Now showing items 1-10 of 35
A phylogenetic analysis of the genus Mertensia (Boraginaceae): taxonomy, divergence times, and biogeography
This study explores the taxonomy, systematics, and biogeography of
OVARIAN PHYSIOLOGY IN A NON-DOMESTICATED BIRD: MECHANISMS BEHIND THE ACCUMULATION AND VARIATION OF YOLK ANDROGENS IN HOUSE SPARROWS
In birds and other oviparous species, the accumulation of maternally-derived yolk androgens may represent an adaptive transgenerational information system. Researchers have found multiple effects of these yolk androgens ...
The functional morphology of hooding in cobras
(The Company of Biologists, 5/1/2010)
Many snakes, particularly cobras, form as part of a defensive display, a hood, an active lateral expansion of their neck skin and underlying musculature and ribs. We identified muscle groups possibly involved in hooding ...
Applied Investigations into Grizzly (Ursus arctos) and black bear (U. americanus) ecology and management
The following dissertation is composed of three stand-alone manuscripts. However all contribute to a working set of knowledge and techniques pertaining to the ecology and management of grizzly (Ursus arctos) and black (U. ...
N-P Co-Limitation of Primary Production and Response of Arthropods to N and P in Early Primary Succession on Mount St. Helens Volcano
(PLoS One, 2010)
The effect of low nutrient availability on plant-consumer interactions during early succession is poorly understood. The low productivity and complexity of primary successional communities are expected to limit diversity ...
Macroevolutionary patterns and processes of diversification in sedges (Cyperaceae), with emphasis on Eleocharis
This dissertation includes three chapters, the first two of which focus on the genus Eleocharis--an ecologically and economically important group of sedges containing over 250 species, with centers of diversity in seasonally ...
Niche separation of grizzly (Ursus arctos) and American black bears (Ursus americanus) in Yellowstone National Park
Three manuscripts constitute the following dissertation. Chapter one studied how sympatric grizzly bears and black bears in Yellowstone National Park relied on different food items to meet their energetic requirements. In ...
Predation on the Invasive Copepod, Pseudodiaptomus forbesi, and Native Zooplankton in the Lower Columbia River: An Experimental Approach to Quantify Differences in Prey-Specific Feeding Rates
(PLoS One, 2015)
Invasive planktonic crustaceans have become a prominent feature of aquatic communities worldwide, yet their effects on food webs are not well known. The Asian calanoid copepod, Pseudodiaptomus forbesi, introduced to the ...
The Effect of Consumers and Mutualists of Vaccinium membranaceum at Mount St. Helens: Dependence on Successional Context
(PLoS One, 2011)
In contrast to secondary succession, studies of terrestrial primary succession largely ignore the role of biotic interactions, other than plant facilitation and competition, despite the expectation that simplified interaction ...
Sieve Element Structure and Function
The distribution of photosynthetically derived assimilates through plants occurs in specialized cells called sieve elements that are connected to each other forming a microfluidic system within the plant. Sieve elements ...