Effects of altering streambed material size on a specific measure of biological diversity
| Autor: | H. D. Ayers, W. T. Dickinson, I. D. Macnab, P. S. Chisholm |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Pollution
Hydrology media_common.quotation_subject Biodiversity Environmental engineering Sampling (statistics) Reynolds number Aquatic animal STREAMS symbols.namesake Average size Froude number symbols Environmental science General Environmental Science Civil and Structural Engineering media_common |
| Zdroj: | Canadian Journal of Civil Engineering. 3:563-570 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/l76-060 |
| Popis: | A study of the relationship between hydraulic characteristics of streams and selected aquatic animal populations was undertaken in the Blue Springs Creek. The Blue Springs Creek is unregulated, free of evidence of pollution, and is an International Hydrologic Decade Representative Basin.The study included two phases of investigation. The preliminary phase involved the collection of field data on aquatic animal populations and hydraulic characteristics at selected stream sampling locations. These data were analyzed to determine the influence of specific hydraulic characteristics upon the animal populations sampled. It was found that the average size (D50) of streambed material has an important influence on the animal populations studied. It was also concluded that the animal populations sampled were not significantly dependent upon values of Reynolds Number, Froude Number, temperature, relative roughness, and average velocity of flow determined from study data.These preliminary results were tested during the second phase of the study. Data for the tests were obtained by altering streambed material size at selected sampling locations. The tests showed that an increase in average size of streambed material resulted in an increase in biological diversity index at a point. Conversely a decrease in the biological diversity index at a point resulted from a decrease in the average size of streambed material. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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