stand initiation
DESCRIPTION
Stand Initiation. Competition with different life forms. Herbs Forbs Grasses Woody shrubs. Competition with many species. “ brushy stage”. Wide range of ages. A small advantage in years can be a large advantage in competitive ability. eastern white pine (. Pinus strobus. ). - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/1.jpg)
Stand Initiation
![Page 2: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/2.jpg)
![Page 3: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/3.jpg)
![Page 4: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/4.jpg)
![Page 5: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/5.jpg)
Competition with different life forms
• Herbs• Forbs• Grasses• Woody shrubs
![Page 6: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/6.jpg)
![Page 7: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/7.jpg)
Competition with many species
• “brushy stage”
![Page 8: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/8.jpg)
![Page 9: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/9.jpg)
Wide range of ages
• A small advantage in years can be a large advantage in competitive ability
![Page 10: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/10.jpg)
eastern white pine ( Pinus strobus )
Steven Katovich, USDA Forest Service, Bugwood.org
![Page 11: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/11.jpg)
Wide variation in site
• Small plant size magnifies the growth effects caused by subtle variations in microenvironment– Microsite is the entire environment of the
individual– Trees are in more vulnerable position• e.g. leader frost damage
![Page 12: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/12.jpg)
![Page 13: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/13.jpg)
![Page 14: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/14.jpg)
Stand environment changing rapidly
• Site is still responding to previous disturbance– ‘assart’ effect– Nitrogen fixing herbacious vegetation
![Page 15: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/15.jpg)
![Page 16: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/16.jpg)
Unfilled (available) growing space
• Free to grow stage
![Page 17: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/17.jpg)
![Page 18: Stand Initiation](https://reader036.vdocuments.net/reader036/viewer/2022081420/568164da550346895dd72c3d/html5/thumbnails/18.jpg)
Harper sieve• ‘Can’t be old if you die young’– Nature selects for competitive ability during
stand initiation stage– Tree breeding programs do not – require
management