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Comparative Growth and Foliar Element Concentrations of Larix Laricina Over a Range of Wetland Types in Minnesota
Donald L. Tilton
Journal of Ecology
Vol. 66, No. 2 (Jul., 1978), pp. 499-512
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2259148
Page Count: 14
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(1) Growth and foliar concentrations of N, P, K, Ca, Mg, Al, Fe, Mn, Zn and B in Larix laricina were measured at twenty-two sites in Minnesota, ranging from ombrotrophic, Sphagnum-dominated bogs to sandy mineral soils. (2) Needle and lateral shoot length, stemwood radial increment and site index (the height attainable by dominant 50-year-old trees) were lower in acid, nutrient-poor bogs than in circumneutral, relatively nutrient-rich fens. Variation in these growth measures was positively correlated with foliar concentrations of N and, to a lesser extent, P. (3) Nitrogen and P concentrations in the foliage were positively correlated with specific conductivity of the soil water at a site, and inversely correlated with site wetness. Foliar concentrations of Ca were also positively correlated with specific conductivity, while Mg concentrations in the foliage were positively correlated with soil water pH and specific conductivity. Manganese concentrations were inversely related to soil water pH.
Journal of Ecology © 1978 British Ecological Society