Thesis - Open Access
Master of Science (MS)
Benthos samples were collected in Lake Poinsett, a highly eutrophic eastern South Dakota lake, from March 1970 through February 1971. The lake bottom was divided into three substrate types (sand, sand-sapropel mixture and sapropel) and the percent of each substrate type was calculated. Nineteen macroscopic genera were taken from ten sampling stations located throughout the lake. Descriptions are presented for organisms in this group. Diversity of organisms was greatest in the sand substrates, in that all 19 genera were collected. Chironomus spp. (Chironomus plomosus, Chironomus attenuates and six unidentified species) was the most abundant group of organisms and occurred most frequently in the sapropel (mud) substrate. Forty percent (514.2/m2) of mean annual numbers and 77% (0.9961 gm/m2) of mean annual dry weight from all substrates consisted of organisms from these eight species of Chironomus. The mean annual standing crop (1.28 gm/m2) in Lake Poinsett was approximately average in comparison to other lakes.
Library of Congress Subject Headings
Lake Poinsett (S.D.)
Includes bibliographical references (pages 43-45)
Number of Pages
South Dakota State University
Smith, Stephen B., "Macroscopic Benthos Populations and Taxonomy of the Family Chironomidae in Lake Poinsett, South Dakota" (1971). Theses and Dissertations. 237.