Influence of nutrients, temperature, light and salinity on the occurrence of Paralia sulcata at Helgoland Roads, North Sea

Gebühr, Christina; Wiltshire, Karen Helen; Aberle, Nicole; Beusekom, Justus E. E. van; Gerdts, Gunnar

doi:10.3354/ab00191

Cited by 48 publications

(50 citation statements)

References 39 publications

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“…P. sulcata did not typically form large blooms, but was found during the mixed periods by Shon et al(2008), and we recorded it as one of the characteristic autumn species. It was positively related to nutrient concentrations, similarly reported by Gebühr et al (2009). O. hydroideus was assumed to have an affinity to habitats with increased nutrient levels (Andruleit, 2007), and we indeed found it to be related with nutrient rich conditions.…”

Section: Seasonal Succession Of the Phytoplankton Speciessupporting

confidence: 70%

Seasonal phytoplankton dynamics in the coastal waters of the north-eastern Adriatic Sea

Godrijan

Marić

Tomažić

et al. 2013

Journal of Sea Research

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This study describes the dynamics of phytoplankton in relation to environmental factors in coastal waters of the north-eastern Adriatic Sea. The distant Po River"s influence is rarely noted on the eastern coastal part of the northern Adriatic, but it does trigger the crucial alternations in the community, e.g. mass development of diatoms in July 2009. A highly variable ecosystem, like the northern Adriatic, sustains high species diversity. Even though quite a few species were present for more than several months, we identified the seminal species of the seasonal succession. During spring Prorocentrum micans, Leptocylindrus minimus, Chaetoceros throndsenii, Ceratium furca and C. fusus were most characteristic. These species thrive in low salinity and mixed waters. Typical summer diatom species were Chaetoceros vixvisibilis, Proboscia alata, whileRhabdosphaera clavigera and Syracosphaera pulchra were identified as distinctive summer coccolithophorids. All the summer species preferred warmer waters with low nitrate and low silica content. The autumn community was characterised by species such as Calciosolenia murrayi, Chaetoceros socialis, Asterionellopsis glacialis, Lioloma pacificum. These species related to high nutrient conditions, but also to low Po River influence. In winter a prevalence of large diatoms Thalassiosira rotula, Neocalyptrella robusta and Pseudosolenia calcar-avis was recorded. The winter assemblage was characterised by species of cold water preference able to grow in well mixed conditions.

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Section: Seasonal Succession Of the Phytoplankton Speciessupporting

confidence: 70%

Seasonal phytoplankton dynamics in the coastal waters of the north-eastern Adriatic Sea

Godrijan

Marić

Tomažić

et al. 2013

Journal of Sea Research

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“…As shown by Gebühr et al (2009), an increase of the yearly Fig. 8 The different choices of a split point, segmenting the period from 1962 to 2008 into two subintervals, are plotted along the abscissa.…”

Section: Discussion/conclusionmentioning

confidence: 99%

“…Its presence in the water column could be dependent on resuspension through wind-driven turbulence or tidal mixing (Gebühr et al 2009). …”

Section: Discussion/conclusionmentioning

confidence: 99%

Changes in the phytoplankton community at Helgoland, North Sea: lessons from single spot time series analyses

et al. 2012

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In recent regime shift analyses, the phytoplankton compartment of the marine food web was essentially represented by phytoplankton color or chlorophyll concentration. A detection of changes directly at the species level is highly desirable. The Helgoland Roads data series, a collection of high frequency long-term time series comprising biological and physico-chemical components of the southern North Sea, allow such an investigation at the level of single species. Aiming at a detection and characterization of habitat and community changes in the observation period (1962 until the end of 2008), we selected six species as representatives of certain classes, for example, benthic or neritic species, and applied a combination of novel analysis methods-a fitness-based analysis of the realized niche, a bloom-triggered averaging and a Markovian analysis of co-occurrence and succession patterns-to related abundance time series and concurrent environmental parameter time series. We found a general trend toward enlargement of niche size and shifts of the niche position, interesting salinity patterns around bloom events of two species, and statistically highly significant changes of a phytoplankton community segment after 1965 and after 1998. Interpreting our observations in ecological terms leads to the formulation of testable hypotheses.

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“…Primarily growing in the benthos (McQuoid and Hobson, 1998), with an affinity for arenaceous sediments (Round et al, 1990), strong physical mixing may play a crucial role in transporting cells into the plankton. There is also a correlation with increased storminess and wind-mixing and the enhanced presence of P. sulcata in more pelagic environments (Gebühr et al, 2009). More recent taxonomic studies demonstrate that P. sulcata is actually a species complex such that new species are now being defined by SEM and molecular methods although these are collectively referred to as Paralia sulcata (sensu lato) (MacGillivary and Kaczmarska, 2015).…”

Section: Tychoplanktonic and Near-shore Taxamentioning

confidence: 99%

Late Cretaceous seasonal palaeoclimatology and diatom palaeoecology from laminated sediments

Davies

Kemp

2016

Cretaceous Research

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Laminated diatom-rich marine sediments from California and the Arctic Ocean provide a window into the seasonal climate and oceanography of the mid-and high-latitude Late Cretaceous. These remarkable shallow-buried sediments constitute palaeo-sediment traps that record exceptionally well-preserved sequential biogenic and lithogenic flux events. Many of the diatom laminae are composed of a few dominant taxa, and we use a species-based approach for palaeoecological interpretation. Contrary to many earlier interpretations, results indicate that both sites preserve a major flux of taxa adapted to exploit a strongly stratified ocean. The uppermost Maastrichtian Marca Shale of California records a seasonal cycle initiated with a spring bloom flux of diatom resting spores followed by a summer lithogenic sediment input likely driven by monsoonal storms providing river runoff and aeolian input. This is followed by a dominant diatom flux of species that thrived in the summer stratification in deep chlorophyll maxima and were sedimented in the fall when this stratification broke down. Dominant taxa comprising this group include Hemiaulus, Stephanopyxis, Stellarima and Rhizosolenia. The uppermost Campanian CESAR 6 core from the Arctic Alpha Ridge, records a spring bloom flux of resting spores followed by a more dominant summer and fall flux of diatom vegetative cells which were likely concentrated in subsurface summer blooms that generated a "summer export pulse" and by the breakdown of stratification in the fall that gave massive flux of deep chlorophyll maxima species in the fall dump. The dominance and diversity of Hemiaulus in the CESAR 6 core together with widespread evidence of N 2 -fixation may indicate that some diatom blooms were powered by intracellular N 2 -fixing cyanobacteria as in the modern oligotrophic ocean. Thin lenses of fine lithogenic sediment that occur mostly in the spring layer represent rafting by winter sea ice and support other evidence that suggests intermittent winter freezing in the Late Cretaceous Arctic.Keywords: Late Cretaceous; Diatom blooms; Paleoecology; California; Arctic; Sea Ice 3 1.Introduction Laminated pelagic and hemipelagic marine sediments often constitute "palaeosediment traps" that preserve sequential flux events from which the ancient seasonal flux cycle may be reconstructed. They commonly preserve both the biogenic flux events from surface ocean productivity and also the terrigenous sediment input common in hemipelagic or marginal settings. Within rare, exceptionally well-preserved Cretaceous sediments, fossil diatom algae record the seasonal cycle of marine production and flux to the sea bed. In the modern ocean diatom algae are the dominant, bloom-forming phytoplankton in many environments and are key players in the marine biological carbon pump. The relative contribution of diatoms to total primary production has been estimated to range from 35% in the oligotrophic oceans to 75% in the coastal zone and in the Antarctic (Nelson et al., 1995), while their contribution...

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Influence of nutrients, temperature, light and salinity on the occurrence of Paralia sulcata at Helgoland Roads, North Sea

Cited by 48 publications

References 39 publications

Seasonal phytoplankton dynamics in the coastal waters of the north-eastern Adriatic Sea

Seasonal phytoplankton dynamics in the coastal waters of the north-eastern Adriatic Sea

Changes in the phytoplankton community at Helgoland, North Sea: lessons from single spot time series analyses

Late Cretaceous seasonal palaeoclimatology and diatom palaeoecology from laminated sediments

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