Microphytobenthic productivity and biomass in sublittoral sediments of a stratified bay, southeastern Kattegat

Sundbäck, Kristina; Jönsson, Benno

doi:10.1016/0022-0981(88)90212-2

Cited by 95 publications

(59 citation statements)

References 39 publications

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“…Mass erosion of microphytobenthos has also been observed by Miller et al (1996). Sundbäck & Joensson (1988) suggested that the interaction of nutrients, light, sediment type, and 'degree of exposure to water movement' determines microphytobenthos biomass. Overall, shear velocity/shear stress must be considered in addition to light availability as it significantly affects microphytobenthos biomass above critical erosional levels.…”

Section: Discussionmentioning

confidence: 87%

Effect of oysters Crassostrea virginica and bottom shear velocity on benthic-pelagic coupling and estuarine water quality

Porter

Cornwell²,

Sanford³

2004

Mar. Ecol. Prog. Ser.

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Increasing the biomass of bivalve suspensions feeders has been proposed as a means to improve water quality in eutrophic estuaries such as the Chesapeake Bay. However, water quality impacts are likely to be determined by the balance of bivalve feeding and the deposition and sediment regeneration of nutrients from particulate organic matter. In shallow-water environments, benthic and pelagic processes are closely coupled and water flow can regulate the supply of seston to the bivalves. In addition, such flow may regulate benthic-pelagic nutrient fluxes through mass transfer limitation and resuspension. We studied the interacting effects of juvenile oysters Crassostrea virginica and bottom shear velocity on phytoplankton biomass and on nutrient regeneration in a series of three 4 wk long comparative experimental ecosystem experiments. All mesocosms had a 1000 l water volume, a 1 m 2 sediment surface area, and a 1 m water-column depth, and the same realistic water-column mixing (turbulence intensity 1 cm s -1 ). The systems included a multi-component mesocosm with moderate bottom shear velocity (0.6 cm s -1 ) and 2 standard cylindrical tanks with an unrealistically low bottom shear velocity (0.1 cm s -1 ). Oysters shifted processes to the sediments by decreasing phytoplankton biomass without stimulating additional blooms and by increasing light penetration to the bottom. Through complex and indirect relationships, the interaction of oysters and enhanced shear velocity significantly affected microphytobenthos biomass. Light, as enhanced by the oyster feeding on phytoplankton, increased microphytobenthos biomass; a moderate bottomshear velocity eroded the biomass. Microphytobenthos biomass decreased nutrient regeneration from the sediments to the water column and may have implications for water quality in low-energy parts of shallow-water estuaries such as Chesapeake Bay. Enhanced bottom shear in more energetic parts of shallow estuaries negatively affects microphytobenthos biomass and may increase nutrient regeneration from the sediments.

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Section: Discussionmentioning

confidence: 87%

Effect of oysters Crassostrea virginica and bottom shear velocity on benthic-pelagic coupling and estuarine water quality

Porter

Cornwell²,

Sanford³

2004

Mar. Ecol. Prog. Ser.

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“…Generally, diatoms can grow and/or survive under very low irradiances (single photons m -2 s -1 ) (Wulff et al 2005;Cahoon 1999). A preference for moderate depths was found along a depth gradient on the Swedish West coast, where higher chl a was found in 14-16 m (Sundbäck and Jönsson 1988). However, this preference could also been related to less physical disturbance such as wave action.…”

Section: Heterogeneity In Productivitymentioning

confidence: 89%

Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line

et al. 2010

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During summer 2007, Arctic microphytobenthic potential primary production was measured at several stations around the coastline of Kongsfjorden (Svalbard, Norway) at B5 m water depth and at two stations at five different water depths (5, 10, 15, 20, 30 m). Oxygen planar optode sensor spots were used ex situ to determine oxygen exchange in the overlying water of intact sediment cores under controlled light (ca. 100 lmol photons m -2 s -1 ) and temperature (2-4°C) conditions. Patches of microalgae (mainly diatoms) covering sandy sediments at water depths down to 30 m showed high biomass of up to 317 mg chl a m -2 . In spite of increasing water depth, no significant trend in ''photoautotrophic active biomass'' (chl a, ratio living/dead cells, cell sizes) and, thus, in primary production was measured at both stations. All sites from B5 to 30 m water depth exhibited variable rates of net production from -19 to ?40 mg O 2 m -2 h -1 (-168 to ?360 mg C m -2 day -1 ) and gross production of about 2-62 mg O 2 m -2 h -1 (17-554 mg C m -2 day -1

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“…Usually 2, but occasionally 4, cores were then randomly assigned to each of 5 PAR treatments: 0, 67, 107, 220, or 362 PE m-* S-'. The highest PAR treatment was based on maximum light-saturation values for benthic microalgae (Colijn & van Buurt 1975, Sundback & Jonsson 1988. Cores to be incubated in the dark were stoppered and double-wrapped in aluminum foil.…”

Section: Samplingmentioning

confidence: 99%

“…Fish and Wildlife Service, National Wetlands Research Center, 700 Cajundome Blvd., Lafayette, Louisiana 70506, USA benthic microalgal production of 128.6 g C m-2 for 16 intertidal and 2 subtidal ecosystems, a rate which often equals or exceeds area1 phytoplankton production (Marshall et al 1971, Cadee & Hegeman 1974, Joint 1978, Rizzo 1986, Murray & Wetzel 1987, Fielding et al 1988. In subtidal sediments benthic microalgal production can vary from < l to 253 g C m-' yr-' (Marshall et al 1971, Davis & McIntire 1983, Nienhuis & de Bree 1984, Nowicki & Nixon 1985a, Rizzo & Wetzel 1986, Wasmund 1986, Murray & Wetzel 1987, Fielding et al 1988, Sundback & Jonsson 1988, Delgado 1989.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Significance of euphotic sediments to oxygen and nutrient cycling in a temperate estuary

Rizzo¹,

Lackey²,

Christian³

1992

Mar. Ecol. Prog. Ser.

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Sediment-water nutrient and oxygen exchanges were measured under light and dark conditions at 1 oligohaline (Stn D) and 1 mesohaline (Stn A) shallow (1 m) site in the Neuse River estuary, North Carolina. USA. Mean respiration rates were very similar between sites (11 to 12 mg 0 2 m-' h-'), but maximum net productivity at the mesohaline site (74 mg Oz m-' h-') was nearly twice that of the oligohaline site (40 mg O2 m-2 h-'). NH4 fluxes were also significantly different. On average, releases of NH, from sediments at both sites occurred in the dark (13 to 22 pm01 N h-' for Stns D and A, respectively) and, slightly, at the lowest irradiance (67 E m-' S-'. 0.3 to 5 pm01 N h-'). NH, was taken up at average rates between 3 and 12 pm01 N m-' h-' at 3 higher irradiances. Mean NO, (nitrate + nitnte) fluxes were very low ( < l 0 pm01 N m-2 h-'), nearly always directed out of the sediment, and not significantly different. Filterable reactive phosphorus fluxes also did not follow any consistent response to changes in irradiance. Flux vs irradiance curves were used in conjunction with estimates of in situ light availability to the benthos to compute ecosystem-level influence of autotrophy on material exchanges. The autotropic-heterotrophic transitions were 1 to 2 m (oligohaline) and 3 to 4 m (mesohaline). When integrated over depth and area the mesohaline sediments were always net NH, sources to the water column, net O2 sources in fall and winter and net O2 sinks in spring and summer. Oligohaline sediments were O2 sinks except during fall, and NH, sources only in winter and summer. Cultural eutrophication has the potential to alter the balance of benthic autotrophy and heterotrophy which in turn may foster phytoplanktonic productivity.

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Microphytobenthic productivity and biomass in sublittoral sediments of a stratified bay, southeastern Kattegat

Cited by 95 publications

References 39 publications

Effect of oysters Crassostrea virginica and bottom shear velocity on benthic-pelagic coupling and estuarine water quality

Effect of oysters Crassostrea virginica and bottom shear velocity on benthic-pelagic coupling and estuarine water quality

Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line

Significance of euphotic sediments to oxygen and nutrient cycling in a temperate estuary

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