Publications

2015

Marchin, R. M., Salk, C. F., Hoffmann, W. A., & Dunn, R. R. (2015) Temperature alone does not explain phenological variation of diverse temperate plants under experimental warming. Global Change Biology, 21, 3138–51. Global Change Biology, 21: 3138–51.

Pellegrini, A.F.A., Franco, A.C., & Hoffmann, W.A. (2015)  Shifts in functional traits elevate risk of fire-driven tree dieback in tropical savanna-forest biomes. Global Change Biology, in press.

Carlson, A.S., Dole, J.M., Matthysse, A.G., Hoffmann, W.A., & Kornegay, J.L (2015) Bacteria species and solution pH effect postharvest quality of cut Zinnia elegans. Scientia Horticulturae, in press.

2014

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. & Bond, W.J. (2014). Savanna vegetation-fire-climate relationships differ among continents Science, 343: 548-52.

Parr, C.L., Lehmann, C.E.R., Bond, W.J., Hoffmann, W.A. & Andersen, A.N. (2014) Tropical grassy biomes: misunderstood, neglected, and under threat. Trends in Ecology and Evolution, 29: 205-213.

Schafer, J.L., Breslow, B.P., Hollingsworth, S.N., Hohmann, M.G. & Hoffmann, W.A. (2014) Size-dependent enhancement of water relations during post-fire resprouting. Tree Physiology, 34: 404-414.

Pellegrini, A.F.A., Hoffmann, W.A. & Franco, A.C. (2014). Carbon accumulation and nitrogen pool recovery during transitions from savanna to forest in central Brazil. Ecology, 95: 342-352.

Marchin, R.M., Dunn, R.R. & Hoffmann, W.A. (2014) Are winter-active species vulnerable to climate warming? A case study with the wintergreen terrestrial orchid, Tipularia discolor. Oecologia, 176:1161-1172.

Wall, W.A., Douglas, N.A., Hoffmann, W.A., Wentworth, T.R., Gray, J.B., Xiang, Q.-Y.J., Knaus, B.K. & Hohmann, M.G. (2014) Evidence of population bottleneck in Astragalus michauxii (Fabaceae), a narrow endemic of the southeastern United States. Conservation Genetics, 15:153-164.

2013

Silva, L.C.R., Hoffmann, W.A., Rossatto, D.R., Haridasan, M., Franco, A. C., & Horwath, W. R. (2013) CCan savannas become forests? A coupled analysis of nutrient stocks and fire thresholds in central Brazil. Plant and Soil, 373:829-842.

Rossatto, D.R., Hoffmann, W. A., Silva, L.C.R., Haridasan, M., Sternberg, L.S.L., & Franco, A. C. (2013)  Seasonal variation in leaf traits between congeneric savanna and forest trees in Central Brazil: implications for forest expansion into savanna. Trees, 27:1139-1150.

Schafer, J.L., Breslow, B.P., Just, M.G., Hohmann, M.G., Hollingsworth, S.N., Swatling-Holcomb, S.L., Hoffmann, W.A. (2013) Current and historical variation in wiregrass (Aristida stricta) abundance and distribution is not detectable from soil δ13C measurements in longleaf pine (Pinus palustris) savannas. Castanea, 78: 28-36.


2012

Grady, J.M. & Hoffmann, W.A. (2012) Caught in a fire trap: Recurring fire creates stable size equilibria in woody resprouters. Ecology, 93: 2052-2060.

Hoffmann, W.A., Jaconis, S.Y., McKinley, K., Geiger, E.L., Gotsch, S.G., & Franco, A.C. (2012) Fuels or microclimate? Understanding the drivers of fire feedbacks at savanna-forest boundaries. Austral Ecology, 37:634-643.

Wall, W.A., Hoffmann, Hoffmann, W.A., Wentworth, T.R., Gray, J.B. & Hohmann, M.G. (2012) Demographic effects of fire on two endemic plant species in the longleaf pine-wiregrass ecosystem. Plant Ecology, 213:1093-1104.

Hoffmann, W.A., Geiger, E.L., Gotsch, S., Rossatto, D.R., Silva, L.C.R., Lau, O.L., Haridasan, M., & Franco, A.C. (2012) Ecological thresholds at the savanna-forest boundary: How plant traits, resources and fire govern the distribution of tropical biomes. Ecology Letters, 15: 759-768.

2011

Wall, W.A., Wentworth, T.R, Shelingoski, S., Stucky, J.M., Leblond, R.J., and Hoffmann, W.A. (2011). Lost and Found: Remnants of the Big Savannah and their relationship to wet savannas in North Carolina. Castanea, 76: 348-363.

Ratnam, J., Bond, W.J., Fensham, R.J., Hoffmann, W.A., Archibald, S., Lehmann, C.E.R.,  Andersen, M.T., Higgins,S.I., Sankaran, M. (2011) When is a “forest” a savanna, and why does it matter? Global Ecology and Biogeography, 20:653-660.

Hoffmann, W.A., Marchin, R., Abit, P., and Lau, O.L. (2011) Hydraulic failure and tree dieback are associated with high wood density in a temperate forest under extreme drought. Global Change Biology, 8: 2731-2742.

Douglas, N.A., Wall, W.A., Xiang, Q.Y.,Hoffmann, WA, Wentworth, T.R., and Hohmann, M.G., 2011. Recent vicariance and the origin of the rare, edaphically specialized Sandhills Lily, Lilium pyrophilum (Liliaceae): evidence from phylogenetic and coalescent analyses. Molecular Ecology, 20:2901-2915.

Lehmann, C.E.R.. Archibald, S.,Hoffmann, W.A. and Bond, W.J. (2011) Deciphering the distribution of the savanna biome. New Phytologist, 19: 197-209.

Geiger, E.L., Gotsch, S.G., do Vale, G.D., Haridasan, M., Franco, A.C., & Hoffmann, W.A. (2011) Distinct roles of savanna and forest tree species in regeneration following fire suppression in a Brazilian savanna. Journal of Vegetation Science, 22:312-321.

Wall, W.A., Hilton, J.L., Wentworth, T.R., Gray, J.B., Hohmann, M.G., & Hoffmann, W.A. (2011) Effects of light and temperature on germination of Pyxidanthera brevifolia Wells (Diapensiaceae). Journal of the Torrey Botanical Society, 137: 348-354.

2010

Marchin, R., Zeng, H. and Hoffmann, W. A. (2010). Drought-deciduous behavior reduces nutrient losses from temperate deciduous trees under severe drought. Oecologia, 163:845-854.

Wall, W.A., Douglas, N.A., Xiang, Q.Y., Hoffmann, W.A., Wentworth, T.R., & Hohmann, M.G. Evidence for range stasis during the latter Pleistocene for the Atlantic Coastal Plain endemic genus, Pyxidanthera Michaux. Molecular Ecology, 19:4302-4314.

Silva, L.C.R., Haridasan, M., Sternberg, L.S.L., Franco, A.C., & Hoffmann, W.A. Not all forests are expanding over central Brazilian savannas. Plant and Soil, 333: 431-442.

Scholz, F.G., Bucci, S.J., Hoffmann, W.A., Meinzer, F.C., & Goldstein, G. Hydraulic lift in a Neotropical savanna: Experimental manipulation and model simulations. Agricultural and Forest Meteorology, 150: 629-639.

Gotsch, S.G., Geiger, E.L., Franco, A.C., Goldstein, G., Meinzer, F.C., Hoffmann, W.A. (2010) Allocation to leaf area and sapwood area affects water relations of co-occurring savanna and forest trees. Oecologia, 163:291-301.

2009

Zhang, Y.-J., Meinzer, F.C., Hao, G-Y., Scholz, F.G., Bucci, S.J., Giraldo, J.P., Cao, K-F., Franco, A.C., Hoffmann, W.A., and Goldstein, G. (2009) Size-dependent mortality in a Neotropical savanna tree: the role of height-related adjustments in hydraulic architecture and carbon allocation Plant Cell and Environment, 32:1456-1466.

Marchin, R.M., Bhandari, R.K., Wall, W.A., Hohmann, M.G., Gray, J.B., Hoffmann, W.A. (2009) Are rare species less shade tolerant than common species in fire-prone environments? A test with seven Amorpha (Fabaceae) species. Plant Ecology, 205:249–260.

Giambelluca, T.W., Scholz, F.G., Bucci, S.J., Meinzer, F.C., Goldstein, G., Hoffmann, W.A., Franco, A.C., Buchert, M.P. (2009) Evapotranspiration and energy balance of Brazilian savannas with contrasting tree density. Agricultural and Forest Meteorology, 149:1365-1376.

Rossatto, D.R., Hoffmann, W.A., Franco, A.C. (2009) Differences in growth patterns between co-occurring forest and savanna species affect the forest-savanna boundary. Functional Ecology, 23: 689-698.

Rossatto, D.R., Hoffmann, W.A., Franco, A.C. (2009) Características estomáticas de pares congenéricos de cerrado e mata de galeria crescendo numa região transicional no Brasil central (Stomatal characteristic of congeneric savanna and forest species growing in a transitional region of central Brazil). Acta Botanica Brasilica 23:499-508.

Hoffmann, W.A., Franco, A.C. (2009) The importance of evolutionary history in studies of plant physiological ecology: examples from cerrados and forests of central Brazil. Special issue of Brazilian Journal of Plant Physiology, 20:247-256

Hoffmann, W.A., R. Adasme, M. Haridasan,  M. Carvalho, E. L. Geiger, M. A. B. Pereira, S. G. Gotsch, and A. C. Franco (2009). Tree topkill, not mortality, governs the dynamics of alternate stable states at savanna-forest boundaries under frequent fire in central Brazil.  Ecology 90:1326-1337.

2008

Silva, L.C.R, L. Sternberg, M. Haridasan, W. Hoffmann, F. Miralles-Wilhelm. A. C Franco (2008)  Expansion of gallery forests into central Brazilian savannas. Global Change Biology, 14, 2108-2118.

Hao, G.-Y. Hoffmann, W.A. Scholz, F.G. Bucci, S.J. Meinzer, F.C. Franco, A.C. Cao, K.-F. Goldstein, G. (2008)  Stem and leaf hydraulics of congeneric tree species from adjacent tropical savanna and forest ecosystems. Oecologia 155:405-415.

Goldstein, G, Meinzer, F.C. Bucci, S.J., Scholz, F.G. Franco, A.C. and Hoffmann, W.A.  (2008) Water economy of Neotropical savanna trees: six paradigms revisited.  Tree Physiology 28:395–404.

Hoffmann, W.A. and M. Haridasan (2008) The invasive grass, Melinis minutiflora, inhibits tree regeneration in a Neotropical Savanna. Austral Ecology 33:29-36.

2007

Jackson, R.B., Farley, K.A., Hoffmann, W.A., Jobbagy, E.G., McCulley, R.L. (2007)  Carbon and water tradeoffs in conversions to forests and shrublands. Pp 237-246 in J. Canadell, D. Pataki, L. Pitelka (eds.) Terrestrial Ecosystems in a Changing World.

Jackson, R. B., W. T. Pockman, W. A. Hoffmann, T. M. Bleby, and C. Armas.  2007. Structure and function of root systems. Pp 151-173 in F. I. Pugnaire and F. Valladeres (eds). Handbook of Plant Functional Ecology, 2nd Edition. Marcel Dekker, Inc.

2006

Lahoreau, G., S. Barot, J. Gignoux, W.A. Hoffmann, S.A. Setterfield, and P. R. Williams. 2006. Positive effect of seed size on seedling survival in fire-prone savannas of Australia, Brazil and West Africa.  Journal of Tropical Ecology, 22:719-722 .

2005

Hoffmann, W.A., Silva, E.R., Machado, G.C., Bucci, S.J., Scholz, F.G., Goldstein, G., Meinzer, F.C.  2005. Seasonal leaf dynamics across a tree density gradient in a Brazilian savanna.  Oecologia, 145: 307-316.

Hoffmann, W.A., Franco, A.C., Moreira, M.Z., Haridasan, M.  2005. Specific leaf area explains differences in leaf traits between congeneric savanna and forest trees. Functional Ecology  19: 932-940.

Sternberg, L.S.L., Bucci, S., Franco, A.C., Goldstein, G., Hoffmann, W.A., Moreira, M.Z., Scholz, F. 2005. Long range lateral root activity by Neo-tropical savanna trees. Plant and Soil, 270:169-178.

Hoffmann, W.A. 2005. Ecologia comparativa de espécies lenhosas de cerrado e de mata (Comparative ecology of savanna and forest woody plants). Pp. 155- 166 in A. Scariot, J. M. Felfili, and J. C. Sousa-Silva (eds.) Cerrado: Ecologia, Biodiversidade e Conservação, Ministério do Meio Ambiente, Brasília, Brazil.

2004

Hoffmann, W.A., Orthen, B. and Franco, A.C. 2004. Constraints to seedling success of savanna and forest trees across the savanna-forest boundary.  Oecologia 140:252-260.

Hoffmann, W.A., Lucatelli, V. M. P. C., Silva, F. J., Azeuedo, I. N. C., Marinho, M. da S., Albuquerque, A. M. S., Lopes, A. de O., Moreira, S. P. 2004. Impact of the invasive grass Melinis minutiflora at the savanna-forest ecotone in the Brazilian Cerrado. Diversity and Distributions, 10: 99-103.

Bucci S.J., Scholz F.G., Goldstein G., Meinzer F.C , Hinojosa J.A., Hoffmann W.A., and Franco, A.C. 2004. Processes preventing nocturnal equilibrium between leaf and soil water potential in tropical savanna woody species, Tree Physiology, 24: 1119-1127.

2003

Hoffmann, W.A., B. Orthen, and P.K.V. Nascimento. 2003. Comparative fire ecology of tropical savanna and forest trees. Functional Ecology, 17: 720-726

Hoffmann, W.A., W. Schroeder and R.B. Jackson. 2003. Regional feedbacks among climate, fire, and tropical deforestation. Journal of Geophysical Research – Atmospheres, 108, DOI: 2003JD003494.

Hoffmann, W.A. and O.T. Solbrig.  2003. The role of topkill in the differential response of savanna woody species to fire.  Forest Ecology and Management, 180:273-286.

Hoffmann, W.A. and A.C. Franco. 2003. Comparative growth analysis of tropical savanna and forest trees using phylogenetically-independent contrasts. Journal of Ecology, 91: 475-484.

2002

Hoffmann, W. A., W. Schroeder, and R. B. Jackson. 2002. Positive feedbacks of fire, climate, and vegetation change and the conversion of tropical savannas. Geophysical Research Letters, 15: doi: 10.1029/2002GL015424

Dickinson, R.E., J.A. Berry, G.B. Bonan, G.J. Collatz, C.B. Field, I.Y. Fung, M. Goulden, W.A. Hoffmann, R. Jackson, R. Myneni, P. Sellers, M. Shaikh. 2002. Nitrogen controls on climate model evapotranspiration.  Journal of Climate, 15:278-295.

Hoffmann, W.A. and H. Poorter. 2002. Avoiding bias in calculations of relative growth rate. Annals of Botany 80:37-42.

Hoffmann, W.A. 2002. Direct and indirect effects of fire on radial growth of cerrado savanna trees.  Journal of Tropical Ecology 18:137-142.

Silva, G.F., R.L.C. Ferreira, W.A. Hoffmann, N.C. Fiedler, G. Janin. 2002. Optimization applied to management of natural forests.  ETFRN News 36: 26-27.

Hoffmann, W.A. and Moreira, A.G.  2002 The Role of Fire in Population Dynamics of Woody Plants, Pp. 159-177 in P.S. Oliveira and R.J. Marquis (eds.) The Cerrados of Brazil: Ecology and Natural History of a Neotropical Savanna, Columbia University Press, New York.

2000

Hoffmann, W.A., F.A. Bazzaz, N.J. Chatterton, P. Harrison, and R.B. Jackson. 2000. Elevated CO2 enhances resprouting of a tropical savanna tree.  Oecologia, 123(3) 312-317.

Hoffmann, W. A. and R.B. Jackson. 2000. Vegetation-climate feedbacks in the conversion of tropical savanna to grassland.  Journal of Climate 13:1593-1602.

Hoffmann, W. A. 2000.  Post-establishment seedling success of savanna and forest species in the Brazilian Cerrado. Biotropica, 32(1):62-69

1999

Jackson R.B., L. A Moore, W. A. Hoffmann, W. T. Pockman, and C. R. Linder. 1999. Ecosystem rooting depth determined with caves and DNA. Proceedings of the National Academy of Science 96:11387-11392.

Hoffmann, W. A. 1999. Fire and population dynamics of woody plants in a Neotropical savanna: matrix model predictions. Ecology 80:1354-1369.

Jackson, R. B., W. T. Pockman, and W. A. Hoffmann. 1999. Structure and function of root systems. Pp 195-220 in: F. I. Pugnaire and F. Valladeres (eds). Handbook of Plant Functional Ecology, 1st Edition. Marcel Dekker, Inc.

1998

Hoffmann, W. A. 1998. Post-burn reproduction of woody plants in a Neotropical savanna: the relative importance of sexual and vegetative reproduction. Journal of Applied Ecology 35:422-433.

1996

Hoffmann, W. A. 1996. The effects of cover and fire on seedling establishment in a neotropical savanna. Journal of Ecology. 84:383-393

Archer, S., M. Coughenour, C. Dall'Aglio, C. W. Fernandez, J. Hay, W. Hoffmann, C. Klink, J. F. Silva, and O. T. Solbrig. 1996. Savanna biodiversity and ecosystem properties. Pp 207-215 in O. T. Solbrig, E. Medina, J. F. Silva (eds), Biodiversity and Savanna Ecosystem Properties. Springer-Verlag, Berlin.