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Medientyp:
E-Artikel
Titel:
Contribution by Snow to the Nutrient Budget of Some Small Northwest Ontario Lakes
Beteiligte:
Barica, Jan;
Armstrong, F. A. J.
Erschienen:
American Society of Limnology and Oceanography, 1971
Erschienen in:Limnology and Oceanography
Sprache:
Englisch
ISSN:
0024-3590
Entstehung:
Anmerkungen:
Beschreibung:
<p>Nutrient elements accumulated in snow and ice on the surface of two oligotrophic northwest Ontario lakes during winter amounted to 264 mg particulate and 282 mg soluble C, 15.5 mg particulate and 43 mg soluble N, with 1.3 mg particulate and 2.7 mg soluble P per m<sup>2</sup>of the lake area. From 61-92% of this material came from snowfall and the remainder from the lake water by seepage through the ice and refreezing. These nutrients enter the lakes on thawing in spring and are then available for growth of phytoplankton. They represent a significant fraction of the nutrient budget of the lakes. Trace amounts of Ca, Mg, Na, K, Cl, and SO<sub>4</sub>were also found in the snow-ice cover, in quantities roughly a 10th of those in the lakes. The distribution of soluble and particulate matter in snow and ice varied somewhat from place to place and with time, and showed stratification. The processes of seepage, slush formation, and freezing to form layered ice and snow cover are described.</p>