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Titolo:
Dissolved organic carbon as an indicator of the scale of watershed influence on lakes and rivers
Autore:
Gergel, SE; Turner, MG; Kratz, TK;
Indirizzi:
Univ Wisconsin, Dept Zool, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 sin, Dept Zool, Madison, WI 53706 USA Univ Wisconsin, Ctr Limnol, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 in, Ctr Limnol, Madison, WI 53706 USA Univ Wisconsin, Ctr Limnol, Trout Lake Stn, Boulder Junction, WI 54512 USAUniv Wisconsin Boulder Junction WI USA 54512 ulder Junction, WI 54512 USA
Titolo Testata:
ECOLOGICAL APPLICATIONS
fascicolo: 4, volume: 9, anno: 1999,
pagine: 1377 - 1390
SICI:
1051-0761(199911)9:4<1377:DOCAAI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL ONTARIO LAKES; LAND-USE; PRECAMBRIAN SHIELD; SURFACE WATERS; MICROBIAL RESPIRATION; BACTERIAL PRODUCTION; STREAM WATER; FRESH-WATERS; BOREAL LAKES; NOVA-SCOTIA;
Keywords:
dissolved organic carbon; land cover; land use; spatial scale; water-sheds; wetlands; Wisconsin;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
108
Recensione:
Indirizzi per estratti:
Indirizzo: Gergel, SE Univ Wisconsin, Dept Zool, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 ool, Madison, WI 53706 USA
Citazione:
S.E. Gergel et al., "Dissolved organic carbon as an indicator of the scale of watershed influence on lakes and rivers", ECOL APPL, 9(4), 1999, pp. 1377-1390

Abstract

Land use and land cover can have a significant impact on water chemistry, but the spatial scales at which landscape attributes exert a detectable influence on aquatic systems are not well known. This study quantifies the extent of the landscape influence using the proportion of wetlands in the watershed measured at different distances to predict dissolved organic carbon (DOC) concentrations in Wisconsin lakes and rivers, and to determine whetherthe watershed influence varies with season or hydrologic type of lake. Theproportion of wetlands in the total watershed often explained the most variability of DOC in lakes when stepwise regression was used. However, best-model techniques revealed that, for lakes, r(2) values often only differed 1-3% between models using the proportion of wetlands in the total watershed and models using only the proportion of wetlands in nearshore riparian areas (25-100 m). In rivers, the proportion of wetlands in the watershed alwaysexplained considerably more of the variability in DOC than did the proportion of wetlands in the nearshore riparian zone. The watershed influence also varied seasonally in rivers, as the proportion of the watershed covered by wetlands explained more of the variability in DOC in the fall than in thespring. Overall, the proportion of wetlands in the landscape explained much more of the variability of DOC concentrations in rivers than in lakes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 10:00:08