Library Open Repository

Bacterial diversity in organically-enriched fish farm sediments

Downloads

Downloads per month over past year

Bissett, A and Bowman, JP and Burke, C (2006) Bacterial diversity in organically-enriched fish farm sediments. FEMS Microbiology Ecology, 55 (1). pp. 48-56. ISSN 0168-6496

[img] PDF
Bacterial_Diversity_fishfarms06.pdf | Download (126kB)
Full text restricted
Available under University of Tasmania Standard License.

Abstract

The bacterial diversity and community structure within both organically enriched and adjacent, unimpacted, near-shore marine sediments at two fish farms in southern Tasmania, Australia, was examined using 16S rRNA gene clone library construction and analysis. Sediments at both caged and reference sites at both farms showed a very high level of microbial diversity. Over 900 clones were analysed and grouped into 631 unique phylotypes. Reference sites were dominated by Delta- and Gammaproteobacteria and the Cytophaga-Flavobacteria-Bacteroides group. Cage site sediments were also dominated by these phylotypes, as well as members of the Alpha- and Epsilonproteobacteria. Diversity and coverage indices indicated that the actual diversity of the sediments was much greater than that detected, despite a large sampling effort. All libraries were shown to be statistically different from one another (P<0.05). Many phylotypes did not group with cultured bacteria, but grouped with other environmental clones from a wide array of marine benthic environments. Diversity and evenness indices suggested that although both parameters changed after farming, diverse communities were present in all sediments. The response of the microbial community to organic load suggested that random, rather than predictable, succession events determine community composition and diversity, and that sediment type may influence bacterial community and sediment response to organic perturbation.

Item Type: Article
Keywords: sediment microbiology, fish farm
Journal or Publication Title: FEMS Microbiology Ecology
Page Range: pp. 48-56
ISSN: 0168-6496
Identification Number - DOI: 10.1111/j.1574-6941.2005.00012.x
Additional Information: The definitive version is available at www.blackwell-synergy.com
Date Deposited: 12 Sep 2007
Last Modified: 18 Nov 2014 03:22
URI: http://eprints.utas.edu.au/id/eprint/1901
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page