Creating Early Seral Forest Openings

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Andy Gray - Alternatives for creating early seral forest openings

Alternatives for creating early seral forest openings Andrew Gray

What is an early seral forest? ,[object Object],[object Object],[object Object]

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Important disturbance characteristics ,[object Object],[object Object],[object Object],[object Object]

HJA old-growth Trout Ck. old-growth Panther Ck. mature Martha Ck. mature

Gap light and moisture patterns Light Soil moisture N

Fig. 4. Average differences in soil moisture between the clearcut and the forested areas during spring (April-June), summer (July-September), and fall (October-November), 1960-1980. Positive values indicate higher soil moisture in the clearcut area. Solid data points represent significant differences (t~ = 0.05, t-test of inequality) between the clearcut and forested areas. P.W. Adams et al. 1991. For. Ecol. Manage. 41: 249-263 Soil moisture is temporarily more abundant after clear-cutting

Changes in cover of residual and invader species Mean of summed cover by species group

Density of natural regeneration after 3 growing seasons Hemlock in old-growth only. Density in mature stands=0.

Tree canopy closure was faster in old-growth stands

Blue River Landscape Study: based on natural-disturbance regimes

Teakettle study: burn and/or thin? No thin CASPO thin Shelterwood No burn Burn

Understory response to thinning and burning No burn Burn

No burn Burn No burn Burn white fir incense-cedar Jeffrey pine sugar pine

Is NFMA a barrier to enhancing early-seral forest? "... all forested lands in the National Forest System shall be maintained in appropriate forest cover with species of trees, degree of stocking , rate of growth, and conditions of stand designed to secure the maximum benefits of multiple use sustained yield management in accordance with land management plans.”

Conclusions ,[object Object],[object Object],[object Object]

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Creating Early Seral Forest Openings

1. Alternatives for creating early seral forest openings Andrew Gray

4. IT DEPENDS...

6. Experimental design

7. HJA old-growth Trout Ck. old-growth Panther Ck. mature Martha Ck. mature

8. Gap light and moisture patterns Light Soil moisture N

10.

11.

12. Fig. 4. Average differences in soil moisture between the clearcut and the forested areas during spring (April-June), summer (July-September), and fall (October-November), 1960-1980. Positive values indicate higher soil moisture in the clearcut area. Solid data points represent significant differences (t~ = 0.05, t-test of inequality) between the clearcut and forested areas. P.W. Adams et al. 1991. For. Ecol. Manage. 41: 249-263 Soil moisture is temporarily more abundant after clear-cutting

13. Change in species richness by gap size

14. Changes in cover of residual and invader species Mean of summed cover by species group

15. Residual plants can take the heat

16. Density of natural regeneration after 3 growing seasons Hemlock in old-growth only. Density in mature stands=0.

17. Tree canopy closure was faster in old-growth stands

18. Where’d my early seral go?

19. Blue River Landscape Study: based on natural-disturbance regimes

20. Landscape area 1 (N. Fk. Quartz)

21. Forb species in BRLS study

22. Teakettle study: burn and/or thin? No thin CASPO thin Shelterwood No burn Burn

23. Understory response to thinning and burning No burn Burn

24. No burn Burn No burn Burn white fir incense-cedar Jeffrey pine sugar pine

25.

26. Is NFMA a barrier to enhancing early-seral forest? "... all forested lands in the National Forest System shall be maintained in appropriate forest cover with species of trees, degree of stocking , rate of growth, and conditions of stand designed to secure the maximum benefits of multiple use sustained yield management in accordance with land management plans.”

27. Seral conditions on private lands

28.

29.

Creating Early Seral Forest Openings

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