Browse by Archive
ScholarsArchive at Oregon State University
|
In order to examine the potential impact of military jet overflights and other disturbances on productivity of peregrine falcons (Falco peregrinus), we observed behavioral reactions of peregrines to disturbances at nests along the Tanana River,...
1999-04-08 (iso8601)
|
|
The species compositions and densities of the littoral and pelagic zooplankton
assemblages in Crater Lake were compared. The littoral and pelagic zooplankton
assemblages of most lakes are typically different due to different habitat conditions in...
1998-05-29 (iso8601)
|
|
Two studies on Catherine Creek and Meadow Creek of the Upper Grande Ronde
River basin, quantified several physical and biotic influences on woody riparian community
composition and structure. The Catherine Creek study examined the association of...
1998-06-10 (iso8601)
|
|
Because riparian canopy controls most energy inputs to stream
ecosystems, it directly affects the structure of aquatic food webs and the
ecological processes that govern interactions among trophic levels. This
study addresses the interdependence...
1997-09-12 (iso8601)
|
|
Characteristics of minke whale (Balaenoptera acutorostrata) habitat at the head of the Laurentian Channel in the St. Lawrence Estuary, Canada were identified by quantifying environmental and temporal habitat variables and comparing them to the...
1998-06-11 (iso8601)
|
|
Forest carnivores such as the fisher have frequently been the target of conservation concern due to their association with older forests and assumed sensitivity to landscape-level habitat alteration. Although the fisher has been extirpated from...
1997-07-01 (iso8601)
|
|
The 3-5 year cyclical fluctuations in populations of many vole and lemming species have perplexed ecologists for many years. Numerous hypotheses have been proposed to explain microtine rodent cycles, including various aspects of social behavior....
1998-01-29 (iso8601)
|
|
The ability of northern goshawks (Accipiter gentilis) to persist in intensively
managed and selectively harvested forest habitats is largely unknown. To address the
concern that populations of northern goshawks in eastern Oregon may be declining...
1997-06-20 (iso8601)
|
|
In 2006–2010, effects of four different cattle stocking rates (0, 14.4, 28.8, and 43.2 animal unit months) were compared, representing 0%, 20%, 32%, and 46% utilization of vegetation by domestic livestock, on vegetation structure (as indexed by...
2011-11 (iso8601)
|
|
Nest sites of reticulate sculpin (Cottus perplexus) were located in two stream reaches, one from a basalt basin and one from a sandstone basin. Stream reaches were similar in gradient, basin area, elevation, climate, and riparian vegetation but...
1998-01-23 (iso8601)
|
|
Distribution and life history characteristics of lacustrine-adfluvial bull trout (Salvelinus
confluentus) were described in the North Fork Skokomish River Basin (including Lake
Cushman, a reservoir) from 1994 to 1996. Day snorkeling was conducted...
1998-02-26 (iso8601)
|
|
1997-11-14 (iso8601)
|
|
This study describes the composition of forest landscapes surrounding
northern spotted owl (Strix occidentalis caurina) nests in the central Cascade
Mountains of Oregon. I compared forest composition around 126 owl nests in 70 pair
territories...
1997-10-16 (iso8601)
|
|
The Pacific lamprey (Entosphenus tridentatus) is in decline in the Columbia River Basin, and translocating adult lamprey to bypass difficult migration corridors has been implemented since 2000. We describe and report results from two current...
2012-08 (iso8601)
|
|
Long-term research on freshwater ecosystems provides insights that can be difficult to obtain from other approaches. Widespread monitoring of ecologically relevant water-quality parameters spanning decades can facilitate important tests of...
2012-08 (iso8601)
|
|
To assess the impact of low-altitude jet overflights on parental care, we examined
nest attendance, time-activity budgets, and provisioning rates of 21 Peregrine Falcon
(Falco peregrinus) pairs breeding along the Tanana River, Alaska in 1995 and...
1998-12-14 (iso8601)
|
|
Species associations of fifteen major commercial groundfish species in the
northeastern Pacific ocean and their spatial and temporal characteristics were studied
using Oregon bottom trawl logbook data, 1987 to 1993. Screening procedures were used...
1997-08-29 (iso8601)
|
|
The control of feral goats (Capra hircus) and relevant aspects of their biology were
studied on Aldabra Atoll, Republic of Seychelles, from October 1993 - May 1994 and
November 1994 - May 1995. A total of 832 goats were killed on Aldabra using...
1997-10-09 (iso8601)
|
|
I studied the occurrence of two sympatric morphs of arctic charr, Salvelinus
alpinus (L.) in Vatnshlidarvatn, a small shallow lake in NW Iceland. The arctic charr
were subjectively distinguished by colour and appearance as brown morph or silver...
1996-10-15 (iso8601)
|
|
Diurnal time budgets and habitat use patterns of breeding Ugashik marbled godwits
(Limosa fedoa beringiae) were studied on the north-central portion of the Alaska Peninsula
during spring and summer 1995-1996. Marbled godwits were observed from...
1997-05-09 (iso8601)
|
