Document Type

Article

Publication Date

1974

Publication Title

Journal of Phycology

Volume

10

First page number:

323

Last page number:

331

Abstract

Phytoplankton samples were collected in Lake Mend 6 times from September 1910 to June 1971 for 8 stations at depths of 0. 3, 5, 10, 20, and 30 m. These samples were processed through a Millipore filter apparatus and 79 planktonic algae were identified. Algal divisions represented were Bacillariophyta, 42 species; Chlorophyta, 18 ; Cyanophyta, 9; Chrysophyta, 3; Cryptophyta, 3; Pyrrophyta, 2; and Euglenophyta, 2. Blue-green algae were dominant in late summer and fall; green algae, diatoms, and, cryptomonads in winter; and green algae in spring. The early summer flora was best represented by the Chlorophyta, Cryptophyta, and Chrysophyta. Palmer's pollution-tolerant algae indices and Nygaard's indices were calculated from phytoplankton data. These indices suggest eutropic conditions in Lake Mead, especially for Boulder Basin.

Keywords

Algae; Hydrobiology; Lake Mead (Ariz. and Nev.); Phytoplankton; Water quality

Disciplines

Biochemistry | Environmental Indicators and Impact Assessment | Environmental Microbiology and Microbial Ecology | Environmental Monitoring | Fresh Water Studies | Terrestrial and Aquatic Ecology

Language

English