We deployed CO, and 0, sensors on the U.S. continental shelf off Cape Hatteras, North Carolina, during late summer 1994. A continuous 32-d gas record was obtained at 20 m in 25 m of water, below the thermocline for most of the period. Analysis of the correlation between CO, and 0, indicates that biological and advective processes dominated the gas variability, with small or insignificant fluxes...

—Fire has been an imperative ecological force that has shaped the natural history andculture of the Southeastern Coastal Plain. In the past, humans have influenced the “ natural” roleof fire in the southeast, first by Native Americans, then by Spanish and other European settlement,and finally by modern culture. As human culture developed, fire, and how it influenced wildlifepopu...

We tested the prey-base hypothesis to determine whether selection of red squirrel (Tamiasciurus hudsonicus) midden sites (cone caches) by American martens (Martes americana) for resting and denning could be attributed to greater abundance of small-mammal prey. Five years of livetrapping at 180 sampling stations in 2 drainages showed that small mammals, particularly red-backed voles (Clethrionom...

Cell biology owes some of its greatest discoveries to the electron microscope, and few were more passionate about its power to ‘‘wrest from nature her closely guarded secrets’’ than Don Wayne Fawcett. A pioneer of electron microscopy and one of its greatest practitioners for studying the organization of cells and tissues, Fawcett died at his home in Missoula, Montana on May 7, 2009 at the age o...

The US southwest is home to a remarkable bug. Cicadas, a common sap-feeding insect, are most known for their ear-splitting mating songs, which seem at times to dominate theairwaves.However, inside specializedcells in theirbodies, cicadas host less known but perhaps more remarkable bugs—of the bacterial variety. A cicada’s bacterial symbionts provide the insect with the essential amino acids it ...

In a preliminary survey of 30 strains of type A Clostridium perfringens freshly isolated from human feces, soil, and foods, a wide variation in their lecithinase activities was observed (J. A. Schulze, M.S. Thesis, Univ. of Montana, Missoula, Montana, 1968). Other investigators also have noted such variations (1, 2, 5). Variation in lecithinase production by strains of C. perfringens may be the...

The foliar compliment of evergreen conifer trees is dependent on the crown ratio and foliar longevity. Variation in foliage longevity is one of the important traits that often favours the genus Pinus over its competitors. Healthy lodgepole pine trees throughout British Columbia, Canada typically retain needles for 4 to 5 years. Foliar diseases have a profound influence on foliar longevity and c...

The Northern Region of the Forest Service, US. Department ofAgricdture, has developed an efficient and consistent method fbr assessing cumulative effects of management practices on the soil and vegetation maurces it manages. Ecological classification and analysis constitute the basis ofthis method Sirtoe many of the management activitks in the Regton alter the present oegetatian of a site (and ...

In this paper I describe rural gentrificationöie the in-migration of relatively young, ex-urban members of the postindustrial middle class (PIMC)öin the northern Rocky Mountains as a form of `permanent tourism'. The colonization of previously industrial landscapesöie those created according to a regime that prioritizes the production/consumption of commoditiesöby the PIMC has led to the expansi...

T largest outbreak of Ebola virus continues unabated in West Africa. With the recent death of a patient with Ebola virus disease at a hospital in Dallas, Texas, and the sobering reality that nosocomial spread has occurred in a U.S. facility, U.S. medical centers are coming to grips with the need to prepare for care of patients with this devastating disease. The Centers for Disease Control and P...