Theses and Dissertations

Title: Relationships between the chemical composition of aquatic plants and water quality

Name: Denton, Jerry Blain

Degree: MS

Chair: Dr. John M. Lawrence

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1966

Pages: 78

Keywords: Chemical Composition,Aquatic Plants,Water Quality.


Twenty-one species of aquatic plants were sampled periodically and analyzed for ash, carbon, nitrogen, phosphorus, calcium, magnesium, potassium, sodium, iron, manganese, zinc, and copper. Water and bottom soil samples from the collection sites were also analyzed for the same elements. Three of these plant species (alligatorweed, Alternanthera philoxeroides Mart.: parrotfeather, Myriophyllum brasiliense Camb.: and waterhyacinth, Eichhornia crassipes Solms) collected from polluted and non-polluted waters were compared for chemical composition. Plant tissue analyses indicated corresponding increases in magnesium, potassium, sodium, manganese, and copper with increased concentration of these elements in water. A corresponding decreased in zinc content of plant tissue was observed with an increased concentration of zinc in water. Of the three species analyzed, waterhyacinth appeared to be the most efficient plant in extracting nutrients from water. The tendency of plant shoots to concentrate calcium was observed while plant roots tended to concentrate iron and copper. The C:N ratio of many species was well below the average C:N ratio of legumes.

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