A model inter-comparison study to examine limiting factors in modelling Australian tropical savannas

Biogeosciences

Volumn 13, Issue 11, 2016, Pages 3245-3265

  Whitley, Rhys ^a   Beringer, Jason ^b   Hutley, Lindsay B ^c   Abramowitz, Gab ^d   De Kauwe, Martin G ^a   Duursma, Remko ^e   Evans, Bradley ^f   Haverd, Vanessa ^g   Li, Longhui ^h   Ryu, Youngryel ⁱ   Smith, Benjamin ^j   Wang, Ying Ping ^g   Williams, Mathew ^k   Yu, Qiang ^g  

^a MACQUARIE UNIVERSITY   (Australia)

^b UNIVERSITY OF WESTERN AUSTRALIA   (Australia)

^c CHARLES DARWIN UNIVERSITY   (Australia)

^d UNIVERSITY OF NEW SOUTH WALES   (Australia)

^e WESTERN SYDNEY UNIVERSITY   (Australia)

^f UNIVERSITY OF SYDNEY   (Australia)

^g CSIRO   (Australia)

^h UNIVERSITY OF TECHNOLOGY SYDNEY   (Australia)

ⁱ Seoul National University   (South Korea)

^j LUND UNIVERSITY   (Sweden)

^k UNIVERSITY OF EDINBURGH   (United Kingdom)

more..

Author keywords

[No Author keywords available]

Indexed keywords

BENCHMARKING; BIOME; CALIBRATION; CLIMATE CHANGE; CLIMATE MODELING; COMPARATIVE STUDY; ECOLOGICAL MODELING; GLOBAL CLIMATE; LIMITING FACTOR; NET PRIMARY PRODUCTION; PERFORMANCE ASSESSMENT; PHENOLOGY; PHOTOSYNTHESIS; SAVANNA; VEGETATION TYPE; WATER UPTAKE;

AUSTRALIA;

POACEAE;

EID: 84973502254     PISSN: 17264170     EISSN: 17264189     Source Type: Journal    
DOI: 10.5194/bg-13-3245-2016     Document Type: Article

References (79)

1. Abramowitz, G.: Towards a public, standardized, diagnostic benchmarking system for land surface models, Geosci. Model Dev., 5, 819-827, doi:10.5194/gmd-5-819-2012, 2012.
2. Abramowitz, G., Leuning, R., Clark, M., and Pitman, A.: Evaluating the Performance of Land Surface Models, J. Climate, 21, 5468-5481, doi:10.1175/2008JCLI2378.1, 2008.
3. Ball, J. T., Woodrow, I. E., and Berry, J. A.: A model predicting stomatal conductance and its contribution to the control of photosynthesis under different environmental conditions, in: Progress in Photosynthesis Research, Martinus-Nijhoff Publishers, Dordrecht, the Netherlands, 221-224, 1987.
4. Bashtannyk, D. M. and Hyndman, R. J.: Bandwidth selection for kernel conditional density estimation, Comput. Stat. Data An., 36, 279-298, doi:10.1016/S0167-9473(00)00046-3, 2001.
5. Beringer, J., Hutley, L. B., Tapper, N. J., and Cernusak, L. A.: Savanna fires and their impact on net ecosystem productivity in North Australia, Glob. Change Biol., 13, 990-1004, doi:10.1111/j.1365-2486.2007.01334.x, 2007.
6. Beringer, J., Hutley, L. B., Hacker, J. M., Neininger, B., and Paw, U. K. T.: Patterns and processes of carbon, water and energy cycles across northern Australian landscapes: From point to region, Agr. Forest Meteorol., 151, 1409-1416, doi:10.1016/j.agrformet.2011.05.003, 2011.
7. Beringer, J., Hutley, L. B., Abramson, D., Arndt, S. K., Briggs, P., Bristow, M., Canadell, J. G., Cernusak, L. A., Eamus, D., Evans, B. J., Fest, B., Goergen, K., Grover, S. P., Hacker, J., Haverd, V., Kanniah, K., Livesley, S. J., Lynch, A., Maier, S., Moore, C., Raupach, M., Russell-Smith, J., Scheiter, S., Tapper, N. J., and Uotila, P.: Fire in Australian Savannas: from leaf to landscape, Glob. Change Biol., 21, 62-81, doi:10.1111/gcb.12686, 2015.
8. Best, M. J., Abramowitz, G., Johnson, H. R., Pitman, A. J., Balsamo, G., Boone, A., Cuntz, M., Decharme, B., Dirmeyer, P. A., Dong, J., Ek, M., Guo, Z., Haverd, V., van den Hurk, B. J., Nearing, G. S., Pak, B., Peters-Lidard, C., Santanello Jr, J. A., Stevens, L., and Vuichard, N.: The plumbing of land surface models: benchmarking model performance, J. Hydrometeorol., 16, 1425-1442, 2015.
9. Bond, W. J.: What Limits Trees in C4 Grasslands and Savannas?, Annu. Rev. Ecol. Evol. Syst., 39, 641-659, doi:10.1146/annurev.ecolsys.39.110707.173411, 2008.
10. Bowman, D. M. J. S. and Prior, L. D.: Why do evergreen trees dominate the Australian seasonal tropics?, Aust. J. Bot., 53, 379-399, doi:10.1071/BT05022, 2005.
11. Cernusak, L. A., Hutley, L. B., Beringer, J., Holtum, J. A. M., and Turner, B. L.: Photosynthetic physiology of eucalypts along a sub-continental rainfall gradient in northern Australia, Agr. Forest. Meteorol., 151, 1462-1470, doi:10.1016/j.agrformet.2011.01.006, 2011.
12. Chapin, F. S., Woodwell, G. M., Randerson, J. T., Rastetter, E. B., Lovett, G. M., Baldocchi, D. D., Clark, D. A., Harmon, M. E., Schimel, D. S., Valentini, R., Wirth, C., Aber, J. D., Cole, J. J., Goulden, M. L., Harden, J. W., Heimann, M., Howarth, R. W., Matson, P. A., McGuire, A. D., Melillo, J. M., Mooney, H. A., Neff, J. C., Houghton, R. A., Pace, M. L., Ryan, M. G., Running, S.W., Sala, O. E., Schlesinger,W. H., and Schulze, E. D.: Reconciling carbon-cycle concepts, terminology, and methods, Ecosystems, 9, 1041-1050, doi:10.1007/s10021-005-0105-7, 2006.
13. Chen, X., Hutley, L. B., and Eamus, D.: Carbon balance of a tropical savanna of northern Australia, Oecologia, 137, 405-16, doi:10.1007/s00442-003-1358-5, 2003.
14. Collatz, G. J., Ball, J. T., Grivet, C., and Berry, J. A.: Physiological and environmental regulation of stomatal conductance, photosynthesis and transpiration: a model that includes a laminar boundary layer, Agr. Forest. Meteorol., 54, 107-136, 1991.
15. Collatz, G. J., Ribas-Carbo, M., and Berry, J. A.: Coupled photosynthesis-stomatal conductance model for leaves of C4 plants, Funct. Plant Biol., 19, 519-538, 1992.
16. De Kauwe, M. G., Zhou, S.-X., Medlyn, B. E., Pitman, A. J.,Wang, Y.-P., Duursma, R. A., and Prentice, I. C.: Do land surface models need to include differential plant species responses to drought? Examining model predictions across a mesic-xeric gradient in Europe, Biogeosciences, 12, 7503-7518, doi:10.5194/bg-12- 7503-2015, 2015.
17. Donohue, R. J., Mc Vicar, T. R., and Roderick, M. L.: Climaterelated trends in Australian vegetation cover as inferred from satellite observations, 1981-2006, Glob. Change Biol., 15, 1025-1039, doi:10.1111/j.1365-2486.2008.01746.x, 2009.
18. Duursma, R. A. and Medlyn, B. E.: MAESPA: a model to study interactions between water limitation, environmental drivers and vegetation function at tree and stand levels, with an example application to [CO2]-drought interactions, Geosci. Model Dev., 5, 919-940, doi:10.5194/gmd-5-919-2012, 2012.
19. Eamus, D., O'Grady, A. P. O., and Hutley, L. B.: Dry season conditions determine wet season water use in the wet-tropical savannas of northern Australia, Tree Physiol., 20, 1219-1226, 2000.
20. Eamus, D., Hutley, L. B., and O'Grady, A. P. O.: Daily and seasonal patterns of carbon and water fluxes above a north Australian savanna, Tree Physiol., 21, 977-88, 2001.
21. Eamus, D., Chen, X., Kelley, G., and Hutley, L. B.: Root biomass and root fractal analyses of an open Eucalyptus forest in a savanna of north Australia, Aust. J. Bot., 50, 31-41, 2002.
22. Eamus, D., Cleverly, J., Boulain, N., Grant, N., Faux, R., and Villalobos-Vega, R.: Carbon and water fluxes in an arid-zone Acacia savanna woodland: An analyses of seasonal patterns and responses to rainfall events, Agr. Forest. Meteorol., 182-183, 225-238, doi:10.1016/j.agrformet.2013.04.020, 2013.
23. Farquhar, G. D., von Caemmerer, S., and Berry, J. A.: A Biochemical Model of Photosynthetic CO2 Assimilation in Leaves of C3 species, Planta, 149, 78-90, 1980.
24. Grace, J., Jose, J. S., Meir, P., Miranda, H. S., and Montes, R. A.: Productivity and carbon fluxes of tropical savannas, J. Biogeogr., 33, 387-400, doi:10.1111/j.1365-2699.2005.01448.x, 2006.
25. Haverd, V., Raupach, M. R., Briggs, P. R., Canadell, J. G., Isaac, P., Pickett-Heaps, C., Roxburgh, S. H., van Gorsel, E., Viscarra Rossel, R. A., and Wang, Z.: Multiple observation types reduce uncertainty in Australia's terrestrial carbon and water cycles, Biogeosciences, 10, 2011-2040, doi:10.5194/bg-10-2011-2013, 2013.
26. Haverd, V., Smith, B., Raupach, M., Briggs, P., Nieradzik, L., Beringer, J., Hutley, L., Trudinger, C. M., and Cleverly, J.: Coupling carbon allocation with leaf and root phenology predicts tree-grass partitioning along a savanna rainfall gradient, Biogeosciences, 13, 761-779, doi:10.5194/bg-13-761-2016, 2016.
27. Haxeltine, A. and Prentice, I. C.: A general model for the lightuse efficiency of primary production, Funct. Ecol., 10, 551-561, doi:10.2307/2390165, 1996.
28. Higgins, S. I. and Scheiter, S.: Atmospheric CO2 forces abrupt vegetation shifts locally, but not globally, Nature, 488, 209-212, doi:10.1038/nature11238, 2012.
29. Hsu, K.: Self-organizing linear output map (SOLO): An artificial neural network suitable for hydrologic modeling and analysis, Water Resour. Res., 38, 1-17, doi:10.1029/2001WR000795, 2002.
30. Huntingford, C. and Monteith, J. L.: The behaviour of a mixedlayer model of the convective boundary layer coupled to a big leaf model of surface energy partitioning, Bound.-Lay. Meteorol., 88, 87-101, doi:10.1023/A:1001110819090, 1998.
31. Hutchinson, M. F. and Xu, T.: ANUCLIM v6.1, Fenner School of Environment and Society, Australian National University, Canberra, ACT, 2010.
32. Hutley, L. B., O'Grady, A. P. O., and Eamus, D.: Evapotranspiration from Eucalypt open-forest savanna of Northern Australia, Funct. Ecol., 14, 183-194, 2000.
33. Hutley, L. B., Grady, A. P. O., and Eamus, D.: Monsoonal influences on evapotranspiration of savanna vegetation of northern Australia, Oecologia, 126, 434-443, doi:10.1007/s004420000539, 2001.
34. Hutley, L. B., Beringer, J., Isaac, P. R., Hacker, J. M., and Cernusak, L. A.: A sub-continental scale living laboratory: Spatial patterns of savanna vegetation over a rainfall gradient in northern Australia, Agr. Forest. Meteorol., 151, 1417-1428, doi:10.1016/j.agrformet.2011.03.002, 2011.
35. Isaac, P. and van Gorsel, E.: OzFlux: Australian and New Zealand Flux Research and Monitoring, available at: http://data.ozflux.org.au, last access: 1 June 2016.
36. Isbell, R.: The Australian Soil Classification, Revised Edn., CSIRO Publishing, Collingwood, Victoria, 2002.
37. Isbell, R. F.: Digital Atlas of Australian Soils, available at: http: //www.asris.csiro.au/downloads/Atlas/soilAtlas2M.zip, last access: 1 June 2016.
38. Kanniah, K. D., Beringer, J., and Hutley, L. B.: The comparative role of key environmental factors in determining savanna productivity and carbon fluxes: A review, with special reference to northern Australia, Prog. Phys. Geogr., 34, 459-490, doi:10.1177/0309133310364933, 2010.
39. Kelley, G., O'Grady, A. P., Hutley, L. B., and Eamus, D.: A comparison of tree water use in two contiguous vegetation communities of the seasonally dry tropics of northern Australia: The importance of site water budget to tree hydraulics, Aust. J. Bot., 55, 700-708, doi:10.1071/BT07021, 2007.
40. Koch, G. W., Vitousek, P. M., Steffen, W. L., and Walker, B. H.: Terrestrial transects for global change research, Vegetation, 121, 53-65, doi:10.1007/BF00044672, 1995.
41. Kowalczyk, E. A., Wang, Y. P., and Law, R. M.: The CSIRO Atmosphere Biosphere Land Exchange (CABLE) model for use in climate models and as an offline model, Aspendale, Victoria, 2006.
42. Lehmann, C. E. R., Prior, L. D., and Bowman, D. M. J. S.: Decadal dynamics of tree cover in an Australian tropical savanna, Austral Ecology, 34, 601-612, doi:10.1111/j.1442-9993.2009.01964.x, 2009.
43. Lehmann, C. E. R., Anderson, T. M., Sankaran, M., Higgins, S. I., Archibald, S., Hoffmann, W. A., Hanan, N. P., Williams, R. J., Fensham, R. J., Felfili, J., Hutley, L. B., Ratnam, J., San Jose, J., Montes, R., Franklin, D., Russell-Smith, J., Ryan, C. M., Durigan, G., Hiernaux, P., Haidar, R., Bowman, D. M. J. S., and Bond, W. J.: Savanna vegetation-fire-climate relationships differ among continents, Science, 343, 548-552, doi:10.1126/science.1247355, 2014.
44. Leuning, R.: A critical appraisal of a combined stomatalphotosynthesis model for C3 plants, Plant Cell Environ., 18, 339-355, 1995.
45. Li, L., Wang, Y. P., Yu, Q., Pak, B., Eamus, D., Yan, J., Van Gorsel, E., and Baker, I. T.: Improving the responses of the Australian community land surface model (CABLE) to seasonal drought, J. Geophys. Res.-Biogeo., 117, 1-16, doi:10.1029/2012JG002038, 2012.
46. Ma, X., Huete, A., Yu, Q., Coupe, N. R., Davies, K., Broich, M., Ratana, P., Beringer, J., Hutley, L. B., Cleverly, J., Boulain, N., and Eamus, D.: Spatial patterns and temporal dynamics in savanna vegetation phenology across the North Australian Tropical Transect, Remote Sens. Environ., 139, 97-115, doi:10.1016/j.rse.2013.07.030, 2013.
47. McKenzie, N. N., Jacquier, D., Isbell, R., and Brown, K.: Australian soils and landscapes?: an illustrated compendium, CSIRO Publishing, Collingwood, Victoria, 2004.
48. Medlyn, B. E., Robinson, A. P., Clement, R., and McMurtrie, R. E.: On the validation of models of forest CO2 exchange using eddy covariance data: some perils and pitfalls, Tree Physiol., 25, 839-857, 2005.
49. Medlyn, B. E., Duursma, R. A., Eamus, D., Ellsworth, D. S., Prentice, I. C., Barton, C. V. M., Crous, K. Y., De Angelis, P., Freeman, M., and Wingate, L.: Reconciling the optimal and empirical approaches to modelling stomatal conductance, Glob. Change Biol., 17, 2134-2144, doi:10.1111/j.1365-2486.2010.02375.x, 2011.
50. Moore, C. E., Beringer, J., Evans, B., Hutley, L. B., McHugh, I., and Tapper, N. J.: The contribution of trees and grasses to productivity of an Australian tropical savanna, Biogeosciences, 13, 2387-2403, doi:10.5194/bg-13-2387-2016, 2016.
51. O'Grady, A. P. O., Eamus, D., and Hutley, L. B.: Transpiration increases during the dry season: patterns of tree water use in eucalypt open-forests of northern Australia, Tree Physiol., 19, 591-597, 1999.
52. Parton, W. J., Anderson, D. W., Cole, C. V., and Stewart, J. W. B.: Simulation of soil organic matter formation and mineralization in semiarid agroecosystems, in: Nutrient Cycling In Agricultural Ecosystems, 23, 533-550, 1983.
53. Pitman, A. J.: The evolution of and revolution in, land surface schemes designed for climate models, Int. J. Climatol., 23, 479-510, doi:10.1002/joc.893, 2003.
54. Prior, L. D., Eamus, D., and Duff, G. A.: Seasonal Trends in Carbon Assimilation, Stomatal Conductance, Pre-dawn Leaf Water Potential and Growth in Terminalia ferdinandiana, a Deciduous Tree of Northern Australian Savannas, Aust. J. Bot., 45, 53-69, 1997.
55. Richardson, A. D., Keenan, T. F., Migliavacca, M., Ryu, Y., Sonnentag, O., and Toomey, M.: Climate change, phenology, and phenological control of vegetation feedbacks to the climate system, Agr. Forest. Meteorol., 169, 156-173, doi:10.1016/j.agrformet.2012.09.012, 2013.
56. Russell-Smith, J. and Edwards, A. C.: Seasonality and fire severity in savanna landscapes of monsoonal northern Australia, Int. J. Wildland Fire, 15, 541-550, doi:10.1071/WF05111, 2006.
57. Ryu, Y., Baldocchi, D. D., Kobayashi, H., van Ingen, C., Li, J., Black, T. A., Beringer, J., van Gorsel, E., Knohl, A., Law, B. E., and Roupsard, O.: Integration of MODIS land and atmosphere products with a coupled-process model to estimate gross primary productivity and evapotranspiration from 1 km to global scales, Global Biogeochem. Cy., 25, GB4017, doi:10.1029/2011GB004053, 2011.
58. Ryu, Y., Baldocchi, D. D., Black, T. A., Detto, M., Law, B. E., Leuning, R., Miyata, A., Reichstein, M., Vargas, R., Ammann, C., Beringer, J., Flanagan, L. B., Gu, L., Hutley, L. B., Kim, J., McCaughey, H., Moors, E. J., Rambal, S., and Vesala, T.: On the temporal upscaling of evapotranspiration from instantaneous remote sensing measurements to 8- day mean daily-sums, Agr. Forest. Meteorol., 152, 212-222, doi:10.1016/j.agrformet.2011.09.010, 2012.
59. Sankaran, M., Hanan, N. P., Scholes, R. J., Ratnam, J., Augustine, D. J., Cade, B. S., Gignoux, J., Higgins, S. I., Le Roux, X., Ludwig, F., Ardo, J., Banyikwa, F., Bronn, A., Bucini, G., Caylor, K. K., Coughenour, M. B., Diouf, A., Ekaya,W., Feral, C. J., February, E. C., Frost, P. G. H., Hiernaux, P., Hrabar, H., Metzger, K. L., Prins, H. H. T., Ringrose, S., Sea, W., Tews, J., Worden, J., and Zambatis, N.: Determinants of woody cover in African savannas, Nature, 438, 846-849, doi:10.1038/nature04070, 2005.
60. Scheiter, S. and Higgins, S. I.: Partitioning of root and shoot competition and the stability of savannas, Am. Nat., 170, 587-601, doi:10.1086/521317, 2007.
61. Scheiter, S. and Higgins, S. I.: Impacts of climate change on the vegetation of Africa: an adaptive dynamic vegetation modelling approach, Glob. Change Biol., 15, 2224-2246, doi:10.1111/j.1365- 2486.2008.01838.x, 2009.
62. Scheiter, S., Higgins, S. I., Beringer, J., and Hutley, L. B.: Climate change and long-term fire management impacts on Australian savannas, New Phytol., 205, 1211-1226, doi:10.1111/nph.13130, 2015.
63. Scholes, R. J. and Archer, S. R.: Tree-grass interactions in savannas, Annu. Rev. Ecol. Syst., 28, 517-544, doi:10.1146/annurev.ecolsys.28.1.517, 1997.
64. Schymanski, S. J., Roderick, M. L., Sivapalan, M., Hutley, L. B., and Beringer, J.: A test of the optimality approach to modelling canopy properties and CO2 uptake by natural vegetation, Plant. Cell Environ., 30, 1586-98, doi:10.1111/j.1365- 3040.2007.01728.x, 2007.
65. Schymanski, S. J., Sivapalan, M., Roderick, M. L., Beringer, J., and Hutley, L. B.: An optimality-based model of the coupled soil moisture and root dynamics, Hydrol. Earth Syst. Sci., 12, 913-932, doi:10.5194/hess-12-913-2008, 2008.
66. Schymanski, S. J., Sivapalan, M., Roderick, M. L., Hutley, L. B., and Beringer, J.: An optimality-based model of the dynamic feedbacks between natural vegetation and the water balance, Water Resour. Res., 45, W01412, doi:10.1029/2008WR006841, 2009.
67. Sea, W. B., Choler, P., Beringer, J., Weinmann, R. A., Hutley, L. B., and Leuning, R.: Documenting improvement in leaf area index estimates from MODIS using hemispherical photos for Australian savannas, Agr. Forest. Meteorol., 151, 1453-1461, doi:10.1016/j.agrformet.2010.12.006, 2011.
68. Simioni, G., Roux, X. Le, Gignoux, J., and Sinoquet, H.: Treegrass: a 3-D, process-based model for simulating plant interactions in tree-grass ecosystems, Ecol. Modell., 131, 47-63, 2000.
69. Simioni, G., Gignoux, J., and Le Roux, X.: Tree layer spatial structure can affect savanna production and water budget: Results of a 3-D model, Ecology, 84, 1879-1894, doi:10.1890/0012- 9658(2003)084[1879:TLSSCA]2.0.CO;2, 2003.
70. Sitch, S., Smith, B., Prentice, I. C., Arneth, A., Bondeau, A., Cramer, W., Kaplan, J., Levis, S., Lucht, W., Sykes, M., Thonicke, K., and Venevski, S.: Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic vegetation model, Glob. Change Biol., 9, 161-185, 2003.
71. Smith, B., Prentice, I. C., and Sykes, M. T.: Representation of vegetation dynamics in the modelling of terrestrial ecosystems: Comparing two contrasting approaches within European climate space, Global Ecol. Biogeogr., 10, 621-637, doi:10.1046/j.1466- 822X.2001.t01-1-00256.x, 2001.
72. Still, C. J., Berry, J. A., Collatz, G. J., and DeFries, R. S.: Global distribution of C3 and C4 vegetation: Carbon cycle implications, Global Biogeochem. Cy., 17, 6-1-6-14, doi:10.1029/2001GB001807, 2003.
73. Tuzet, A., Perrier, A., and Leuning, R.: A coupled model of stomatal conductance, photosynthesis, Plant Cell Environ., 26, 1097-1117, 2003.
74. van der Werf, G. R., Randerson, J. T., Giglio, L., Gobron, N., and Dolman, A. J.: Climate controls on the variability of fires in the tropics and subtropics, Global Biogeochem. Cy., 22, 1-13, doi:10.1029/2007GB003122, 2008.
75. von Caemmerer, S. and Furbank, R. T.: Modeling C4 Photosynthesis, in: C4 Plant Biology, edited by: Sage, R. F. and Monson, R. K., 173-211, Academic Press, Toronto, 1999.
76. Wang, Y. P., Kowalczyk, E., Leuning, R., Abramowitz, G., Raupach, M. R., Pak, B., Van Gorsel, E., and Luhar, A.: Diag-nosing errors in a land surface model (CABLE) in the time and frequency domains, J. Geophys. Res.-Biogeo., 116, 1-18, doi:10.1029/2010JG001385, 2011.
77. Whitley, R. J., Macinnis-Ng, C. M. O., Hutley, L. B., Beringer, J., Zeppel, M., Williams, M., Taylor, D., and Eamus, D.: Is productivity of mesic savannas light limited or water limited? Results of a simulation study, Glob. Change Biol., 17, 3130-3149, doi:10.1111/j.1365-2486.2011.02425.x, 2011.
78. Williams, M., Rastetter, E. B., Fernandes, D. N., Goulden, M. L., Wofsy, S. C., Shaver, G. R., Melillo, J. M., Munger, J. W., Fan, S.-M., and Nadelhoffer, K. J.: Modelling the soil-plantatmosphere continuum in a Quercus Acer stand at Harvard Forest: the regulation of stomatal conductance by light, nitrogen and soil/plant hydraulic properties, Plant Cell Environ., 19, 911-927, 1996.
79. Williams, R. J., Duff, G. A., Bowman, D. M. J. S., and Cook, G. D.: Variation in the composition and structure of tropical savannas as a function of rainfall and soil texture along a large-scale climatic gradient in the Northern Territory, Australia, J. Biogeogr., 23, 747-756, doi:10.1111/j.1365-2699.1996.tb00036.x, 1996.