The CO2 balance of unproductive aquatic ecosystems

Carlos Duarte*, Susana Agusti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

285 Scopus citations

Abstract

Community respiration (R) rates are scared as the two-thirds power of the gross primary production (P) rates of aquatic ecosystems, indicating that the rote of aquatic biota as carbon dioxide sources or sinks depends on its productivity. Unproductive aquatic ecosystems support a disproportionately higher respiration rate than that of productive aquatic ecosystems, tend to be heterotrophic (R > P), and act as carbon dioxide sources. The average P required for aquatic ecosystems to become autotrophic (P > R) is over an order of magnitude greater for marshes than for the open sea. Although four- fifths of the upper ocean is expected to be net heterotrophic, this carbon demand can be balanced by the excess production over the remaining one-fifth of the ocean.

Original languageEnglish (US)
Pages (from-to)234-236
Number of pages3
JournalScience
Volume281
Issue number5374
DOIs
StatePublished - Jul 10 1998

ASJC Scopus subject areas

  • General

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