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Titolo:
AN EVALUATION OF PERIPHYTON COMMUNITY STRUCTURE AND FUNCTION ON TILE AND COBBLE SUBSTRATA IN EXPERIMENTAL STREAM MESOCOSMS
Autore:
LOWE RL; GUCKERT JB; BELANGER SE; DAVIDSON DH; JOHNSON DW;
Indirizzi:
BOWLING GREEN STATE UNIV,DEPT BIOL SCI BOWLING GREEN OH 43403 PROCTER & GAMBLE CO,IVORYDALE TECH CTR,DEPT ENVIRONM SCI CINCINNATI OH 45217
Titolo Testata:
Hydrobiologia
fascicolo: 2, volume: 328, anno: 1996,
pagine: 135 - 146
SICI:
0018-8158(1996)328:2<135:AEOPCS>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIATOM COMMUNITIES; ARTIFICIAL STREAMS; LABORATORY STREAMS; ALKYL SULFATE; ASSEMBLAGES; CHLOROPHYLL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
R.L. Lowe et al., "AN EVALUATION OF PERIPHYTON COMMUNITY STRUCTURE AND FUNCTION ON TILE AND COBBLE SUBSTRATA IN EXPERIMENTAL STREAM MESOCOSMS", Hydrobiologia, 328(2), 1996, pp. 135-146

Abstract

Periphyton communities are an ecologically important source of information when conducting experimental stream ecotoxicological studies. Experimental stream studies often utilize unreplicated systems in order to understand dose-response phenomena. The objective of this study wasto examine the robustness of such a dose-response investigation. Autotrophic and heterotrophic periphyton were evaluated in replicated control experimental streams with open recruitment (once-through flow design). Measurements of population and community structure and community function over an eleven week colonization period were made on unglazedclay tile and cobble substrata. Several measures were significantly different during the study; however, most of these were a result of initial stochastic colonization events or associated with relatively rarealgal populations. During the latter half of the study autotrophic and heterotrophic community measurements on tile and cobble substrata displayed similar trends in both control streams. Population and community metrics were significantly different for approximately 5% of the 400 measurements made after the initial sampling. These results stronglysuggest that the driving forces behind structuring aquatic populationand community responses will be test chemical exposure and not spuriously developed stream ecosystems with individual trajectories. Recruitment in these open systems is evenly distributed across the replicatedexperimental stream ecosystems.

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Documento generato il 29/03/20 alle ore 11:49:22