Keywords
Aquatic weeds, Benthos, Freshwater ecology, Little Lake Barton, Hydrilla biomass seasonal variation, Benthic macroinvertebrate community structure, Low bottom dissolved oxygen (hypoxia), Chironomidae and Oligochaeta dominance, Diversity indices (Shannon, Simpson)
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
Pages
65 pages
Language
English
Rights
Public Domain
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
Identifier
DP0013318
Subjects
Benthos--Effect of water quality on; Benthic animals--Effect of habitat modification on; Hydrilla--Growth; Chironomidae--Monitoring; Freshwater invertebrates--Ecology
STARS Citation
Scott, Stefani L., "Benthic Macroinvertebrates in a Hydrilla Infested Central Florida Lake" (1980). Retrospective Theses and Dissertations. 515.
https://stars.library.ucf.edu/rtd/515
Contributor (Linked data)
Accessibility Status
Searchable text