Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark): Evaluation of methods

Frédéric Gazeau; Alberto Vieira Borges; Cristina Barrón; Carlos M. Duarte; Niels Iversen; Jack J. Middelburg; Bruno Delille; Marie Dominique Pizay; Michel Frankignoulle; Jean Pierre Gattuso

doi:10.3354/meps301023

Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark): Evaluation of methods

Frédéric Gazeau^*, Alberto Vieira Borges, Cristina Barrón, Carlos M. Duarte, Niels Iversen, Jack J. Middelburg, Bruno Delille, Marie Dominique Pizay, Michel Frankignoulle, Jean Pierre Gattuso

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

The metabolic status, the difference between organic matter production and consumption of an estuary (Randers Fjord, Denmark) has been assessed based on 2 field cruises in April and August 2001 and a number of approaches: (1) the oxygen (O₂) incubation method, (2) dissolved inorganic carbon (DIC) budgets, (3) the response surface difference (RSD) method based on diel O ₂ changes and (4) land-ocean interaction in the coastal zone (LOICZ) budgets based on dissolved inorganic phosphorus (DIP). Although each method has its own associated limitations and uncertainties, the above approaches converged most of the time in consistent metabolic estimates, both in sign and magnitude, and revealed that this system was near metabolic balance in spring (net ecosystem production: NEP ∼ 0) and net heterotrophic in summer (NEP ∼ -50 mmol C m^-2 d^-1). In this shallow estuary (mean depth = 1.6 m), the benthic compartment was very active and represented 70 and 30 % of the total gross primary production in April and August, respectively. NEP rates measured during this study are in the range of previously reported rates in estuaries.

Original language	English (US)
Pages (from-to)	23-41
Number of pages	19
Journal	MARINE ECOLOGY PROGRESS SERIES
Volume	301
DOIs	https://doi.org/10.3354/meps301023
State	Published - Oct 11 2005
Externally published	Yes

Keywords

Carbon dynamics
Ecosystem metabolism
Estuaries
Oxygen
Primary production
Randers Fjord
Respiration

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Aquatic Science
Ecology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3354/meps301023

Cite this

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title = "Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark): Evaluation of methods",

abstract = "The metabolic status, the difference between organic matter production and consumption of an estuary (Randers Fjord, Denmark) has been assessed based on 2 field cruises in April and August 2001 and a number of approaches: (1) the oxygen (O2) incubation method, (2) dissolved inorganic carbon (DIC) budgets, (3) the response surface difference (RSD) method based on diel O 2 changes and (4) land-ocean interaction in the coastal zone (LOICZ) budgets based on dissolved inorganic phosphorus (DIP). Although each method has its own associated limitations and uncertainties, the above approaches converged most of the time in consistent metabolic estimates, both in sign and magnitude, and revealed that this system was near metabolic balance in spring (net ecosystem production: NEP ∼ 0) and net heterotrophic in summer (NEP ∼ -50 mmol C m-2 d-1). In this shallow estuary (mean depth = 1.6 m), the benthic compartment was very active and represented 70 and 30 % of the total gross primary production in April and August, respectively. NEP rates measured during this study are in the range of previously reported rates in estuaries.",

keywords = "Carbon dynamics, Ecosystem metabolism, Estuaries, Oxygen, Primary production, Randers Fjord, Respiration",

author = "Fr{\'e}d{\'e}ric Gazeau and Borges, {Alberto Vieira} and Cristina Barr{\'o}n and Duarte, {Carlos M.} and Niels Iversen and Middelburg, {Jack J.} and Bruno Delille and Pizay, {Marie Dominique} and Michel Frankignoulle and Gattuso, {Jean Pierre}",

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language = "English (US)",

volume = "301",

pages = "23--41",

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TY - JOUR

T1 - Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark)

T2 - Evaluation of methods

AU - Gazeau, Frédéric

AU - Borges, Alberto Vieira

AU - Barrón, Cristina

AU - Duarte, Carlos M.

AU - Iversen, Niels

AU - Middelburg, Jack J.

AU - Delille, Bruno

AU - Pizay, Marie Dominique

AU - Frankignoulle, Michel

AU - Gattuso, Jean Pierre

PY - 2005/10/11

Y1 - 2005/10/11

N2 - The metabolic status, the difference between organic matter production and consumption of an estuary (Randers Fjord, Denmark) has been assessed based on 2 field cruises in April and August 2001 and a number of approaches: (1) the oxygen (O2) incubation method, (2) dissolved inorganic carbon (DIC) budgets, (3) the response surface difference (RSD) method based on diel O 2 changes and (4) land-ocean interaction in the coastal zone (LOICZ) budgets based on dissolved inorganic phosphorus (DIP). Although each method has its own associated limitations and uncertainties, the above approaches converged most of the time in consistent metabolic estimates, both in sign and magnitude, and revealed that this system was near metabolic balance in spring (net ecosystem production: NEP ∼ 0) and net heterotrophic in summer (NEP ∼ -50 mmol C m-2 d-1). In this shallow estuary (mean depth = 1.6 m), the benthic compartment was very active and represented 70 and 30 % of the total gross primary production in April and August, respectively. NEP rates measured during this study are in the range of previously reported rates in estuaries.

AB - The metabolic status, the difference between organic matter production and consumption of an estuary (Randers Fjord, Denmark) has been assessed based on 2 field cruises in April and August 2001 and a number of approaches: (1) the oxygen (O2) incubation method, (2) dissolved inorganic carbon (DIC) budgets, (3) the response surface difference (RSD) method based on diel O 2 changes and (4) land-ocean interaction in the coastal zone (LOICZ) budgets based on dissolved inorganic phosphorus (DIP). Although each method has its own associated limitations and uncertainties, the above approaches converged most of the time in consistent metabolic estimates, both in sign and magnitude, and revealed that this system was near metabolic balance in spring (net ecosystem production: NEP ∼ 0) and net heterotrophic in summer (NEP ∼ -50 mmol C m-2 d-1). In this shallow estuary (mean depth = 1.6 m), the benthic compartment was very active and represented 70 and 30 % of the total gross primary production in April and August, respectively. NEP rates measured during this study are in the range of previously reported rates in estuaries.

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KW - Ecosystem metabolism

KW - Estuaries

KW - Oxygen

KW - Primary production

KW - Randers Fjord

KW - Respiration

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Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark): Evaluation of methods

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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