RHYTHMS OF VERTICAL MIGRATION AND MOTILITY IN INTERTIDAL BENTHIC DIATOMS WITH PARTICULAR REFERENCE TO<i>PLEUROSIGMA ANGULATUM</i>

Happey‐Wood, Christine M.; Jones, Peter

doi:10.1080/0269249x.1988.9705018

Cited by 42 publications

(28 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our observations suggest that the rhythmic diurnal migratory behaviour, previously described for tidal habitats, and for both lentic and lotic freshwater environments (for references see Happey-Wood & Jones, 1988), also exists in non-tidal marine habitats. However, the nature of the migratory behaviour requires further study.…”

Section: Discussionmentioning

confidence: 70%

An upright life-form of an epipelic motile diatom: on the behaviour ofGyrosigma balticum

Jönsson¹,

Sundbäck

Nilsson

1994

European Journal of Phycology

View full text Add to dashboard Cite

Previously undescribed behaviour of the large (~ 400 #m) motile diatom Gyrosigma balticum was observed in intact sediment cores from a non-tidal mudflat. Instead of lying flat against the sediment surface, the individual cells were found orientated with their long axes perpendicular to the sediment surface. Staining with toluidine blue indicated that the mechanism behind the erect position was a short (100-200 #m) mucilage tube produced at the lower end of the cell. It is suggested that the upright life-form may be common among epipelic diatoms. A diurnal/vertical rhythm into and out of the sediment was also observed. The peak of the oxygen profile in the Gyrosigma mat occurred 250--300 #m above the sediment surface, i.e. within the layer of upright cells.

show abstract

Section: Discussionmentioning

confidence: 70%

An upright life-form of an epipelic motile diatom: on the behaviour ofGyrosigma balticum

Jönsson¹,

Sundbäck

Nilsson

1994

European Journal of Phycology

View full text Add to dashboard Cite

show abstract

“…There has been speculation that one of the reasons MPB migrate into deeper sediments is to access the high concentrations of nutrients available in subsurface layers (Happey-Wood & Jones 1988, Barranguet et al 1998, Kingston 2002. Measured substrate concentrations by depth in our study site were more variable temporally than spatially (i.e.…”

Section: Influence Of In Situ Migration and Nutrient Oscillations On mentioning

confidence: 84%

Dissolved inorganic nitrogen uptake by intertidal microphytobenthos: nutrient concentrations, light availability and migration

Longphuirt¹,

Lim²,

Claquin³

et al. 2009

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The importance of intertidal flats as areas of nitrogen filtering has become increasingly apparent in recent times. To understand fully the cycling of this nutrient in these areas of high metabolic activity, it is necessary to elucidate the influence of microphytobenthos (MPB) on stocks of ammonium and nitrate in surface areas. In this study, we aimed to quantify nitrogen uptake and relate it to the in situ concentrations and environmental conditions to which MPB are exposed. In an estuarine system on the Korean Peninsula, we conducted kinetic experiments using 15 N stable isotopes and core sampling over the tidal cycle to determine the temporal evolution of porewater nutrient concentrations and the migration of MPB. The results revealed a range of K s values between 1.5 and 11.8 μmol l -1 for ammonium and 19.2 μmol l -1 for nitrate. Thus MPB communities vary their affinity for dissolved inorganic nitrogen (DIN), which may be related to the substrate conditions to which they are exposed. Uptake of ammonium under experimentally darkened or natural night conditions was, on average, 50% lower than during light periods. The range of porewater DIN concentrations was large and appeared to be primarily determined by tidal influences. This oscillation, coupled to the vertical migration of the MPB in sediments, is likely to have a substantial effect on uptake over the short term (hours). The results indicate that, contrary to our conceptual model, the MPB largely incorporates DIN at the sediment surface during low tide periods when ammonium concentrations are at their highest. As a result, our representation of the MPB in coastal and estuarine models needs to be reassessed.

show abstract

“…Especially on the latter topic there exists a wide range of investigations (e.g. PAMATMAT, 1968;FENCHEL and STRAARUP, 1971;ROUND, 1979;GAGOSIAN, 1982, 1987;SKJOLDAL, 1982;RIDOUT et al, 1984;PATERSON, 1986;RIAUX-GOBIN et al, 1987;FURLONG and CARPENTER, 1988;HAPPEY-WOOD and JONES, 1988;DELGADO, 1991;JÖNSSON et al, 1994). POULÍČKOVÁ (1987) studied the phytoplankton community in the hyporheic zone respectively in the groundwater of a river.…”

Section: Introductionmentioning

confidence: 98%

Abundance and Vertical Distribution of the Phytobenthic Community within a Pool and Riffle Sequence of an Alpine Gravel Stream

Müllner

Schagerl

2003

International Review of Hydrobiology

View full text Add to dashboard Cite

In the 2 nd order mountain brook "Oberer Seebach" (Austria), diatoms and cyanoprokaryotes dominate the microphytobenthos, with the diatoms forming the richest species group.Comparative investigations of different habitats clearly show seasonal variations in algal species composition and biomass throughout the year. Pool habitats hold a higher number of taxa than riffle sites. In addition, phytobiomass is two-to nearly fourfold higher in pools. Based on investigations of the chlorophyll-a vertical profiles within the coarse gravel sediments, the light discontinuity layer was determined to be situated at 7-10 cm sediment depth. Vertical distribution showed a maximum of taxa a few centimeters below the sediment surface. The same diatom taxa were found throughout all sampling dates, sediment depths and sampling sites.The results of exposed perforated metal tubes clearly indicate that the occurrence of phytobenthos in aphotic zones is primarily controlled by saltatory movements of the upper sediment layers driven by discharge.

show abstract

RHYTHMS OF VERTICAL MIGRATION AND MOTILITY IN INTERTIDAL BENTHIC DIATOMS WITH PARTICULAR REFERENCE TOPLEUROSIGMA ANGULATUM

Cited by 42 publications

References 22 publications

An upright life-form of an epipelic motile diatom: on the behaviour ofGyrosigma balticum

An upright life-form of an epipelic motile diatom: on the behaviour ofGyrosigma balticum

Dissolved inorganic nitrogen uptake by intertidal microphytobenthos: nutrient concentrations, light availability and migration

Abundance and Vertical Distribution of the Phytobenthic Community within a Pool and Riffle Sequence of an Alpine Gravel Stream

Contact Info

Product

Resources

About