1 / 86

Ecological Restoration

Ecological Restoration. FOR 406 Silviculture. Harvest. Regenerate. Silvicultural System. Tend. Harvest. Regenerate. Ecological Restoration. Tend. What is a “ natural ” ecosystem?. Native (indigenous) species interact in a self-sustaining manner

prue
Télécharger la présentation

Ecological Restoration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ecological Restoration FOR 406 Silviculture

  2. Harvest Regenerate Silvicultural System Tend

  3. Harvest Regenerate Ecological Restoration Tend

  4. What is a “natural” ecosystem? • Native (indigenous) species interact in a self-sustaining manner • Species persist through natural recruitment rather than managed reproduction • Population dynamics are regulated internally • Disturbance regimes function within their pre-disruption range of variability • Trophic dynamics are sustainable over time • Usually equated with some pre-existing condition; e.g., “pre-European settlement” Attainable?

  5. Porcupine Mountains State Park

  6. Sleeping Bear Dunes National Lakeshore

  7. What is an “unnatural” ecosystem? • High proportion of nonnative (exotic) species • Exhibits wide swings in population dynamics, thereby requiring continual management actions • Dominated by disturbance regimes far different than those present before degradation • Difficult or impossible to restore to natural conditions

  8. What is a “degraded” ecosystem? • Somewhere in between natural and unnatural conditions • Potentially restorable to a more natural condition

  9. Natural ecosystems Degraded ecosystems Restoration Unnatural ecosystems

  10. “Historical ecology”

  11. “Historical ecology” • The desired future condition is a past condition • How far past is past? • The goal should be to achieve a historical range of variability • Therefore, not only species and structures must be restored, but also processes

  12. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems

  13. Toumey Woods

  14. Newton Woods

  15. Estivant Pines

  16. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems • Matching species with habitat

  17. Shade tolerance Deep Shade Partial Intermittent Full sun shade shade sun Tolerant Moderately Moderately Intolerant tolerant intolerant

  18. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems • Matching species with habitat • General Land Office (GLO) survey records

  19. One township 6 5 4 3 2 1 7 8 9 10 11 12 One section 18 17 16 15 14 13 15 19 20 21 22 23 24 30 29 28 27 26 25 31 32 33 34 35 36

  20. S 15 S 16 S 21 S 22

  21. Historic forest composition changes at a location in Cheboygan County Michigan (Data from Palik & Pregitzer 1992)

  22. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems • Matching species with habitat • General Land Office (GLO) survey records • Written descriptions by early settlers & scientists; native oral traditions

  23. J.W. Wing, 1839

  24. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems • Matching species with habitat • General Land Office (GLO) survey records • Written descriptions by early settlers & scientists; native oral traditions • Old photographs & maps

  25. State Archives of Michigan

  26. MSU Archives & Historical Collections

  27. MSU Archives & Historical Collections

  28. MAC Exp. Sta. Bulletin 162 (1898)

  29. How can pre-existing conditions be defined? Extrapolation from “undisturbed” natural ecosystems Matching species with habitat General Land Office (GLO) survey records Written descriptions by early settlers & scientists; native oral traditions Old photographs & maps Micro-fossil (pollen) record

  30. Pollen diagram from a bog in Lapeer County

  31. How can pre-existing conditions be defined? • Extrapolation from “undisturbed” natural ecosystems • Matching species with habitat • General Land Office (GLO) survey records • Written descriptions by early settlers & scientists; native oral traditions • Old photographs & maps • Micro-fossil (pollen) record • Dendrochronology

  32. 226 years of radial growth in a northern white cedar swamp near Escanaba Ring width (mm) Year

  33. ~1890--tree 120 years old

More Related