Document Type

Article

Publication Date

1-20-1983

Publication Title

Marine Ecology Progress Series

ISSN

0171-8630

Volume

10

First Page

251

Last Page

256

Abstract

Preliminary studies with an ampule analyzing unit and infrared (IR) detector showed that procedures for standardization and determination of total carbon dioxide (ΣCO2), while often precise, lacked the accuracy required to estimate the net productivity and respiration of aquatic ecosystems during studies in which sampling over diel cycles was used. Scaling down sample and standard volumes to the µl range and the use of a commercial sodium carbonate standard without dilution before and after replicate sample injections gave accurate results as shown by comparison with indirect (pH-alkalinity) ΣCO2, determinations with a standard error of ±3 µmoles in the laboratory and ±6 µmoles at sea for 8 to 10 replicates. This was sufficient to detect a diurnal consumption and nocturnal production of CO2, which were inversely correlated with O2 variation in a salt marsh, an estuarine mesocosm, and the Caribbean Sea.

Comments

©1982-1983 Inter-Research

Additional Comments

NSF grant #s: OCE-7681779, OCE-7826388, OCE-8121881

Peer Reviewed

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