Importance and abundance of the recently established speciesCoscinodiscus wailesii Gran &amp; Angst in the German Bight

Rick, H. J.; Dürselen, Claus‐Dieter

doi:10.1007/bf02368362

Cited by 19 publications

(13 citation statements)

References 19 publications

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“…Its rapid establishment and success along the European continental coast and in the German Bight is particularly noteworthy, as the species can dominate the phytoplankton biomass over long periods in this area. Rick & DÏrselen (1995) reported that during the period December 1988 to March 1989 the majority of phytoplankton carbon (up to 90%) in the German Bight could be attributed to this species. One likely reason for the success of C. wailesii and its ability to establish itself in new areas probably stems from its tolerance of wide temperature (from 08C to 4208C), salinity (24^35 psu) and nutrient regimes (DÏrselen & Rick, 1999).…”

Section: Resultsmentioning

confidence: 99%

Case history and persistence of the non-indigenous diatom Coscinodiscus wailesii in the north-east Atlantic

et al. 2001

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The introduction of non-indigenous marine plankton species can have a considerable ecological and economic effect on regional systems. Their presence, however, can go unnoticed until they reach nuisance status and as a consequence few case histories exist containing information on their initial appearance and their spatio–temporal patterns. Here we report on the occurrence of the non-indigenous diatom Coscinodiscus wailesii in 1977 in the English Channel, its subsequent geographical spread into European shelf seas, and its persistence as a significant member of the diatom community in the north-east Atlantic from 1977–1995.

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Section: Resultsmentioning

confidence: 99%

Case history and persistence of the non-indigenous diatom Coscinodiscus wailesii in the north-east Atlantic

et al. 2001

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“…A late winter bloom of C. wailesii was reported in the Bay of Biscay during March 2001 also causing heavy mucilage production when the bloom declined (Gohin et al, 2003). A review of C. wailesii occurrence in the German Bight found that N 90% of phytoplankton carbon was contributed by C. wailesii between December 1988 and March 1989 (Rick and Duerselen, 1995). The authors also found the species in autumn.…”

Section: Growth Of C Wailesii Under Different Nutrient Conditions Anmentioning

confidence: 98%

Cell death and aggregate formation in the giant diatom Coscinodiscus wailesii (Gran & Angst, 1931)

Armbrecht

Smetacek

Assmy

et al. 2014

Journal of Experimental Marine Biology and Ecology

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The demise phase of diatom blooms following nutrient exhaustion is characterised by the formation of aggregates with high sinking rates that facilitate carbon export to the seafloor. However, the nature of the binding substances involved and the physiological status of the phytoplankton during aggregation are not well established. Transparent Exopolymer Particles (TEP), exudated by living cells, have been proposed as a binding agent of aggregates but autolysed cytoplasm released after cell death might also play such a role. To differentiate these processes we studied the response of cultures of the mucilage and TEP-producing giant diatom Coscinodiscus wailesii to nutrient, in particular silicic acid, limitation. Two staining methods were applied: SYTOX® Green to follow cell viability and cell death and Alcian Blue (AB) to quantify the production of TEP. Large aggregates formed exclusively in cultures with high cell densities in which the SYTOX® Green signal increased during the senescence phase. TEP-production under nutrient replete (f/2 treatment) and nitrate reduced growth conditions (f/2-N treatment) with high cell densities was comparatively low, indicating reduced photosynthetic activity in the stationary and senescent phases. In contrast, TEP-production was enhanced in low-density Si-limited cultures (f/2-Si treatment), probably as a means to discharge excess photosynthate, as the cells were densely packed with chloroplasts. The C/N ratios of aggregated and solitary cells did not differ significantly indicating that the binding agent was not mainly polysaccharidic. We propose that aggregate formation in C. wailesii is a consequence of cell lysis after cell death and that autolysed cytoplasm is the binding agent rather than TEP. This would imply that cell lysis plays a substantial role in bloom termination and mucilage formation in C. wailesii, which would in turn influence biogeochemical cycling in regions where this diatom thrives.

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“…Blooms of large Coscinodiscus wailesii have been reported in the Seto Inland Sea of Japan (Manabe & Ishio 1991) and the German Bight (Rick & Dürselen 1995), where this species can account for up to 90% of phytoplankton biomass retained on 0.2 µm filters. Given cell sizes observed in Cattle Pass (~190 µm radius × 220 µm height), I used Strathmann's (1969) equations to estimate that 1 cell contains about 1.5 µg of carbon; equivalently, 6.6 × 10 2 cells contribute approximately 1 mg of carbon.…”

Section: A)mentioning

confidence: 99%

Tidal changes in copepod abundance and maintenance of a summer Coscinodiscus bloom in the southern San Juan Channel, San Juan Islands, USA

Zamon¹

2002

Mar. Ecol. Prog. Ser.

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Importance and abundance of the recently established speciesCoscinodiscus wailesii Gran & Angst in the German Bight

Abstract: Grids of 17 to 50 stations in the German Bight were sampled 18 times within the framework of the multidisciplinary programmes ZISCH and PRISMA in winter and spring of 1988/89

Cited by 19 publications

References 19 publications

Case history and persistence of the non-indigenous diatom Coscinodiscus wailesii in the north-east Atlantic

Case history and persistence of the non-indigenous diatom Coscinodiscus wailesii in the north-east Atlantic

Cell death and aggregate formation in the giant diatom Coscinodiscus wailesii (Gran & Angst, 1931)

Tidal changes in copepod abundance and maintenance of a summer Coscinodiscus bloom in the southern San Juan Channel, San Juan Islands, USA

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