Publication Repository

VERTICAL PROFILES OF BACTERIAL ABUNDANCE, PRODUCTIVITY AND GROWTH-RATES IN COASTAL SEDIMENTS OF THE CENTRAL GREAT-BARRIER-REEF LAGOON

Show simple item record

dc.contributor Australian Institute Of Marine Science (aims) en
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science
dc.contributor.author ALONGI, DM
dc.date.accessioned 2017-03-21T01:12:22Z
dc.date.accessioned 2013-02-28T06:47:18Z
dc.date.accessioned 2013-02-28T06:47:18Z
dc.date.accessioned 2019-05-09T01:10:35Z
dc.date.available 2017-03-21T01:12:22Z
dc.date.available 2013-02-28T06:47:18Z
dc.date.available 2013-02-28T06:47:18Z
dc.date.available 2019-05-09T01:10:35Z
dc.date.issued 1992-04-01
dc.identifier 2513 en
dc.identifier.citation Alongi DM (1992) Vertical profiles of bacterial abundance, productivity and growth rates in coastal sediments of the central Great Barrier Reef lagoon. Marine Biology. 112: 657-663. en
dc.identifier.issn 0025-3162
dc.identifier.uri http://epubs.aims.gov.au/11068/2513
dc.description Link to abstract/full text - http://dx.doi.org/10.1007/BF00346184 en
dc.description.abstract Vertical patterns of bacterial densities, productivity and specific growth rates in coastal muds, quartz sands and muddy sands of the central Great Barrier Reef lagoon were examined in summer (February) and autumn (May) 1988. Variations in these parameters with station location, sediment depth and season were complex, exhibiting significant main and interaction effects in most instances. Some trends were apparent despite the large and complex variations. Bacterial densities did not vary seasonally, ranging from 2.9 to 38.1 x 10(9) cells g-1 dry wt, averaged over sediment depth (0 to 20 cm) and seasons. Trend analysis revealed that densities decreased with increasing sediment depth. Bacterial production (tritiated thymidine incorporation into DNA) was high, ranging from 0.4 to 5.7 g C m-2 d-1 (integrated over 10 cm depth), as were specific growth rates (grand mean, mu = 0.25 d-1; range = 0.004 to 1.3 d-1). Both were generally higher in summer than in autumn. Vertical profiles of productivity and specific growth rates revealed actively growing bacterial assemblages down to 20 cm depth. Factors which may account for these very abundant and productive communities are: (1) subsurface accumulations of detritus exported from adjacent mangrove forests, and (2) physical disturbance from tidal scouring and severe climate (e.g. cyclones, wet-season floods). Disturbance events occur frequently enough to inhibit the development of highly sulphidic conditions, but stimulate production of bacterial types (aerobes, fermenters) capable of incorporating labelled thymidine into their DNA.
dc.description.uri http://dx.doi.org/10.1007/BF00346184 en
dc.language English
dc.language en en
dc.publisher Springer-Verlag en
dc.relation.ispartof Null
dc.relation.ispartof Marine Biology - pages: 112: 657-663 en
dc.subject Disturbance
dc.subject Marine & Freshwater Biology
dc.subject Marine-sediments
dc.subject Dna-synthesis
dc.subject Microbial Community
dc.subject Intertidal Sediments
dc.subject Shelf
dc.subject Tritiated-thymidine
dc.subject Biomass
dc.subject Organic-carbon
dc.subject Australia
dc.title VERTICAL PROFILES OF BACTERIAL ABUNDANCE, PRODUCTIVITY AND GROWTH-RATES IN COASTAL SEDIMENTS OF THE CENTRAL GREAT-BARRIER-REEF LAGOON
dc.type journal article en
dc.identifier.doi 10.1007/BF00346184 en
dc.identifier.wos WOS:A1992HR30600016


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Publication


Browse

My Account