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Zooplankton drive diurnal changes in oxygen concentration at Tisler cold-water coral reef

Citation

Guihen, D and White, M and Lundalv, T, Zooplankton drive diurnal changes in oxygen concentration at Tisler cold-water coral reef, Coral Reefs, 37, (4) pp. 1013-1025. ISSN 0722-4028 (2018) [Refereed Article]

Copyright Statement

copyright Springer-Verlag GmbH Germany, part of Springer Nature 2018

DOI: doi:10.1007/s00338-018-1711-0

Abstract

Tisler Reef is a Norwegian cold-water coral reef in the Northeastern Skagerrak, which lies at an average depth of 120 m, is constructed principally of the scleractinian coral Lophelia pertusa and hosts a dynamic and diverse ecosystem. The availability of oxygen within Tisler Reef, recorded between 2006 and 2008, showed a decline during the summer months, caused by both the isolation of the reef from the atmosphere under conditions of seasonal stratification, and the enhanced respiration in the water column during the seasonal zooplankton proliferations. Concentrations of dissolved oxygen were replenished from high-current flows advecting water from off the reef. Low current flow conditions (< 0.05 m s−1) coincided with a short-term reduction in oxygen, the extent of which varied seasonally and were observed to be greatest during July and August, coinciding with the summer Calanus proliferation in the Skagerrak. Normalized acoustic backscatter amplitude during the summer months showed a strong signal of zooplankton diurnal vertical migration, coinciding with the lowest oxygen concentrations at the reef observed during, and lagging slightly after, the deep phase of the zooplankton vertical migration. This effect was most obvious during low-flow conditions; highlighting the importance of zooplankton and associated activity as a consumer of oxygen at the reef.

Item Details

Item Type:Refereed Article
Keywords:coral, seasonality, zooplankton, physical control, oxygen
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Biological Oceanography
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
UTAS Author:Guihen, D (Dr Damien Guihen)
ID Code:128226
Year Published:2018
Web of Science® Times Cited:11
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2018-09-10
Last Modified:2018-12-07
Downloads:0

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