Regional variability in nitrogen mineralization, nitrification, and overstory biomass in northern Lower Michigan

D. R. Zak, G. E. Host, K. S. Pregitzer

Research output: Contribution to journalArticle

106 Scopus citations

Abstract

Potential net N mineralization, potential net nitrification, and overstory (boles and branches) biomass were measured in 9 forest ecosystems commonly found within the well-drained uplands of northern Lower Michigan. The ecosystem types ranges from oak-dominated forests on coarse-textured outwash sands to mesic northern hardwood forests on sandy glacial till. Overstory biomass ranged from 92 t.ha -1 in a xeric oak ecosystem to 243 t.ha-1 in a northern hardwood ecosystem; annual biomass production ranged from 1.3-3.5 t.ha-1.yr-1 respectively. Potential net N mineralization was lowest in the xeric oak ecosystem (52.0 μg N.g-1) and greatest in the mesic northern hardwood ecosystem (127.8 μg N.g-1). Potential net nitrification was 45.5 μg NO3 --N.g-1 in the northern hardwood ecosystem; 10-230 times greater than in other ecosystems. Maximum overstory biomass and biomass increment predicted were 247 t.ha-1 and 3.7 t.ha-1, respectively. The exponential function used to predict biomass increment from N mineralization suggests that the productivity of some northern hardwood forests in northern Lower Michigan is not limited by N availability. -from Authors

Original languageEnglish (US)
Pages (from-to)1521-1526
Number of pages6
JournalCanadian Journal of Forest Research
Volume19
Issue number12
DOIs
StatePublished - Jan 1 1989

Fingerprint Dive into the research topics of 'Regional variability in nitrogen mineralization, nitrification, and overstory biomass in northern Lower Michigan'. Together they form a unique fingerprint.

  • Cite this