previous stcv works · previous stcv works krebs, m. 2003 . effects of understory vegetation on the...
TRANSCRIPT
![Page 1: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/1.jpg)
![Page 2: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/2.jpg)
Previous STCV works
Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting sites in northwestern Montana. (Thesis) University of Montana, Missoula MT.
Keller, K. 2005. Applying the Prediction of Four-Year Height Growth of Douglas-fir and Ponderosa pine Saplings to an Existing Growth Simulator. (Thesis) University of Montana, Missoula MT.
Salas, C., A. Stage, and A. Robinson. 2008. Modeling Effects of Overstory Density and Competing Vegetation on Tree Height Growth. Forest Science 54(1)107:122
McHugh, R. 2009. Effects of Overstory Retention and Understory Vegetation on Small Tree Height Growth in the Inland Northwest. (Thesis) University of Montana, Missoula MT.
![Page 3: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/3.jpg)
Large tree overstory plot (DBH ≥ 10.5”)
Area = 0.46 acre
Medium tree overstory plot (DBH > 3.5”)
Area = 0.26 acre
Small tree plot (x6) Area = 0.007 acre
Plot center
Vegetation transect (x6) Length = 31 ft
1m² or 4m² quad (x6)
Not drawn to scale
![Page 4: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/4.jpg)
Tagged tree height measurement
Height measured to culmination of previous year’s growth (highest whorl)
![Page 5: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/5.jpg)
Installation locations
![Page 6: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/6.jpg)
Installation measurement schedules
![Page 7: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/7.jpg)
Installation characteristics
Name Est Habitat type Grow cycles PIPO Saplings
Empry Mountain (EM) 2000 PSME 2 183 659
Grouse Creek (GC) 1999 ABGR 3 80 277
Kiefer Cabin (KC) 2001 PSME 2 97 1,438
Loon Lake (LL) 1999 PSME 3 211 3,458
![Page 8: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/8.jpg)
Overstory conditions
![Page 9: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/9.jpg)
Understory conditions by treatment
![Page 10: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/10.jpg)
Tagged tree initial heights
![Page 11: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/11.jpg)
Growth rates by initial height
![Page 12: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/12.jpg)
Growth rates by CCF
![Page 13: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/13.jpg)
Growth rates by US cover
![Page 14: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/14.jpg)
Growth rates by US cover
![Page 15: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/15.jpg)
FVS small tree height growth model
Intercept
1. Location
2. Habitat type*
3. Aspect & Slope
4. Species*
Slope
1. Initial height*
2. CCF*
3. BAL*
* Denotes species specific coefficients
![Page 16: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/16.jpg)
FVS slope / aspect model term
![Page 17: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/17.jpg)
![Page 18: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/18.jpg)
![Page 19: Previous STCV works · Previous STCV works Krebs, M. 2003 . Effects of understory vegetation on the photosynthesis and leaf water potential of young Douglas-fir trees on two contrasting](https://reader034.vdocument.in/reader034/viewer/2022050600/5fa813317ae6f8152a1c1b75/html5/thumbnails/19.jpg)
Summary
Findings
Initial height and OS competition important
US competition effects slight, use habitat type as surrogate
FVS IE users be wary growing small PIPO under sparse OS conditions
Next steps...
Examine tree specific measures of US competition
More installations
Other species