. Drainage, drought, defoliation, and death in unmanaged Connecticut forests. Forests and forestry. Drainage, Drought, Defoliation, and Death 19 little difference between the two drainage classes. At Norfolk only a fourteenth of the population died on poorly drained soil, but death doubled on the better drained soils. At Catlin Wood two-thirds of the stems on poorly drained and three-fourths on the well drained soil died, but only a fifth succumbed on the moderately well drained soil. Loss of major species at Gay City and Natchaug was about twice that in Norfolk and Catlin Wood. For any compar
. Drainage, drought, defoliation, and death in unmanaged Connecticut forests. Forests and forestry. Drainage, Drought, Defoliation, and Death 19 little difference between the two drainage classes. At Norfolk only a fourteenth of the population died on poorly drained soil, but death doubled on the better drained soils. At Catlin Wood two-thirds of the stems on poorly drained and three-fourths on the well drained soil died, but only a fifth succumbed on the moderately well drained soil. Loss of major species at Gay City and Natchaug was about twice that in Norfolk and Catlin Wood. For any comparable drainage class, Gay City had greater loss than any other tract. Normally, in crowded stands we expect much, and in sparse stands, little death. We see this clearly for major species (Figure 3). Thus. 400 600 800 1000 1200 1959 POPULATION STEMS/ACRE Fig. 3 Mortality of major species during 1959-70 in relation to total popula- tion in 1959. The numbers are drainage class: 1, poorly drained; 2, mod- erately well drained; 3, well drained; 4, somewhat excessively drained. The tracts are Gay City (closed circle), Natchaug (X), Norfolk (open circle), Catlin Wood (open triangle). The line is the trend of mortality in unde- foliated Natchaug, Norfolk and Catlin Wood. loss of major species during 1959-70 was related to total population rather than to drainage class. Death of minor species was generally about twice that of major, but varied more among drainage classes. Although minor species aid in maintaining diversity, the major species really determine the char- acter of the forest. In the discussion of diversity we learned that three species, big- tooth aspen, black locust, and redcedar, were eliminated from the sample. However, on individual tracts additional species disappeared and were not replaced by birth. At Gay City, black cherry and shad-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio
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