Keywords

Aquatic weeds, Benthos, Freshwater ecology, Little Lake Barton

Abstract

Benthic macroinvertebrates and physicochemical parameters were monitored simultaneously with hydrilla in a central Florida lake. Changes in the benthos were described in relation to plant growth. Twenty-seven of the 54 taxa of benthic macroinvertebrates collected were members of the Family Chironomidae. Chironomids and oligochaetes numerically dominated the benthos, comprising of 82% of the individual collected. The greatest numbers of species and individuals were found during the winter when hydrilla biomass was low. Hydrilla biomass ranged from 0.385 kg/m2 in April, 1977 to 2.275 kg/m2 in October, 1977. Low numbers of species and individuals were collected from bottom sediments during summer and fall. Dissolved oxygen concentrations at the bottom were approximately 2.0 ppm during summer and fall and possibly limited benthic organisms. The annual means for the Shannon and Simpson Indices for the benthos were 1.92 and 0.36, respectively.

Notes

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Graduation Date

Winter 1980

Advisor

Osborne, John A.

Degree

Master of Science (M.S.)

College

College of Natural Sciences

Degree Program

Biology

Format

PDF

Pages

65 p.

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0013318

Included in

Biology Commons

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