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Titolo:
DISTURBANCE BY AQUATIC PLANT MANAGEMENT IN STREAMS - EFFECTS ON BENTHIC INVERTEBRATES
Autore:
KAENEL BR; MATTHAEI CD; UEHLINGER U;
Indirizzi:
SWISS FED INST ENVIRONM SCI & TECHNOL,DEPT LIMNOL,EAWAG CH-8600 DUBENDORF SWITZERLAND
Titolo Testata:
Regulated rivers
fascicolo: 4, volume: 14, anno: 1998,
pagine: 341 - 356
SICI:
0886-9375(1998)14:4<341:DBAPMI>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMUNITY-WIDE PATTERNS; SWISS PREALPINE RIVER; FRESH-WATER; MACROINVERTEBRATE COMMUNITIES; CHALK STREAMS; MACROPHYTES; RECOLONIZATION; STATISTICS; IMPACT; MARINE;
Keywords:
MACROPHYTES; AQUATIC PLANT MANAGEMENT; INVERTEBRATES; DISTURBANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
B.R. Kaenel et al., "DISTURBANCE BY AQUATIC PLANT MANAGEMENT IN STREAMS - EFFECTS ON BENTHIC INVERTEBRATES", Regulated rivers, 14(4), 1998, pp. 341-356

Abstract

The effect of aquatic plant removal on benthic invertebrates and their habitat was studied in two macrophyte-rich streams of the Swiss Plateau. In each stream, habitat conditions (macrophyte biomass, current velocity, water depth) and invertebrate densities were monitored in a control reach and in a reach where plants were removed by cutting. Biological samples were taken and physical parameters measured on three dates before and six dates after plant removal in both reaches. Responses to plant removal were similar in both streams; macrophyte cutting initially decreased mean plant biomass (ca. 85%) and total number of invertebrates (ca. 65%). Variation between replicates was, however, higher in one of the streams, causing fewer effects on plants and invertebrates to be statistically significant. Plant cutting affected mainly taxa that used macrophytes as habitat (e.g. Simuliidae, Chironomidae), whereas highly mobile taxa (e.g. Ephemeroptera) and taxa living on or within the bed sediments (e.g. Trichoptera, Bivalvia) were less affected. Taxa that decreased after plant removal recovered within 4-6 months, although recovery of macrophytes was quite different in both streams. Invertebrate recovery also seemed to be seasonally dependent, with cutting having a less severe impact during summer than spring. Our results suggest that macrophytes in streams should be removed only in summer, preferably leaving some plant beds to act as refugia for phytophilous invertebrates. (C) 1998 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 03:22:10