Winter Anomalies of Seston, Phytoplankton and Cations in a Colorado (U.S.A.) Alpine Flowage Lake
✍ Scribed by Scott J. Heermann
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 933 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Abstract
Year‐round changes of phytoplankton, organic and inorganic seston, and dissolved and suspended concentrations of Ca, Mg, Na, K, Fe, Mn, Zn, and Cu were studied and correlated in Long Lake, an ultra‐oligotrophic alpine flowage lake of northcentral Colorado, U.S.A. Dissolved cation levels for Ca, Mg, Na, K, Mn, and Fe, both sestonic fractions and phytoplankton densities reached and sustained a maximum during April and May under heavy cover of ice and snow, and a minimum during open‐season from mid‐June to mid‐October. Rates of monthly water renewal varied greatly with a low of 0.28 turnovers in April and a high of 15.37 turnovers in June. Massive flushing in June and July reduced dissolved Fe levels to <0.060 mg/l from a typical maxima >8.0 mg/l in April and May. Tests for linear correlation between the various cations, sestonic fractions and phytoplankton showed in most cases positive and significant (p <.05) relationships. For most dissolved Fe and Mn pairings with phytoplankton and seston exceptionally significant (p < 0.001) relationships were observed.