. Plant succession; an analysis of the development of vegetation. Plant ecology. CLIMATIC CYCLES. 331 be drawn in the manner of isotherms (figs. 27, 28). The areas of excess are termed pleions, those of deficiency, antipleions. Arctowski has found that a pleion may last for several years, its center moving back and forth in irregular curves; it may grow less, tend to divide into two or more sections and practi- cally disappear, or it may increase and gather into marked local areas of great intensity. It appears certain that they are a pronounced feature of conti-. 1. Please note that these ima
. Plant succession; an analysis of the development of vegetation. Plant ecology. CLIMATIC CYCLES. 331 be drawn in the manner of isotherms (figs. 27, 28). The areas of excess are termed pleions, those of deficiency, antipleions. Arctowski has found that a pleion may last for several years, its center moving back and forth in irregular curves; it may grow less, tend to divide into two or more sections and practi- cally disappear, or it may increase and gather into marked local areas of great intensity. It appears certain that they are a pronounced feature of conti-. 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clements, Frederic E. (Frederic Edward), 1874-1945. Washington, Carnegie Institution of Washington
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