ALGAL COMMUNITIES AND SOIL MICROENVIRONMENTS IN AN EASTERN WASHINGTON SILT LOAM

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Abstract

ABSTRACT

Thirteen genera belonging to three divisions of algae were isolated from four microenvironments within an eastern Washington silt loam supporting a stand of Pinus ponderosa. The microenvironments were defined on the basis of spatial relation to the canopy of a pine, pH, electrical conductivity, cation exchange capacity, percent base saturation, percent organic matter, and total nitrogen. Numbers of algae, bacteria, and fungi, as well as soil moisture and temperature, water extractable K+, Na+, Ca++, and Mg++, and available phosphorous were quantified on three dates in 1976. Microbial numbers were evaluated in light of soil properties, and generic diversity of algae was compared with that recorded for soils supporting other species of Pinus.

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