Seasonal changes of pCO 2 over a subantarctic Macrocystis kelp bed

Delille, Bruno; Delille, Daniel; Fiala, Michel; Prévost, Clément; Frankignoulle, Michel

doi:10.1007/s003000000142

Cited by 56 publications

(46 citation statements)

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“…The overall seasonal changes in the SST, pCO 2 and DIC n outside the kelp beds in BB and MB are consistent with those reported in the Port aux Français station based on weekly monitoring carried out the same year by Delille et al (2000) (Fig. 2).…”

Section: Seasonal Variationssupporting

confidence: 88%

“…In the Bay of Palma (Spain), strong decreases in pCO 2 over Posidonia meadows have been reported due to the meadows' higher primary productivity compared to the surrounding oligotrophic waters (Gazeau et al, 2005). In the same area, Barrón et al (2006) highlighted the strong influence of calcification by epiphythes and calcium carbonate (CaCO 3 ) dissolution on CO 2 dynamics in Posidonia meadows, which is in agreement with observations of other seagrass ecosystems (Morse et al, 1987;Ku et al, 1999;Delille et al, 2000;Burdige and Zimmerman, 2002;Yates and Halley, 2003;Yates and Halley, 2006). On the whole, Posidonia oceanica seagrass meadows appear to act as a sink for atmospheric CO 2 .…”

Section: Introductionsupporting

confidence: 77%

“…From a strictly oceanographic point of view, this archipelago is situated either in the Polar Frontal Zone (Sub-Antarctica) or Permanently Open Ocean Zone (Antarctica) depending on the position of the Polar Front with regards to the archipelago (e.g. Delille et al 2000). A substantial portion of the coastlines of the archipelago is occupied by Macrocystis pyrifera kelp beds.…”

Section: Methodsmentioning

confidence: 99%

“…In November and December, the pCO 2 increases outside the kelp beds, while remaining constant inside the bed due to primary production by macroalgae and enhanced planktonic primary production (Delille et al, 2000).…”

Section: Seasonal Variationsmentioning

confidence: 99%

“…On the whole, Posidonia oceanica seagrass meadows appear to act as a sink for atmospheric CO 2 . In the waters surrounding the Kerguelen Archipelago, it has been previously reported that the DIC and pCO 2 of the waters above Macrocystis kelp beds are strongly influenced by the biological activity of the kelp, which, in turn, leads to a potential sink for atmospheric CO 2 (Delille et al, 1997;Delille et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Delille

Borges

Delille

2009

Estuarine, Coastal and Shelf Science

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The partial pressure of CO 2 (pCO 2 ) and dissolved inorganic carbon (DIC) were monitored in shallow coastal waters located inside and outside giant kelp beds (Macrocystis pyrifera) located in the Kerguelen Archipelago (Southern Ocean).Photosynthesis and respiration by microplankton and kelp lead to marked pCO 2 and DIC diel cycles. Daily variations of pCO 2 and DIC are significant in the spring and summer, but absent in the winter, reflecting the seasonal cycle of biological activity in the kelp beds. If the kelp beds seem to favour the onset of phytoplankton blooms, most of the primary production inside the kelp beds is due to the kelp itself. The primary production of Macrocystis kelp beds in the Sub-Antarctic high-nutrient, lowchlorophyll (HNLC) waters off the Kerguelen Archipelago is elevated and closely linked to light availability. This production is significant from October to March and reaches its climax in December at the solar radiation maximum.

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Section: Seasonal Variationssupporting

confidence: 88%

Section: Introductionsupporting

confidence: 77%

Section: Methodsmentioning

confidence: 99%

Section: Seasonal Variationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Delille

Borges

Delille

2009

Estuarine, Coastal and Shelf Science

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Temporal variations in air‐sea CO₂ exchange near large kelp beds near San Diego, California

Ikawa

Oechel

2015

JGR Oceans

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This study presents nearly continuous air-sea CO 2 flux for 7 years using the eddy covariance method for nearshore water near San Diego, California, as well as identifying environmental processes that appear to control temporal variations in air-sea CO 2 flux at different time scales using time series decomposition. Monthly variations in CO 2 uptake are shown to be positively influenced by photosynthetically active photon flux density (PPFD) and negatively related to wind speeds. In contrast to the monthly scale, wind speeds often influenced CO 2 uptake positively on an hourly scale. Interannual variations in CO 2 flux were not correlated with any independent variables, but did reflect surface area of the adjacent kelp bed in the following year. Different environmental influences on CO 2 flux at different temporal scales suggest the importance of long-term flux monitoring for accurately identifying important environmental processes for the coastal carbon cycle. Overall, the study area was a strong CO 2 sink into the sea (CO 2 flux of ca. 2260 g C m 22 yr 21 ). If all coastal areas inhabited by macrophytes had a similar CO 2 uptake rate, the net CO 2 uptake from these areas alone would roughly equal the net CO 2 sink estimated for the entire global coastal ocean to date. A similar-strength CO 2 flux, ranging between 20.09 and 20.01 g C m 22 h 21 , was also observed over another kelp bed from a pilot study of boat-based eddy covariance measurements.

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Seaweed Responses to Ocean Acidification

Roleda

Hurd

2012

Ecological Studies

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Seasonal changes of pCO 2 over a subantarctic Macrocystis kelp bed

Cited by 56 publications

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Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Temporal variations in air‐sea CO₂ exchange near large kelp beds near San Diego, California

Seaweed Responses to Ocean Acidification

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Seasonal changes of pCO 2 over a subantarctic Macrocystis kelp bed

Cited by 56 publications

References 0 publications

Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Influence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area

Temporal variations in air‐sea CO2 exchange near large kelp beds near San Diego, California

Seaweed Responses to Ocean Acidification

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Temporal variations in air‐sea CO₂ exchange near large kelp beds near San Diego, California