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Uptake of [14C]glycine by various size fractions of natural plankton communities was measured to determine if phytoplankton can compete effectively with other members of the plankton community for the free amino acids in seawater. The simultaneous occurrence of glycine uptake, plant pigments, and photosynthetic activity in the same size fractions,...
The western Siskiyou Mountain forest vegetation
is grouped into eight communities based on parent
material. Three groups of data are analyzed using a computerized
ordination technique, two of the groups together,
and one separately. Two communities associated with
ultramafic parent materials, two on sandstone, one on
greenstone, and one on...