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Titolo:
Cumulative effects of pulp mill and municipal effluents on epilithic biomass and nutrient limitation in a large northern river ecosystem
Autore:
Scrimgeour, GJ; Chambers, PA;
Indirizzi:
Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada Univ Alberta Edmonton AB Canada T6G 2E9 Sci, Edmonton, AB T6G 2E9, Canada Natl Water Res Inst, Saskatoon, SK S7N 3H5, Canada Natl Water Res Inst Saskatoon SK Canada S7N 3H5 atoon, SK S7N 3H5, Canada
Titolo Testata:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
fascicolo: 7, volume: 57, anno: 2000,
pagine: 1342 - 1354
SICI:
0706-652X(200007)57:7<1342:CEOPMA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROWTH-RATE RESPONSES; ALGAL BIOMASS; STREAMS; ENRICHMENT; PHYTOPLANKTON; COMMUNITIES; TRIBUTARIES; PATTERNS; LAKES; LIGHT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Scrimgeour, GJ Alberta Res Council, Forest Resources Business Grp, POB 4000, Vegreville, AB T9C 1T4, Canada Alberta Res Council POB 4000 Vegreville AB Canada T9C 1T4 a
Citazione:
G.J. Scrimgeour e P.A. Chambers, "Cumulative effects of pulp mill and municipal effluents on epilithic biomass and nutrient limitation in a large northern river ecosystem", CAN J FISH, 57(7), 2000, pp. 1342-1354

Abstract

Large-scale patterns in epilithic biomass and nutrient status were evaluated at 33 sites located upstream and downstream of point-source anthropogenic effluents in the Athabasca and Wapiti-Smoky rivers in Alberta, Canada. Multiple regression showed that epilithic chlorophyll a was significantly (p < 0.0001) related to concentrations of dissolved inorganic nitrogen and marginally (p = 0.06) significantly related to soluble reactive phosphorus. Epilithic biomass was up to 50 times higher immediately downstream of point-source inputs compared with sites upstream and those 20-150 km downstream. Data from nutrient diffusing substrata showed that the epilithon at 18 of the 33 sites was nutrient limited, while 14 sites showed no nutrient limitation; interpretation of the remaining site was inconclusive. Of the 18 nutrient-limited sites, six were nitrogen limited, five were phosphorus limited, and seven were co-limited. Multiple discriminant function analysis showed that the combined concentration of soluble reactive phosphorus and dissolvedinorganic nitrogen was a significant discriminator between deplete and replete sites.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 08:26:24