A population of Spermophilus beecheyi was studied to determine
patterns of individual spacing, behavioral interactions among different
sex and age classes, and the relationship between aspects of S. beecheyi
social structure and sociality to those of other sciurids. Research was
conducted on a population of squirrels living in an abandoned...
The microdistribution of the amphipod Eohaustorius brevicuspis was
examined over a 19 month period. Field sampling was conducted principally
at Lost Creek State Park, Oregon, and on one occasion at Driftwood State
Park, Oregon. Both are high-energy, fine sand beaches which appear to be
uniform. Stratified random samples were taken...
A fish sampling program was initiated at Cottage Grove Reservoir
in June of 1974 to investigate mercury accumulation in the fish.
Samples were collected periodicallv from June to November, 1974, and
from June, 1975 through January, 1976 from both the reservoir and its
tributaries. Species collected included spring chinook salmon...
This investigation examined the community structure of two intertidal sedimentary environments on the Oregon coast in terms of species composition and vertical distribution.
A coring device was used to obtain samples from two levels above MLLW in each beach on four occasions. Of the 54 taxa found, 46.2% were crustaceans,...
Controlled flow reductions of 75% apportioned over
four two-week intervals were studied during the summers of
1975 and 1976 on the North Fork of Elk Creek, an Oregon
coastal stream. The effects of reduced flows on invertebrate
drift, insect benthos, and the available food for
juvenile salmonids were measured.
Invertebrate...
Microbial populations associated with the major substrates of the
canopy of a 70 m old-growth Douglas fir were studied to determine
potential activities. Seasonal samples from bark, foliage, epiphytic
moss, lichens, and litter accumulations were collected to i) obtain
population data, ii) to isolate the major groups of microorganisms
present,...