Comparative collections and databases of plant structures: support to palaeoecologic and palaeoethnobotanical studies

Abstract

Interpretation of Quaternary palaeoenvironmental and palaeoclimatic data relies upon comparison with extant ecosystems. For that reason, palaeoecologic studies based in plant micro- or macro-remains analyses depend on a good knowledge of the present flora and vegetation, as well as of the morphologic characteristics and structure of the analyzed elements. Constitution of comparative collections and databases is an invaluable tool to these studies, especially in tropical regions, where the high biodiversity engenders as yet a poor knowledge of the morphology and structure of plant remains susceptible of preservation in sediments (palinomorphs, wood, charcoal, phytoliths etc.). Reference collections of wood, charcoal, pollen grains, phytoliths, and seeds are being assembled through field trips and institutional donations. Databases associated to computer-based determination keys to anthracology and palynology are also under development.