Variation in overstory biomass among glacial landforms and ecological land units in northwestern Lower Michigan

G. E. Host, K. S. Pregitzer, C. W. Ramm, D. P. Lusch, D. T. Cleland

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49 Scopus citations

Abstract

Variation in overstory biomass and mean annual biomacc increment (MABI) of upland forest stands was studied at 2 spatial scales: glacial landforms (1:250 000-1:1000 000) and ecological land units (1:10 ooo-1:80 000). Ecological land units were defined based on combinations of ground-flora vegetation, soil and physiography. Overstory biomass ranged from 105 t/ha (MABI = 1.5 t ha-1yr-1) on glacial outwash landforms to 208 t/ha (MABI = 3.2 t ha-1yr-1) on morainal landforms; 37% of the total variation in biomass was accounted for by landform. Analysis at the ecological land unit scale accounted for a higher proportion of variation c60% of the total. Overstory biomass among ecological land units ranged from 85 t/ha(MABI) = 1.3 t ha-1yr-1) for oak-dominated forests occurring on xeric sandy outwash sediments to almost 250 tHa(<MABI = 3.6 t ha-1yr-1) for sugar maple-red oak (Acer saccharum-Quercus rubra) forests occurring in mesic morainal positions. Variation in biomass appeared to be strongly related to differences in species composition and variation in soil moisture availability. A relatively strong association between ground-flora composition and productivity was indicated. -from Authors

Original languageEnglish (US)
Pages (from-to)659-668
Number of pages10
JournalCanadian Journal of Forest Research
Volume18
Issue number6
DOIs
StatePublished - Jan 1 1988

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