Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures

Ramesh Murthy, Kevin L. Griffin, Stanley J. Zarnoch, Phillip M. Dougherty, Barbara Watson, Joost L M Van Haren, Randy L. Patterson, Tilak Mahato

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Because of scaling problems point measurements of soil CO2 efflux on a small volume of soil may not necessarily reflect an overall community response. The aim of this study was to test this hypothesis in the Biosphere 2 facility and achieve the following broad goals: (1) investigate soil net CO2 exchange-temperature relationship at the community level; (2) compare soil net CO2 exchange at the community level to the traditional sample point estimates of CO2 efflux scaled up to the community level; (3) evaluate the usefulness of a facility such as Biosphere 2 for conducting community level experiments for studying response to a climatic perturbation under controlled environmental conditions. A 550 m3 volume of soil with 282, 15 cm tree stumps was enclosed at the Biosphere 2 Center and warmed from 10 to 25°C over a period of 34 days. Net CO2 exchange from this community was measured at various points on the soil surface with 78.5 cm2 chambers and for the whole community using each of the three bays at Biosphere 2 Center as a closed system. Soil CO2 efflux rates obtained by point measurements showed tremendous variability from location to location. At the community level and with point measurements, net CO2 exchange increased exponentially with increasing soil temperatures. Q10 values from both the point and community level measurements ranged from 1.7 to 2.5. Scaling of point measurements by soil surface area and time overestimated community rates by 36% revealing some of the limitations of point measurements. This experiment demonstrates how Biosphere 2 facility could be used to study behavior of individual components and measure responses at the community level and test our capacity to scale point in time and space measures of community processes to the community level.

Original languageEnglish (US)
Pages (from-to)311-327
Number of pages17
JournalForest Ecology and Management
Volume178
Issue number3
StatePublished - Jun 17 2003

Fingerprint

Biosphere 2
soil temperature
carbon dioxide
soil
soil surface
tree stump
community response
closed loop systems
stumps
surface area
experiment
environmental conditions
perturbation
space and time
testing
biosphere
environmental factors

Keywords

  • Community level soil respiration
  • Environment-controlled facility
  • Scaling
  • Soil warming

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Forestry
  • Ecology

Cite this

Murthy, R., Griffin, K. L., Zarnoch, S. J., Dougherty, P. M., Watson, B., Van Haren, J. L. M., ... Mahato, T. (2003). Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures. Forest Ecology and Management, 178(3), 311-327.

Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures. / Murthy, Ramesh; Griffin, Kevin L.; Zarnoch, Stanley J.; Dougherty, Phillip M.; Watson, Barbara; Van Haren, Joost L M; Patterson, Randy L.; Mahato, Tilak.

In: Forest Ecology and Management, Vol. 178, No. 3, 17.06.2003, p. 311-327.

Research output: Contribution to journalArticle

Murthy, R, Griffin, KL, Zarnoch, SJ, Dougherty, PM, Watson, B, Van Haren, JLM, Patterson, RL & Mahato, T 2003, 'Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures', Forest Ecology and Management, vol. 178, no. 3, pp. 311-327.
Murthy R, Griffin KL, Zarnoch SJ, Dougherty PM, Watson B, Van Haren JLM et al. Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures. Forest Ecology and Management. 2003 Jun 17;178(3):311-327.
Murthy, Ramesh ; Griffin, Kevin L. ; Zarnoch, Stanley J. ; Dougherty, Phillip M. ; Watson, Barbara ; Van Haren, Joost L M ; Patterson, Randy L. ; Mahato, Tilak. / Carbon dioxide efflux from a 550 m3 soil across a range of soil temperatures. In: Forest Ecology and Management. 2003 ; Vol. 178, No. 3. pp. 311-327.
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