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Differences in Extractable Phosphorus Among Soils of the La Selva Biological Station, Costa Rica

Peter M. Vitousek and Julie S. Denslow
Biotropica
Vol. 19, No. 2 (Jun., 1987), pp. 167-170
DOI: 10.2307/2388740
Stable URL: http://www.jstor.org/stable/2388740
Page Count: 4
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Differences in Extractable Phosphorus Among Soils of the La Selva Biological Station, Costa Rica
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Abstract

Low levels of extractable phosphorus (1.6 $\pm$ 0.14 $\mu$ g/g) were observed in soils which apparently developed from an old lava flow at La Selva, and progressively higher levels were found in soils derived from another lava flow (2.6 $\pm$ 0.15 $\mu$ g/g), old alluvial material (3.9 $\pm$ 0.31), and recently deposited alluvium (36.6 $\pm$ 3.4). No significant differences in nitrogen mineralization were observed among these soils. Seedlings of Phytolacca rivinoides accumulated more biomass when grown in old alluvial soils than in soils in derived from lava flow. Studies of population-, physiological-, and ecosystem-level processes could benefit from considering such differences.

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