Annual budget of benthic production in Mont Saint-Michel Bay considering cloudiness, microphytobenthos migration, and variability of respiration rates with tidal conditions

Migné, Aline; Spilmont, Nicolas; Boucher, Guy; Denis, Lionel; Hubas, Cédric; Janquin, Marie-Andrée; Rauch, Mathieu; Davoult, Dominique

doi:10.1016/j.csr.2009.09.004

Cited by 39 publications

(24 citation statements)

References 28 publications

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“…This main result confirms the observation made only once for a Zostera noltii community on the northwest coast of Mauritania (Clavier et al 2011). More generally, a higher CR rate during immersion than emersion has been observed in previous studies of temperate mudflats (Gribsholt & Kristensen 2003, Cook et al 2004, Migné et al 2009). In soft sediment, CR can be mainly ascribed to heterotrophic organisms (del Giorgio & Williams 2005), and higher CR during immersion might be explained by enhanced bacterial and infaunal activity.…”

Section: Discussionsupporting

confidence: 80%

Community-level carbon flux variability over a tidal cycle in Zostera marina and Z. noltii beds

Ouisse¹,

Migné²,

Davoult³

2011

Mar. Ecol. Prog. Ser.

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Abiotic parameters such as light, temperature, nutrient availability and inorganic carbon source are known to vary widely between immersion and emersion. We measured gross community productivity (GCP) and community respiration (CR) over spring tidal cycles in intertidal Zostera marina and Z. noltii communities. CO 2 fluxes during emersion and inorganic carbon fluxes during immersion were assessed using closed benthic chambers. GCP and CR rates were significantly higher during immersion than during emersion for both communities. In July, GCP rates were 3-and 5-fold higher and CR rates were 2.5-and 9-fold higher during immersion for the Z. marina and Z. noltii communities, respectively. This trend was confirmed in the Z. noltii community at different periods of the year (February, April and November). Neither photoinhibition nor desiccation was measured during emersion, but shading might have greatly limited the GCP rates. Higher CR during immersion could be explained by enhanced bacterial and infaunal activity.

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Section: Discussionsupporting

confidence: 80%

Community-level carbon flux variability over a tidal cycle in Zostera marina and Z. noltii beds

Ouisse¹,

Migné²,

Davoult³

2011

Mar. Ecol. Prog. Ser.

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“…Despite this study using an indirect method to estimate the carbon emissions from macrozoobenthos data and laboratory experiments, results were in the same order of magnitude than previous studies performed in the field. Our results were similar to studies using benthic chamber methods in intertidal sandy and muddy substrates (14-188 g C m − 2 yr − 2 ) (Migné et al, 2009) but much lower than respiration measured on maerl beds (407 g C m − 2 yr −2 ) (Martin et al, 2007). Moreover, the average carbon production of 14.3 mol C m −2 yr −1 calculated for the macrozoobenthic community A B Fig.…”

Section: Spatial and Temporal Natural Variations Of Carbon Fluxessupporting

confidence: 89%

Regional scale estimation of carbon fluxes from long-term monitoring of intertidal exposed rocky shore communities

Tagliarolo

Grall

Chauvaud

et al. 2015

Journal of Marine Systems

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“…Water turbidity is often thought to prevent photosynthesis by benthic microalgae during immersion (Cayocca et al 2008). Migné et al (2009) indicated that respiration rates were always higher under immersed than under emersed conditions. Our results demonstrate that turbid water during immersion increased CR more than GCP, which confirms that primary production of benthic microalgae on intertidal sandflats is restricted to emersion periods.…”

Section: Discussionmentioning

confidence: 99%

“…The respiration rate is often assumed to be constant throughout the day and night (Spilmont et al 2007, Migné et al 2009). However, our study demonstrated that this might not be the case, although the trend was based on limited data.…”

Section: Discussionmentioning

confidence: 99%

In situ production and respiration of the benthic community during emersion on subtropical intertidal sandflats

Lee¹,

Hsieh²,

Lin³

2011

Mar. Ecol. Prog. Ser.

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In situ benthic community production and respiration during emersion were measured monthly in the course of a 19 mo survey from June 2008 to December 2009 by monitoring CO(2) fluxes in benthic chambers on intertidal sandflats of a subtropical coastal wetland. Maximum gross community production (GCP(m)) and community respiration (CR) all exhibited higher values in summer and fall and lower values in spring and winter. GCP(m) and CR were positively correlated with air temperature. Temperature coefficients (Q(10)) showed that a rise of 10 degrees C would increase the GCP(m) and CR by factors of 3.72 and 4.80, respectively. GCP(m) was also positively correlated with sediment grain size and negatively correlated with the silt/clay content. CR exhibited a strong positive correlation with sediment chlorophyll a concentration and macrofaunal biomass. To provide an accurate annual budget of benthic production during emersion, corrections were considered for cloudiness and the time lag between emersion and maximum production due to vertical migration of benthic diatoms and variations in CR during nighttime emersion periods. Annual net community production (NCP) during emersion on sandflats was estimated to be 2.87 g C m(-2) yr(-1), indicating an autotrophic system. However, taking into account the variation in benthic metabolism during immersion, the subtropical intertidal sandflats shifted to a heterotrophic system, and annual NCP was calculated to be -91.47 g C m(-2) yr(-1)

show abstract

Annual budget of benthic production in Mont Saint-Michel Bay considering cloudiness, microphytobenthos migration, and variability of respiration rates with tidal conditions

Cited by 39 publications

References 28 publications

Community-level carbon flux variability over a tidal cycle in Zostera marina and Z. noltii beds

Community-level carbon flux variability over a tidal cycle in Zostera marina and Z. noltii beds

Regional scale estimation of carbon fluxes from long-term monitoring of intertidal exposed rocky shore communities

In situ production and respiration of the benthic community during emersion on subtropical intertidal sandflats

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