La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Surface Water Metabolism Potential in a Tropical Estuary, Hilo Bay, Hawai'i, USA, During Storm and Non-storm Conditions
Auteurs :	Lucas H. Mead, Auteur ; Tracy N. Wiegner, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (33(5) SEP 2010)
Article en page(s) :	1099-1112
Résumé :	Surface water gross primary production potential (pGPP), respiration (RESP), metabolism potential (pMET), and CO(2) fluxes in Hilo Bay, Hawai'i, USA, were examined along two river plumes during storm (high-flow) and non-storm (low-flow) conditions. Significant differences in pGPP, RESP, and pMET were found between low- and high-flow conditions, with lowest rates of all processes occurring during high-flow conditions. CO(2) fluxes were influenced by metabolic processes at all but one site, with the bay's surface waters being autotrophic and a sink for atmospheric CO(2) during low-flow conditions and less autotrophic and a source of atmospheric CO(2) during high-flow conditions. Significant differences in pMET were found between the two river plumes during low-flow conditions at spatial scales of 1.5 km; however, no differences between river plumes were found during high-flow conditions. Our study suggests that an increase in storms associated with global climate change could impact surface water metabolic dynamics of tropical estuaries.

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