Variability of Phosphorus Forms in Suspended Solids at the Lake Erie-Grand River Confluence
| Autor: | Tatiana Mayer, Philip G. Manning |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Hydrology
Total organic carbon geography Suspended solids geography.geographical_feature_category Ecology Phosphorus Sediment chemistry.chemical_element Estuary Aquatic Science Total inorganic carbon chemistry River mouth Environmental science Suspended load Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Great Lakes Research. 15:687-699 |
| ISSN: | 0380-1330 |
| DOI: | 10.1016/s0380-1330(89)71521-5 |
| Popis: | The forms of phosphorus and iron have been determined in suspended solids collected from within and off the Grand River estuary, Lake Erie, in August and October of 1985. Concentrations of organic and inorganic carbon, aluminum, and manganese were also measured. These chemical parameters were then used to assess the importance of processes such as input of stream solids, biological productivity, shoreline erosion, and lake sediment resuspension in regulating suspended solids composition in the studied area. Considerable spatial and temporal variation was found in the distribution of the measured parameters. Both total and bioavailable P (BAP) in suspended solids were higher in the summer than in the fall, BAP accounting for about 34.5% of total P in August and about 17.5% in October. The BAP distribution is consistent with the distribution of ferric ion, whereas apatite-P follows the distribution of aluminum and ferrous ion in chlorite and other clay minerals. The concentration of BAP is generally higher in the near-surface solids and increases with increasing distance from the river mouth. The seasonal and spatial trend in total P, BAP, organic carbon, and Fe3+ concentrations reveal that a large proportion of particulate P is associated with particles of biogenic origin, rather than inorganically bound to Fe oxides. The apatite-P, Al, and Fe2+ concentrations reveal the importance of sediment resuspension processes, within the distance of ∼4 km, particularly in the fall. The same parameters point to loss of terrigennous material of riverine origin and from the shoreline erosion within the short distance from the river mouth. |
| Databáze: | OpenAIRE |
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