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EcoCELLs: tools for mesocosm scale measurements of gas exchange
Author(s) -
GRIFFIN K. L.,
ROSS P. D.,
SIMS D.A.,
LUO Y.,
SEEMANN J. R.,
FOX C. A.,
BALL J. T.
Publication year - 1996
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1996.tb00437.x
Subject(s) - mesocosm , trace gas , canopy , scale (ratio) , environmental science , calibration , ecosystem , volume (thermodynamics) , atmospheric sciences , mathematics , ecology , statistics , geography , physics , biology , cartography , quantum mechanics
We describe the use of a unique plant growth facility, which has as its centerpiece four ‘EcoCELLs’, or 5x7 m mesocosms designed as open‐flow, mass‐balance systems for the measurement of carbon, water and trace gas fluxes. This system is unique in that it was conceived specifically to bridge the gap between measurement scales during long‐term experiments examining the function and development of model ecosystems. There are several advantages to using EcoCELLs, including (i) the same theory of operation as leaf level gas exchange systems, but with continuous operation at a much larger scale: (ii) the ability to independently evaluate canopy‐level and ecosystem models; (iii) simultaneous manipulation of environmental factors and measurement of system‐level responses, and (iv) maximum access to, and manipulation of, a large rooting volume. In addition to discussing the theory, construction and relative merits of EcoCELLs, we describe the calibration and use of the EcoCELLs during a ‘proof of concept’ experiment. This experiment involved growing soybeans under two ambient CO 2 concentrations (−360 and 710μmol mol −1 . During this experiment, we asked ‘How accurate is the simplest model that can be used to scale from leaf‐level to canopy‐level responses?’ in order to illustrate the utility of the EcoCELLs in validating canopy‐scale models.