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Diel Aquatic CO2 System Dynamics of a Bermudian Mangrove Environment

Diel Aquatic CO2 System Dynamics of a Bermudian Mangrove Environment
Diel Aquatic CO2 System Dynamics of a Bermudian Mangrove Environment
Mangrove ecosystems play an important, but understudied, role in the cycling of carbon in tropical and subtropical coastal ocean environments. In the present study, we examined the diel dynamics of seawater carbon dioxide (CO2) and dissolved oxygen (DO) for a mangrove-dominated marine ecosystem (Mangrove Bay) and an adjacent intracoastal waterway (Ferry Reach) on the island of Bermuda. Spatial and temporal trends in seawater carbonate chemistry and associated variables were assessed from direct measurements of dissolved inorganic carbon, total alkalinity, dissolved oxygen (DO), temperature, and salinity. Diel pCO2 variability was interpolated across hourly wind speed measurements to determine variability in daily CO2 fluxes for the month of October 2007 in Bermuda. From these observations, we estimated rates of net sea to air CO2 exchange for these two coastal ecosystems at 59.8 ± 17.3 in Mangrove Bay and 5.5 ± 1.3 mmol m?2 d?1 in Ferry Reach. These results highlight the potential for large differences in carbonate system functioning and sea-air CO2 flux in adjacent coastal environments. In addition, observation of large diel variability in CO2 system parameters (e.g., mean pCO2: 390–2,841 ?atm; mean pHT: 8.05–7.34) underscores the need for careful consideration of diel cycles in long-term sampling regimes and flux estimates.
Mangrove, CO2, Diel, Gas flux, Coastal ocean
1380-6165
841-859
Zablocki, John A.
b60cd377-c9df-47fa-9507-0d82f547d5ca
Andersson, Andreas J.
b07d71e9-2654-40ba-9c69-0775557bf7de
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Zablocki, John A.
b60cd377-c9df-47fa-9507-0d82f547d5ca
Andersson, Andreas J.
b07d71e9-2654-40ba-9c69-0775557bf7de
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57

Zablocki, John A., Andersson, Andreas J. and Bates, Nicholas R. (2011) Diel Aquatic CO2 System Dynamics of a Bermudian Mangrove Environment. Aquatic Geochemistry, 17 (6), 841-859. (doi:10.1007/s10498-011-9142-3).

Record type: Article

Abstract

Mangrove ecosystems play an important, but understudied, role in the cycling of carbon in tropical and subtropical coastal ocean environments. In the present study, we examined the diel dynamics of seawater carbon dioxide (CO2) and dissolved oxygen (DO) for a mangrove-dominated marine ecosystem (Mangrove Bay) and an adjacent intracoastal waterway (Ferry Reach) on the island of Bermuda. Spatial and temporal trends in seawater carbonate chemistry and associated variables were assessed from direct measurements of dissolved inorganic carbon, total alkalinity, dissolved oxygen (DO), temperature, and salinity. Diel pCO2 variability was interpolated across hourly wind speed measurements to determine variability in daily CO2 fluxes for the month of October 2007 in Bermuda. From these observations, we estimated rates of net sea to air CO2 exchange for these two coastal ecosystems at 59.8 ± 17.3 in Mangrove Bay and 5.5 ± 1.3 mmol m?2 d?1 in Ferry Reach. These results highlight the potential for large differences in carbonate system functioning and sea-air CO2 flux in adjacent coastal environments. In addition, observation of large diel variability in CO2 system parameters (e.g., mean pCO2: 390–2,841 ?atm; mean pHT: 8.05–7.34) underscores the need for careful consideration of diel cycles in long-term sampling regimes and flux estimates.

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More information

Published date: November 2011
Keywords: Mangrove, CO2, Diel, Gas flux, Coastal ocean
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 357318
URI: http://eprints.soton.ac.uk/id/eprint/357318
ISSN: 1380-6165
PURE UUID: 6ee4dd24-5d9a-4c5e-b886-d761e4593259

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Date deposited: 24 Sep 2013 10:35
Last modified: 14 Mar 2024 14:57

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Author: John A. Zablocki
Author: Andreas J. Andersson

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