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Titolo:
METABOLIC CHANGES ASSOCIATED WITH BIOFILM FORMATION IN AN UNDISTURBEDMEDITERRANEAN STREAM
Autore:
SABATER S; ROMANI AM;
Indirizzi:
UNIV BARCELONA,FAC BIOL,DEPT ECOL,AVGDA DIAGONAL 645 E-08028 BARCELONA SPAIN
Titolo Testata:
Hydrobiologia
fascicolo: 2, volume: 335, anno: 1996,
pagine: 107 - 113
SICI:
0018-8158(1996)335:2<107:MCAWBF>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSPORT SYSTEM ACTIVITY; PERIPHYTON COMMUNITIES; RIVER BIOFILMS; NUTRIENT; BACTERIA; MATRIX; WATER; ALGAE;
Keywords:
BIOFILM; STREAM; COLONIZATION; PHOTOSYNTHETIC ACTIVITY; ECTOENZYMES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
S. Sabater e A.M. Romani, "METABOLIC CHANGES ASSOCIATED WITH BIOFILM FORMATION IN AN UNDISTURBEDMEDITERRANEAN STREAM", Hydrobiologia, 335(2), 1996, pp. 107-113

Abstract

Respiratory activity (ETS), ectoenzymatic activity (beta-glucosidase and beta-xylosidase) and photosynthetic C-14-bicarbonate incorporationin the biofilm were measured in a shaded stream during a colonizationsequence (43 days) on artificial substrates (unglazed clay tiles) andcompared with older (aged) tiles. In the first five days bacterial densities and ectoenzyme activities showed a sharp increase. After two weeks, algal density, chlorophyll and productivity increased moderately. Chlorophyll did not reach similar values to those of the aged biofilms until the last day of colonization. Photosynthetic activity seemed to be relevant to the heterotrophs metabolism during substrate colonization, as could be deduced from the significant correlation between beta-glucosidase and C-14-bicarbonate incorporation, algal cell densities and chlorophyll. Respiratory activity (ETS) decreased in the older biofilms, accordingly to their higher algal and bacterial density. Younger biofilms (up to 8 days old) showed higher ETS activity per cell, indicating a fast response of microorganisms to substrate availability.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:17:49