Browsing Biology by Issue Date
Now showing items 1-20 of 207
-
Studies on the Mechanism of Phosphate Accumulation by Sea Urchin Embryos
(1954)The problem of phosphate entry into cells has been the subject of many studies with radioactive phosphorus during the past fifteen years. These studies, when compared with similar experiments with monovalent cations or ... -
History of climate and vegetation in the eastern Mediterranean and the Middle East from the Pleniglacial to the Mid-Holocene
(1983)Quaternary climates of the Middle East were investigated by reevaluating previous data and by analyzing pollen in radiocarbon-dated sediments. For comparison, assemblages of modern pollen were obtained from desert ... -
The effect of the introduction of cutthroat trout on the benthic community of Lake Lenore, Washington
(1986)In 1979, the Washington State Department of Game began stocking cutthroat trout (Salmo clarki henshawi) into Lake Lenore, a moderately alkaline lake that previously contained no resident populations of fish. In this ... -
Pattern and process in primary succession in high elevation habitats on Mount St. Helens
(1987)The mechanistic basis of primary succession remains poorly known. The facilitation model, thought to describe primary succession, stresses the environmental modifications caused by early colonists as important in promoting ... -
Phenotypic plasticity in the red alga Porphyra abbottae: environmental factors influencing light harvesting ability
(1990)Gametophytes of the red intertidal macroalga Porphyra abbottae were grown in batch cultures in order to examine some of their plastic responses to key environmental factors. Conchospores from a conchocelis stock culture ... -
Regulation of life history strategies with individuals in predictable and unpredictable environments
(1996)Animals must adjust their physiology and life histories to conform with changes in the environment. These changes can be fairly predictable, such as the changes in the season, or they can be unpredictable, such as an attack ... -
Ecological factors affecting rates of spread in Cytisus scoparius, an invasive exotic shrub
(1996)Invasions of exotic species are among our most daunting conservation challenges, and range expansion models provide us with a framework for modelling them. I have focussed on ecological factors contributing to variation ... -
Effects of repetitiveness, pairing and linkage on position-effect variegation in Drosophila
(1996)Position-effect variegation (PEV) is a long distance silencing effect that results in variable inactivation of one or many genes. PEV is caused by the abnormal juxtaposition of heterochromatin and euchromatin following ... -
Testosterone, estrogen, and breeding behavior in an Arctic bird, the Lapland longspur
(1997)Successful breeding in the Arctic requires precisely timed changes in reproductive behavior and physiology, and usually only one reproductive attempt per year is possible. Hormone and behavior patterns of Arctic breeders ... -
Distribution and diversity of alpine lichens: biotic and abiotic factors influencing alpine lichen communities in the northeast Olympic and North Cascade Mountains
(1998)Alpine lichens from six specific sites in the northeastern Olympic and North Cascade Mountains were studied. Sites included Elk Mountain, Deer Park, and Buckhorn cirque from the Olympic Mountains; and Skyline Divide, Slate ... -
The biology and taxonomy of Pacific Northwest species of Phaeocollybia Heim (Agaricales, Cortinariaceae)
(1998)Investigation of the agaric genus Phaeocollybia (Cortinariaceae) in British Columbia, Washington, Oregon and California has led to a better understanding of the biology of the genus and resulted in a taxonomic revision of ... -
Host use and diversification in symbiotic polychaetes
(1998)I studied development and larval biology, host use, and gamete interactions in three obligately symbiotic polychaetes in the genus Arctonoe (Family Polynoidae). The three polychaetes are ectosymbionts of other marine ... -
Defining the cis-acting requirements in the HMG-CoA reductase gene for karmellae biogenesis
(1999)In yeast and mammalian cells, increased levels of the ER membrane protein, HMG-CoA reductase (HMGR), induce specific ER membrane arrays. Yeast express two HMGR isozymes, Hmg1p and Hmg2p, each of which induces a morphologically ... -
Arrested succession in old fields within a temperate rain forest
(2000)Vegetation of old fields in the temperate rain forest of the Queets River Valley, Olympic National Park, Washington, USA remains dominated by exotic herbs 60 years after abandonment. Exploratory vegetation analyses revealed ... -
PIE-1, MEX-5, MEX-6, and soma/germline asymmetry in C. elegans embryos
(2000)The separation between soma and germline in C. elegans embryos occurs through a series of asymmetric cell divisions initiating with the 1-cell stage. Each of these divisions results in one daughter that will produce only ... -
Ecological interaction among natural enemies and its consequences for biological control
(2000)One goal in pest control is to develop methods that suppress pests without harming other organisms. With this in mind, an ideal method would be to augment nontarget organisms to control a pest. This can be accomplished by ... -
The role of habitat quality in shaping evolutionary dynamics, population dynamics, and conservation planning
(2001)Understanding ecological and evolutionary consequences of variation in habitat quality is increasingly important as biologists seek to address human-mediated environmental change. I investigated effects of natural temperature ... -
Systematics of Ulvaceae (Ulvales, Ulvophyceae) and the genus Ulva L. based on nuclear and chloroplast sequence data
(2001)Systematic hypotheses for Ulvaceae were tested using sequences for the chloroplast gene encoding the large subunit of RUBISCO (rbc L) and nuclear small subunit ribosomal DNA (18S rDNA). Ulvaceae sensu Floyd and O'Kelly ...