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Monday, April 9 • 5:30pm - 7:00pm
POSTER: Forest Species Composition and Cooccurrence with Archaeological Sites in Southern Brazil

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AUTHORS: Aline Cruz*, Nivaldo Peroni, Lucas Bueno – Federal University of Santa Catarina

ABSTRACT: Knowledge about the historical interaction between humans and forests can bring a new insight about conservation strategies, allowing to understand the effects of the past actions. Considering that the composition of species is influenced by the landscape, and the landscape is historically shaped by the human action, we investigated whether the current composition of tree species could reflect the use of forests during the pre-Columbian period, in southern Brazil. The study area is Itajaí River Basin, where there are 227 archaeological sites described. The earliest dating is 8,090 ± 50 years ago, and the most recent one dating back 300 ± 30 years. The vegetation is part of Atlantic Forest domain, and comprises the Mixed Ombrophilous (high altitudes) and Dense Ombrophilous (low altitudes) forest formations. The vegetation was inventoried by the Forest Floristic Inventory of Santa Catarina (FFISC). Using Maxent software, we performed a predictive modeling of the distribution of archaeological sites using the geographical location of sites and environmental variables (topographic and water availability). For the model validation, we used the Area Under Curve (AUC) method. The AUC was 0.805, with a standard deviation of 0.036. Using the predictive map, we classified the forest sample units as their probability of occurrence overlapping with the sites. We applied a generalized linear multivariate model in environment R, using the mvabund library, using the abundance matrix as response variable and the probability of overlapping with archaeological sites as an explanatory variable. The model indicated a significant relationship (P

Monday April 9, 2018 5:30pm - 7:00pm CDT
Monroe Room