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

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

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  1. 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)

  2. 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

  3. 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

  4. 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

  5. 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

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

  7. 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

  8. 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

  9. 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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