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Volumn 287, Issue , 2014, Pages 44-57

Toward more robust projections of forest landscape dynamics under novel environmental conditions: Embedding PnET within LANDIS-II

Author keywords

Carbon sequestration; Climate change; Forest landscape model; LANDIS II; PnET II; Tree competition model

Indexed keywords

CARBON DIOXIDE; CLIMATE CHANGE; ECOLOGY; PHYSIOLOGICAL MODELS; PHYSIOLOGY; SUN;

EID: 84901787499     PISSN: 03043800     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ecolmodel.2014.05.004     Document Type: Article
Times cited : (75)

References (71)
  • 1
    • 0027019215 scopus 로고
    • A generalized, lumped-parameter model of photosynthesis, evapotranspiration and net primary production in temperate and boreal forest ecosystems
    • Aber J.D., Federer A.C. A generalized, lumped-parameter model of photosynthesis, evapotranspiration and net primary production in temperate and boreal forest ecosystems. Oecologia 1992, 92:463-474.
    • (1992) Oecologia , vol.92 , pp. 463-474
    • Aber, J.D.1    Federer, A.C.2
  • 3
    • 0029775952 scopus 로고    scopus 로고
    • 2 exchange to the canopy: a generalized model of forest photosynthesis validated by eddy correlation
    • 2 exchange to the canopy: a generalized model of forest photosynthesis validated by eddy correlation. Oecologia 1996, 106:257-265.
    • (1996) Oecologia , vol.106 , pp. 257-265
    • Aber, J.D.1    Reich, P.B.2    Goulden, M.L.3
  • 4
    • 0031966545 scopus 로고    scopus 로고
    • The red maple paradox
    • Abrams M.D. The red maple paradox. Bioscience 1998, 48:355-364.
    • (1998) Bioscience , vol.48 , pp. 355-364
    • Abrams, M.D.1
  • 6
    • 0038356401 scopus 로고    scopus 로고
    • Global synthesis of leaf area index observations: implications for ecological and remote sensing studies
    • Asner G.P., Scurlock J.M.O., Hicke J.A. Global synthesis of leaf area index observations: implications for ecological and remote sensing studies. Glob. Ecol. Biogeogr. 2003, 12:191-205.
    • (2003) Glob. Ecol. Biogeogr. , vol.12 , pp. 191-205
    • Asner, G.P.1    Scurlock, J.M.O.2    Hicke, J.A.3
  • 8
    • 0032453385 scopus 로고    scopus 로고
    • Temperature and water-use efficiency by lucerne (Medicago sativa) sheltered by a tree windbreak in Tunisia
    • Benzarti J. Temperature and water-use efficiency by lucerne (Medicago sativa) sheltered by a tree windbreak in Tunisia. Agrofor. Syst. 1999, 43:95-108.
    • (1999) Agrofor. Syst. , vol.43 , pp. 95-108
    • Benzarti, J.1
  • 9
    • 0000620104 scopus 로고
    • Rationale, limitations, and assumptions of a northeastern forest growth simulator
    • Botkin D.B., Janak J.F., Wallis J.R. Rationale, limitations, and assumptions of a northeastern forest growth simulator. IBM J. Res. Dev. 1972, 16:101-116.
    • (1972) IBM J. Res. Dev. , vol.16 , pp. 101-116
    • Botkin, D.B.1    Janak, J.F.2    Wallis, J.R.3
  • 12
    • 79952045427 scopus 로고    scopus 로고
    • Mechanisms of age-related changes in forest production: the influence of physiological and successional changes
    • Drake J.E., Davis S.C., Raetz L.M., DeLucia E.H. Mechanisms of age-related changes in forest production: the influence of physiological and successional changes. Glob. Change Biol. 2011, 17:1522-1535.
    • (2011) Glob. Change Biol. , vol.17 , pp. 1522-1535
    • Drake, J.E.1    Davis, S.C.2    Raetz, L.M.3    DeLucia, E.H.4
  • 14
    • 79751521176 scopus 로고    scopus 로고
    • Evolutionarily stable strategy carbon allocation to foliage, wood, and fine roots in trees competing for light and nitrogen: an analytically tractable, individual-based model and quantitative comparisons to data
    • Dybzinski R., Farrior C., Wolf A., Reich P.B., Pacala S.W. Evolutionarily stable strategy carbon allocation to foliage, wood, and fine roots in trees competing for light and nitrogen: an analytically tractable, individual-based model and quantitative comparisons to data. Am. Nat. 2011, 177:153-166.
    • (2011) Am. Nat. , vol.177 , pp. 153-166
    • Dybzinski, R.1    Farrior, C.2    Wolf, A.3    Reich, P.B.4    Pacala, S.W.5
  • 15
    • 80051805480 scopus 로고    scopus 로고
    • Change in oak abundance in the eastern United States from 1980 to 2008
    • Fei S., Kong N., Steiner K.C., Moser W.K., Steiner E.B. Change in oak abundance in the eastern United States from 1980 to 2008. For. Ecol. Manag. 2011, 262:1370-1377.
    • (2011) For. Ecol. Manag. , vol.262 , pp. 1370-1377
    • Fei, S.1    Kong, N.2    Steiner, K.C.3    Moser, W.K.4    Steiner, E.B.5
  • 17
    • 84901813911 scopus 로고    scopus 로고
    • Forest insect defoliation and carbon dynamics: simulating multiple defoliators in temperate landscapes with LANDIS-II
    • (submitted for publication)
    • Foster J.R., Scheller R.M., Sturtevant B.R., Townsend P.A., Mladenoff D.J. Forest insect defoliation and carbon dynamics: simulating multiple defoliators in temperate landscapes with LANDIS-II. Ecol. Appl. 2014, (submitted for publication).
    • (2014) Ecol. Appl.
    • Foster, J.R.1    Scheller, R.M.2    Sturtevant, B.R.3    Townsend, P.A.4    Mladenoff, D.J.5
  • 18
    • 0030460209 scopus 로고    scopus 로고
    • Aboveground net primary production decline with stand age: potential causes
    • Gower S.T., McMurtrieb R.E., Murty D. Aboveground net primary production decline with stand age: potential causes. Trees 1996, 11:378-382.
    • (1996) Trees , vol.11 , pp. 378-382
    • Gower, S.T.1    McMurtrieb, R.E.2    Murty, D.3
  • 19
    • 0036202456 scopus 로고    scopus 로고
    • Microclimatic and soil moisture responses to gap formation in coastal Douglas-fir forests
    • Gray A.N., Spies T.A., Easter M.J. Microclimatic and soil moisture responses to gap formation in coastal Douglas-fir forests. Can. J. For. Res. 2002, 32:332-343.
    • (2002) Can. J. For. Res. , vol.32 , pp. 332-343
    • Gray, A.N.1    Spies, T.A.2    Easter, M.J.3
  • 21
    • 84884819418 scopus 로고    scopus 로고
    • When the past can't be used to predict the future: using mechanistic models to predict landscape ecological dynamics in a changing world
    • Gustafson E.J. When the past can't be used to predict the future: using mechanistic models to predict landscape ecological dynamics in a changing world. Landsc. Ecol. 2013, 28:1429-1437.
    • (2013) Landsc. Ecol. , vol.28 , pp. 1429-1437
    • Gustafson, E.J.1
  • 23
    • 77950888560 scopus 로고    scopus 로고
    • Predicting global change effects on forest biomass and composition in south-central Siberia
    • Gustafson E.J., Shvidenko A.Z., Sturtevant B.R., Scheller R.M. Predicting global change effects on forest biomass and composition in south-central Siberia. Ecol. Appl. 2010, 20:700-715.
    • (2010) Ecol. Appl. , vol.20 , pp. 700-715
    • Gustafson, E.J.1    Shvidenko, A.Z.2    Sturtevant, B.R.3    Scheller, R.M.4
  • 24
    • 84888004955 scopus 로고    scopus 로고
    • Scaling Aspen-FACE experimental results to century and landscape scales
    • Gustafson E.J., Kubiske M.E., Sturtevant B.R., Miranda B.R. Scaling Aspen-FACE experimental results to century and landscape scales. Landsc. Ecol. 2013, 28:1785-1800.
    • (2013) Landsc. Ecol. , vol.28 , pp. 1785-1800
    • Gustafson, E.J.1    Kubiske, M.E.2    Sturtevant, B.R.3    Miranda, B.R.4
  • 25
    • 38349094174 scopus 로고    scopus 로고
    • Forest landscape models: definitions, characterization, and classification
    • He H.S. Forest landscape models: definitions, characterization, and classification. For. Ecol. Manag. 2008, 254:484-498.
    • (2008) For. Ecol. Manag. , vol.254 , pp. 484-498
    • He, H.S.1
  • 26
    • 0032897055 scopus 로고    scopus 로고
    • Spatially explicit and stochastic simulation of forest landscape fire disturbance and succession
    • He H.S., Mladenoff D.J. Spatially explicit and stochastic simulation of forest landscape fire disturbance and succession. Ecology 1999, 80:81-99.
    • (1999) Ecology , vol.80 , pp. 81-99
    • He, H.S.1    Mladenoff, D.J.2
  • 27
    • 0041848571 scopus 로고    scopus 로고
    • Non-structural carbon compounds in temperate forest trees
    • Hoch G., Richter A., Körner C. Non-structural carbon compounds in temperate forest trees. Plant Cell Environ. 2003, 26:1067-1081.
    • (2003) Plant Cell Environ. , vol.26 , pp. 1067-1081
    • Hoch, G.1    Richter, A.2    Körner, C.3
  • 28
    • 15944399349 scopus 로고    scopus 로고
    • 2 production and transport in Duke Forest using a process-based modeling approach
    • 2 production and transport in Duke Forest using a process-based modeling approach. Glob. Biochem. Cycles 2004, 18:GB4029. 10.1029/2004GB002297.
    • (2004) Glob. Biochem. Cycles , vol.18
    • Hui, D.1    Luo, Y.2
  • 30
    • 0004126736 scopus 로고
    • Texas A&M University Press, College Station, C.A. Jones, J.R. Kiniry (Eds.)
    • CERES-Maize: A Simulation Model of Maize Growth and Development 1986, Texas A&M University Press, College Station, 194 pp. C.A. Jones, J.R. Kiniry (Eds.).
    • (1986) CERES-Maize: A Simulation Model of Maize Growth and Development , pp. 194
  • 32
    • 84901796863 scopus 로고    scopus 로고
    • Representing climate, disturbance, and vegetation interactions in landscape simulation models
    • (submitted for publication)
    • Keane R.E., Miller C., Smithwick E., McKenzie D., Falk D., Kellogg L. Representing climate, disturbance, and vegetation interactions in landscape simulation models. Landsc. Ecol. 2014, (submitted for publication).
    • (2014) Landsc. Ecol.
    • Keane, R.E.1    Miller, C.2    Smithwick, E.3    McKenzie, D.4    Falk, D.5    Kellogg, L.6
  • 33
    • 34547975363 scopus 로고    scopus 로고
    • The global relationship between forest productivity and biomass
    • Keeling H.C., Phillips O.L. The global relationship between forest productivity and biomass. Glob. Ecol. Biogeogr. 2007, 16:618-631.
    • (2007) Glob. Ecol. Biogeogr. , vol.16 , pp. 618-631
    • Keeling, H.C.1    Phillips, O.L.2
  • 34
    • 84901798324 scopus 로고    scopus 로고
    • Forest microclimate modelling using gap and canopy properties
    • Latif A., Blackburn G.A. Forest microclimate modelling using gap and canopy properties. SilviLaser 2008, 151-158.
    • (2008) SilviLaser , pp. 151-158
    • Latif, A.1    Blackburn, G.A.2
  • 36
    • 0001352793 scopus 로고    scopus 로고
    • Water use efficiency of short-rotation Salix viminalis at leaf, tree and stand scales
    • Lindroth A., Ciencials E. Water use efficiency of short-rotation Salix viminalis at leaf, tree and stand scales. Tree Physiol. 1996, 16:257-262.
    • (1996) Tree Physiol. , vol.16 , pp. 257-262
    • Lindroth, A.1    Ciencials, E.2
  • 37
    • 33750620506 scopus 로고    scopus 로고
    • TreeMig: a forest-landscape model for simulating spatio-temporal patterns from stand to landscape scale
    • Lischke H., Zimmermann N.E., Bolliger J., Rickebusch S., Loffler T.J. TreeMig: a forest-landscape model for simulating spatio-temporal patterns from stand to landscape scale. Ecol. Model. 2006, 199:409-420.
    • (2006) Ecol. Model. , vol.199 , pp. 409-420
    • Lischke, H.1    Zimmermann, N.E.2    Bolliger, J.3    Rickebusch, S.4    Loffler, T.J.5
  • 39
    • 46749103382 scopus 로고    scopus 로고
    • Competitive success of natural oak regeneration in clearcuts during the stem exclusion stage
    • Morrissey R.C., Jacobs D.F., Seifert J.R., Fischer B.C., Kershaw J.A. Competitive success of natural oak regeneration in clearcuts during the stem exclusion stage. Can. J. For. Res. 2008, 38:1419-1430.
    • (2008) Can. J. For. Res. , vol.38 , pp. 1419-1430
    • Morrissey, R.C.1    Jacobs, D.F.2    Seifert, J.R.3    Fischer, B.C.4    Kershaw, J.A.5
  • 41
    • 0033891931 scopus 로고    scopus 로고
    • Root dynamics and global change: seeking an ecosystem perspective
    • Norby R.J., Jackson R.B. Root dynamics and global change: seeking an ecosystem perspective. New Phytol. 2000, 147:3-12.
    • (2000) New Phytol. , vol.147 , pp. 3-12
    • Norby, R.J.1    Jackson, R.B.2
  • 42
    • 49149139946 scopus 로고
    • Forest development in North America following major disturbances
    • Oliver C.D. Forest development in North America following major disturbances. For. Ecol. Manag. 1981, 3:153-168.
    • (1981) For. Ecol. Manag. , vol.3 , pp. 153-168
    • Oliver, C.D.1
  • 43
    • 0003438851 scopus 로고    scopus 로고
    • John Wiley and Sons, Inc., New York, NY
    • Oliver C.D., Larson B.C. Forest Stand Dynamics 1996, John Wiley and Sons, Inc., New York, NY, 521 pp. Update edition.
    • (1996) Forest Stand Dynamics , pp. 521
    • Oliver, C.D.1    Larson, B.C.2
  • 45
    • 0028571355 scopus 로고
    • A general model for soil organic matter dynamics: sensitivity to litter chemistry, texture and management
    • Soil Sci. Soc. Am, Madison, WI, R.B. Bryant, R.W. Arnoldm (Eds.)
    • Parton W.J., Ojima D.S., Cole C.V., Schimel D.S. A general model for soil organic matter dynamics: sensitivity to litter chemistry, texture and management. Quantitative Modeling of Soil Forming Processes 1994, 147-167. Soil Sci. Soc. Am, Madison, WI. R.B. Bryant, R.W. Arnoldm (Eds.).
    • (1994) Quantitative Modeling of Soil Forming Processes , pp. 147-167
    • Parton, W.J.1    Ojima, D.S.2    Cole, C.V.3    Schimel, D.S.4
  • 48
    • 0025601210 scopus 로고
    • Fire affects ecophysiology and community dynamics of central Wisconsin oak forest regeneration
    • Reich P.B., Abrams M.D., Ellsworth D.S., Kruger E.L., Tabone T.J. Fire affects ecophysiology and community dynamics of central Wisconsin oak forest regeneration. Ecology 1990, 71:2179-2190.
    • (1990) Ecology , vol.71 , pp. 2179-2190
    • Reich, P.B.1    Abrams, M.D.2    Ellsworth, D.S.3    Kruger, E.L.4    Tabone, T.J.5
  • 51
    • 4544350698 scopus 로고    scopus 로고
    • A forest growth and biomass module for a landscape simulation model, LANDIS: design, validation, and application
    • Scheller R.M., Mladenoff D.J. A forest growth and biomass module for a landscape simulation model, LANDIS: design, validation, and application. Ecol. Model. 2004, 180:211-229.
    • (2004) Ecol. Model. , vol.180 , pp. 211-229
    • Scheller, R.M.1    Mladenoff, D.J.2
  • 52
    • 34248377754 scopus 로고    scopus 로고
    • An ecological classification of forest landscape simulation models: tools and strategies for understanding broad-scale forested ecosystems
    • Scheller R.M., Mladenoff D.J. An ecological classification of forest landscape simulation models: tools and strategies for understanding broad-scale forested ecosystems. Landsc. Ecol. 2007, 22:491-505.
    • (2007) Landsc. Ecol. , vol.22 , pp. 491-505
    • Scheller, R.M.1    Mladenoff, D.J.2
  • 54
    • 33846692695 scopus 로고    scopus 로고
    • Design, development, and application of LANDIS-II, a spatial landscape simulation model with flexible temporal and spatial resolution
    • Scheller R.M., Domingo J.B., Sturtevant B.R., Williams J.S., Rudy A., Gustafson E.J., Mladenoff D.J. Design, development, and application of LANDIS-II, a spatial landscape simulation model with flexible temporal and spatial resolution. Ecol. Model. 2007, 201:409-419.
    • (2007) Ecol. Model. , vol.201 , pp. 409-419
    • Scheller, R.M.1    Domingo, J.B.2    Sturtevant, B.R.3    Williams, J.S.4    Rudy, A.5    Gustafson, E.J.6    Mladenoff, D.J.7
  • 55
    • 78049479216 scopus 로고    scopus 로고
    • The effects of forest harvest intensity in combination with wind disturbance on carbon dynamics in a Lake States mesic landscape
    • Scheller R.M., Hua D., Bolstad P.V., Birdsey R., Mladenoff D.J. The effects of forest harvest intensity in combination with wind disturbance on carbon dynamics in a Lake States mesic landscape. Ecol. Model. 2011, 222:144-153.
    • (2011) Ecol. Model. , vol.222 , pp. 144-153
    • Scheller, R.M.1    Hua, D.2    Bolstad, P.V.3    Birdsey, R.4    Mladenoff, D.J.5
  • 57
    • 16344390658 scopus 로고    scopus 로고
    • Relationships between net photosynthesis and foliar nitrogen concentrations in a loblolly pine forest ecosystem grown in elevated atmospheric carbon dioxide
    • Springer C.J., DeLucia E.H., Thomas R.B. Relationships between net photosynthesis and foliar nitrogen concentrations in a loblolly pine forest ecosystem grown in elevated atmospheric carbon dioxide. Tree Physiol. 2005, 25:385-394.
    • (2005) Tree Physiol. , vol.25 , pp. 385-394
    • Springer, C.J.1    DeLucia, E.H.2    Thomas, R.B.3
  • 58
    • 1542576174 scopus 로고    scopus 로고
    • Comparing estimates of forest site quality in old second-growth oak forests
    • Sturtevant B.R., Seagle S.W. Comparing estimates of forest site quality in old second-growth oak forests. For. Ecol. Manag. 2004, 191:311-328.
    • (2004) For. Ecol. Manag. , vol.191 , pp. 311-328
    • Sturtevant, B.R.1    Seagle, S.W.2
  • 59
    • 4544244061 scopus 로고    scopus 로고
    • Modeling biological disturbances in LANDIS: a module description and demonstration using spruce budworm
    • Sturtevant B.R., Gustafson E.J., Li W., He H.S. Modeling biological disturbances in LANDIS: a module description and demonstration using spruce budworm. Ecol. Model. 2004, 180:153-174.
    • (2004) Ecol. Model. , vol.180 , pp. 153-174
    • Sturtevant, B.R.1    Gustafson, E.J.2    Li, W.3    He, H.S.4
  • 60
    • 70350465321 scopus 로고    scopus 로고
    • Simulating dynamic and mixed-severity fire regimes: a process-based fire extension for LANDIS-II
    • Sturtevant B.R., Scheller R.M., Miranda B.R., Shinneman D., Syphard A. Simulating dynamic and mixed-severity fire regimes: a process-based fire extension for LANDIS-II. Ecol. Model. 2009, 220:3380-3393.
    • (2009) Ecol. Model. , vol.220 , pp. 3380-3393
    • Sturtevant, B.R.1    Scheller, R.M.2    Miranda, B.R.3    Shinneman, D.4    Syphard, A.5
  • 61
    • 38849199261 scopus 로고    scopus 로고
    • Predicting global change impacts on plant species' distributions: future challenges
    • Thuiller W., et al. Predicting global change impacts on plant species' distributions: future challenges. Persp. Plant Ecol. Evol. Syst. 2008, 9:137-152.
    • (2008) Persp. Plant Ecol. Evol. Syst. , vol.9 , pp. 137-152
    • Thuiller, W.1
  • 62
    • 0042382985 scopus 로고    scopus 로고
    • Application of imaging spectroscopy to mapping canopy nitrogen in the forests of the central Appalachian Mountains using Hyperion and AVIRIS
    • Townsend P.A., Foster J.R., Chastain R.A., Currie W.S. Application of imaging spectroscopy to mapping canopy nitrogen in the forests of the central Appalachian Mountains using Hyperion and AVIRIS. IEEE Trans. Geosci. Remote Sens. 2003, 41:1347-1354.
    • (2003) IEEE Trans. Geosci. Remote Sens. , vol.41 , pp. 1347-1354
    • Townsend, P.A.1    Foster, J.R.2    Chastain, R.A.3    Currie, W.S.4
  • 63
    • 1642356845 scopus 로고    scopus 로고
    • Remote sensing of Gypsy moth defoliation to assess variations in stream nitrogen concentrations
    • Townsend P.A., Eshleman K.N., Welcker C. Remote sensing of Gypsy moth defoliation to assess variations in stream nitrogen concentrations. Ecol. Appl. 2004, 14:504-516.
    • (2004) Ecol. Appl. , vol.14 , pp. 504-516
    • Townsend, P.A.1    Eshleman, K.N.2    Welcker, C.3
  • 64
    • 58549106164 scopus 로고    scopus 로고
    • Shade tolerance, a key plant feature of complex nature and consequences
    • Valladares F., Niinemets U. Shade tolerance, a key plant feature of complex nature and consequences. Ann. Rev. Ecol. Evol. Syst. 2008, 39:237-257.
    • (2008) Ann. Rev. Ecol. Evol. Syst. , vol.39 , pp. 237-257
    • Valladares, F.1    Niinemets, U.2
  • 67
    • 84896698172 scopus 로고    scopus 로고
    • LANDIS PRO: a landscape model that predicts forest composition and structure changes at regional scales
    • Wang W.J., He H.S., Fraser J.S., Thompson F.R., Shifley S.R., Spetich M.A. LANDIS PRO: a landscape model that predicts forest composition and structure changes at regional scales. Ecography 2014, 37:1-5.
    • (2014) Ecography , vol.37 , pp. 1-5
    • Wang, W.J.1    He, H.S.2    Fraser, J.S.3    Thompson, F.R.4    Shifley, S.R.5    Spetich, M.A.6
  • 68
    • 0000956874 scopus 로고
    • Primary productivity and water use in native forest, grassland and desert ecosystems
    • Webb W., Szarek S., Lauenroth W., Kinerson R., Smith M. Primary productivity and water use in native forest, grassland and desert ecosystems. Ecology 1978, 6:1239-1247.
    • (1978) Ecology , vol.6 , pp. 1239-1247
    • Webb, W.1    Szarek, S.2    Lauenroth, W.3    Kinerson, R.4    Smith, M.5
  • 69
    • 0001880398 scopus 로고
    • Methods of assessing terrestrial productivity
    • Springer-Verlag, New York, H. Lieth, R.H. Whittaker (Eds.)
    • Whittaker R.H., Marks P.L. Methods of assessing terrestrial productivity. Primary Productivity of the Biosphere 1975, 55-117. Springer-Verlag, New York. H. Lieth, R.H. Whittaker (Eds.).
    • (1975) Primary Productivity of the Biosphere , pp. 55-117
    • Whittaker, R.H.1    Marks, P.L.2
  • 70
    • 35948950157 scopus 로고    scopus 로고
    • Novel climates, no-analog communities, and ecological surprises
    • Williams J.W., Jackson S.T. Novel climates, no-analog communities, and ecological surprises. Front. Ecol. Environ. 2007, 5:475-482.
    • (2007) Front. Ecol. Environ. , vol.5 , pp. 475-482
    • Williams, J.W.1    Jackson, S.T.2
  • 71
    • 58149484402 scopus 로고    scopus 로고
    • Uncertainty in the response of a forest landscape to global climatic change
    • Xu C., Gertner G.Z., Scheller R.M. Uncertainty in the response of a forest landscape to global climatic change. Glob. Change Biol. 2009, 15:116-213.
    • (2009) Glob. Change Biol. , vol.15 , pp. 116-213
    • Xu, C.1    Gertner, G.Z.2    Scheller, R.M.3


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