Abstract
Increment-core data for old-growth red spruce (Picearubens Sarg.) were collected for dendrochonological purposes and compared with second-growth data obtained from USDA Forest Service inventory plots in Maine, New Hampshire, Vermont, and New York. The research objective was to test the hypothesis suggested by J. W. Hornbeck and R. B. Smith (1985, Can. J. For. Res. 15: 1199–1201) that red spruce show reduced growth in the Northeastern United States due to stand dynamics resulting from past logging and insect activity. A graphical approach and a modeling approach based on the Kalman filter were employed. The results indicate that the growth reduction is greater in second-growth stands and that the second-growth stands are converging to an old-growth condition. This supports the stand dynamics hypothesis for second-growth stands.
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