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  • 1985-1989  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Plant ecology 85 (1989), S. 1-11 
    ISSN: 1573-5052
    Keywords: Foliage-height profile ; LAI ; Leaf community ; Litter phenology ; Stratification ; Vertical structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A combination of optical measurements of leaf heights and observations on litterfall provided a vertical and temporal description of the leaf community structure in a tall, Liriodendron forest on the Maryland coastal plain. Leaf area, mass, and number were bimodally distributed with height. Median leaf number occurs far below (7–8 m) and median leaf mass far above (22–23 m) the median leaf area (18–19 m). Tree species exhibited leaf stratification into 3 height levels: understory (0–10 m), mid canopy (10–25 m), and overstory (25–37 m). Species leaf area in litterfall was related to the species basal area, although representation of leaf number in litterfall was not correlated with stem numbers for species in the stand. Species also showed a clear phenological sequence of leaf fall.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Plant ecology 80 (1989), S. 167-181 
    ISSN: 1573-5052
    Keywords: DCA ; Indicator analysis ; Ordination ; TWINSPAN
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Data from 300 forest stands, scattered over 29 states within the eastern North American deciduous forest, were subjected to detrended correspondence analysis (DCA) and two-way indicator species analysis (TWINSPAN) in an effort to identify classifiable units. Most species are widespread which provide a great deal of continuity in the vegetation. The deciduous forest can be divided into three forest regions: (1) northern, (2) central and (3) southern. The northern region corresponds to the hemlock-white pine-northern hardwood forest of Braun (1950). The central region includes the beech-maple and oak-hickory forests. The beech-maple as identified here includes the mixed mesophytic, beech-maple, maple-basswood and about half of the western mesophytic forests of Braun (1950). The oak-hickory includes Braun's oak-hickory, oak-chestnut and about half of the western mesophytic forests. The southern region coincides with the southern mixed hardwood forests.
    Type of Medium: Electronic Resource
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