Primary production of the benthic microflora living on tidal flats in the dutch wadden sea

Cadée, Gerhard C.; Hegeman, J.

doi:10.1016/0077-7579(74)90020-9

Cited by 261 publications

(128 citation statements)

References 41 publications

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“…The significant variations of abundance and chl a concentration found in May 2008 and May 2009 are probably related to the difference in sediment surface temperature (difference between the two months: 11 C). In general, seasonal changes in intertidal systems subjected to large fluctuations of various environmental factors can mostly be explained by specific adaptations to light and temperature conditions (Cade´e & Hegeman, 1974;Grant, 1986;Blanchard et al, 1996;Barranguet et al, 1998). In the present investigation, the seasonal dynamics of the different MPB groups showed very similar patterns at the different stations (cf.…”

Section: à2supporting

confidence: 57%

Microphytobenthic dynamics in a Wadden Sea intertidal flat – Part II: Seasonal and spatial variability of non-diatom community components in relation to abiotic parameters

Scholz

Liebezeit

2012

European Journal of Phycology

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The microphytobenthos colonizing the intertidal flats forms an important component of the Wadden Sea. Ten sampling points along a 1-km transect were studied in a fringe area of the Soltho¨rn tidal flat, southern North Sea, in order to determine seasonal differences in the microphytobenthos. An accompanying paper deals with the major component of the flora, the diatoms; here we, focus on the minor taxonomic groups. From May 2008 to May 2009 surface sediments were collected during low tide. Variation of environmental factors as well as microphytobenthic density (abundance and chlorophyll a) were monitored. The area investigated was a mixed-sediment mudflat, with a gradient from coarse to fine. Highest biomass was obtained in summer 2008 with 215.9 AE 12.6 mg chlorophyll a m -2 . In late autumn the chlorophyll a concentration decreased continuously at all investigated stations. Lowest values were detected in December 2008. Species abundances varied considerably both along the transect and seasonally, depending on species-specific requirements as well as hydrodynamic conditions (tidal currents). Higher densities of benthic pro-and eukaryotic microalgae were observed in sites characterized by fine sediments. Apart from the diatoms, the most abundant microphytobenthic group was the cyanophytes. Coccoid cyanophytes, mainly Merismopedia sp., were most abundant during summer, with cell numbers up to 5.72 Â 10 6 cells cm À2, while diatoms dominated in winter, spring and autumn. Filamentous cyanophytes, particularly Microcoleus chthonoplastes, were most abundant during autumn, while coccoid chlorophytes (spring: Chlorococcum submarinum, Crucigenia tetrapedia, Tetraselmis suecica), euglenophytes (summer: Euglena obtusa), dinophytes (autumn: Amphidinium operculatum, A. herdmanii) and cryptophytes (autumn: Hillea marina, Hemiselmis virescens) contributed to the microphytobenthos during warmer seasons. The statistical analysis confirmed that the composition of the microphytobenthos was related to sediment features and to characteristics of particular seasons.

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Section: à2supporting

confidence: 57%

Microphytobenthic dynamics in a Wadden Sea intertidal flat – Part II: Seasonal and spatial variability of non-diatom community components in relation to abiotic parameters

Scholz

Liebezeit

2012

European Journal of Phycology

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“…Due to the growth of benthic organisms, tidal Xats add signiWcantly to the primary production and the Chl-a concentration in the Wadden Sea. For example, Cadée and Hegeman (1974) found a production of 100 g C m ¡2 year…”

Section: ¡2mentioning

confidence: 99%

“…The opposite of resuspension, settling, occurs to SPM and microphytobenthos in calm water, for example during slack tide, and is stimulated by structures that protect areas from currents and waves, such as sea grass. Also macroinvertebrates as mussels and cockles may remove large quantities of Chl-a (Dame et al 1991;Dame and Dankers 1988) and SPM (Beukema and Cadée 1996;Dankers and Koelemaij 1989;Cadée and Hegeman 1974) from the water column by Wlter-feeding.…”

Section: Variation Due To Resuspensionmentioning

confidence: 99%

A review on substances and processes relevant for optical remote sensing of extremely turbid marine areas, with a focus on the Wadden Sea

et al. 2010

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The interpretation of optical remote sensing data of estuaries and tidal Xat areas is hampered by optical complexity and often extreme turbidity. Extremely high concentrations of suspended matter, chlorophyll and dissolved organic matter, local diVerences, seasonal and tidal variations and resuspension are important factors inXuencing the optical properties in such areas. This review gives an overview of the processes in estuaries and tidal Xat areas and the implications of these for remote sensing in such areas, using the Wadden Sea as a case study area. Results show that remote sensing research in extremely turbid estuaries and tidal areas is possible. However, this requires sensors with a large ground resolution, algorithms tuned for high concentrations of various substances and the local speciWc optical properties of these substances, a simultaneous detection of water colour and land-water boundaries, a very short time lag between acquisition of remote sensing and in situ data used for validation and suYcient geophysical and ecological knowledge of the area.

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“…Amphora is a common benthic microalgae found in coastal benthic and pelagic environments (Welker et al 2002;Kasim and Mukai 2006;Facca and Sfriso 2007). Benthic microalgal communities are important primary producers in a wide variety of shallow coastal areas (Cadee and Hegeman 1974;Colijn and De Jonge 1984;Cahoon and Cooke 1992;Barranguet 1997;Nelson et al 1999). Up to 40% of the photosynthetically fixed carbon is lost by benthic and pelagic diatoms as an extracellular release (Fogg 1983;Smith and Underwood 1998;Taylor and Paterson 1998).…”

Section: Introductionmentioning

confidence: 99%

Application of cross‐flow ultrafiltration for isolating exopolymeric substances from a marine diatom (Amphora sp.)

Zhang

Santschi

2009

Limnology & Ocean Methods

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The increasing recognition of the roles that exopolymeric substances (EPS) play in the aquatic environment necessitates obtaining sufficient quantities of purified EPS for exploration of its physical, chemical, and biological properties, as well as for quantitative and structural analysis of its composition. For this purpose, three preconcentration/purification techniques, i.e., 1) ethanol precipitation, 2) stirred-cell ultrafiltration, and 3) crossflow ultrafiltration, followed by stirred-cell diafiltration, were compared for their effectiveness to quantitatively isolate EPS from laboratory cultures of Amphora sp. The results showed that the classical ethanol precipitation method was not effective in isolating and concentrating EPS from this seawater culture medium. Stirredcell ultrafiltration appeared best for harvesting EPS from this diatom. However, because of its limitations in terms of time and volume, cross-flow ultrafiltration needed to be first applied, along with some necessary improvements, followed by a three-step cartridge soaking and stirred-cell diafiltration. After cartridge soaking, the yields of the two ultrafiltration methods were comparable. Two different fractions were obtained from EPS of Amphora sp. by anion exchange chromatography and were characterized respectively. Whereas these purified fractions had similar molecular weights of 1000 kDa, their monosaccharide composition was different. In conclusion, cross-flow ultrafiltration followed by stirred-cell diafiltration with additional cartridge washing turned out to be the optimal method for EPS separation, based on time, cost, and yield.

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Primary production of the benthic microflora living on tidal flats in the dutch wadden sea

Cited by 261 publications

References 41 publications

Microphytobenthic dynamics in a Wadden Sea intertidal flat – Part II: Seasonal and spatial variability of non-diatom community components in relation to abiotic parameters

Microphytobenthic dynamics in a Wadden Sea intertidal flat – Part II: Seasonal and spatial variability of non-diatom community components in relation to abiotic parameters

A review on substances and processes relevant for optical remote sensing of extremely turbid marine areas, with a focus on the Wadden Sea

Application of cross‐flow ultrafiltration for isolating exopolymeric substances from a marine diatom (Amphora sp.)

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