Allocation to leaf area and sapwood area affects water relations of co-occurring savanna and forest trees

Abstract

Water availability is a principal factor limiting the distribution of closed-canopy forest in the seasonal tropics, suggesting that forest tree species may not be well adapted to cope with seasonal drought. We studied 11 congeneric species pairs, each containing one forest and one savanna species, to test the hypothesis that forest trees have a lower capacity to maintain seasonal homeostasis in water relations relative to savanna species. To quantify this, we measured sap flow, leaf water potential (ΨL), stomatal conductance (g s), wood density, and Huber value (sapwood area:leaf area) of the 22 study species. We found significant differences in the water relations of these two species types. Leaf area specific hydraulic conductance of the soil/root/leaf pathway (G t) was greater for savanna species than forest species. The lower G t of forest trees resulted in significantly lower ΨL and g s in the late dry season relative to savanna trees. The differences in G t can be explained by differences in biomass allocation of savanna and forest trees. Savanna species had higher Huber values relative to forest species, conferring greater transport capacity on a leaf area basis. Forest trees have a lower capacity to maintain homeostasis in ΨL due to greater allocation to leaf area relative to savanna species. Despite significant differences in water relations, relationships between traits such as wood density and minimum ΨL were indistinguishable for the two species groups, indicating that forest and savanna share a common axis of water-use strategies involving multiple traits.

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Change history

  • 05 January 2019

    The original version of this article unfortunately contained a mistake. The Electronic supplementary material (ESM)?was accompanying this article by mistake.

  • 05 January 2019

    The original version of this article unfortunately contained a mistake. The Electronic supplementary material (ESM)��was accompanying this article by mistake.

  • 05 January 2019

    The original version of this article unfortunately contained a mistake. The Electronic supplementary material (ESM)��was accompanying this article by mistake.

  • 05 January 2019

    The original version of this article unfortunately contained a mistake. The Electronic supplementary material (ESM)��was accompanying this article by mistake.

  • 05 January 2019

    The original version of this article unfortunately contained a mistake. The Electronic supplementary material (ESM)��was accompanying this article by mistake.

References

  1. Ackerly D (2004) Functional strategies of chaparral shrubs in relation to seasonal water deficit and disturbance. Ecol Monogr 74:25–44

    Article  Google Scholar 

  2. Adejuwon JO, Adesina FA (1992) The nature and dynamics of the forest-savanna boundary in south-western Nigeria. In: Furley PA, Procter J, Ratter JA (eds) Nature and dynamics of the forest-savanna boundaries. Chapman and Hall, London, pp 331–352

    Google Scholar 

  3. Bhaskar R, Valiente-Banuet A, Ackerly DD (2007) Evolution of hydraulic traits in closely related species pairs from Mediterranean and non-Mediterranean environments of North America. New Phytol 176:718–726

    Article  PubMed  Google Scholar 

  4. Bond WJ (2008) What limits trees in C-4 grasslands and savannas? Annu Rev Ecol Evol Syst 39:641–659

    Article  Google Scholar 

  5. Bowman DMJS (2000) Australian rainforests: islands of green in a land of fire. Cambridge University Press, Cambridge

    Google Scholar 

  6. Bucci SJ, Goldstein G, Meinzer FC, Scholz FG, Franco AC, Bustamante M (2004) Functional convergence in hydraulic architecture and water relations of tropical savanna trees: from leaf to whole plant. Tree Physiol 24:891–899

    CAS  PubMed  Google Scholar 

  7. Bucci SJ, Goldstein G, Meinzer FC, Franco AC, Campanello P, Scholz FG (2005) Mechanisms contributing to seasonal homeostasis of minimum leaf water potential and predawn disequilibrium between soil and plant water potential in Neotropical savanna trees. Trees Struct Funct 19:296–304

    Google Scholar 

  8. Castro EA, Kauffman JB (1998) Ecosystem structure in the Brazilian cerrado: a vegetation gradient of aboveground biomass, root mass and consumption by fire. J Trop Ecol 14:263–283

    Article  Google Scholar 

  9. Castro-Diez P, Villar-Salvador P, Perez-Rontome C, Maestro-Martinez M, Montserrat-Marti G (1998) Leaf morphology, leaf chemical composition and stem xylem characteristics in two Pistacia (Anacardiaceae) species along a climatic gradient. Flora 193:195–202

    Google Scholar 

  10. da Silva MC Jr, Furley PA, Ratter JA (1996) Variations in tree communities and soils with slope in gallery forest, Federal District, Brazil. In: Anderson MG, Brooks SM (eds) Advances in hillslope processes, vol 1. Wiley, Chichester, pp 451–469

    Google Scholar 

  11. Davis SD, Ewers FW, Sperry JS, Portwood KA, Crocker MC, Adams GC (2002) Shoot dieback during prolonged drought in Ceanothus (Rhamnaceae) chaparral of California: a possible case of hydraulic failure. Am J Bot 89:820–828

    Article  Google Scholar 

  12. Durigan G, Ratter JA (2006) Successional changes in cerrado and cerrado/forest ecotonal vegetation in western Sao Paulo State, Brazil, 1962–2000. Edinb J Bot 63:119–130

    Article  Google Scholar 

  13. Enquist BJ, West GB, Charnov EL, Brown JH (1999) Allometric scaling of production and life-history variation in vascular plants. Nature 401:907–911

    Article  CAS  Google Scholar 

  14. Felfili JM, da Silva MC Jr (1992) Floristic composition, phytosociology and comparison of cerrado and gallery forests at Fazenda Agua Limpa, Federal District, Brazil. In: Furley PA, Proctor J, Ratter JA (eds) Nature and dynamics of the forest-savanna boundaries. Chapman and Hall, London, pp 393–416

    Google Scholar 

  15. Gartner BL, Meinzer FC (2005) Structure-function relationships in sapwood water transport and storage. In: Zwieniecki M, Holbrook NM (eds) Vascular transport in plants. Elsevier/Academic Press, Oxford, pp 307–331

    Google Scholar 

  16. Granier A (1985) A new method of sap flow measurement in tree stems. Ann Sci For 42:193–200

    Article  Google Scholar 

  17. Granier A (1987) Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiol 3:309–319

    PubMed  Google Scholar 

  18. Hao GY, Hoffmann WA, Scholtz FG, Bucci SJ, Meinzer FC, Franco AC, Cao KF, Goldstein G (2008) Stem and leaf hydraulics of congeneric tree species from adjacent tropical savanna and forest ecosystems. Oecologia 155:405–415

    Article  PubMed  Google Scholar 

  19. Hennenberg KJ, Goetze D, Kouame L, Orthmann B, Porembski S (2005) Border and ecotone detection by vegetation composition along forest-savanna transects in Ivory Coast. J Veg Sci 16:301–310

    Article  Google Scholar 

  20. Hoffmann WA, Franco AC (2003) Comparative growth analysis of tropical forest and savanna woody plants using phylogenetically independent contrasts. J Ecol 91:475–484

    Article  Google Scholar 

  21. Hoffmann WA, Orthen B, Nascimento PKV (2003) Comparative fire ecology of tropical savanna and forest trees. Funct Ecol 17:720–726

    Article  Google Scholar 

  22. Hoffmann WA, Orthen B, Franco AC (2004) Constraints to seedling success of savanna and forest trees across the savanna-forest boundary. Oecologia 140:252–260

    Article  PubMed  Google Scholar 

  23. Hoffmann WA, Franco AC, Moreira MZ, Haridasan M (2005) Specific leaf area explains differences in leaf traits between congeneric savanna and forest trees. Funct Ecol 19:932–940

    Article  Google Scholar 

  24. Hoffmann WA, Adasme R, Haridasan M, Carvalho M, Geiger EL, Pereir MAB, Gotsch SG, Franco AC (2009) Tree topkill, not mortality, governs the dynamics of alternate stable states at savanna-forest boundaries under frequent fire in central Brazil. Ecology 90(5):1326–1337

    Article  PubMed  Google Scholar 

  25. Kelley G, O’Grady AP, Hutley LB, Eamus D (2007) 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

    Article  Google Scholar 

  26. Lundblad M, Lagergren F, Lindroth A (2001) Evaluation of heat balance and heat dissipation methods for sap flow measurements in pine and spruce. Ann For Sci 58:625–638

    Article  Google Scholar 

  27. Meinzer FC (2003) Functional convergence in plant responses to the environment. Oecologia 134:1–11

    Article  PubMed  Google Scholar 

  28. Meinzer FC, Goldstein G, Franco AC, Bustamante M, Igler E, Jackson P, Caldas L, Rundel PW (1999) Atmospheric and hydraulic limitations on transpiration in Brazilian cerrado woody species. Funct Ecol 13:273–282

    Article  Google Scholar 

  29. Meinzer FC, Johnson DM1, Lachenbruch B, McCulloh KA, Woodruff DR (2009) Xylem hydraulic safety margins in woody plants: coordination of stomatal control of xylem tension with hydraulic capacitance. Funct Ecol 23:922–930

  30. Myster RW, Walker LR (1997) Plant successional pathways on Puerto Rican landslides. J Trop Ecol 13:165–173

    Article  Google Scholar 

  31. Nepstad DC, Decarvalho CR, Davidson EA, Jipp PH, Lefebvre PA, Negreiros GH, Dasilva ED, Stone TA, Trumbore SE, Vieira S (1994) The role of deep roots in the hydrological and carbon cycles of Amazonian forests and pastures. Nature 372:666–669

    Article  CAS  Google Scholar 

  32. O’Grady AP, Cook PG, Eamus ED, Duguid A, Wischusen JDH, Fass T, Worldege D (2009) Convergence of tree water use within an arid-zone woodland. Oecologia 160:643–655

    Article  PubMed  Google Scholar 

  33. Oliveira RS, Bezerra L, Davidson EA, Pinto F, Klink CA, Nepstad DC, Moreira A (2005) Deep root function in soil water dynamics in cerrado savannas of central Brazil. Funct Ecol 19:574–581

    Article  Google Scholar 

  34. Oliveira-Filho AT, Ratter JA (1995) A study of the origin of central Brazilian forests by the analysis of plant species distribution patterns. Edinb J Bot 52:141–194

    Article  Google Scholar 

  35. Rossatto DR, Hoffmann WA, Franco AC (2009) Differences in growth patterns between co-occurring forest and savanna trees affect the forest–savanna boundary. Funct Ecol 23:689–698

    Google Scholar 

  36. San José JJ, Fariñas MR (1991) Temporal changes in the structure of a Trachypogon savanna protected for 25 years. Acta Oecol 12:237–247

    Google Scholar 

  37. Soltis P, Soltis D, Edwards C (2005) Angiosperms. Flowering plants. Version 3 June 2005. http://tolweb.org/Angiosperms/20646/2005.06.03 In: the Tree of Life web project, http://tolweb.org/

  38. Stratton L, Goldstein G, Meinzer FC (2000) Stem water storage capacity and efficiency of water transport: their functional significance in a Hawaiian dry forest. Plant Cell Environ 23:99–106

    Article  Google Scholar 

  39. Tang G, Bartlein P (2008) Simulating the climatic effects on vegetation: approaches, issues and challenges. Prog Phys Geogr 5:543–556

    Article  Google Scholar 

  40. Tyree MT, Snyderman DA, Wilmot TR, Machado JL (1991) Water relations and hydraulic architecture of a tropical tree (Schefflera-Morototoni)—data, models, and a comparison with 2 temperate species (Acer-Saccharum and Thuja-Occidentalis). Plant Physiol 96:1105–1113

    Article  PubMed  CAS  Google Scholar 

  41. Westoby M, Falster DS, Moles AT, Vesk PA, Wright IJ (2002) Plant ecological strategies: some leading dimensions of variation between species. Annu Rev Ecol Syst 33:125–159

    Article  Google Scholar 

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Acknowledgments

We thank IBGE for logistical support; Bruna Diniz, Marina Carvalho, Mirea A. B. Pereira, Inaldo Araujo, Kristen Mckinley and Palmyra Romeo for assistance in the field; and Renee Marchin, On Lee Lau, Alice Wines and Wade Wall and three anonymous reviewers for comments on this manuscript. This material is based on work supported by the National Science Foundation under grant no. DEB-0542912, the A. W. Mellon Foundation, and CNPq, Brazil.

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Correspondence to Sybil G. Gotsch.

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Communicated by Ram Oren.

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Gotsch, S.G., Geiger, E.L., Franco, A.C. et al. Allocation to leaf area and sapwood area affects water relations of co-occurring savanna and forest trees. Oecologia 163, 291–301 (2010). https://doi.org/10.1007/s00442-009-1543-2

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Keywords

  • Leaf area index
  • Huber value
  • Sap flow
  • Brazil
  • Cerrado