Hyporheic Biofilm Particulate Organic Carbon in a Small Lowland Stream (Sitka, Czech Republic): Structure and Distribution

✍ Scribed by Jan Koutný; Martin Rulík

• Book ID: 102283547
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 154 KB
• Volume: 92
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.200610989

✦ Synopsis

Abstract

Bacterial abundance, biomass and particulate organic carbon (POC) were determined in the hyporheic sediments <1 mm. The fine fraction (<0.063 mm) and coarse fraction (0.063–1 mm) were analysed separately. The coarse fraction was dominant (95.5%) and its POC content contributed the major proportion (on average 65%) of the total POC (TPOC). The changes in spatial distribution of TPOC were due to the variation in POC in the fine fraction. Bacteria in the fine fraction contributed on average to 62.9% of the total bacterial abundance and to 51.7% of the total bacterial biomass, despite the fact that the fine fraction represented only ∼4.5% of the sediment <1 mm. Our results stress the importance of the fine sediment fraction for bacteria as well as for spatio‐temporal distribution of biofilm POC. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)