Abstract # 2670 Poster # 139:

Scheduled for Sunday, September 20, 2009 06:30 PM-09:00 PM: Session 14 (Mission Bay Ballroom CDE) Poster Presentation


SOME PREDICTABLE ECOLOGICAL VARIABLES FOR GUENON BIOMASS OF THREE SIZE CLASSES

R. Matsuda Goodwin1,2
1Fordham University, Bronx, NY 10458, USA, 2National Institute of Informatics, Japan
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In African forests, arboreal guenons (genus Cercopithecus) make up the bulk of primate biomass after colobines (subfamily Colobinae). To explore whether some gross ecological variables predict the biomass of guenons of 3 different size classes, this study examined the documented biomass of anthropoid primates and various ecological variables (e.g., precipitation, # of dry months, Temperature-to-Precipitation (T/P) Ratio (seasonality index), % of Caesalpinioideae, soil PH) collected from six African forests where three size classes of guenons and colobines co-occur. Multivariate linear regression revealed that the seed-eating colobine biomass, soil pH, and T/P Ratio are high predictors of the biomass of three body classes of guenons. F-tests for adjusted R-squared values [α=0.05] for small guenons, medium guenons, and large guenons were significant; 0.978, 0.984, 0.941, respectively. In addition, for large guenons, the biomass of seed-eating colobines itself was a significant predictor [adjusted R2=0.950] and the biomass of all colobines was a significant predictor for the biomass of small guenons [adjusted R2=0.840]. These results indicate that soil pH and seasonality play a more important role in determining the biomass of medium guenons, since colobine biomass itself was not a good predictor of biomass of this body size class.