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- Amphibians -- Effect of habitat modification on -- Oregon -- Wilson River Region (1)
- Culverts -- Environmental aspects -- Oregon -- Tillamook State Forest (1)
- Dam retirement -- California -- Lassen Volcanic National Park -- Case studies (1)
- Dam retirement -- Environmental aspects -- California -- Lassen Volcanic National Park -- Case studies (1)
- Dissostichus mawsoni -- Ecology -- Antarctica (1)
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- Fisheries -- Environmental aspects (1)
- Forest roads -- Environmental aspects -- Oregon -- Tillamook State Forest (1)
- Herpetology -- Research -- Oregon -- Wilson River Region (1)
- Marine biodiversity (1)
- McMurdo Sound (Antarctica) (1)
- Omus -- Oregon -- Portland (1)
- Revegetation -- California -- Lassen Volcanic National Park -- Case studies (1)
- Soil restoration -- California -- Lassen Volcanic National Park -- Case studies (1)
- Tiger beetles -- Morphology (1)
- Tiger beetles -- Sexual behavior (1)
- Watershed ecology -- Oregon -- Wilson River Region (1)
- Publication Type
Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Soil Development And Vegetation Response To Removal Of A Small Dam, Lassen Volcanic National Park, California, Stephanie Kay Rohdy
Soil Development And Vegetation Response To Removal Of A Small Dam, Lassen Volcanic National Park, California, Stephanie Kay Rohdy
Dissertations and Theses
Dam removal is increasing as dams age, yet little is understood about the pedogenic response to dam removal. This study reports on the edaphic changes of reservoir sediments and vegetation cover one year following removal of a small earthen dam in Northern California. In August 2012, I sampled surface sediments from the former Dream Lake reservoir in Lassen Volcanic National Park, and compared their physical and chemical properties with soil samples from two reference sites. I also estimated percent cover of vegetation in the former reservoir and reference sites. My results show that the reservoir was under reduced conditions, as …
Ecomorphology And Mating Behavior Of Two Species Of Night-Stalking Tiger Beetles, Omus Audouini And O. Dejeanii, Robert Kent Richardson
Ecomorphology And Mating Behavior Of Two Species Of Night-Stalking Tiger Beetles, Omus Audouini And O. Dejeanii, Robert Kent Richardson
Dissertations and Theses
Night-stalking tiger beetles (Cicindelinae: Omus) are among the least studied members of the highly diverse Carabid sub-family Cicindelinae, the tiger beetles. Despite populations of Omus being common in the forest floor habitats of the west coast of North America and their conspicuous predatory role within terrestrial arthropod communities, little is known about the biology and ecology of Omus.
Field studies showed that two species of Omus existed in the forested areas of Powell Butte Nature Park, Portland, Oregon, USA: Omus audouiniand O. dejeanii. The co-occurrence of sympatric, and likely syntopic, species allowed for a comparative approach in examining and analyzing …
Evaluating The Effects Of Road Crossing Structures On Stream-Associated Amphibians In The Wilson River Watershed, Tillamook State Forest, Oregon, Sara Erin Twitchell
Evaluating The Effects Of Road Crossing Structures On Stream-Associated Amphibians In The Wilson River Watershed, Tillamook State Forest, Oregon, Sara Erin Twitchell
Dissertations and Theses
As replacement and removal of undersized culverts gains momentum as an effective technique for restoring natural stream flows and removing fish passage barriers, it is important to evaluate the benefits of these efforts on the in-stream and adjacent riparian habitat for other species of potential concern. This study compares stream-associated amphibian (SAA) occurrence in streams adjacent to different road crossing structures on unpaved forest roads in the Wilson River watershed located within the Tillamook State Forest, Oregon. Surveys were conducted at road crossing structures for three taxa of SAA; Pacific giant salamander (Dicamptodon tenebrosus), coastal tailed frog (Ascaphus truei), and …
Rapid Change In Shallow Water Fish Species Composition In An Historically Stable Antarctic Environment, Bradley A. Buckley
Rapid Change In Shallow Water Fish Species Composition In An Historically Stable Antarctic Environment, Bradley A. Buckley
Biology Faculty Publications and Presentations
McMurdo Sound, Antarctica, is home to a unique marine biota with an ecology that has evolved in this frigid environment over millions of years. The region is one of the least disturbed, and possibly the last pristine, marine ecosystem on Earth. Here, the results of three seasons of fishing in the shallow nearshore waters of McMurdo Sound are reported. A shift in the composition of small fish species at one site, Inaccessible Island, has been observed in just five years. The shift in shallow water species composition occurred during a period that followed the maturation of a commercial fishery for …