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Ecology of Submersed Aquatic Weeds in South Florida Canals

Published online by Cambridge University Press:  12 June 2017

R. D. Blackburn ,
P. F. White  and
L. W. Weldon
R. D. Blackburn
Affiliation:
CRD, ARS, USDA, Fort Lauderdale, Florida
P. F. White
Affiliation:
Botany Department, Polk Junior College, Bartow, Florida
L. W. Weldon
Affiliation:
CRD, ARS, USDA, Fort Lauderdale, Florida
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Abstract

A 3-year ecological study of physical, chemical, and biological factors affecting the growth of submersed aquatic weeds was conducted in four irrigation and drainage canals in south Florida. Growth of aquatic vegetation was influenced by light intensity which decreased in a geometric ratio to water depth. The light penetration into the water was influenced by dissolved coloring matter and turbidity. A high concentration of nitrogen was found in three of the canals. Nitrogen entered the canals as sewage effluent discharged into the water and as fertilizer runoff from surrounding farmland. Density of aquatic vegetation harvested at intervals of 6 months from clipped plots varied from zero in a newly dug canal to 22,000 lb green weight/A in an old established canal. During the 3-year study, there was a complete shift of the vegetation from southern naiad (Najas guadalupensis (Spreng.) Magnus) to Florida elodea (Hydrilla verticillata Casp.) in two of the canals, but there was no change in plant species in two canals. No other chemical and physical factors evaluated in the study limited submersed aquatic weed growth in these canals.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 2 , April 1968 , pp. 261 - 266
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. American Public Health Association. 1955. Standard Methods for Examination of Water and Sewage. 10th ed. Am. Pub. Health Assoc. New York, N. Y. 626 p.Google Scholar
2. Blackburn, R. D., Lawrence, J. M., and Davis, D. E. 1961. Effects of light intensity and quality on the growth of Elodea densa and Heteranthera dubia . Weeds 9:251–257.Google Scholar
3. Juday, C. 1934. The depth distribution of some aquatic plants Ecology 15:325–331.Google Scholar
4. Manning, W. M., Juday, C., and Wolf, M. 1938. Photosynthesis of aquatic plants at different depths in Trout Lake, Wisconsin. Acad. Sci. 31:377–385.Google Scholar
5. Meyer, B. S. and Heritage, A. C. 1941. Effect of turbidity and depth of immersion on apparent photosynthesis in Ceratophyllum demersum . Ecology 22:17–22.CrossRefGoogle Scholar
6. Meyer, B. S., Bell, F. H., Thompson, L. C., and Clay, E. I. 1943. Effects of depth of immersion on apparent photosynthesis in submersed vascular aquatics. Ecology 24:393–399.Google Scholar
7. Odum, H. T. 1956. Trophic structure and productivity of Silver Springs, Florida. Ecol. Monogr. 27:55–112.Google Scholar
8. Pearsall, W. H. and Hewitt, T. 1933. Light penetration into fresh water. II. Light penetration and changes in vegetation limits in Windermere. J. Exp. Biol. 10:306–315.Google Scholar
9. Pearsall, W. H. and Ullyott, P. 1935. Light penetration into fresh water. III. Seasonal variations in the light conditions in Windermere in relation to vegetation. J. Exp. Biol. 11:89–103.CrossRefGoogle Scholar
10. Reid, G. K. 1961. Ecology of Inland Waters and Estuaries. Reinhold Publishing Corp., New York, N. Y. 375 p.Google Scholar
11. Schomer, H. A. 1934. Photosynthesis of water plants at various depths in the lakes of northeastern Wisconsin. Ecology 15:217–218.Google Scholar
12. Steenis, J. H. 1932. Lakes of Sawyer County. Wisconsin Dept. Agr. and Markets Bulletin No. 138. 53 p.Google Scholar
13. Welch, P. S. 1948. Limnological Methods. Blakiston Co., New York, N. Y. 381 p.Google Scholar
14. Wilkinson, R. E. 1963. Effects of light intensity and temperature on the growth of waterstargrass, coontail, and duckweed. Weeds 11:287–290.Google Scholar