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Dictyostelid Cellular Slime Molds in Canopy Soils of Tropical Forest
Steven L. Stephenson and John C. Landolt
Vol. 30, No. 4 (Dec., 1998), pp. 657-661
Published by: Association for Tropical Biology and Conservation
Stable URL: http://www.jstor.org/stable/2388835
Page Count: 5
You can always find the topics here!Topics: Forest soils, Forest canopy, Forest litter, Experimental forests, Epiphytes, Soil fungi, Tropical soils, Forest ecology, Soil ecology, Tree trunks
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The occurrence and distribution of dictyostelid cellular slime molds (CSM) in the mantle of dead organic matter (literally a "canopy soil") at the bases of large epiphytes were studied in the Luquillo Experimental Forest of northeastern Puerto Rico. CSM were isolated from 18 of 50 samples collected from this microhabitat, and four different species were recovered. Dictyostelium purpureum was the single most abundant species and represented almost half (48%) of all clones isolated during the study. Total densities (clones/g) averaged only 38 in the five forest types examined, but densities > 75 were recorded for two forest types. Relative abundance of CSM in canopy soils of the five forest types followed the same general pattern displayed by these organisms in forest floor litter, but a particular species was not necessarily common to both microhabitats in a given forest type.
Biotropica © 1998 Association for Tropical Biology and Conservation