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In Vlaanderen bestaan een aantal maatregelen die impact hebben op de zogenaamde ARD (Afforestation, Reforestation and Deforestation) activiteiten uit het Artikel 3.3 van het Kyoto Protocol. De aanleg van nieuwe bossen wordt gestimuleerd door subsidies uit te reiken voor de bebossing van landbouwgronden. Sinds 2001 is de zogenaamde ontbossingsstop en de boscompensatie van kracht. Dit wil zeggen dat ontbossing in principe verboden is in Vlaanderen. Percelen die op de structuurplannen ingekleurd staan als woongebied of industriegebied kunnen echter wel ontbost

worden na het aanvragen van een vergunning. In dit geval wordt wel een goedgekeurd compensatievoorstel geëist. Dit houdt in dat de bezitter zelf nieuwe percelen moet bebossen of een bedrag kan overmaken naar het Bossenfonds van de Vlaamse overheid, die het ter beschikking stelt van het Agentschap voor Natuur en Bos, die met dit fonds compenserende bebossing moet realiseren. Netto realiseren de subsidiemaatregelen en de bebossingen met het Bossenfonds een kleine jaarlijkse toename van de oppervlakte bos in Vlaanderen.

Een andere maatregel die de C-opslag beïnvloedt maar niet gevaloriseerd wordt in het Kyoto Protocol is het stimuleren van de ecologische bosfunctie via subsidies en door de uitbouw van de bosgroepen. Dit kan leiden tot het gebruik van boomsoorten met langere omlooptijden (bvb. populier vervangen door inheemse langlevende boomsoorten) en dus een grotere C-voorraad op stam. De aanwezigheid van dood hout in het bos wordt eveneens gestimuleerd in het kader van natuurgerichte bosbouw. Recent werden in Vlaanderen diverse proefprojecten opgestart rond korte omloophout (SRF) op landbouwgronden. De ervaringskennis die daarmee wordt opgebouwd zal toelaten grootschaliger projecten te realiseren, waarbij landbouwers een degelijk inkomen kunnen verwerven met deze vorm van (groene) energieteelt en tegelijk de C opslag in landbouwbodems verhoogd kan worden.

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Barford CC, Wofsy SC, Goulden ML, Munger JW, Pyle EH, Urbanski SP, Hutyra L, Saleska SR, Fitzjarrald D, Moore K (2001) Factors controlling long- and short-term sequestration of atmospheric CO2 in a mid-latitude forest. Science 294, 1688-1691. Barnola JM, Anklin M, Porcheron J, Raynaud D, Schwander J, Stauffer B (1995) CO2 evolution during the last millennium as recorded by Antarctic and Greenland Ice. Tellus Series B-Chemical and Physical Meteorology 47, 264-272.

Callesen I, Liski J, Raulund-Rasmussen K, Olsson MT, Tau-Strands L, Vesterdal L and Westman CJ (2003) Soil carbon stores in Nordic well-drained forest soils, relationships with climate and texture class. Global Change Biology 9, 358-370.

Capoor K, Ambrosi P (2008) State and trends of the carbon market 2008. Washington D.C., World Bank.

Cardon ZG, Hungate BA, Cambardella CA, Chapin III FS, Field CB, Holland EA, Mooney HA (2001) Contrasting effects of elevated CO₂ on old and new soil carbon pools. Soil Biology and Biochemistry 33, 365-373.

Curtis PS, Wang X (1998) A meta-analysis of elevated CO₂ effects on woody plant mass, form and physiology. Oecologia 113, 299-313.

Davidson EA (1995) Spatial covariation of soil organic carbon, clay content, and drainage class at a regional scale. Landscape Ecology 10, 349-362.

Davidson EA, Savage K, Bolstad P, Clark DA, Curtis PS, Ellsworth DS, Hanson PJ, Law BE, Luo Y, Pregitzer KS, Randolph JC, Zak D (2002) Belowground carbon allocation in forests estimated from litterfall and IRGA-based soil respiration measurements. Agricultural and Forest Meteorology 113, 39-51.

De Ceuster G (2004) Internalisering van externe kosten van wegverkeer in Vlaanderen.

Studie uitgevoerd in opdracht van de Vlaamse Milieumaatschappij, MIRA/2004/04. Transport & Mobility Leuven.

De Vos B (2009) Uncertainties of forest soil carbon stock assessment in Flanders. PhD dissertation. Department of Earth and Environmental Sciences. K.U.Leuven, Leuven. pp. 296.

De Vries W, Reinds GJ, Posh M, Sanz MJ, Kraus GHM, Calatayud V (2003) Intensive monitoring of forest ecosystems in Europe. ICP/EC-UN/ECE.

Dendoncker N, van Wesemael B, Rounsevell MDA, Roelandt C, Lettens S (2004) Belgium's CO2 mitigation potential under improved cropland management. Agriculture, Ecosystems and Environment 103, 101-116.

Dendoncker N, Van Wesemael B, Smith P, Lettens S, Roelandt C, Rounsevell M (2008) Assessing scale effects on modelled soil organic carbon contents as a result of land use change in Belgium. Soil Use and Management 24, 8-18.

Etheridge DM, Steele LP, Langenfelds RL, Francey RJ, Barnola JM, Morgan VI (1996) Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn. Journal of Geophysical Research-Atmospheres 101, 4115-4128.

Falloon P, Powlson D, Smith P (2004) Managing field margins for biodiversity and carbon sequestration: a Great Britain case study. Soil Use and Management 20, 240-247.

Garten CT, Classen AT, Norby RJ (2009) Soil moisture surpasses elevated CO2 and temperature as a control on soil carbon dynamics in a multi-factor climate change experiment. Plant and Soil 319, 85-94.

Guo LB, Gifford RM (2002) Soil carbon stocks and land use change: a meta analysis. Global Change Biology 8, 345-360. Hagedorn F, Maurer S, Egli P, Blaser P, Bucher JB , Siegwolf R (2001) Carbon sequestration in forest soils: effects of soil type, atmospheric CO2 enrichment, and N deposition. European Journal of Soil Science 52, 619-628.

Houghton RA (1999) The annual net flux of carbon to the atmosphere from changes in land use 1850-1990. Tellus Series B-Chemical and Physical Meteorology 51, 298-313.

IPCC, 2007: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 996 pp. Janssens IA, Lankreijer H, Matteucci G, Kowalski AS, Buchmann N, Epron D, Pilegaard K, Kutsch W, Longdoz B, Grunwald T, Montagnani L, Dore S, Rebmann C, Moors EJ, Grelle A, Rannik U, Morgenstern K, Oltchev S, Clement R, Gudmundsson J, Minerbi S, Berbigier P, Ibrom A, Moncrieff J, Aubinet M, Bernhofer C, Jensen NO, Vesala T, Granier A, Schulze ED, Lindroth A, Dolman AJ, Jarvis PG, Ceulemans R, Valentini R (2001) Productivity overshadows temperature in determining soil and ecosystem respiration across European forests. Global Change Biology 7, 269-278.

Johnson DW, Curtis PS (2001) Effects of forest management on soil C and N storage: meta analysis. Forest Ecology and Management 140, 227-238.

Karjalainen T, Pussinen A, Liski J, Nabuurs GJ, Erhard M, Eggers T, Sonntag M, Mohren GMJ (2002) An approach towards an estimate of the impact of forest management and climate change on the European forest sector carbon budget: Germany as a case study. Forest Ecology and Management, 162 87-103.

Keeling CD, Whorf TP (2000) The 1,800-year oceanic tidal cycle: A possible cause of rapid climate change. Proceedings of the National Academy of Sciences of the United States of America 97, 3814-3819.

Knorr W, Prentice IC, House JI, Holland EA (2005) Long-term sensitivity of soil carbon turnover to warming. Nature 433, 298-300.

Laitat E, Perrin D, Sheridan M, Lebegue C, Pissart G (2004) EFOBEL un modèle de calcul de la séquestration du carbone par les foręts, selon les termes des accords de Marrakech et les engagements de rapportage de la Belgique au Protocole de Kyoto. Biotechnology, Agronomy, Society and Environment 8, 27-40.

Lettens S, Van Orshoven J, Perrin D, Van Wesemael B, Muys B (2008) Organic carbon stocks and stock changes of forest biomass in Belgium derived from forest inventory data in a spatially explicit approach. Annals of Forest Science 65, 1286-4560. Lettens S, Van Orshoven J, Van Wesemael B, De Vos B and Muys B (2005a) Stocks and fluxes of soil organic carbon for landscape units in Belgium derived from heterogeneous data sets for 1990 and 2000. Geoderma 127, 11-23.

Lettens S, Van Orshoven J, van Wesemael B, Muys B, Perrin D (2005b) Soil organic carbon changes in landscape units of Belgium between 1960 and 2000 with reference to 1990. Global Change Biology 11, 2128-2140.

Liebens J and Van Molle M (2003) Influence of estimation procedure on soil organic carbon stock assessment in Flanders, Belgium. Soil Use and Management 19, 364-371.

Liekens Inge, Jan Staes, Marije Schaafsma, Leo De Nocker, Roy Brouwer, Patrick Meire. (2009) Economische

waarderingsstudie van natuurlandschappen voor MKBA. Studie uitgevoerd in opdracht van: LNE afdeling milieu-, natuur- en energiebeleid.

Liski J, Lehtonen A, Palosuo T, Peltoniemi M, Eggers T, Muukkonen P, Makipaa R (2006) Carbon accumulation in Finland's forests 1922-2004 - an estimate obtained by combination of forest inventory data with modelling of biomass, litter and soil. Annals of Forest Science 63, 687-697.

Liski J, Perruchoud D, Karjalainen T (2002) Increasing carbon stocks in the forest soils of Western Europe. Forest Ecology and Management 169, 159-175.

Medlyn BE, Badeck FW, De Pury DGG, Barton CVM, Broadmeadow M, Ceulemans R, De Angelis P, Forstreuter M, Jach ME, Kellomaki S, Laitat E, Marek M, Philippot S, Rey A, Strassemeyer J, Laitinen K, Liozon R, Portier B, Roberntz P, Wang K, Jarvis PG (1999) Effects of elevated [CO2] on photosynthesis in European forest species: a meta-analysis of model parameters. Plant Cell and Environment 22, 1475-1495.

Meersmans J, De Ridder F, Canters F, De Baets S and Van Molle M (2008) A multiple regression approach to assess the spatial distribution of soil organic carbon (SOC) at the regional scale (Flanders, Belgium). Geoderma 143, 1-13.

Mestdagh I, Lootens P, Van Cleemput O and Carlier L (2004) Soil organic carbon stocks in Flemish grasslands: how accurate are they? Grass and Forage Science 59, 310-317.

MIRA (2005). Milieurapport Vlaanderen, Achtergronddocument 2005, Transport. Vlaamse Milieumaatschappij,

www.milieurapport.be.

MIRA (2008) Milieurapport Vlaanderen, Achtergronddocument 2007 Klimaatverandering. Brouwers J., De Nocker L., Schoeters K., Moorkens I., Jespers K., Vlaamse Milieumaatschappij, www.milieurapport.be

Nabuurs GJ, Schelhaas MJ, Mohren GMJ, Field CB (2003) Temporal evolution of the European forest sector carbon sink from 1950 to 1999. Global Change Biology 9, 152-160.

Nabuurs GJ, Dolman AJ, Verkaik E, Kuikman PJ, van Diepen CA, Whitmore AP, Daamen WP, Oenema O, Kabat P, Mohren GMJ (2000) Article 3.3 and 3.4 of the Kyoto Protocol: consequences for industrialised countries' commitment, the monitoring needs, and possible side effects. Environmental Science and Policy 3, 123-134.

Nakicenovic, N., Alcamo, J., Davis, G., de Vries, B., Fenhann, J., and et al. (2000) Special report on emissions scenarios. Cambridge, Cambridge University Press.

Neftel A., Friedli E., Moor H., Lötscher H., Oeschger U., Siegenthaler U., & Stauffer B. (1994) Historical CO2 record from the Siple station ice core. In: Boden T.A. et al. Trends '93: A Compendium of Data on Global Change. p. 11-14.

Norby RJ, Hanson PJ, O'neill EG, Tschaplinski TJ, Weltzin JF, Hansen RA, Cheng WX, Wullschleger SD, Gunderson CA, Edwards NT, Johnson DW (2002) Net primary productivity of a CO2 -enriched deciduous forest and the implications for carbon storage. Ecological Applications 12, 1261-1266.

Oren R, Ellsworth DS, Johnsen KH, Phillips N, Ewers BE, Maier C, Schafer KVR, McCarthy H, Hendrey GR, McNulty SG, Katul G (2001) Soil fertility limits carbon sequestration by forest ecosystems in a CO₂-enriched atmosphere. Nature 411, 469–472. Prentice I C (2001) The carbon cycle and atmospheric carbon dioxide. In Climate Change 2001: The Scientific Basis. Ed. IPCC. pp 183-237. Cambridge University Press, Cambridge, UK.

Schlesinger W and Lichter J. (2001) Limited carbon storage in soil and litter of experimental forest plots under elevated atmospheric CO₂. Nature 411, 466-469.

Siegenthaler U. & Wenk T. (1988) A box model for CO2 in the Equatorial Pacific-Ocean and variations with ENSO. Chemical Geology 70, 203-203.

Sleutel S, De Neve S, Hofman G(2003) Estimates of carbon stock changes in Belgian cropland. Soil Use and Management 19, 166-171.

Tol Richard S.J. (2005) The marginal damage costs of carbon dioxide emissions: an assessment of the uncertainties. Energy policy 33, 2064-2074.

Vande Walle I, Van Camp N, Perrin D, Lemeur R, Verheyen K, Van Wesemael B, Laitat E (2005) Growing stock-based assessment of the carbon stock in the Belgian forest biomass. Annals of Forest Science 62, 853-864.

Vandenbygaart AJ, Gregorich EG, Angers DA, Stoklas UF (2004) Uncertainty analysis of soil organic carbon stock change in Canadian cropland from 1991 to 2001. Global Change Biology 10, 983-994.

VITO-RA-IMC 2004. VITO en Tijdelijke vereniging Resource Analysis – IMDC, Maatschappelijke kosten-batenanalyse voor de actualisatie van het Sigmaplan, studie in opdracht van AWZ, afdeling Zeeschelde), September 2004

Watkiss P., Downing T.E., Anthoff D., Butterfield B., Ceronsky M., Grubb M., Guo J., Hepburn C., Hope C., Hunt A., Li A., Markandya A., Moss S., Nyong A. & Tol R.S.J. (2005) Scoping Uncertainty in the Social Cost of Carbon. Final Project Report, Social Cost of Carbon: A Closer look at Uncertainty, Department of Environment, Food and Rural Affairs, London.

World Resources Institute (WRI) / Carbon Dioxide Information Analysis Center (CDIAC) (2005) Carbon Dioxide Emissions by Source.

Hoofdstuk IV. Cyclering van stikstof en fosfor in