Life Sciences Commons^™

Ecological Relationships Of Accipiters In Northern Utah - With Special Emphasis On The Effects Of Human Disturbance, Stephen P. Hennessy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the effect of habitat parameters and human disturbance on the nesting success of goshawks, Cooper's hawks, and sharp-shinned hawks in an area within the Cache National Forest of Utah and Idaho. This research should provide the wildlife manager with information of value in planning recreation areas, roads, timber cuttings, and other activities where impacts are considered.

Of the three accipiter species studied, the goshawk showed the greatest preference for isolation from man. It nested at higher elevations (X=2,065 m); farther from human disturbance (X=250 m); higher in trees …

The Effect Of Various Environmental Factors On The Growth Of A Red Pigmented Dunaliella Species From The Great Salt Lake, Sam Oeun May

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A red, obligately halophilic Dunaliella species believed to be D. salina was isolated from the North Arm of the Great Salt Lake, Utah, and its optimum growth conditions were determined.

The red pigmented Dunaliella species required an optimum NaCl concentration of 10%, temperature 28°C, and an illuminance of 7500 lux. Ammonium carbonate was preferred over potassium nitrate and ammonium chloride. Potassium nitrate was preferred over ammonium chloride. The average division (generation) time under the above conditions was 46.5 hours.

The alga grown in ammonium carbonate showed a lower content of chlorophyll a compared to those grown in potassium nitrate and …