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 by a predator or an unusual storm. A finite state machine model was developed to understand individual ...

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 may therefore be different from those seen in lower-latitude species with longer breeding seasons. During ...

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 Peak and the Tatie Peak area of the North Cascade Mountains. Lichens and vascular plants, and bryophytes ...

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 (originated from a single carpospore) were grown under various conditions of photon flux density (PFD) and ...

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 in population growth and spread in Cytisus scoparius (Scotch broom), an exotic shrub invading western ...

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 Pacific Northwest species. Discovery of mycelial and pseudorhizal connections to mantle-sheathed rootlet ...

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 distinct proliferation of the ER. Hmg2p induces short stacks of ER membranes that may be found ...

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 chromosome breakage. By using artificially constructed transgene arrays, I have found that the effects of ...

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 invertebrates, and within the Puget Sound region, their host ranges do not overlap. Except for A. fragilis, ...