The effect of detrital addition on the development of nanoflagellates and bacteria in Lake Kinneret |
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Authors: | Hadas O; Pinkas R; Albert-Diez C; Bloem J; Cappenberg T; Berman T |
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Institution: | Kinneret Limnological Laboratory PO Box 345, Tiberias, Israel 14102
1Vijverhof Laboratorium Rijksstraatweg 6, 3621 AC Nieuwersluis, The Netherlands |
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Abstract: | The effect of adding dissolved substrates derived from algalcells on the patterns of nutrient cycling and growth of bacteria,heterotrophic nanoflagellates (HNAN) and photoautotrophs wasdetermined in samples of near-surface waters from Lake Kinneret.Supplementation of substrates always resulted in an increasedpeak of HNAN numbers and had little effect on bacterial numbers.HNAN-mediated nutrient remineralization of nitrogen and phosphoruswas also stimulated. In light-incubated samples the remineralizednutrients were taken up by photoautotrophic cells. Maximum growthrates observed for HNAN ranged from 0.03 to 0.11 h1,clearance rates for bacteria 1.17.3 nl HNAN1 h1and remineralization rates 6.48.4 µg N mg dry wt1h1 and 0.370.99 µg P mg dry wt1 h1. |
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