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“Multiple-Stable States” Changes in: Species diversity Opportunistic species Incidence of disease Tightness of nutrient cycling Net Primary Production Natural Range of Stable States Degraded/ Loss of integrity
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HRV Historical Range of Variability Figure from Aplet and Keeton (1999)
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Multiple Pathways of Succession: f (Timing, Type, and Intensity of Disturbances + Masting and Seed Availability) From Hemstrom and Logan (1986), in Spies (1997)
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Climate DirectIndirec t Effects on Organisms (Physiological, etc.) Effects on Disturbance Regimes Ecosystem Composition and Function
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Multiple stressors produce a vulnerable landscape * *Text and figure reprinted with permission from D.L. Peterson et al. 1999.
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300 0 Biomass (Mg/ha) Stand Age (years) 0100200400300 ? Empirical Data from Keeton et al. (2007) and others Empirical Data from Bormann and Likens (1979) Theoretical Projections from Bormann and Likens (1979)
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304.5 Mg/ha 216.6 Mg/ha 292.3 Mg/ha 178.9 Mg/ha 251.6 Mg/ha 223.8 Mg/ha 55.9 Mg/ha 80.7 Mg/ha
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