portrayal of their habits and habitats. Life histories are based on fieldwork and available literature. An extensive bibliography is included. Personal anecdotes of the authors provide entertaining reading. The book should be of use to students,...

Lists 237 vascular plant taxa found in the 570-hectare Steamboat Mountain Research Natural Area. Notes on habitats, community types, and abundance are included for most taxa. This research note provides scientists, educators, and land managers with baseline information on the presence, location, and abundance of vascular plants within the Steamboat Mountain Research Natural Area. In the future, changes in the vegetation—additions, deletions, changes in abundance, and shifts in habitat—can be determined from this baseline. The checklist can also be used in evaluating the effects of human...

A 90-cm-diameter culvert with off-set baffles was set at a 10-percent gradient in an artificial stream channel on Admiralty Island, Alaska. Coho salmon, Dolly Varden char, and cutthroat trout, all less than 120-mm fork length, were able to move up the 9-m culvert. Additional work is needed to determine an upper discharge limit and to evaluate field installations.

Understory plants in closed 70-year-old even-aged Douglas-fir stands in north central Washington were destructively sampled to determine the relationship of ground cover and height to dry weight. Weight of plant material can be estimated from the product of plant height and percentage of ground cover on 50- x 100-centimeter (cm) quadrats. Correlation coefficients for equations developed range from .70 to .96. The equations are best suited for calculating loadings in similar stands.

Distributional data are given for 15 species of bats known to occur in Oregon: Antrozous pallidus, Eptesicus fuscus, Euderma maculatum, Lasionycteris noctivagans, Lasiurus cinereus, Myotis californicus, M. evotis, M. leibi, M. lucifugusf, M. thysanodes, M. volans, M. yumanensis, Pipistrellus hesperus, Plecotus townsendi, Tadarida brasiliensis. Distribution is also discussed in terms of physiography.

Red alder seeds were collected from six locations throughout the natural range of the species. Each seed lot was obtained from a single tree, and the seeds were used to determine germination with and without stratification treatment. Irrespective of treatment, germination varied significantly (P

The tops of ponderosa pine (Pinus ponderosa) trees were blown off with dynamite to create nest sites for cavity-nesting wildlife. The procedure included drilling a hole almost through the trunk, inserting the dynamite, and setting the charge with primacord and fuse. Trees were simultaneously innoculated with a decay organism. The average cost was $30 per tree.

Equations are presented for estimating weights of total crowns and crown components for Douglas-fir and western hemlock.

Heat units were accumulated during the spring and early summer for five seasons to relate degree-days to tussock moth and host tree phenology. Little variation in the pattern and date of the phenological events was found during the five seasons of monitoring near Fort Klamath, southern Oregon.

The occurrence of permafrost in stream valleys of central Alaska causes problems with conventional stream-gauging installations. To minimize both thermal and physical disturbance at measurement sites, pre-fabricated Parshall flumes have been used to monitor streamflow at sites underlain with permafrost in a subarctic research watershed. Flumes ranging in capacity from 263 to 700 liters per second (l/s) were installed and have performed satisfactorily for two open-water runoff seasons.