Laboratory scale enclosure: concept, construction and operation |
| |
Authors: | Rijkeboer Machteld; de Bles Frans; Gons Herman J |
| |
Institution: | Limnological Institute, Vijverhof Laboratory Rijksstraatweg 6, 3631 AC Nieuwersluis, The Netherlands |
| |
Abstract: | A laboratory scale enclosure (LSE) was devised for studyingthe seston dynamics in shallow, wind-mixed lakes. The LSE isa continuous flow system suitable for mass balance studies oflake water columns, and for cultivation of phytoplankton speciesas a reference for potential growth at the lake's light andmixing regime. The construction of the LSE is described in detail.Results are given on the operation with water from Lake Loosdrecht(The Netherlands). The coefficient of vertical mixing in theLSE was variable from 7.6 to 25.6 cm2 s1, i.e. similarto values reported for shallow, wind-exposed lakes. On average,the vertical light attenuation and the spectral changes withdepth in the LSE agreed well with the in situ underwater lightclimate. Mass balances for phosphorus and oxygen could be accuratelyestablished, while the loss of paniculate matter due to settlingand wall growth was insignificant. The LSE may also be appliedas an incubator for primary production measurements in a naturallight gradient and allowed prolonged continuous cultivationof Prochlorothrix hollandica. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|