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Titolo:
MICROBIAL CONSORTIA IN WETLAND SEDIMENTS - A BIOMARKER ANALYSIS OF THE EFFECTS OF HYDROLOGICAL REGIME, VEGETATION AND SEASON ON BENTHIC MICROBES
Autore:
BOON PI; VIRTUE P; NICHOLS PD;
Indirizzi:
VICTORIA UNIV TECHNOL ST ALBANS,DEPT ENVIRONM MANAGEMENT,POB 14428,MCMC MELBOURNE VIC 8001 AUSTRALIA UNIV TASMANIA,ANTARCTIC COOPERAT RES CTR HOBART TAS 7000 AUSTRALIA CSIRO,DIV OCEANOG HOBART TAS 7000 AUSTRALIA
Titolo Testata:
Marine and freshwater research
fascicolo: 1, volume: 47, anno: 1996,
pagine: 27 - 41
SICI:
1323-1650(1996)47:1<27:MCIWS->2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
ICE DIATOM COMMUNITIES; FATTY-ACID BIOMARKERS; METHANOGENIC BACTERIA; ORGANIC-MATTER; ERGOSTEROL CONTENT; PADDY SOIL; BIOMASS; DECOMPOSITION; WATER; BIOGEOCHEMISTRY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
59
Recensione:
Indirizzi per estratti:
Citazione:
P.I. Boon et al., "MICROBIAL CONSORTIA IN WETLAND SEDIMENTS - A BIOMARKER ANALYSIS OF THE EFFECTS OF HYDROLOGICAL REGIME, VEGETATION AND SEASON ON BENTHIC MICROBES", Marine and freshwater research, 47(1), 1996, pp. 27-41

Abstract

Microbial consortia in the sediments from a permanent wetland near Albury-Wodonga in north-eastern Victoria, Australia (Ryans 1 Billabong),and an ephemeral wetland near Shepparton in central Victoria (Raftery's Swamp) were quantified by analyses of phospholipid fatty acid (PLFA), polar lipid ether lipid (PLEL), sterol and alcohol profiles. Prokaryotic organisms dominated the benthic assemblages in both wetlands, Total prokaryotic abundance (i,e. eubacteria plus archaea) was estimatedto be (7-17) x 10(9) cells g(-1) sediment (dry weight). Methanogenic archaea were estimated to number (1-5.4) x 10(9) cells g(-1) and to account for 11-35% of the total benthic prokaryotes; these values are apparently among the highest recorded for temperate lake or river environments, PLFAs indicative of specific metabolic groups (e.g. sulfate-reducing bacteria (SRB), methanotrophic bacteria, etc.) were also detected. The PLFA profiles indicated that Type I methanotrophs (abundant inC-16 PLFAs) were more abundant than the Type II group, which contain C-18 PLFAs. Acetate-utilizing SRB were more abundant than were lactate-utilizing SRB, but neither group was dominant. Ergosterol was not detected, which suggested that fungi were not a significant component of the benthic microbial consortia in spite of both wetlands having abundant inputs from aquatic and fringing vascular plants, Other biomarkers, such as sterols, long-chain alcohols, triterpenoids and phytol, demonstrated inputs from these higher plants. PLFA, PLEL and sterol profiles indicated that benthic microbial consortia were affected by hydrological regime, the presence of aquatic vegetation, and season. Information from this preliminary study may assist in the making of informed management decisions on environmental water allocations for natural ecosystems.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 22:32:34