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Paleoecological Studies of Potato Lake and Its Environs
Author(s) -
Whiteside Melbourne C.
Publication year - 1965
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1934013
Subject(s) - pluvial , eutrophication , pollen , ecological succession , dominance (genetics) , sediment core , environmental science , loss on ignition , ecology , sediment , geology , physical geography , nutrient , oceanography , geography , environmental chemistry , biology , chemistry , paleontology , biochemistry , gene
A 286—cm core of sediments was taken from the center of Potato Lake, Coconino Co., Arizona. Pollen, chemical, and physical analyses were made on the sediment. Pluvial conditions, evidenced by high PAP percentages, exist until approximately the 120—cm level of the core; at this level a major change in pollen types occurs with pine assuming dominance. A core section at 142—172 cm was dated at 14,000 plus or minus 300 BP. Post—pluvial climate, as reflected by the pollen diagram, was fairly stable. Loss on ignition at 550 degrees C of the sediment material implies that eutrophication of Potato Lake began at the close of the pluvial. Variations of iron, manganese, and calcium may be explained by lake succession from oligotrophic to eutrophic conditions