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2011 Report „ Effects of air pollution on forests “ Two studies Forest soil condition

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2011 Report „ Effects of air pollution on forests “ Two studies Forest soil condition Bruno De Vos et al. (FSCC at INBO, Belgium ) Forest biodiversity under deposition impact Co- operation with ICP M&M Max Posch et al. (CCE) Hans-Dieter Nagel et al. (ÖKO-DATA) Data from

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slide1

2011 Report „Effectsofairpollution on forests“

  • Twostudies
  • Forestsoilcondition
    • Bruno De Vos et al. (FSCC at INBO, Belgium)
  • Forestbiodiversityunderdepositionimpact
    • Co-operationwith ICP M&M
      • Max Posch et al. (CCE)
      • Hans-Dieter Nagel et al. (ÖKO-DATA)
  • Data from
    • ICP Forests (Levels I and II)
    • EC (Regulation Forest Focus)
slide2

Forestsoilconditionanditschange

  • Twoforestsoilsurveys
  • On morethan 5.000 Level I plots
  • ICP Forests:1986-1996
  • EC: 2004-2008 under Regulation (EC) 2152/2003 Forest Focus
  • (applicationof ICP Forestsmethods)
  • Presentreportfocus on
  • C/N ratio
  • C/N index
  • Base saturation
  • pH
slide3

C/N ratio

  • In healthyforests:
  • C/N ratio on forestfloor (C/N FF)
  • higher
  • C/N ratio in mineralsoil (C/N MIN)
  • Underhigh N-pollutionloads:
  • C/N FF < C/N MIN
  • Usefulindicatorforexcess N:
  • C/N FF
  • C/N index = ---------
  • C/N MIN
slide4

C/N index

  • C/N index < 1
  • Organic matter and nutrient cycling disturbed
  • Risk to forest health
  • Areas of C/N index < 1
  • Red (France, Germany, Latvia)
  • C/N index
  • Lower in central/western Europe
  • Higher in northern, eastern and southern Europe
slide5

Base saturation

  • Gradient
  • Lower in northern Europe
  • Higher in southern Europe
  • Geologic origin
  • Upper mineral soil (0-10 cm)
  • Central Europe
    • Soils with low base saturation
    • (< 20%)
    • Result of acid deposition
  • Share of plots with low base saturation
    • First survey: 48%
    • Second survey: 28%
    • Recovery
slide6

pH

  • Changesbetweentwosurveys
  • Increase on plotswithacidsoils (pH < 4.0)
  • Decrease on plotswithlessacidsoils (pH > 4.0)
slide7

Development offorestbiodiversity

  • Deposition scenario „NATIONAL“
  • Implementationofemission-relatedlegislation in EU-27
  • (LatestversionbyCCE)
  • Applicationof VSD+
  • 20 Level II plots
  • 12 countries
  • Changesfrom 2000 to 2050
    • C/N
    • Base saturation
  • Application BERN
  • Resultsof VSD+ asinput variables
  • Response of plant communitiessimulated
slide8

Resultsof BERN

  • Adaptation of plant communities
  • tositeconditions
  • High on 10 plots
    • Fullregeneration potential
    • High vitality
  • Moderate on 5 plots
    • Low regeneration potential
    • Reducedvitality
  • Low on 4 plots
    • Noregeneration potential
    • Low vitality
slide9

Presentlygrowingtreespecies

  • Adaptation determinedfor
  • Present time
  • 2050
  • Site conditionspredicted
  • todeteriorate on 4 plots
  • toimprove on 3 plots
  • For all 19 plots
  • „targettreespecies“
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