How does inter-species variation in phenology impact net primary production in the PnET-II carbon simulation model?
Chiang (jc293302@ohio.edu), Jyh-Min *,1, Brown, Kim1, 1 Ohio University;, Athens, OH ABSTRACT- The timing of leaf expansion in spring and leaf senescence in fall determines growing season length; hence, phenology is important in modeling carbon production. Previous work monitoring net ecosystem exchange using eddy flux technology found phenology to be a key factor as to whether these sites are net carbon sources or sinks. Growing degree days (sum of daily mean temperature above 0°C as defined by the PnET-II forest carbon simulation model) have long been used to track tree phenological behavior. It is notable that different tree species have different phenological responses to GDD, and that phenological responses to GDD also vary within a species range. The goal of this research is to parameterize the PnET-II model for current and future potential tree species communities in eastern Ohio. To do this, we must accurately determine the inter- and intra-species differences in phenological r
