Chapter 3: Old Growth, Disturbance, Forest Succession, and Management in the Area of the Northwest Forest Plan
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95 GENERAL TECHNICAL REPORT PNW-GTR-966
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+LJK ,+6 6FDUV ² ² a /RZ 9)/6 VXUYH\ UHFRUGV UHFRUGV $JHVFDUV ± ² ² ² /RZ 9)/6 $JHVFDUV ± ² ±± $JHVFDUV ² ² ² 0L[HG ,+6 $JHVFDUV ² ² ² 0L[HG ,+6 $JHVFDUV $JHVFDUV ² ² /RZPL[HG 9)/6 +LVWRULFDOODQG $JHFODVVIURP $JHFODVVIURP KLVWRULFDOVXUYH\ KLVWRULFDOVXUYH\ ~1900 aKD period Method ~100 ha :HVWHUQ :HVWHUQ 3UH SUH SUH Hectares Years Percent Hectares 3UH KD 3RVW :DVKLQJWRQ :DVKLQJWRQ ± ± ± ± ± Extent/time $JHH $JHH 'LFNPDQDQG&RRN )DKQHVWRFNDQG *DU]D KD $JHHHWDOD KD )DKHQVWRFNDQG :HDYHU$JHHHWDOD 8QNQRZQ KD 6FDUV ² ² ² 0L[HG 9)/6 $JHHHWDOD KD /HLEHUJ 6RXWKHUQ2UHJRQ $JHH%RUN KD :LOOVDQG6WXDUW 0RXQWDLQKHPORFN 7DEOH²)LUHKLVWRU\VWXGLHVLQWKH1RUWKZHVW)RUHVW3ODQDU Vegetation zone Study 6XEDOSLQH 'RXJODV¿UDQGJUDQG¿UZKLWH¿U 241 GENERAL TECHNICAL REPORT PNW-GTR-966 )06 regime Mapped Mapped 0L[HG 0)06 regime Interpreted Interpreted ² 0L[HG )069)/6 ²/RZPL[HG9)/6 High- ~10 000 ~10 severity SDWFKVL]H ± ² /RZPL[HG 9)/6 high Low/ moderate/ c 19 19 ² ²² )UHTXHQF\ HDE\SRWHQWLDOYHJHWDWLRQ]RQH FRQWLQXHG return interval Rotation 6FDUV ± ² ² ² /RZ 9)/6 6FDUV ± ² ² /RZPL[HG 0)06 6FDUV ± ± ² ± /RZ )06 SKRWRV LQYHQWRU\ $JHVFDUV $JHVFDUV ²$JHVFDUV ± ² ² ± ² ² 0L[HG ² 0)06 /RZ 9)/6 $JHVFDUV ± ² ² ² /RZ )06 $JHVFDUV /LYHVWUXFWXUH IURPKLVWRULFDO +LVWRULFDODHULDO a period Method KD KD aKD 3UH Hectares Years Percent Hectares 8QNQRZQ ± ± ± ± ± aKD aKD a± a± Extent/time ±KD :HVW 8QNQRZQ $JH ² ² ² /RZ 9)/6 :HDYHU 8QNQRZQ 6FDUV ± ² ² ² /RZ 9)/6 6RHULDDWPDGMD +HVVEXUJHWDO :ULJKWDQG$JHH %DNHU KD 9DQ1RUPDQ KD %URZQHWDO KD 6WXDUWDQG6DOD]DU 7D\ORUDQG6NLQQHU (YHUHWWHWDO ±KD 7D\ORUDQG6NLQQHU 3RQGHURVDSLQH 7DEOH²)LUHKLVWRU\VWXGLHVLQWKH1RUWKZHVW)RUHVW3ODQDU Vegetation zone Study 242 Synthesis of Science to Inform Land Management Within the Northwest Forest Plan Area regime Mapped Mapped regime Interpreted Interpreted ² /RZPL[HG 9)/6 ² /RZPL[HG 9)/6 High- severity SDWFKVL]H HUWHPSHUDWXUHDQGOLJKWLQJIUHTXHQF\DQGIROORZWKH high Low/ \IUHTXHQW±PL[HGVHYHULW\DQG9)/6LVYHU\IUHTXHQW±ORZ LQZKLFK¿UHIUHTXHQF\ZDVQRWDYDLODEOHZHFRQVLGHUHG¿UH moderate/ c ² ²² )UHTXHQF\ HDE\SRWHQWLDOYHJHWDWLRQ]RQH FRQWLQXHG return interval Rotation $JH ² ² ² /RZ 9)/6 6FDUV ± ² ² ² /RZ 9)/6 LQYHQWRU\ DHULDOSKRWRV /LYHVWUXFWXUH IURPKLVWRULFDO IURPKLVWRULFDO VDUHSUHGLFWHGIURPFRPELQDWLRQVRIVXPPHUSUHFLSLWDWLRQVXPP VHYHULW\,+6LVLQIUHTXHQW±KLJKVHYHULW\0)06LVPRGHUDWHO Z \HDUVPL[HGWR\HDUVKLJK!\HDUV ,QFDVHV period Method ~100 ha Hectares Years Percent Hectares 3UH 3UH ± a± /LYHVWUXFWXUH aKD Extent/time %DNHU KD %RUN +HVVEXUJHWDO 0RUURZ KD 6WHZDUWQRWHG¿UHVRYHUD\HDUSHULRG 5RWDWLRQIRUKLJKVHYHULW\RQO\ (VWLPDWHGDWDKD DF VFDOH ,QWHUSUHWHGUHJLPHVDUHFODVVL¿HGRQ¿UHIUHTXHQF\FODVVHVOR URWDWLRQDQGWKHSHUFHQWDJHRIKLJKVHYHULW\¿UH0DSSHGUHJLPH 7DEOH²)LUHKLVWRU\VWXGLHVLQWKH1RUWKZHVW)RUHVW3ODQDU Vegetation zone Study ² 1RYDOXHLQFHOO a b c d IRXUFODVVUHJLPHVXVHGLQWKLVFKDSWHU)06LVIUHTXHQW±PL[HG VHYHULW\KD DF 243 GENERAL TECHNICAL REPORT PNW-GTR-966 $QRUWKHUQVSRWWHGRZOLQWKH0F.HQ]LH5LYHU%DVLQLQ2UHJRQ 3KRWRE\-RKQDQG.DUHQ+ROOLQJVZRUWK86)LVKDQG:LOGOLIH6HUYLFH 244