Diel variation of benthic respiration in a coral reef sediment (Reunion Island, Indian Ocean) - Université de La Réunion Access content directly
Journal Articles Estuarine, Coastal and Shelf Science Year : 2008

Diel variation of benthic respiration in a coral reef sediment (Reunion Island, Indian Ocean)

Abstract

Oxygen and total dissolved inorganic carbon (DIC) fluxes at the water–sediment interface were measured using benthic chambers to assess the short-term variations of community respiration (CR) in the back reef sediments of Reunion Island (Indian Ocean). Benthic CR had a daily cycle of minimal (6:00 AM) and maximal values (6:00 PM), showing increases of oxygen and DIC fluxes of 2.8- and 3.8-fold, respectively. Average CR values were observed at midday and midnight. The evolution of fluxes was positively related to oxygen concentration in ambient water, but not to temperature changes. In the study area, high daytime primary production augments the amount of energy available for community metabolism and increases benthic respiration. The benthic communities are therefore subjected to short-term variable environmental conditions with oxygen supersaturation during the day, and moderately hypoxic conditions at the end of the night.

Dates and versions

hal-01368985 , version 1 (20-09-2016)

Identifiers

Cite

Jacques Clavier, Laurent Chauvaud, Pascale Cuet, Clémentine Esbelin, Frouin Patrick, et al.. Diel variation of benthic respiration in a coral reef sediment (Reunion Island, Indian Ocean). Estuarine, Coastal and Shelf Science, 2008, 76 (2), ⟨10.1016/j.ecss.2007.07.028⟩. ⟨hal-01368985⟩
343 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More