Lindbladh, Matts
- Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences
Abstract
Given the difficulty of separating the three Picea species-P. glauca, P. mariana, and P. rubens (white, black, and red spruce)-in the pollen record, little is known about their unique histories in eastern North America following deglaciation. Here we report the first use of a classification tree analysis (CART) to distinguish pollen grains of these species. It was successfully applied to fossil pollen from eight sites in Maine and one in Massachusetts. We focused on the late glacial/early Holocene (14,000 to 8000 cal yr B.P.) and the late Holocene (1400 cal yr B.P. to present)the two key periods since deglaciation when Picea has been abundant in the region. The result shows a shift from a Picea forest of P. glauca and P. mariana in the late glacial to a forest of P. rubens and P. mariana in the late Holocene. The small number of P. rubens grains identified from the late glacial/early Holocene samples (
Keywords
CART; classification tree; forest history; late glacial; late holocene; Maine; paleoccology; Picea glauca; Picea mariana; Picea rubens; pollen analysis
Published in
Quaternary Research
2003, volume: 59, number: 1, pages: 61-69
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
SLU Authors
UKÄ Subject classification
Environmental Sciences and Nature Conservation
Publication identifier
- DOI: https://doi.org/10.1016/S0033-5894(02)00023-6
Permanent link to this page (URI)
https://res.slu.se/id/publ/614