World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Temporal Variations in Microbial Activities and Carbon Turnover in Subtidal Sandy Sediments : Volume 5, Issue 6 (06/11/2008)

By Böer, S. I.

Click here to view

Book Id: WPLBN0003991089
Format Type: PDF Article :
File Size: Pages 43
Reproduction Date: 2015

Title: Temporal Variations in Microbial Activities and Carbon Turnover in Subtidal Sandy Sediments : Volume 5, Issue 6 (06/11/2008)  
Author: Böer, S. I.
Volume: Vol. 5, Issue 6
Language: English
Subject: Science, Biogeosciences, Discussions
Collection: Periodicals: Journal and Magazine Collection
Subcollection: Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description: Microbial Habitat Group, Max Planck Institute for Marine Microbiology, Bremen, Germany. Temporal dynamics and vertical patterns in bacterial abundances and activities were studied in a shallow subtidal sand flat in the Sylt-Rømø Basin (North Frisian Wadden Sea, Germany.) Extracellular enzymatic activities, bacterial carbon production and community respiration showed strong (factor of 4–5) temporal variations that were mostly related to seasonal temperature change, but also to changes in substrate availability. These temporal patterns in activity were barely reflected in bacterial (200–400 mmol C m−2) and microphytobenthic biomass (800–1500 mmol C m−2) or the sedimentary carbohydrate inventory (1300–2900 mmol C m−2), suggesting that grazing controls the standing stocks of the microphytobenthic and bacterial assemblages. Despite their exposure to strong hydrodynamic forces such as tidal currents and wind-induced wave surge, the subtidal sandy sediments showed persistent vertical gradients in bacterial abundances, bacterial carbon production and extracellular enzymatic activities at all times. The vertical distribution of these parameters was tightly coupled to that of the microphytobenthos, dominated by diatoms. Despite the low organic carbon content typical for surge-exposed sandy sediments, high extracellular enzymatic activities and bacterial carbon production rates indicate a very active heterotrophic bacterial community, with a gross secondary productivity of 30–180 mmol C m−2, and a biomass turnover time of 2–18 days. Our data suggest that this high activity is supported by the rapid flux of carbohydrates from microphytobenthic primary productivity. Accordingly, the potential activities of enzymes hydrolyzing carbohydrates cover most of the total bacterial carbon demand during all seasons.

Temporal variations in microbial activities and carbon turnover in subtidal sandy sediments

Alderkamp, A C., van~Rijssel, M., and Bolhuis, H.: Characterization of marine bacteria and the activity of their enzyme systems involved in degradation of the algal storage glucan laminarin, FEMS Microbiol. Ecol., 59(1), 108–117, 2006.; Alongi, D M.: Vertical profiles of bacterial abundance, productivity and growth rates in coastal sediments of the central Great Barrier Reef lagoon, Mar. Biol., 112, 657–663, 1992.; Arnosti, C.: Measurement of depth- and site-related differences in polysaccharide hydrolysis rates in marine sediments, Geochim. Cosmochim. Ac., 59(20), 4247–4257, 1995.; Arnosti, C. and Holmer, M.: Carbon cycling in a continental margin sediment: contrasts between organic matter characteristics and remineralization rates and pathways, Estuar. Coast Shelf S., 58, 197–208, 2003.; Arnosti, C.: Fluorescent Derivatization of Polysaccharides and Carbohydrate-Containing Biopolymers for Measurement of Enzyme Activities in Complex Media, J. Chromatog. B, 793, 181–191, 2003.; Arnosti, C. and Jørgensen B B.: Organic carbon degradation in Arctic marine sediments, Svalbard: A comparison of initial and terminal steps, Geomicrobiol. J., 23, 551–563, 2006.; Asmus, R M., Jensen, M H., Murphy, D., and Doerffer, R.: Primary Production of Microphytobenthos, Phytoplankton and the Annual Yield of Macrophytic Biomass in the Sylt-Rømø Wadden Sea, in: Ökosystem Wattenmeer, edited by: Gätje, C. and Reise, K., Springer Verlag, Berlin, Germany, 367–392, 1998.; Créach, V., Baudoux, A C., Bertru, G., and Le Rouczic, B.: Direct estimate of active bacteria: CTC use and limitations, J. Microbiol. Meth., 52(1), 19–28, 2003.; Billerbeck, M., Werner, U., Polerecky, L., Walpersdorf, D., de Beer, D., and Huettel M.: Surficial and deep pore water circulation governs spatial and temporal scales of nutrient recycling in intertidal sand flat sediment, Mar. Ecol. Prog. Ser., 326, 61–76, 2006.; Billerbeck, M., Røy, H., Bosselmann, K., and Huettel, M.: Benthic photosynthesis in submerged Wadden Sea intertidal flats, Estuar. Coast Shelf S., 71(3–4), 704–716, 2007.; Boetius, A.: Microbial hydrolytic enzyme activities in deep-sea sediments, Helgoländer Meeresuntersuchungen, 49, 177–187, 1995.; Boetius, A. and Lochte, K.: Effect of organic enrichments on hydrolytic potentials and growth of bacteria in deep-sea sediments, Mar. Ecol.-Prog. Ser., 140, 239–250, 1996a.; Boetius, A. and Lochte, K.: High proteolytic activities of deep-sea bacteria from oligotrophic polar sediments, Arch. Hydrobiol. Spec. Issues Advanc. Limnol., 48, 269–276, 1996b.; Boudreau, B P., Huettel, M., Forster, S., Jahnke, R A., McLachlan, A., Middelburg, J J., Nielsen, P., Sansone, P., Taghon, G., Van~Raaphorst, W., Webster, I., Weslawski, J M., Wiberg, P., and Sundby, B.: Permeable marine sediments: Overturning an old paradigm, EOS, 82, 135–136, 2001.; Cahoon, L B.: The role of benthic microalgae in neritic ecosystems, in: Oceanogr Mar Biol Ann Rev, Vol 37, edited by: Ansell, A D., Gibson, R N., Barnes, M., Taylor and Francis, London, 47–86, 1999.; Canfield, D E., Jørgensen, B B., Fossing, H., Glud, R., Gundersen, J., Ramsing, N B., Thamdrup, B., Hansen, J W., Nielsen, L P., and Hall, P O J.: Pathways of organic carbon oxidation in three continental margin sediments, Mar. Geol., 113, 27–40, 1993.; Cook, P L M., Veuger, B., Böer, S., and Middelburg, J J.: Effect of nutrient availability on carbon and nitrogen incorporation and flows through benthic algae and bacteria in near-shore sandy sediment, Aquat. Microb. Ecol., 40, 165–180, 2007a.; Cook P L M., Wenzhöfer F., Glud R N., Janssen F., and Huettel M.: Benthic solute exchange and carbon mineralization in two shallow subtidal sandy sediments: Effect of advective pore-water exchange, Limnol. Oceanogr., 52(5), 1943–1963, 2007b.; Cramer, A.: Seasonal variation in benthic metabolic activity in a frontal system in the North Sea, in: Trophic relationships in the marine environment 1990, Proc. 24th Europ. Mar. Biol. Symp., edited by: Barnes, M. and G


Click To View

Additional Books

  • Influence of Elevated Co2 Concentrations... (by )
  • The Marine Sedimentary Nitrogen Isotope ... (by )
  • Mortality as a Key Driver of the Spatial... (by )
  • The Temperature Sensitivity of Organic M... (by )
  • Phytoplankton Blooms Induced/Sustained b... (by )
  • The Benthic Foraminiferal Community in a... (by )
  • Isoprene Emissions from a Tundra Ecosyst... (by )
  • Tracing the Transport of Colored Dissolv... (by )
  • Molecular Analysis of the Microbial Comm... (by )
  • Phosphorus Status of Soils from Contrast... (by )
  • Phytoplankton Calcification as an Effect... (by )
  • Microphytobenthos and Benthic MacRoalgae... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.