Ecosystems

, Volume 11, Issue 2, pp 325–341

Fine Root Dynamics and Forest Production Across a Calcium Gradient in Northern Hardwood and Conifer Ecosystems

  • Byung Bae Park
  • Ruth D. Yanai
  • Timothy J. Fahey
  • Scott W. Bailey
  • Thomas G. Siccama
  • James B. Shanley
  • Natalie L. Cleavitt
Article

DOI: 10.1007/s10021-008-9126-3

Cite this article as:
Park, B.B., Yanai, R.D., Fahey, T.J. et al. Ecosystems (2008) 11: 325. doi:10.1007/s10021-008-9126-3

Abstract

Losses of soil base cations due to acid rain have been implicated in declines of red spruce and sugar maple in the northeastern USA. We studied fine root and aboveground biomass and production in five northern hardwood and three conifer stands differing in soil Ca status at Sleepers River, VT; Hubbard Brook, NH; and Cone Pond, NH. Neither aboveground biomass and production nor belowground biomass were related to soil Ca or Ca:Al ratios across this gradient. Hardwood stands had 37% higher aboveground biomass (P = 0.03) and 44% higher leaf litter production (P < 0.01) than the conifer stands, on average. Fine root biomass (<2 mm in diameter) in the upper 35 cm of the soil, including the forest floor, was very similar in hardwoods and conifers (5.92 and 5.93 Mg ha−1). The turnover coefficient (TC) of fine roots smaller than 1 mm ranged from 0.62 to 1.86 y−1 and increased significantly with soil exchangeable Ca (P = 0.03). As a result, calculated fine root production was clearly higher in sites with higher soil Ca (P = 0.02). Fine root production (biomass times turnover) ranged from 1.2 to 3.7 Mg ha−1 y−1 for hardwood stands and from 0.9 to 2.3 Mg ha−1 y−1 for conifer stands. The relationship we observed between soil Ca availability and root production suggests that cation depletion might lead to reduced carbon allocation to roots in these ecosystems.

Keywords

aboveground biomassaboveground productionacid rainCone Pondfine root biomassfine root turnoverfine root productionHubbard BrookSleepers River

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Byung Bae Park
    • 1
    • 2
  • Ruth D. Yanai
    • 1
  • Timothy J. Fahey
    • 3
  • Scott W. Bailey
    • 4
  • Thomas G. Siccama
    • 5
  • James B. Shanley
    • 6
  • Natalie L. Cleavitt
    • 3
  1. 1.Forest and Natural Resources ManagementSUNY College of Environmental Science and ForestrySyracuseUSA
  2. 2.Division of Forest EcologyKorea Forest Research InstituteSeoulSouth Korea
  3. 3.Department of Natural ResourcesCornell UniversityIthacaUSA
  4. 4.USDA Forest Service, Northern Research StationCamptonUSA
  5. 5.Yale School of Forestry and Environmental StudiesNew HavenUSA
  6. 6.Water Resources DisciplineUS Geological SurveyMontpelierUSA