Significance of dissolved organic carbon in the prediction of thermocline depth in small Canadian shield lakes

被引：79
作者：
Pérez-Fuentetaja A. [1 ,3 ]
Dillon P.J. [2 ]
Yan N.D. [2 ]
McQueen D.J. [1 ]
机构：
[1] Department of Biology, York University, 4700 Keele Street, Toronto
[2] Ontario Ministry of the Environment, Dorset Research Centre, Bellwood Acres Road, Dorset
[3] Alaska Department of Fish and Game, 211 Mission Rd., Kodiak
来源：
Aquatic Ecology | 1999年 / 33卷 / 2期
关键词：
DOC; Dystrophic; Fetch; Humic; Light; Oligotrophic; Thermocline;
D O I：
10.1023/A:1009998118504
中图分类号：
学科分类号：
摘要：
Empirical models used to predict thermocline depths of lakes have typically been based on physical and morphometric variables. However, lakes with appreciable levels of dissolved organic material, including those found on the Canadian Precambrian Shield (DOC levels 1.4-12.41 mg l-1), have seldom been included in these models. Our analysis suggests that for such lakes, thermocline depth is linked strongly to light penetration (Secchi depth r = 0.83, light extinction r = -0.85) which is strongly related to DOC concentration (Secchi depth r = -0.91, light extinction r = 0.97). A multivariate regression based on small Canadian Shield lakes suggests that DOC is the most important predictor of thermocline depth. Maximum effective length, maximum depth, and chlorophyll a contribute significantly to the prediction power of the regression model, but are of secondary importance in the presence of DOC.
引用
收藏
页码：127 / 133
页数：6
相关论文
共 23 条
  • [1] Arai, T., Climatic and geomorphological influences on lake temperature (1981) Verh Int Verein Limnol, 21, pp. 130-134
  • [2] Bukaveckas, P.A., Driscoll, C.T., Effects of whole-lake base addition on thermal stratification in three acidic Adirondack lakes (1991) Water Air Soil Pollut, 59, pp. 23-39
  • [3] Bukaveckas, P.A., Driscoll, C.T., Effects of whole-lake base addition on the optical properties of three clearwater acidic lakes (1991) Can J Fish Aquat Sci, 48, pp. 1030-1040
  • [4] Devito, K.J., Dillon, P.J., Lazerte, B.D., Phosphorus and nitrogen retention in five Precambrian Shield wetlands (1989) Biogeochem, 8, pp. 185-204
  • [5] Dillon, P.J., Molot, A.J., Effect of landscape form on the export of dissolved organic carbon, iron and phosphorus from forested catchments (1997) Water Resources Research, 33, pp. 2591-2595
  • [6] Dillon, P.J., Nicholls, K.H., Locke, B.A., De Grosbois, E., Yan, N., Phosphorus-phytoplankton relationships in nutrient-poor soft-water lakes in Canada (1988) Verh Int Verein Limnol, 23, pp. 258-264
  • [7] Fee, E.J., Schindler, E.U., Shearer, J.A., Debruyn, E.R., De-Clercq, D.R., Light attenuation in the mixed-layer of lakes in the Experimental Lakes Area, 1969-1990 data (1991) Can Data Rep Fish Aquat Sci, 850. , IV+59 pp
  • [8] Fee, E.J., Hecky, R.E., Kasian, S.E.M., Cruikshank, D.R., Effects of lake size, water clarity, and climatic variability on mixing depths in Canadian Shield lakes (1996) Limnol Oceanogr, 41, pp. 912-920
  • [9] Gorham, E., Boyce, F.M., Influence of lake surface area and depth upon thermal stratification and the depth of the summer thermodine (1989) Great Lakes Res., 15, pp. 233-245
  • [10] Green, J.D., Viner, A.B., Lowe, D.J., The effect of climate on lake mixing patterns and temperatures (1987) DSIR Bulletin, 241, pp. 65-95. , AB Viner (ed.), In- land Waters of New Zealand. New Zealand Department of Scientific and Industrial Research
123