Influence of the mineralogical composition on microbial activities in marine sediments: an experimental approach |
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| Authors: | Elena Manini Gian Marco Luna |
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| Institution: | 1. Institute of Marine Sciences, Coastal Ecosystems Section, CNR , Via Pola 4, Lesina (FG), Italy , 71010;2. University of Ancona, Department of Marine Sciences, Faculty of Sciences , Via Brecce Bianche, Monte D'Ago, Ancona, Italy , 60131e.manini@popcsi.unian.it;4. University of Ancona, Department of Marine Sciences, Faculty of Sciences , Via Brecce Bianche, Monte D'Ago, Ancona, Italy , 60131 |
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| Abstract: | We investigated the influence of the mineralogical composition of marine sediments on bacterial activity in experimental microcosms. Calcite and quartz were added to natural marine sediments and microbial response in terms of total bacterial abundance and biomass, β-D-glucosidase exo-enzymatic activity and bacterial incorporation of a radio-labelled (3H-leucine) substrate were investigated for a period of one month. We report here that after 15 days the mineralogical composition of the sediment (calcite vs. quartz) had an impact on bacterial abundance and activity (reduced for ca 15% and 56%, respectively). However, such impact was mitigated or even disappeared in high organic nutrient conditions. |
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| Keywords: | Bacterial activity Mineralogical composition Sediment |
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