A taxonomic investigation of the algal flora of the Brigham Young University campus was conducted from October 1971 to August 1972. This algal flora consisted of 27 genera and 36 species of Chlorophyta, 2 genera and 2 species of Euglenophyta, 32 genera and 106 species of Bacillariophyceae (including 16 genera and 33 species of soil diatoms), 1 genus and 2 species of Chrysophyta excluding diatoms and 6 genera and 14 species of Cyanophyta. Diatoms were the predominent algae in this study. Chlorococcum humicola, Vaucheria geminata, Amphora normani, Hantzschia amphioxys and Oscillatoria sancta were prominent in the greenhouses. In the arboretum pond, Melosira varians, Synedra ulna var. subaegualis and Cymbella cistula were abundant in the winter whereas Spirogyra dubia, Spirogyra jugalis and Spirogyra porticalis grew throughout the year, especially in the late spring. Diatoma tenue var. elongatum, Diatoma vulgare, Cocconeis pediculus and Gomphonema parvulum were prominent stream algae in the early summer. Cladophora glomerata grew in large nmbers at stream site two in the winter.

Thesis (M. Sc.)--University of Hong Kong, 1973. / Typewritten.

During the summero f 1964 a taxonomica and ecological study was made of the desmids (microscopic green algae) found in Lily Lake. The study site is a subalpine lake in the Wasatch National Forest of the Uinta Mountains, Utah. The lake is located about one-half mile west of Trial Lake at an elevation of approximately 10,000 feet. The lake is an acidic, cold, lentic bog pond characteristic of this region. Desmids were collected at weekly intervals from seven sampling sites. The water temperature, pH, dissolved oxygen, light conditions and length of day from sunrise to sunset were recorded at the time of collection. Periphyton samples were obtained by scraping material from the stems and lower sides of leaves of water lilies, organic matter lying on the bottom of the lake, submerged logs and stems, dead sedge and grass leaves of the quaking peat, and organic matter of a floating peat mat. Surface samples were obtained by use of a plankton net. Small sheets of broken glass were suspended in the water as artificial habitats for desmid growth. There were 167 species collected representing seventeen genera of the family Desmidiaceae. Illustrations were made of every species collected. Ninety-four different species were found that have not been reported in Utah waters. The species were divided into five groups based on their percent frequency: (i) abundant (80-100%}, (ii) common(60- 79%), (iii) frequent (40-59), (iv) occasional (20-39%), and (v) scarce (5-19%). There were fourteen abundant species. four of these were observed in each to collection made: Buastrum Didelta, Triploceras gracile, Cosmarioum margaritiferum, and Xanthidium armatum var. fissum. There were twenty-two common species, twenty-four frequent species, forty-three occasional species, and sixty-four scarse species. Five genera contained the majority of species found. Cosmarium was represented with fifty one species; Closterium and Staurastrum each had twenty-five species; Micrasterias had sixteen species; and thirteen species were in the Euastrum genera. Xanthidium, Penium, Pleurotaenium, Arthrodesmus, Desmidium, Netrium, Triploceras, Hyalotheca, Sphaerozoama, Onychonema, Spondylosium and Gymnozyga were the remaining genera. There were thirty-seven species in this latter group. The natural habitats provided the best environment for the growth of desmids. Periphyton samples from the shallow water contained the largest number of species. Artificial habitats of glass sheets were especially favorable for the growth of Closterium lineatum, Closterium ralfsii var. hybridum and Closterium sp. (5). Few species were found free-floating where the lake was over six feet deep. As the pH, air, and water temperature increased during the growing season, the number of species collected increased, and as the water temperature decreased, oxygen increased, and the number of species collected decreased.

A quantitative and ecological study of the algal flora of Huntington Canyon, Emery Co., Utah was conducted from March 1971 to April 1972. Data were collected concerning net plankton, nannoplankton, periphyton and visible attached algae. Certain physical and chemical parameters in the waters of Huntington Creek and a small pond along its course also were measured. The algal flora of Huntington Canyon contains a wide diversity of genera and species. Diatoms are the main constituent of the flora of this stream throughout the year. Hydrurus foetidus is prevalent in the creek in Huntington Canyon from late winter to early summer, and filamentous blue-green algae abound in the summer and fall. Cladophora flomerata, Oedogonium sp., and Chara vulgaris are abundant in the creek beyond the mouth of the canyon. Most plankton in Huntington Creek originate on the substrate and in reservoirs. Huntington Creek is a cold, fast flowing, hard water mountain stream, and the algal flora of this creek is typical of such a habitat.

A taxonomic study of the algae of Huntington canyon, Emery County, Utah, was conducted from March 1971 to April 1972. The algal flora of this cold, fast-flowing, hard-water mountain creek consisted of ninety-five genera, one hundred ninety-six species, twenty-nine varieties, and two forms. This diverse flora was dominated by many different species with usually rather few individuals of Achnanthes, Cymbella, Diatoma, Gomphonema, Lyngbya, Navicula, Nitzschia, Oscillatoria, Synedra, and Ulothrix.