| A long-term goal of the International Geosphere-Biosphere Program (IGBP) is to establish a Dynamic Global Vegetation Model (DGVM). The Funiu Mountain National Nature Reserve is located in the evergreen broad-leaved forest (EBLF)/deciduous broad-leaved forest (DBLF) ecotone. It contributes to conserving global biodiversity and maintaining ecosystem functioning. This study was conducted in the Funiu Mountain National Nature Reserve. We categorized the forest plants into plant functional groups and analyzed their distributions in relation to different environmental factors.Using community ecology techniques, we examined the influences of elevation on plant functional group dynamics and population interactions on the southern slope of the Funiu Mountain[0] at elevations between 640 m and 1770 m as well as on the northern slope the Funiu Mountain at elevations between 855 m and 1920 m. The results indicated that temperature and moisture, largely determined by elevation, are the most important environmental factors affecting the distribution of plant functional groups. Species importance values were significantly correlated with elevation, except those of Quercus acutidentata of the tree layer and Lespedeza bicolor of the shrub layer on the southern side of the Funiu Mountain. Plant functional groups showed identical zonation patterns on both sides of the mountain, while distributions of individual species differed significantly.We measured ecophysiological characteristics of the dominant species (Q. acutidentata, Q. glandulifera, Carpinus cordata, Forsythia suspensa, Carex siderosticta,Carex lanceolata, Rodgersia aesculifolia) in 12 plots using LI-6400 portable photosynthesis system and FMS-2 portable pulse-amplitud modulation fluorometer. The results showed that minimal fluorescence (Fo) was positively correlated with temperature and negatively correlated with moisture; for electron transport (ETR) and photosynthesis rate (Pn) the opposite was true.
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