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Volumn 16, Issue 4, 1996, Pages 459-468

Hydraulic conductance, light interception and needle nutrient concentration in Scots pine stands and their relations with net primary productivity

Author keywords

Hydraulic architecture; Pinus sylvestris; Respiration costs; Transpiration

Indexed keywords


EID: 0000743221     PISSN: 0829318X     EISSN: None     Source Type: Journal    
DOI: 10.1093/treephys/16.5.459     Document Type: Article
Times cited : (141)

References (65)
  • 1
    • 0000959251 scopus 로고
    • Total tree production as compared to conventional forestry production
    • Structure and Function of Northern Coniferous Forests - An Ecosystem Study. Ed. T. Persson
    • Albrektson, A. 1980. Total tree production as compared to conventional forestry production. In Structure and Function of Northern Coniferous Forests - An Ecosystem Study. Ed. T. Persson. Ecol. Bull. 32:315-328.
    • (1980) Ecol. Bull. , vol.32 , pp. 315-328
    • Albrektson, A.1
  • 3
    • 0002580834 scopus 로고
    • Use of logarithmic regression in the estimation of plant biomass
    • Baskerville, G.L. 1972. Use of logarithmic regression in the estimation of plant biomass. Can. J. For. Res. 2:49-53.
    • (1972) Can. J. For. Res. , vol.2 , pp. 49-53
    • Baskerville, G.L.1
  • 4
    • 0023529014 scopus 로고
    • Uptake and accumulation of nitrogen in Pinus radiata stands as related to age and thinning
    • Beets, P.N. and D.S. Pollock. 1987. Uptake and accumulation of nitrogen in Pinus radiata stands as related to age and thinning. N.Z. J. For. Res. 17:353-371.
    • (1987) N.Z. J. For. Res. , vol.17 , pp. 353-371
    • Beets, P.N.1    Pollock, D.S.2
  • 5
    • 0028852438 scopus 로고
    • Nutrient supply and declines in leaf area and production in lodgepole pine
    • Binckley, D., F.W. Smith and Y. Son. 1995. Nutrient supply and declines in leaf area and production in lodgepole pine. Can. J. For. Res. 25:621-628.
    • (1995) Can. J. For. Res. , vol.25 , pp. 621-628
    • Binckley, D.1    Smith, F.W.2    Son, Y.3
  • 6
    • 0028163785 scopus 로고
    • Canopy light trasmittance in a chronosequence of mixed-species deciduous forests
    • Brown, M.J. and G.G. Parker. 1994. Canopy light trasmittance in a chronosequence of mixed-species deciduous forests. Can. J. For. Res. 24:1694-1703.
    • (1994) Can. J. For. Res. , vol.24 , pp. 1694-1703
    • Brown, M.J.1    Parker, G.G.2
  • 7
    • 0027069057 scopus 로고
    • Defining leaf area index for non-flat leaves
    • Chen, J.M. and T.A. Black. 1992. Defining leaf area index for non-flat leaves. Plant Cell Environ. 15:421-429.
    • (1992) Plant Cell Environ. , vol.15 , pp. 421-429
    • Chen, J.M.1    Black, T.A.2
  • 8
    • 0000797512 scopus 로고
    • Photosynthate allocation in Pinus taeda. I. Substrate requirements for synthesis of shoot biomass
    • Chung, H-H. and R.L. Barnes. 1977. Photosynthate allocation in Pinus taeda. I. Substrate requirements for synthesis of shoot biomass. Can. J. For. Res. 7:106-111.
    • (1977) Can. J. For. Res. , vol.7 , pp. 106-111
    • Chung, H.-H.1    Barnes, R.L.2
  • 10
    • 0003021463 scopus 로고
    • Bias in the leaf area-sapwood area ratios and its impact on growth analysis in Pinus contorta
    • Dean, T.J., J.N. Long and F.W. Smith. 1988. Bias in the leaf area-sapwood area ratios and its impact on growth analysis in Pinus contorta. Trees 2:104-109.
    • (1988) Trees , vol.2 , pp. 104-109
    • Dean, T.J.1    Long, J.N.2    Smith, F.W.3
  • 11
    • 0002230586 scopus 로고
    • Estimation of volume, total and projected area of Scots pine needles from their regression on length
    • Flower-Ellis, J.G.K. and L. Olsson. 1993. Estimation of volume, total and projected area of Scots pine needles from their regression on length. Stud. For. Suec. 190:1-19.
    • (1993) Stud. For. Suec. , vol.190 , pp. 1-19
    • Flower-Ellis, J.G.K.1    Olsson, L.2
  • 12
    • 0000562922 scopus 로고
    • Changes in gas exchange characteristics during the life span of giant sequoia: Implications for response to current and future concentrations of atmospheric ozone
    • Grulke, N.B. and P.R. Miller. 1994. Changes in gas exchange characteristics during the life span of giant sequoia: implications for response to current and future concentrations of atmospheric ozone. Tree Physiol. 14:659-668.
    • (1994) Tree Physiol. , vol.14 , pp. 659-668
    • Grulke, N.B.1    Miller, P.R.2
  • 13
    • 0000176606 scopus 로고
    • Field studies of water relations and photosynthesis in Scots pine using manual techniques
    • Structure and Function of Northern Coniferous Forests - An Ecosystem Study. Ed. T. Persson
    • Hellqvist, J., K. Hillerdal-Hagströmer and E. Mattson-Djos. 1980. Field studies of water relations and photosynthesis in Scots pine using manual techniques. In Structure and Function of Northern Coniferous Forests - An Ecosystem Study. Ed. T. Persson. Ecol. Bull. 32:183-204.
    • (1980) Ecol. Bull. , vol.32 , pp. 183-204
    • Hellqvist, J.1    Hillerdal-Hagströmer, K.2    Mattson-Djos, E.3
  • 14
    • 0016426979 scopus 로고
    • Water transfer in plants
    • Eds. D.A. de Vries and N.G. Afgan. Scripta Book Co., Washington, D.C.
    • Jarvis, P.G. 1975. Water transfer in plants. In Heat and Mass Transfer in the Plant Environment. Part 1. Eds. D.A. de Vries and N.G. Afgan. Scripta Book Co., Washington, D.C., pp 369-394.
    • (1975) Heat and Mass Transfer in the Plant Environment , Issue.1 PART , pp. 369-394
    • Jarvis, P.G.1
  • 15
    • 0004224779 scopus 로고
    • Cambridge Univ. Press, Cambridge, U.K.
    • Jones, H.G. 1992. Plants and microclimate. Cambridge Univ. Press, Cambridge, U.K., 428 p.
    • (1992) Plants and Microclimate
    • Jones, H.G.1
  • 16
    • 0003184479 scopus 로고
    • Physiographic, stand, and environmental effects on individual tree growth and growth efficiency in subalpine forests
    • Kaufmann, M.R. and M.G. Ryan. 1986. Physiographic, stand, and environmental effects on individual tree growth and growth efficiency in subalpine forests. Tree Physiol. 2:47-59.
    • (1986) Tree Physiol. , vol.2 , pp. 47-59
    • Kaufmann, M.R.1    Ryan, M.G.2
  • 17
    • 0001820455 scopus 로고
    • Partitioning evapotranspiration into tree and understory components in two young Pinus radiata D. Don stands
    • Kelliher, F.M., D. Whitehead, K.J. McAneney and M.J. Judd. 1990. Partitioning evapotranspiration into tree and understory components in two young Pinus radiata D. Don stands. Agric. For. Meteorol. 50:211-227.
    • (1990) Agric. For. Meteorol. , vol.50 , pp. 211-227
    • Kelliher, F.M.1    Whitehead, D.2    McAneney, K.J.3    Judd, M.J.4
  • 18
    • 0002922940 scopus 로고
    • Primary production and turnover of organic matter in different forest ecosystems of the western Pacific
    • Kira, T. and T. Shidei. 1967. Primary production and turnover of organic matter in different forest ecosystems of the western Pacific. Jpn. J. Ecol. 17:70-87.
    • (1967) Jpn. J. Ecol. , vol.17 , pp. 70-87
    • Kira, T.1    Shidei, T.2
  • 19
    • 84948630593 scopus 로고
    • Net photosynthetic response to light intensity of shoots from different crown positions and age in Picea abies (L.) Karst
    • Kull, O. and A. Koppel. 1987. Net photosynthetic response to light intensity of shoots from different crown positions and age in Picea abies (L.) Karst. Scand. J. For. Res. 2:157-166.
    • (1987) Scand. J. For. Res. , vol.2 , pp. 157-166
    • Kull, O.1    Koppel, A.2
  • 20
    • 0026278064 scopus 로고
    • Long-term development of needle mass, radiation interception and stemwood production in naturally regenerated Pinus sylvestris stands on Empetrum-Vaccinium site type in the northern boreal zone in Finland: An analysis based on an empirical study and simulation
    • Kuuluvainen, T. 1991. Long-term development of needle mass, radiation interception and stemwood production in naturally regenerated Pinus sylvestris stands on Empetrum-Vaccinium site type in the northern boreal zone in Finland: an analysis based on an empirical study and simulation. For. Ecol. Manage. 46:103-122.
    • (1991) For. Ecol. Manage. , vol.46 , pp. 103-122
    • Kuuluvainen, T.1
  • 21
    • 0001245874 scopus 로고
    • Application of some of Cauchy's theorems to estimation of surface area of leaves, needles, and branches of plants and light trasmittance
    • Lang, A.R.G. 1991. Application of some of Cauchy's theorems to estimation of surface area of leaves, needles, and branches of plants and light trasmittance. Agric. For. Meteorol. 55:191-212.
    • (1991) Agric. For. Meteorol. , vol.55 , pp. 191-212
    • Lang, A.R.G.1
  • 23
    • 0000580539 scopus 로고
    • The seasonal variation in stem and course root respiration of a 20-year-old Scots pine (Pinus sylvestris L.)
    • Linder, S. and E. Troeng. 1981. The seasonal variation in stem and course root respiration of a 20-year-old Scots pine (Pinus sylvestris L.). Mittl. Forstl. Bundesvers. Wien 142:125-139.
    • (1981) Mittl. Forstl. Bundesvers. Wien , vol.142 , pp. 125-139
    • Linder, S.1    Troeng, E.2
  • 24
    • 0344874969 scopus 로고
    • Volume increments in Pinus contorta var. latifolia: The influence of stand development and crown dynamics
    • Long, J.N. and F.W. Smith. 1992. Volume increments in Pinus contorta var. latifolia: the influence of stand development and crown dynamics. For. Ecol. Manage. 53:53-64.
    • (1992) For. Ecol. Manage. , vol.53 , pp. 53-64
    • Long, J.N.1    Smith, F.W.2
  • 25
    • 0002449752 scopus 로고
    • The use of pressure bomb and porometer for describing plant water stress in tree seedlings
    • Ed. P. Puttonen. Dept. Silviculture, Univ. Helsinki, Finland
    • Mattson-Djos, E. 1981. The use of pressure bomb and porometer for describing plant water stress in tree seedlings. In Proc. Nordic Symp. on Vitality and Quality of Nursery Stock. Ed. P. Puttonen. Dept. Silviculture, Univ. Helsinki, Finland, pp 45-57.
    • (1981) Proc. Nordic Symp. on Vitality and Quality of Nursery Stock , pp. 45-57
    • Mattson-Djos, E.1
  • 27
    • 0029104599 scopus 로고
    • Climate influences the leaf area/sapwood area ratio in Scots pine
    • Mencuccini, M. and J. Grace. 1995. Climate influences the leaf area/sapwood area ratio in Scots pine. Tree Physiol. 15:1-10.
    • (1995) Tree Physiol. , vol.15 , pp. 1-10
    • Mencuccini, M.1    Grace, J.2
  • 28
    • 0030483784 scopus 로고    scopus 로고
    • Developmental patterns of above-ground hydraulic conductance in a Scots pine (Pinus sylvestris L.) age sequence
    • In press
    • Mencuccini, M. and J. Grace. 1996. Developmental patterns of above-ground hydraulic conductance in a Scots pine (Pinus sylvestris L.) age sequence. Plant Cell Environ. In press.
    • (1996) Plant Cell Environ.
    • Mencuccini, M.1    Grace, J.2
  • 29
    • 0001516057 scopus 로고
    • The influence of stand development on nutrient demand, growth and allocation
    • Miller, H.G. 1995. The influence of stand development on nutrient demand, growth and allocation. Plant Soil 168/169:225-232.
    • (1995) Plant Soil , vol.168-169 , pp. 225-232
    • Miller, H.G.1
  • 30
    • 0001903945 scopus 로고
    • Nutritional requirements of Sitka spruce
    • Miller, H.G. and J.D. Miller. 1987. Nutritional requirements of Sitka spruce. Proc. R. Soc. Edinb. 93B:75-83.
    • (1987) Proc. R. Soc. Edinb. , vol.93 B , pp. 75-83
    • Miller, H.G.1    Miller, J.D.2
  • 31
    • 34548430117 scopus 로고
    • A theoretical analysis of the frequency of gaps in plant stands
    • Nilson, T. 1971. A theoretical analysis of the frequency of gaps in plant stands. Agric. Meteorol. 8:25-38.
    • (1971) Agric. Meteorol. , vol.8 , pp. 25-38
    • Nilson, T.1
  • 32
    • 4244101561 scopus 로고
    • 15N in young trees of Scots pine and Norway spruce
    • 15N in young trees of Scots pine and Norway spruce. Stud. For. Suec. 35:1-18.
    • (1966) Stud. For. Suec. , vol.35 , pp. 1-18
    • Nommik, H.1
  • 33
    • 0001268840 scopus 로고
    • Radiative transfer in an array of canopies
    • Norman, J.M. and J.M. Welles. 1983. Radiative transfer in an array of canopies. Agron. J. 75:481-488.
    • (1983) Agron. J. , vol.75 , pp. 481-488
    • Norman, J.M.1    Welles, J.M.2
  • 34
    • 77956982428 scopus 로고
    • Dry matter production by Pinus sylvestris
    • Ovington, J.D. 1957. Dry matter production by Pinus sylvestris. Ann. Bot. 21:287-314.
    • (1957) Ann. Bot. , vol.21 , pp. 287-314
    • Ovington, J.D.1
  • 35
    • 0001513270 scopus 로고
    • Frictional potential losses and total water potential in plants: A re-evaluation
    • Richter, H. 1973. Frictional potential losses and total water potential in plants: a re-evaluation. J. Exp. Bot. 24:983-994.
    • (1973) J. Exp. Bot. , vol.24 , pp. 983-994
    • Richter, H.1
  • 36
    • 0021537065 scopus 로고
    • Factors affecting stomatal conductance of bracken below a forest canopy
    • Roberts, J., J.S. Wallace and R.M. Pitman. 1984. Factors affecting stomatal conductance of bracken below a forest canopy. J. Appi. Ecol. 21:643-656.
    • (1984) J. Appi. Ecol. , vol.21 , pp. 643-656
    • Roberts, J.1    Wallace, J.S.2    Pitman, R.M.3
  • 37
    • 0000925971 scopus 로고
    • Seasonal changes in leaf area, stomatal and canopy conductances and transpiration from bracken below a forest canopy
    • Roberts, J., C.F. Pymar, J.S. Wallace and R.M. Pitman. 1980. Seasonal changes in leaf area, stomatal and canopy conductances and transpiration from bracken below a forest canopy. J. Appl. Ecol. 17:409-422.
    • (1980) J. Appl. Ecol. , vol.17 , pp. 409-422
    • Roberts, J.1    Pymar, C.F.2    Wallace, J.S.3    Pitman, R.M.4
  • 38
    • 0025244857 scopus 로고
    • Growth and maintenance respiration in stems of Pinus contorta and Picea engelmannii
    • Ryan. M.G. 1990. Growth and maintenance respiration in stems of Pinus contorta and Picea engelmannii. Can. J. For. Res. 20:48-57.
    • (1990) Can. J. For. Res. , vol.20 , pp. 48-57
    • Ryan, M.G.1
  • 39
    • 0025994572 scopus 로고
    • Effects of climate change on plant respiration
    • Ryan, M.G. 1991a. Effects of climate change on plant respiration. Ecol. Appl. 1:157-167.
    • (1991) Ecol. Appl. , vol.1 , pp. 157-167
    • Ryan, M.G.1
  • 40
    • 0026340419 scopus 로고
    • A simple method for estimating gross carbon budgets for vegetation in forest ecosystems
    • Ryan. M.G. 1991b. A simple method for estimating gross carbon budgets for vegetation in forest ecosystems. Tree Physiol. 9:255-266.
    • (1991) Tree Physiol. , vol.9 , pp. 255-266
    • Ryan, M.G.1
  • 41
    • 0027045419 scopus 로고
    • Maintenance respiration and stand development in a subalpine lodgepole pine forest
    • Ryan, M.G. and R.H. Waring. 1992. Maintenance respiration and stand development in a subalpine lodgepole pine forest. Ecology 73:2100-2108.
    • (1992) Ecology , vol.73 , pp. 2100-2108
    • Ryan, M.G.1    Waring, R.H.2
  • 44
    • 0029159166 scopus 로고
    • Influence of leaf water status on stomatal response to humidity, hydraulic conductance, and soil drought in Betula occidentalis
    • Saliendra, N.Z., J.S. Sperry and J. Comstock. 1995. Influence of leaf water status on stomatal response to humidity, hydraulic conductance, and soil drought in Betula occidentalis. Planta 196:357-366.
    • (1995) Planta , vol.196 , pp. 357-366
    • Saliendra, N.Z.1    Sperry, J.S.2    Comstock, J.3
  • 45
    • 0029107935 scopus 로고
    • Direct and indirect estimates of leaf area index (LAI) for lodgepole and loblolly pine stands
    • Sampson, D.A. and H.L. Allen. 1995. Direct and indirect estimates of leaf area index (LAI) for lodgepole and loblolly pine stands. Trees 9:119-122.
    • (1995) Trees , vol.9 , pp. 119-122
    • Sampson, D.A.1    Allen, H.L.2
  • 46
    • 0027388103 scopus 로고
    • Influence of canopy architecture on light penetration in lodgepole pine (Pinus contorta var. latifolia) forests
    • Sampson, D.A. and F.W. Smith. 1993. Influence of canopy architecture on light penetration in lodgepole pine (Pinus contorta var. latifolia) forests. Agric. For. Meteorol. 64:63-79.
    • (1993) Agric. For. Meteorol. , vol.64 , pp. 63-79
    • Sampson, D.A.1    Smith, F.W.2
  • 47
    • 0000708792 scopus 로고
    • Influence of tree size on shoot structure and physiology of Pinus contorta and Pinus aristata
    • Schoettle, A.W. 1994. Influence of tree size on shoot structure and physiology of Pinus contorta and Pinus aristata. Tree Physiol. 14:1055-1068.
    • (1994) Tree Physiol. , vol.14 , pp. 1055-1068
    • Schoettle, A.W.1
  • 48
    • 0000949812 scopus 로고
    • Effects of clumping on estimates of stand leaf area index using the Li-Cor LAI-2000
    • Smith, N.J., J.M. Chen and T.A. Black. 1993. Effects of clumping on estimates of stand leaf area index using the Li-Cor LAI-2000. Can. J. For. Res. 23:1940-1943.
    • (1993) Can. J. For. Res. , vol.23 , pp. 1940-1943
    • Smith, N.J.1    Chen, J.M.2    Black, T.A.3
  • 49
    • 0000854167 scopus 로고
    • Comparison of leaf area index estimates from tree allometrics and measured light interception
    • Smith, F.W., D.A. Sampson and J.N. Long. 1991. Comparison of leaf area index estimates from tree allometrics and measured light interception. For. Sci. 37:1682-1688.
    • (1991) For. Sci. , vol.37 , pp. 1682-1688
    • Smith, F.W.1    Sampson, D.A.2    Long, J.N.3
  • 50
    • 0000896776 scopus 로고
    • Dependence of light interception efficiency of Scots pine shoots on structural parameters
    • Smolander, H., P. Stenberg and S. Linder. 1994. Dependence of light interception efficiency of Scots pine shoots on structural parameters. Tree Physiol. 14:971-980.
    • (1994) Tree Physiol. , vol.14 , pp. 971-980
    • Smolander, H.1    Stenberg, P.2    Linder, S.3
  • 51
    • 0000340326 scopus 로고
    • Correcting for bias in log-transformed allometric equations
    • Sprugel, D.G. 1983. Correcting for bias in log-transformed allometric equations. Ecology 64:209-210.
    • (1983) Ecology , vol.64 , pp. 209-210
    • Sprugel, D.G.1
  • 52
    • 0001933107 scopus 로고
    • Components of wood-tissue respiration in young Abies amabilis trees
    • Sprugel, D.G. 1990. Components of wood-tissue respiration in young Abies amabilis trees. Trees 4:88-98.
    • (1990) Trees , vol.4 , pp. 88-98
    • Sprugel, D.G.1
  • 54
    • 0002396167 scopus 로고
    • Performance of the LAI-2000 plant canopy analyzer in estimating leaf area index of some Scots pine stands
    • Stenberg, P., S. Linder, H. Smolander and J. Flower-Ellis. 1994. Performance of the LAI-2000 plant canopy analyzer in estimating leaf area index of some Scots pine stands. Tree Physiol. 14:981-995.
    • (1994) Tree Physiol. , vol.14 , pp. 981-995
    • Stenberg, P.1    Linder, S.2    Smolander, H.3    Flower-Ellis, J.4
  • 55
    • 0001171365 scopus 로고
    • Factors affecting the canopy resistance of a Douglas-fir forest
    • Tan, C.S. and T.A. Black. 1976. Factors affecting the canopy resistance of a Douglas-fir forest. Boundary-Layer Meteorol. 10:475-488.
    • (1976) Boundary-Layer Meteorol. , vol.10 , pp. 475-488
    • Tan, C.S.1    Black, T.A.2
  • 56
    • 84986927503 scopus 로고
    • The hydraulic architecture of trees and other woody plants
    • Tyree, M.T. and F.W. Ewers. 1991. The hydraulic architecture of trees and other woody plants. New Phytol. 119:345-360.
    • (1991) New Phytol. , vol.119 , pp. 345-360
    • Tyree, M.T.1    Ewers, F.W.2
  • 58
    • 0000090273 scopus 로고
    • Relationship between net photosynthesis and nitrogen in Scots pine: Seasonal variation in seedlings and shoots
    • Vapaavuori, E.M., A.H. Vuorinen, P.J. Aphalo and H. Smolander. 1995. Relationship between net photosynthesis and nitrogen in Scots pine: seasonal variation in seedlings and shoots. Plant Soil 168/169:263-270.
    • (1995) Plant Soil , vol.168-169 , pp. 263-270
    • Vapaavuori, E.M.1    Vuorinen, A.H.2    Aphalo, P.J.3    Smolander, H.4
  • 59
    • 0001445385 scopus 로고
    • Estimating forest growth and efficiency in relation to canopy leaf area
    • Waring, R.H. 1983. Estimating forest growth and efficiency in relation to canopy leaf area. Adv. Ecol. Res. 13:327-354.
    • (1983) Adv. Ecol. Res. , vol.13 , pp. 327-354
    • Waring, R.H.1
  • 61
    • 0027966383 scopus 로고
    • Seasonal partitioning of evaporation between trees and understory in a widely spaced Pinus radiata stand
    • Whitehead, D., F.M. Kelliher, P.M. Lane and D.S. Pollock. 1994. Seasonal partitioning of evaporation between trees and understory in a widely spaced Pinus radiata stand. J. Appl. Ecol. 31:528-542.
    • (1994) J. Appl. Ecol. , vol.31 , pp. 528-542
    • Whitehead, D.1    Kelliher, F.M.2    Lane, P.M.3    Pollock, D.S.4
  • 62
    • 0028076377 scopus 로고
    • Hydraulic architecture of Acer saccharum and A. rubrum: Comparison of branches to whole trees and the contribution of leaves to hydraulic resistance
    • Yang, S. and M.T. Tyree. 1994. Hydraulic architecture of Acer saccharum and A. rubrum: comparison of branches to whole trees and the contribution of leaves to hydraulic resistance. J. Exp. Bot. 45:179-186.
    • (1994) J. Exp. Bot. , vol.45 , pp. 179-186
    • Yang, S.1    Tyree, M.T.2
  • 63
    • 0002336559 scopus 로고
    • Estimation of the total amount of respiration in woody organs in trees and forest communities
    • Yoda, K., K. Shinozaki, H. Ogawa, K. Hozumi and T. Kira. 1965. Estimation of the total amount of respiration in woody organs in trees and forest communities. J. Biol. Osaka City Univ. 16:15-26.
    • (1965) J. Biol. Osaka City Univ. , vol.16 , pp. 15-26
    • Yoda, K.1    Shinozaki, K.2    Ogawa, H.3    Hozumi, K.4    Kira, T.5


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