Biomass and productivity of the woody strata of forested bogs in northern Minnesota.

D. F. Grigal, C. G. Buttleman, L. K. Kernik

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Abstract

The tree stratum was dominated by Picea mariana, and the low shrub stratum by Ledum groenlandicum and Chamaedaphne calyculata. Aboveground living biomass of the tree stratum on 3 perched bogs was declining by 0.5 t ha-1 yr-1 from a base of 100.7 t ha-1, and on 3 raised bogs it was increasing by 0.2 t ha-1 yr-1 on a base of 31.0 t ha-1. Net primary productivity of that stratum was 3.1 and 1.0 t ha-1 yr- 1 on perched and raised bogs, respectively. Low shrub aboveground productivity, equal to mortality, was 0.4 and 2.0 t ha-1 yr-1 on perched and raised bogs, respectively, c40% of the standing biomass of shrubs in both bog types. Aboveground net primary productivity of woody strata was 3.5 and 3.0 t ha-1 yr-1 on perched and raised bogs, respectively. Data are comparable to earlier estimates of Sphagnum production on the same bogs: 3.8 t ha-1 yr-1 on perched bogs and 3.2 t ha-1 yr-1 on raised bogs. Vascular herbs contributed an additional 0.2 t ha-1 yr-1 to aboveground production on perched bogs and 0.1 t ha-1 yr-1 on raised bogs. The higher productivity of perched bogs is probably related to slightly higher nutrient status related to their landscape position. -from Authors

Original languageEnglish (US)
Pages (from-to)2416-2424
Number of pages9
JournalCanadian Journal of Botany
Volume63
Issue number12
DOIs
StatePublished - Jan 1 1985

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