Consequences of defaunation for a tropical tree community.

Hunting affects a considerably greater area of the tropical forest biome than deforestation and logging combined. Often even large remote protected areas are depleted of a substantial proportion of their vertebrate fauna. However, understanding of the long-term ecological consequences of defaunation in tropical forests remains poor. Using tree census data from a large-scale plot monitored over a 15-year period since the approximate onset of intense hunting, we provide a comprehensive assessment of the immediate consequences of defaunation for a tropical tree community. Our data strongly suggest that over-hunting has engendered pervasive changes in tree population spatial structure and dynamics, leading to a consistent decline in local tree diversity over time. However, we do not find any support for suggestions that over-hunting reduces above-ground biomass or biomass accumulation rate in this forest. To maintain critical ecosystem processes in tropical forests increased efforts are required to protect and restore wildlife populations.

[1]  F. Putz,et al.  Ecological studies of lianas in Lambir National Park, Sarawak, Malaysia , 1987 .

[2]  J. Caldecott.  Hunting and wildlife management in Sarawak , 1988 .

[3]  K. Redford.  The Empty Forest Many large animals are already ecologically extinct in vast areas of neotropical forest where the vegetation still appears intact , 1992 .

[4]  S. Wright,et al.  THE EL NINO SOUTHERN OSCILLATION, VARIABLE FRUIT PRODUCTION, AND FAMINE IN A TROPICAL FOREST , 1999 .

[5]  John G. Robinson.  Losing the fat of the land , 1999 .

[6]  John G. Robinson,et al.  Hunting for Sustainability in Tropical Forests , 1999 .

[7]  L. Curran,et al.  VERTEBRATE RESPONSES TO SPATIOTEMPORAL VARIATION IN SEED PRODUCTION OF MAST-FRUITING DIPTEROCARPACEAE , 2000 .

[8]  R. Ibáñez,et al.  Poachers Alter Mammal Abundance, Seed Dispersal, and Seed Predation in a Neotropical Forest , 2000 .

[9]  S. Davies.  TREE MORTALITY AND GROWTH IN 11 SYMPATRIC MACARANGA SPECIES IN BORNEO , 2001 .

[10]  J. A. Simonetti,et al.  Plant‐Mammal Interactions in Tropical Bolivian Forests with Different Hunting Pressures , 2001 .

[11]  A decade of canopy-tree seedling survival and growth in two Bornean rain forests: persistence and recovery from suppression , 2002, Journal of Tropical Ecology.

[12]  S. Joseph Wright,et al.  The myriad consequences of hunting for vertebrates and plants in tropical forests , 2003 .

[13]  Iain R. Lake,et al.  Extent of Nontimber Resource Extraction in Tropical Forests: Accessibility to Game Vertebrates by Hunters in the Amazon Basin , 2003 .

[14]  M. Potts.  Drought in a Bornean everwet rain forest , 2003 .

[15]  Tropical Rain Forests: An Ecological and Biogeographical Comparison , 2005 .

[16]  J. Chambers,et al.  Tree allometry and improved estimation of carbon stocks and balance in tropical forests , 2005, Oecologia.

[17]  Stuart J. Davies,et al.  Growth and mortality are related to adult tree size in a Malaysian mixed dipterocarp forest , 2006 .

[18]  Joshua B Plotkin,et al.  Seed Dispersal and Spatial Pattern in Tropical Trees , 2006, PLoS biology.

[19]  Tetsuzo Yasunari,et al.  Irregular droughts trigger mass flowering in aseasonal tropical forests in asia. , 2006, American journal of botany.

[20]  P. Jordano,et al.  Seed survival and dispersal of an endemic Atlantic forest palm: the combined effects of defaunation and forest fragmentation , 2006 .

[21]  S. Hubbell,et al.  Seed predation during general flowering events of varying magnitude in a Malaysian rain forest , 2007 .

[22]  Noelle G. Beckman,et al.  Differential Effects of Hunting on Pre‐Dispersal Seed Predation and Primary and Secondary Seed Removal of Two Neotropical Tree Species , 2007 .

[23]  H. Muller‐Landau.  Predicting the Long‐Term Effects of Hunting on Plant Species Composition and Diversity in Tropical Forests , 2007 .

[24]  C. Peres,et al.  Basin‐Wide Effects of Game Harvest on Vertebrate Population Densities in Amazonian Forests: Implications for Animal‐Mediated Seed Dispersal , 2007 .

[25]  R. Condit,et al.  The Bushmeat Harvest Alters Seedling Banks by Favoring Lianas, Large Seeds, and Seeds Dispersed by Bats, Birds, and Wind , 2007 .

[26]  C. Peres,et al.  Hunting and Plant Community Dynamics in Tropical Forests: A Synthesis and Future Directions , 2007 .

[27]  H. Howe,et al.  Bushmeat and the Fate of Trees with Seeds Dispersed by Large Primates in a Lowland Rain Forest in Western Amazonia , 2007 .

[28]  T. Smith,et al.  Hunting of Mammals Reduces Seed Removal and Dispersal of the Afrotropical Tree Antrocaryon klaineanum (Anacardiaceae) , 2007 .

[29]  O. Olsson,et al.  Hunting reduces recruitment of primate-dispersed trees in Amazonian Peru , 2008 .

[30]  Nigel,et al.  Tree recruitment in an empty forest. , 2008, Ecology.

[31]  Bette A. Loiselle,et al.  Dispersal in a Neotropical tree, Virola flexuosa (Myristicaceae): does hunting of large vertebrates limit seed removal? , 2009, Ecology.

[32]  C. Peres,et al.  Priority areas for the conservation of Atlantic forest large mammals , 2009 .

[33]  J. Brodie,et al.  Bushmeat poaching reduces the seed dispersal and population growth rate of a mammal-dispersed tree. , 2009, Ecological applications : a publication of the Ecological Society of America.

[34]  J. Fa,et al.  Impacts of hunting on mammals in African tropical moist forests: a review and synthesis , 2009 .

[35]  H. Howe,et al.  Recruitment of Hornbill‐Dispersed Trees in Hunted and Logged Forests of the Indian Eastern Himalaya , 2009, Conservation biology : the journal of the Society for Conservation Biology.

[36]  J. Brodie,et al.  Bushmeat hunting as climate threat. , 2009, Science.

[37]  P. Forget,et al.  Bushmeat Hunting Alters Recruitment of Large‐seeded Plant Species in Central Africa , 2010 .

[38]  Bushmeat hunting and climate: an indirect link. , 2010, Science.

[39]  J. Ghazoul.  Reviewing Peer Review , 2011 .

[40]  Julia P. G. Jones,et al.  Analysis of Patterns of Bushmeat Consumption Reveals Extensive Exploitation of Protected Species in Eastern Madagascar , 2011, PloS one.

[41]  P. Stevenson.  The Abundance of Large Ateline Monkeys is Positively Associated with the Diversity of Plants Regenerating in Neotropical Forests , 2011 .

[42]  R. Harrison.  Emptying the Forest: Hunting and the Extirpation of Wildlife from Tropical Nature Reserves , 2011 .

[43]  C. Peres,et al.  The empty forest revisited , 2011, Annals of the New York Academy of Sciences.

[44]  Haldre S. Rogers,et al.  Seed dispersal in changing landscapes. , 2012 .

[45]  Matteo Detto,et al.  Fitting Ecological Process Models to Spatial Patterns Using Scalewise Variances and Moment Equations , 2013, The American Naturalist.

[46]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[47]  E. Stokstad.  The empty forest. , 2014, Science.