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Titolo:
Natural variability of carbon dioxide and net epilimnetic production in the surface waters of boreal lakes of different sizes
Autore:
Kelly, CA; Fee, E; Ramlal, PS; Rudd, JWM; Hesslein, RH; Anema, C; Schindler, EU;
Indirizzi:
Univ Manitoba, Dept Microbiol, Winnipeg, MB R3T 2N2, Canada Univ ManitobaWinnipeg MB Canada R3T 2N2 ol, Winnipeg, MB R3T 2N2, Canada Fisheries & Oceans Canada, Inst Freshwater, Winnipeg, MB R3T 2N6, Canada Fisheries & Oceans Canada Winnipeg MB Canada R3T 2N6 , MB R3T 2N6, Canada
Titolo Testata:
LIMNOLOGY AND OCEANOGRAPHY
fascicolo: 5, volume: 46, anno: 2001,
pagine: 1054 - 1064
SICI:
0024-3590(200107)46:5<1054:NVOCDA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECAMBRIAN SHIELD LAKES; DISSOLVED ORGANIC-CARBON; INORGANIC CARBON; GREENHOUSE GASES; WHOLE-LAKE; ATMOSPHERE; CO2; PHOTOSYNTHESIS; PHYTOPLANKTON; EXCHANGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Kelly, CA Fisheries & Oceans Canada, Inst Freshwater, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada Fisheries & Oceans Canada 501 Univ Crescent Winnipeg MB Canada R3T 2N6
Citazione:
C.A. Kelly et al., "Natural variability of carbon dioxide and net epilimnetic production in the surface waters of boreal lakes of different sizes", LIMN OCEAN, 46(5), 2001, pp. 1054-1064

Abstract

The variability of surface water carbon dioxide concentration, or partial pressure (pCO(2)) was studied in 11 lakes of greatly varying size (2.4 ha up to 8 million ha) in Northwest Ontario, Canada. Six of these lakes were chosen to be as similar as possible in all respects except surface area (the Northwest Ontario Lake Size Series [NOLSS], which range from 88 to 35,000 ha). Spatial and temporal variability of pCO(2) within a single lake was no greater in the larger lakes than in the smaller lakes. Interannual variability was significant and synchronous, which indicates that weather patterns were important and affected the different lakes within the region in a similar manner. However, annual pCO(2) averages were not related to annual differences in planktonic photosynthetic activity, measured by (CO2)-C-14 fixation. In the six NOLSS lakes, there was not a significant relationship of average pCO(2) with lake size. For all 11 lakes, however, there was a significant negative correlation of pCO(2) with lake size, which was likely due toseveral characteristics of the very small and very large lakes that covaried with size. The larger lakes were deeper and had longer water residence times and lower DOC, which suggests lower CO2 production from allochthonous organic carbon inputs. Also, the ratio of epilimnetic sediment area/epilimnetic volume (A(e)V(e)) was smaller in the larger lakes, which likely resulted in lower rates of recycling of fixed carbon to CO2 during summer stratification.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 08:23:14