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ENVIRONMENTAL CONSEQUENCES in rocky mountain coniferous ...

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Group Selection Group Selection<br />

TYPE OF CUTTING UNIT<br />

UPPER UNITS<br />

Figure 13.--Bird species divers-<br />

ities <strong>in</strong> control and cut uniks.<br />

TABLE 11. Comparison of amount of woody material rema<strong>in</strong><strong>in</strong>g after logg<strong>in</strong>g and bird<br />

species diversity <strong>in</strong> different types of cuts.<br />

Control (uncut)<br />

Shel terwood<br />

Group Selection (cut)<br />

Clearcut<br />

Control (uncut)<br />

Shel terwood<br />

Group Selection (cut)<br />

Cl earcut<br />

'~ird species diversity <strong>in</strong>dex formula:<br />

LOWER UNITS<br />

ms/ha post-logq<strong>in</strong>q Bird species<br />

(23 <strong>in</strong> (7.6 cm) diam.) diversity <strong>in</strong>dex1<br />

HIGHER UNITS<br />

1

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