Temperature Dependence of Oxygen Dynamics and Community Metabolism in a Shallow Mediterranean Macroalgal Meadow (Caulerpa prolifera)

Raquel Vaquer-Sunyer; Carlos M. Duarte; Gabriel Jordà; Sergio Ruiz-Halpern

doi:10.1007/s12237-012-9514-y

Temperature Dependence of Oxygen Dynamics and Community Metabolism in a Shallow Mediterranean Macroalgal Meadow (Caulerpa prolifera)

Raquel Vaquer-Sunyer^*, Carlos M. Duarte, Gabriel Jordà, Sergio Ruiz-Halpern

^*Corresponding author for this work

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

30 Scopus citations

Abstract

Hypoxia is emerging as a major threat to marine coastal biota. Predicting its occurrence and elucidating the driving factors are essential to set successful management targets to avoid its occurrence. This study aims to elucidate the effects of warming on the likelihood of hypoxia. High-frequency dissolved oxygen measurements have been used to estimate gross primary production (GPP), net ecosystem production (NEP) and community respiration (CR) in a shallow macroalgae (Caulerpa prolifera) ecosystem in a highly human-influenced closed Mediterranean bay. Daily averaged GPP and CR ranged from 0 to 1,240. 9 and 51. 4 to 1,297. 3 mmol O ₂ m ^-2 day ^-1, respectively. The higher GPP and CR were calculated for the same day, when daily averaged water temperature was 28. 3 °C, and resulted in a negative NEP of -56. 4 mmol O ₂ m ^-2 day ^-1. The ecosystem was net heterotrophic during the studied period, probably subsidized by allochthonous organic inputs from ground waters and from the surrounding town and boating activity. Oxygen dynamics and metabolic rates strongly depend on water temperature, with lower oxygen content at higher temperatures. The probability of hypoxic conditions increased at a rate of 0. 39 % °C ^-1 (±0. 14 % °C ^-1). Global warming will increase the likelihood of hypoxia in the bay studied, as well as in other semi-enclosed bays.

Original language	English (US)
Pages (from-to)	1182-1192
Number of pages	11
Journal	Estuaries and Coasts
Volume	35
Issue number	5
DOIs	https://doi.org/10.1007/s12237-012-9514-y
State	Published - Sep 2012
Externally published	Yes

Bibliographical note

Funding Information:
Acknowledgments This research is a contribution to the “Water bodies in Europe: Integrative Systems to assess Ecological Status and Recovery (WISER)” project, funded by FP7 (contract 226273); the project MEDEICG, funded by the Spanish Ministry of Science and Innovation (number CTM2009-07013) and the project MARINERA, funded by the Spanish Government (Ref. CTM-2008-04183-E/MAR). R. Vaquer-Sunyer was funded by the WISER project. G. Jordà acknowledges a JAE-DOC contract funded by the Spanish research council (CSIC). We thank R. Martínez, L. Royo, M. Noguera and A. Steckbauer for help on sampling and J.C. Alonso for nutrient analysis. We want to thank J.J. Coloso for his generosity in sharing his MATLAB program with us.

Keywords

Benthic metabolism
Eutrophication
Global change
Hypoxia
Warming

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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10.1007/s12237-012-9514-y

Cite this

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title = "Temperature Dependence of Oxygen Dynamics and Community Metabolism in a Shallow Mediterranean Macroalgal Meadow (Caulerpa prolifera)",

abstract = "Hypoxia is emerging as a major threat to marine coastal biota. Predicting its occurrence and elucidating the driving factors are essential to set successful management targets to avoid its occurrence. This study aims to elucidate the effects of warming on the likelihood of hypoxia. High-frequency dissolved oxygen measurements have been used to estimate gross primary production (GPP), net ecosystem production (NEP) and community respiration (CR) in a shallow macroalgae (Caulerpa prolifera) ecosystem in a highly human-influenced closed Mediterranean bay. Daily averaged GPP and CR ranged from 0 to 1,240. 9 and 51. 4 to 1,297. 3 mmol O 2 m -2 day -1, respectively. The higher GPP and CR were calculated for the same day, when daily averaged water temperature was 28. 3 °C, and resulted in a negative NEP of -56. 4 mmol O 2 m -2 day -1. The ecosystem was net heterotrophic during the studied period, probably subsidized by allochthonous organic inputs from ground waters and from the surrounding town and boating activity. Oxygen dynamics and metabolic rates strongly depend on water temperature, with lower oxygen content at higher temperatures. The probability of hypoxic conditions increased at a rate of 0. 39 % °C -1 (±0. 14 % °C -1). Global warming will increase the likelihood of hypoxia in the bay studied, as well as in other semi-enclosed bays.",

keywords = "Benthic metabolism, Eutrophication, Global change, Hypoxia, Warming",

author = "Raquel Vaquer-Sunyer and Duarte, {Carlos M.} and Gabriel Jord{\`a} and Sergio Ruiz-Halpern",

note = "Funding Information: Acknowledgments This research is a contribution to the “Water bodies in Europe: Integrative Systems to assess Ecological Status and Recovery (WISER)” project, funded by FP7 (contract 226273); the project MEDEICG, funded by the Spanish Ministry of Science and Innovation (number CTM2009-07013) and the project MARINERA, funded by the Spanish Government (Ref. CTM-2008-04183-E/MAR). R. Vaquer-Sunyer was funded by the WISER project. G. Jord{\`a} acknowledges a JAE-DOC contract funded by the Spanish research council (CSIC). We thank R. Mart{\'i}nez, L. Royo, M. Noguera and A. Steckbauer for help on sampling and J.C. Alonso for nutrient analysis. We want to thank J.J. Coloso for his generosity in sharing his MATLAB program with us.",

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AU - Duarte, Carlos M.

AU - Jordà, Gabriel

AU - Ruiz-Halpern, Sergio

N1 - Funding Information: Acknowledgments This research is a contribution to the “Water bodies in Europe: Integrative Systems to assess Ecological Status and Recovery (WISER)” project, funded by FP7 (contract 226273); the project MEDEICG, funded by the Spanish Ministry of Science and Innovation (number CTM2009-07013) and the project MARINERA, funded by the Spanish Government (Ref. CTM-2008-04183-E/MAR). R. Vaquer-Sunyer was funded by the WISER project. G. Jordà acknowledges a JAE-DOC contract funded by the Spanish research council (CSIC). We thank R. Martínez, L. Royo, M. Noguera and A. Steckbauer for help on sampling and J.C. Alonso for nutrient analysis. We want to thank J.J. Coloso for his generosity in sharing his MATLAB program with us.

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N2 - Hypoxia is emerging as a major threat to marine coastal biota. Predicting its occurrence and elucidating the driving factors are essential to set successful management targets to avoid its occurrence. This study aims to elucidate the effects of warming on the likelihood of hypoxia. High-frequency dissolved oxygen measurements have been used to estimate gross primary production (GPP), net ecosystem production (NEP) and community respiration (CR) in a shallow macroalgae (Caulerpa prolifera) ecosystem in a highly human-influenced closed Mediterranean bay. Daily averaged GPP and CR ranged from 0 to 1,240. 9 and 51. 4 to 1,297. 3 mmol O 2 m -2 day -1, respectively. The higher GPP and CR were calculated for the same day, when daily averaged water temperature was 28. 3 °C, and resulted in a negative NEP of -56. 4 mmol O 2 m -2 day -1. The ecosystem was net heterotrophic during the studied period, probably subsidized by allochthonous organic inputs from ground waters and from the surrounding town and boating activity. Oxygen dynamics and metabolic rates strongly depend on water temperature, with lower oxygen content at higher temperatures. The probability of hypoxic conditions increased at a rate of 0. 39 % °C -1 (±0. 14 % °C -1). Global warming will increase the likelihood of hypoxia in the bay studied, as well as in other semi-enclosed bays.

AB - Hypoxia is emerging as a major threat to marine coastal biota. Predicting its occurrence and elucidating the driving factors are essential to set successful management targets to avoid its occurrence. This study aims to elucidate the effects of warming on the likelihood of hypoxia. High-frequency dissolved oxygen measurements have been used to estimate gross primary production (GPP), net ecosystem production (NEP) and community respiration (CR) in a shallow macroalgae (Caulerpa prolifera) ecosystem in a highly human-influenced closed Mediterranean bay. Daily averaged GPP and CR ranged from 0 to 1,240. 9 and 51. 4 to 1,297. 3 mmol O 2 m -2 day -1, respectively. The higher GPP and CR were calculated for the same day, when daily averaged water temperature was 28. 3 °C, and resulted in a negative NEP of -56. 4 mmol O 2 m -2 day -1. The ecosystem was net heterotrophic during the studied period, probably subsidized by allochthonous organic inputs from ground waters and from the surrounding town and boating activity. Oxygen dynamics and metabolic rates strongly depend on water temperature, with lower oxygen content at higher temperatures. The probability of hypoxic conditions increased at a rate of 0. 39 % °C -1 (±0. 14 % °C -1). Global warming will increase the likelihood of hypoxia in the bay studied, as well as in other semi-enclosed bays.

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KW - Warming

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SN - 1559-2723

VL - 35

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JO - Estuaries and Coasts

JF - Estuaries and Coasts

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ER -

Temperature Dependence of Oxygen Dynamics and Community Metabolism in a Shallow Mediterranean Macroalgal Meadow (Caulerpa prolifera)

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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