Rainfall and temperature affect tree species distribution in Ghana

Abstract: We evaluated the relative importance of annual rainfall, temperature and their seasonality to tree species distribution in Ghana. We used species presence/absence data from 2505 1-ha plots systematically distributed over Ghana's forests. Logistic regression was used to determine species responses to four climatic variables generated from the Worldclim database. The distribution of 95% of 20 species was significantly associated with annual rainfall, 60% with rainfall seasonality, 45% with isothermality and 40% with temperature seasonality. Annual rainfall explained on average most of the variation (17%, range = 0.5–52%) in species distribution, followed by rainfall seasonality 5% (range = 0.5–27%), isothermality 4% (range = 0.8–24%) and temperature seasonality 1% (range = 0.4–4.5%). Our results suggest that, out of the climatic variables investigated, rainfall is the main factor determining tree species distribution in Ghana; temperature also influences the distribution of a number of species, although it explains much less of the variation. The reduction in annual rainfall that prevailing climate-change scenarios predict for the region will result in a shift in the distribution of most species, whereas the predicted increase in temperature variation is likely to have little effect.

[1]  Michael L. Goulden,et al.  Are tropical forests near a high temperature threshold , 2008 .

[2]  S. Solomon.  IPCC (2007): Climate Change The Physical Science Basis , 2007 .

[3]  W. D. Hawthorne,et al.  Ecological Profiles of Ghanaian Forest Trees , 1995 .

[4]  C. Metz.  Basic principles of ROC analysis. , 1978, Seminars in nuclear medicine.

[5]  Eric A Davidson,et al.  Drought effects on litterfall, wood production and belowground carbon cycling in an Amazon forest: results of a throughfall reduction experiment , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[6]  P. Baker,et al.  Temperature and rainfall strongly drive temporal growth variation in Asian tropical forest trees , 2013, Oecologia.

[7]  W. D. Hawthorne,et al.  Woody Plants of Western African Forests: A Guide to the Forest Trees, Shrubs and Lianes from Senegal to Ghana , 2008 .

[8]  D. Nepstad,et al.  Mortality of large trees and lianas following experimental drought in an Amazon forest. , 2007, Ecology.

[9]  Scott D. Miller,et al.  DIEL AND SEASONAL PATTERNS OF TROPICAL FOREST CO2 EXCHANGE , 2004 .

[10]  J. Pausas,et al.  Patterns of plant species richness in relation to different environments: An appraisal , 2001 .

[11]  Simon L Lewis,et al.  Drought-induced shifts in the floristic and functional composition of tropical forests in Ghana. , 2012, Ecology letters.

[12]  M. Swaine,et al.  Distribution and Ecology of Vascular Plants in a Tropical Rain Forest. Forest Vegetation in Ghana. , 1981 .

[13]  C. D. Keeling,et al.  Tropical rain forest tree growth and atmospheric carbon dynamics linked to interannual temperature variation during 1984–2000 , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[14]  Stephen P. Hubbell,et al.  Drought sensitivity shapes species distribution patterns in tropical forests , 2007, Nature.

[15]  M. Swaine,et al.  Rainfall and soil fertility as factors limiting forest species distributions in Ghana , 1996 .

[16]  M. Swaine,et al.  Classification and ecology of closed-canopy forest in Ghana. , 1976 .

[17]  S. Davies,et al.  The role of desiccation tolerance in determining tree species distributions along the Malay–Thai Peninsula , 2008 .

[18]  M. Austin,et al.  Current problems of environmental gradients and species response curves in relation to continuum theory , 1994 .

[19]  Kenneth J Feeley,et al.  Decelerating growth in tropical forest trees. , 2007, Ecology letters.

[20]  J. Hellmann,et al.  Traits associated with drought survival in three Australian tropical rainforest seedlings , 2011 .

[21]  Tim M. Blackburn,et al.  Do climate envelope models transfer? A manipulative test using dung beetle introductions , 2009, Proceedings of the Royal Society B: Biological Sciences.

[22]  J. L. Parra,et al.  Very high resolution interpolated climate surfaces for global land areas , 2005 .

[23]  Stephen P. Hubbell,et al.  Soil nutrients influence spatial distributions of tropical tree species , 2007, Proceedings of the National Academy of Sciences.

[24]  E. Obuobie,et al.  Analysis of Rainfall Variability in Ghana , 2013 .

[25]  R. Borchert,et al.  Responses of Tropical Trees to Rainfall Seasonality and its Long-Term Changes , 1998 .

[26]  S. Andelman,et al.  Drought-mortality relationships for tropical forests. , 2010, The New phytologist.

[27]  P. Coley,et al.  The effect of soil on the growth performance of tropical species with contrasting distributions , 2008 .

[28]  A. J. Duque.  Plant diversity scaled by growth forms along spatial and environmental gradients , 2004 .

[29]  P. Coley,et al.  Pests vs. drought as determinants of plant distribution along a tropical rainfall gradient. , 2009, Ecology.

[30]  D. Clark,et al.  Environmental controls on net ecosystem‐level carbon exchange and productivity in a Central American tropical wet forest , 2003 .

[31]  Frans Bongers,et al.  Plant Functional Traits and the Distribution of West African Rain Forest Trees along the Rainfall Gradient , 2011 .

[32]  S Joseph Wright,et al.  The future of tropical forests , 2010, Annals of the New York Academy of Sciences.

[33]  Frans Bongers,et al.  Distribution of twelve moist forest canopy tree species in Liberia and Côte d'Ivoire: response curves to a climatic gradient , 1999 .

[34]  F. Bongers,et al.  Patterns and Determinants of Floristic Variation across Lowland Forests of Bolivia , 2011 .

[35]  Shawn W. Laffan,et al.  Global patterns in plant height , 2009 .

[36]  E. Veenendaal,et al.  Responses of West African Forest Tree Seedlings to Irradiance and Soil Fertility , 1996 .

[37]  E. Wood,et al.  Projected changes in drought occurrence under future global warming from multi-model, multi-scenario, IPCC AR4 simulations , 2008 .

[38]  Andy P. Field,et al.  Discovering Statistics Using SPSS , 2000 .

[39]  J. Oksanen,et al.  Continuum theory revisited: what shape are species responses along ecological gradients? , 2002 .

[40]  L. Poorter,et al.  Does a ruderal strategy dominate the endemic flora of the West African forests? , 2007 .

[41]  W. D. Hawthorne,et al.  Holes and the sums of parts in Ghanaian forest: regeneration, scale and sustainable use , 1996 .

[42]  T. Itioka,et al.  Various population fluctuation patterns of light-attracted beetles in a tropical lowland dipterocarp forest in Sarawak , 2000, Population Ecology.

[43]  M. Swaine,et al.  Distribution and ecology of vascular plants in a tropical rain forest , 1981, Geobotany.

[44]  Y. Malhi,et al.  Spatial patterns and recent trends in the climate of tropical rainforest regions. , 2004, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[45]  Bettina M. J. Engelbrecht,et al.  Species distributions in response to individual soil nutrients and seasonal drought across a community of tropical trees , 2013, Proceedings of the National Academy of Sciences.

[46]  C. Braak,et al.  Weighted averaging, logistic regression and the Gaussian response model , 2004, Vegetatio.

[47]  Alain F. Zuur,et al.  A protocol for data exploration to avoid common statistical problems , 2010 .

[48]  A. Newton.  Dynamics of Tropical Communities , 1999 .

[49]  Frans Bongers,et al.  Distribution patterns of tropical woody species in response to climatic and edaphic gradients , 2012 .

[50]  J A Swets,et al.  Measuring the accuracy of diagnostic systems. , 1988, Science.

[51]  O. Phillips,et al.  Continental-scale patterns of canopy tree composition and function across Amazonia , 2006, Nature.

[52]  Knut Rydgren,et al.  Species response curves along environmental gradients. A case study from SE Norwegian swamp forests , 2003 .

[53]  L. Poorter,et al.  Sapling performance along resource gradients drives tree species distributions within and across tropical forests , 2014 .

[54]  Simon Ferrier,et al.  Evaluating the predictive performance of habitat models developed using logistic regression , 2000 .

[55]  T. M. Smith,et al.  A new model for the continuum concept , 1989 .

[56]  M. Austin,et al.  A new model for the continuum concept , 1989, Vegetatio.

[57]  Steven F. Oberbauer,et al.  Annual wood production in a tropical rain forest in NE Costa Rica linked to climatic variation but not to increasing CO2 , 2010 .

[58]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .