Phytoplankton- and nutrient dynamics in saline lake grevelingen (SW Netherlands) under different hydrodynamical conditions in 1978–1980

Bakker, C.; Vries, I. de

doi:10.1016/0077-7579(84)90002-4

Cited by 28 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this will not seriously affect our conclusions, because silicate turns over more slowly than nitrogen (Officer & Ryther, 1980). De Jong et al (1994) found a strong increase of microphytobenthic biomass during post-barrier years and it is well documented that phytoplankton (especially diatoms) may compete for nutrients with benthic diatoms (Bakker & de Vries, 1984;De Vries & Hopstaken, 1984). This aspect of competition between phytoplankton and microphytobenthos for nutrients in the water column is discussed in .…”

Section: Nutrientsmentioning

confidence: 91%

Turbidity, nutrients and phytoplankton primary production in the Oosterschelde (The Netherlands) before, during and after a large-scale coastal engineering project (1980–1990)

Wetsteyn¹,

Kromkamp

1994

Hydrobiologia

View full text Add to dashboard Cite

Turbidity, nutrient concentrations and phytoplankton primary production were monitored in the Oosterschelde before, during and after the construction of a storm-surge barrier and two compartment dams .Flow velocities and suspended matter concentrations decreased severely, causing an increased transparency of the watercolumn . In the eastern and northern compartments, the previously pronounced seasonal variation disappeared.Reduction of the freshwater load and decreasing nutrient concentrations in the adjacent North Sea coastal waters resulted in lower nitrite + nitrate and silicate concentrations . Autumn phosphate concentrations remained at the same level as before the nutrient reduction . Silicate was a limiting nutrient during the pre-barrier period and nitrogen and silicate were limiting during the post-barrier period .Annual patterns in chlorophyll-a concentrations in the western and central compartments showed no obvious trend ; in the eastern and northern compartments higher values were measured from 1985 onwards .Primary production during the period 1980-1990 varied between 176 and 550 g C m -2 yr -`. The annual primary production in the western compartment had decreased, while in the central and eastern compartments annual primary production did not change : the formerly existing gradient disappeared . In the northern compartment higher chlorophyll-a concentrations and high annual production suggest that the phytoplankton could benefit from the increased transparency while nutrient concentrations were still high enough to support phytoplankton growth .Changes in photosynthetic physiological parameters were observed which suggested shade adaptation . This is in contrast to improved light conditions and reduced nutrient availibility . The apparent incoherence with light-shade adaptation theory may be explained by the species shift that occurred .As a result of the opposite effects of a more favourable light climate and a reduced nutrient availability, together with the resulting species shift, the annual primary production showed a large degree of homeostasis .

show abstract

Section: Nutrientsmentioning

confidence: 91%

Turbidity, nutrients and phytoplankton primary production in the Oosterschelde (The Netherlands) before, during and after a large-scale coastal engineering project (1980–1990)

Wetsteyn¹,

Kromkamp

1994

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…Ch. seiracanthum Gran (BAKKER and BE VRIES, 1984). Also these resting cysts have been pictured by Van der Werff in ~is letter of 08-11-1977, but are not figured here.…”

Section: Discussionmentioning

confidence: 83%

“…Generously he had identified numerous Chaetoceros species and I asked him to give special attention to those with resting cysts. The phytoplankton species list was published (BAKKER and DE VRIES, 1984) …”

Section: Introductionmentioning

confidence: 99%

Resting cysts of someChaetoceros species, identified and figured by A. Van der Werff

Bakker¹

1994

Netherlands Journal of Aquatic Ecology

Self Cite

View full text Add to dashboard Cite

This note is dedicated to Nbert van der Werff (1903Werff ( -1991, the Dutch diatom expert, distributing his extended knowledge to numerous students interested in aquatic ecology. His drawings of the resting cysts of Chaetoceros affine Lauder and Ch. constricturn Gran, not figured in his diatom flora ( VAN DER WERFF and HULS, 1957-1974), are published and discussed. The figures represent a valuable contribution to taxonomical literature.

show abstract

“…8b) and the flagellate Eutreptiella (Fig. 4d), are common in Grevelingen (Bakker & de Vries, 1984). Grevelingen is a tideless saline lagoon, a former tidal estuary, previously connected to the Oosterschelde (Fig .…”

Section: Discussionmentioning

confidence: 99%

“…This Oosterschelde summer situation resembles the nutrient conditions observed in Grevelingen lagoon with the important distinction however that in the latter stagnant basin stratification occurs during summer . Incidental increase of diatom biomass in summer could be explained (in Grevelingen) by sudden increases of silica and nitrogen concentrations caused by release from the bottom and turnover of the stratification (Bakker & de Vries, 1984).…”

Section: Discussionmentioning

confidence: 99%

A new trend in the development of the phytoplankton in the Oosterschelde (SW Netherlands) during and after the construction of a storm-surge barrier

1994

Self Cite

View full text Add to dashboard Cite

During the pre-barrier period , the Oosterschelde phytoplankton were a diatom-dominated community, comprising a species-rich assemblage throughout the year . Assemblages of spring, early summer and summer, developed in response to a gradually evolving turbidity-light gradient during the course of the year.During the barrier-construction period , characterized by decreasing current velocities, increasing sedimentation of suspended matter, increasing water transparencies and unchanged nutrient conditions, the growth season for the phytoplankton started earlier and lasted longer . Some flagellate species responded by much higher biomass than before . The impact of short-term climatic factors during this period, notably severe winters, could be illustrated with examples of clear responses of some species (e .g . Biddulphia aurita) .In the post-barrier years (1987-90) a changed light-nutrient-salinity regime (i.e . much light, limitation of nitrate, high salinity) was demonstrated and an extended summerseason developed, without the original gradual transitions . This was reflected in an a-seasonal trend of the phytoplankton assemblage, where summer species were already observed in spring and spring species decreased in abundance . In summer small flagellates increased and some weakly silicified diatom species made their appearance . In the eastern compartment no colony formation of Phaeocystis occurred in summer and this was thought to be due to nitrate limitation . Changes in abundance of some species (Phaeocystis, Ditylum brightwellii, Skeletonema costatum), occurring during the entire period of investigation , could be explained using field observations compared with experimental evidence from the literature .The relationship between species composition and biomass on the one hand and environmental variables on the other hand, was analysed in a Canonical Correspondence Analysis, for both compartments separately .

show abstract

Phytoplankton- and nutrient dynamics in saline lake grevelingen (SW Netherlands) under different hydrodynamical conditions in 1978–1980

Cited by 28 publications

References 24 publications

Turbidity, nutrients and phytoplankton primary production in the Oosterschelde (The Netherlands) before, during and after a large-scale coastal engineering project (1980–1990)

Turbidity, nutrients and phytoplankton primary production in the Oosterschelde (The Netherlands) before, during and after a large-scale coastal engineering project (1980–1990)

Resting cysts of someChaetoceros species, identified and figured by A. Van der Werff

A new trend in the development of the phytoplankton in the Oosterschelde (SW Netherlands) during and after the construction of a storm-surge barrier

Contact Info

Product

Resources

About