Estimating Seagrass Community Metabolism Using Benthic Chambers: The Effect of Incubation Time

Olivé, Irene; Silva, João; Costa, Monya M.; Santos, Rui

doi:10.1007/s12237-015-9973-z

Cited by 48 publications

(60 citation statements)

References 37 publications

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“…Community NEM rates of various seafloor habitats worldwide on (A) daily and (B) annual timescales. Daily NEM (a) mean ± SD (large open symbols) and number of observations ( n ) for datasets that compute the daily NEM from continuous diel measurements over 24 h (Maerl beds: Attard et al [], Martin et al [], and Martin et al []; bare sediments: Attard et al [], Attard et al [], Berg et al [], Chipman et al [], Hume et al [], Rheuban et al [], and Walpersdorf et al []; macroalgae: Gruber et al [] and this study; Seagrass: Ganguly et al [], Gruber et al [], Hume et al [], Lee et al [], Long et al [], Moriarty et al [], Olivé et al [], Pollard and Moriarty [], and Rheuban et al []). Annual data (B) are from studies that consider daily and seasonal NEM when computing the annual estimate (Maerl beds: Attard et al [] and Martin et al []; bare sediments: Attard et al [], Chipman et al [], and Rheuban et al []; Seagrass: Rheuban et al []; Macroalgae: this study).…”

Section: Discussionmentioning

confidence: 99%

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Attard

Rodil

Berg

et al. 2018

Limnology & Oceanography

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The important role of macroalgal canopies in the oceanic carbon (C) cycle is increasingly being recognized, but direct assessments of community productivity remain scarce. We conducted a seasonal study on a sublittoral Baltic Sea canopy of the brown alga Fucus vesiculosus, a prominent species in temperate and Arctic waters. We investigated community production on hourly, daily, and seasonal timescales. Aquatic eddy covariance (AEC) oxygen flux measurements integrated ~ 40 m2 of the seabed surface area and documented considerable oxygen production by the canopy year‐round. High net oxygen production rates of up to 35 ± 9 mmol m−2 h−1 were measured under peak irradiance of ~ 1200 μmol photosynthetically active radiation (PAR) m−2 s−1 in summer. However, high rates > 15 mmol m−2 h−1 were also measured in late winter (March) under low light intensities < 250 μmol PAR m−2 s−1 and water temperatures of ~ 1°C. In some cases, hourly AEC fluxes documented an apparent release of oxygen by the canopy under dark conditions, which may be due to gas storage dynamics within internal air spaces of F. vesiculosus. Daily net ecosystem metabolism (NEM) was positive (net autotrophic) in all but one of the five measurement campaigns (December). A simple regression model predicted a net autotrophic canopy for two‐thirds of the year, and annual canopy NEM amounted to 25 mol O2 m−2 yr−1, approximately six‐fold higher than net phytoplankton production. Canopy C export was ~ 0.3 kg C m−2 yr−1, comparable to canopy standing biomass in summer. Macroalgal canopies thus represent regions of intensified C assimilation and export in coastal waters.

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Section: Discussionmentioning

confidence: 99%

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Attard

Rodil

Berg

et al. 2018

Limnology & Oceanography

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Section: Discussionmentioning

confidence: 99%

“…The common use of incubation chambers in benthic metabolism studies has resulted in discussions regarding potential caveats such as incubation duration (e.g., Olivé et al ). We are aware of this potential caveat, which can result in the depletion of CO 2 and an increase in pH and O 2 within incubation chambers (Beer et al ; Olivé et al ). This can affect plant photosynthesis negatively through photorespiration when plants consume rather than produce O 2 , further contributing to the potential underestimation of net production values (Buapet et al ; Beer et al ; Olivé et al ).…”

Section: Discussionmentioning

confidence: 99%

Not all plants are the same: Exploring metabolism and nitrogen fluxes in a benthic community composed of different aquatic plant species

Gustafsson

Norkko

2016

Limnol. Oceanogr.

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Aquatic plants are important primary producers that affect the nutrient cycling in shallow coastal areas. How benthic communities composed of different plant species affect community metabolism and N fluxes is however, poorly understood, and in situ quantification is scarce. To study primary production and water‐sediment N fluxes in a benthic community consisting of various aquatic vascular plant species, diel field experiments were conducted in the Baltic Sea. Nine plant species were incubated in situ with bare sediments as control. The aim was to investigate diel community (including vascular plants, epiphytes, infauna, phytoplankton, and phytobenthos) and biomass‐specific metabolism and nitrogen fluxes among different plant species within a benthic community and to compare N fluxes between vegetated and bare sediments. The net production differed between different plant species, while the overall respiration was unaffected by the plant species present. There were no discernible differences in inorganic N fluxes between the different plant species within the benthic community and vegetated and bare sediments, whereas DON fluxes differed significantly. These results demonstrate that aquatic plant species have varying effects on ecosystem processes. Inherent differences between plant species add significant complexity to benthic functional diversity and highlight the important role that species‐rich vegetated habitats play for ecosystem functioning in shallow coastal areas.

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“…While many past experiments examining primary production by autotrophic communities have relied on laboratory experiments that do not incorporate natural fluctuations in abiotic conditions, recent studies have identified techniques that measure primary production in situ , thereby increasing the ecological realism of their experiments ( 44–46 ). For example, in situ chamber designs have been developed for estimating primary production by individual species ( 45, 46 ) and whole benthic communities ( 27, 46 ). In general, estimates of net ecosystem production ( NEP ) on the benthos can be made by measuring changes in dissolved oxygen within benthic chambers that are placed in situ over of macroalgae and invertebrate communities.…”

Section: Methodsmentioning

confidence: 99%

Marine deforestation leads to widespread loss of ecosystem function

Edwards

Konar

Kim

et al. 2019

Preprint

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Trophic interactions can result in changes to the abundance and distribution of habitat-forming species that dramatically reduce ecosystem health and functioning. Nowhere may this be as dramatic as in the coastal zone of the Aleutian Archipelago, where overgrazing by herbivorous sea urchins that began in the 1980s resulted in widespread deforestation of the region’s kelp forests. Here we show that this deforestation resulted in decreased macroalgal and invertebrate abundance and diversity, increased benthic irradiances, and reduced rates of gross primary production and respiration by the ecosystem. These opposing metabolic processes remain in balance, however, which resulted in little-to-no changes to net ecosystem production. These patterns were consistent across nine islands spanning more than 1000 kilometers of the archipelago. In light of the worldwide declines in kelp forests observed in recent decades, our findings suggest that marine deforestation profoundly affects the health of coastal ecosystems and how they function.Significance statementWidespread marine deforestation results in reduced biodiversity and primary productivity throughout more than 1000 km of the Aleutian Archipelago.

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Estimating Seagrass Community Metabolism Using Benthic Chambers: The Effect of Incubation Time

Cited by 48 publications

References 37 publications

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Seasonal metabolism and carbon export potential of a key coastal habitat: The perennial canopy‐forming macroalga Fucus vesiculosus

Not all plants are the same: Exploring metabolism and nitrogen fluxes in a benthic community composed of different aquatic plant species

Marine deforestation leads to widespread loss of ecosystem function

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