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Ecological Restoration FOR 406 Silviculture
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HarvestRegenerate Tend
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HarvestRegenerate Tend
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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?
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Porcupine Mountains State Park
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Sleeping Bear Dunes National Lakeshore
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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
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What is a “degraded” ecosystem? Somewhere in between natural and unnatural conditions Potentially restorable to a more natural condition
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Natural ecosystems Unnatural ecosystems Degraded ecosystems Restoration
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“Historical ecology”
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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 “Historical ecology”
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How can pre-existing conditions be defined? Extrapolation from “undisturbed” natural ecosystems
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Toumey Woods
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Newton Woods
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Estivant Pines
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How can pre-existing conditions be defined? Extrapolation from “undisturbed” natural ecosystems Matching species with habitat
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Deep Shade Partial Intermittent Full sun shade shade sun Tolerant Moderately Moderately Intolerant tolerant intolerant Shade tolerance
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How can pre-existing conditions be defined? Extrapolation from “undisturbed” natural ecosystems Matching species with habitat General Land Office (GLO) survey records
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15 6 5 4 3 2 1 7 8 9 10 11 18 17 16 15 14 13 19 20 21 22 23 24 30 29 28 27 26 25 31 32 33 34 35 36 One township One section 12
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S 16 S 22 S 15 S 21
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Historic forest composition changes at a location in Cheboygan County Michigan (Data from Palik & Pregitzer 1992)
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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
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J.W. Wing, 1839
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“The scene was beautiful beyond description. The timber consisted of large oak trees standing several rods apart and the intermediate space between them was covered with bright green grass and beautiful flowers. The whole country had been burnt over every fall or spring, I presume for centuries, and everything has been destroyed except these giants of the forest. It appears as if one-half of the vegetation was flowers. The most of them were about 18 inches high and when moved by the wind the effect was wonderful.” J.W. Wing 1839 Oak opening west of Ann Arbor
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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
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State Archives of Michigan
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MSU Archives & Historical Collections MSU Archives & Historical Collections
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MSU Archives & Historical Collections
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MAC Exp. Sta. Bulletin 162 (1898)
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Key to county acreage figures on 1898 map (top to bottom) Hardwood Pine Hemlock Plains Swamp
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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
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Pollen diagram from a bog in Lapeer County
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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
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Ring wid t h (mm) Year 226 years of radial growth in a northern white cedar swamp near Escanaba
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~1890--tree 120 years old
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The Restoration Arsenal The Restoration Arsenal
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The Restoration Arsenal The Restoration Arsenal
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The Restoration Arsenal The Restoration Arsenal
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Area of Michigan occupied by savanna communities circa 1800 (data from MNFI) ~2.2 million acres
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Area of Michigan occupied by savanna communities today +1 thousand acres? X
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The Restoration Arsenal The Restoration Arsenal
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Use of herbicides in restoration Post-emergents (selective placement): Foliar spray Stump application Bark application Pre-emergents: Spot seeding or plantings Large-area seeding (broadcast)
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The Restoration Arsenal The Restoration Arsenal
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The Restoration Arsenal The Restoration Arsenal
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The Restoration Arsenal The Restoration Arsenal
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The enemy!
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The Restoration Arsenal The Restoration Arsenal
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Begin the restoration, and they will come…
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Light the fire, and they will come…
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The Restoration Arsenal The Restoration Arsenal
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Restoration Time Frame Fully restored Degraded 0 ? Years Natural Ecosystem 1050100
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Agency, corporate, or unit budgets Government or foundation grants Private or corporate contributions Fund-raising events, auctions, or merchandise sales Entrance fees or donations All of the above No mon, no fun…
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Since 1902
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Production Reserve Integrated Management Matrix Integrated Management Matrix Adapted from Palik, Levy, & Crow
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