Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom

Wang, Zhaohui; Qi, Yuzao; Yang, Yalin

doi:10.1093/plankt/fbm008

Cited by 74 publications

(65 citation statements)

References 32 publications

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“…This is not straightforward, due to differences in sampling intervals, problems in the identification of motile taxa at the species level, advection processes that affect the water column, etc., but it can provide some valuable information. High fluxes of calcareous cysts, dominated by spiny cysts of the Scrippsiella trochoidea complex, are the hallmark of all studies carried out in coastal temperate areas and, in some cases, a relatively good match has been reported between these cysts and S. trochoidea-like cells in the water column (this study, Montresor et al, 1998, Wang et al, 2007. In the present study, high production rates of S. trochoidea cysts were recorded in August, and may have been stimulated by the relatively low nutrient concentration as described in Rengefors et al (1996) and/or may have coincided with the end of the bloom period of this species.…”

Section: Dinoflagellate Cysts Fluxes and Cells In The Water Columnmentioning

confidence: 70%

“…In a few studies (Montresor et al, 1998;Godhe et al, 2001;Wang et al, 2007), attempts were made to relate the timing and abundance of cyst fluxes with the corresponding concentration of motile cells in the water column. This is not straightforward, due to differences in sampling intervals, problems in the identification of motile taxa at the species level, advection processes that affect the water column, etc., but it can provide some valuable information.…”

Section: Dinoflagellate Cysts Fluxes and Cells In The Water Columnmentioning

confidence: 99%

“…The switch from actively growing cells to resting cysts can in fact contribute to a bloom termination (e.g., Kremp & Heiskanen, 1999), while the germination of cysts can represent the inoculum for future blooms in the water column (e.g., Anderson et al, 2005;Wang et al, 2007;Ishikawa et al, 2014). The formation of resting cysts might represent an adaptive trait for protists living in highly variable coastal environments.…”

Section: Introductionmentioning

confidence: 99%

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Dinoflagellate cysts production in the north-western Adriatic Sea

Bastianini

Totti

Penna³

et al. 2016

Medit. Mar. Sci.

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A sediment trap study was conducted in the Gulf of Venice, north-western Adriatic Sea, from April to December 2005 to assess relationships between planktonic dinoflagellates and cyst production. Every month, CTD profiles and discrete samplings for phytoplankton, nutrients and particulate matter were conducted. Cyst fluxes spanned from 90 to 127,600 cysts m-2 d-1 and major peaks were due to a small cyst attributed to cf. Biecheleria and to calcareous cysts of Scrippsiella trochoidea. A good correspondence between cyst fluxes in sediment traps and the presence of the corresponding vegetative cells in the water column was detected for Lingulodinium polyedrum, and species of the genera Spiniferites,Gonyaulax and Protoperidinium. A PCR method applied to surface sediment samples allowed the identification of a number of potentially harmful dinoflagellate cysts (Alexandrium minutum, A. tamutum, A. taylorii, Lingulodinium polyedrum and Protoceratium reticulatum).

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Section: Dinoflagellate Cysts Fluxes and Cells In The Water Columnmentioning

confidence: 70%

Section: Dinoflagellate Cysts Fluxes and Cells In The Water Columnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dinoflagellate cysts production in the north-western Adriatic Sea

Bastianini

Totti

Penna³

et al. 2016

Medit. Mar. Sci.

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“…S. trochoidea is a cosmopolitan bloom forming species (Wang et al 2007) and thus plays a significant role in ecosystem functioning across the world. Moreover, S. trochoidea was previously observed to form temporary cysts in response to allelochemicals in our laboratory (Fistarol et al 2004) and we wanted to examine if such a mechanism would also occur in response to the presence of grazers (copepods) and/or low light conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Scrippsiella trochoidea cultures were harvested in mid-exponential phase and inoculated into each flask at a target concentration of 400 cells ml , based on previous measurements of particulate or ganic carbon, POC). We chose this concentration be cause S. trochoidea cell concentrations lie around this value during the build-up of S. trochoidea blooms (Wang et al 2007). At the corresponding carbon concentration, 560 µg C l -1 , A. tonsa ingestion rates are high but not completely saturated (Kiørboe et al 1985).…”

Section: Methodsmentioning

confidence: 99%

Influence of altered light conditions and grazers on Scrippsiella trochoidea (Dinophyceae) cyst formation

Lundgren¹,

Granéli²

2011

Aquat. Microb. Ecol.

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We investigated whether or not the presence of copepods and different light conditions induced cyst formation in dinoflagellates. Scrippsiella trochoidea was exposed to Acartia tonsa directly and indirectly (grazer filtrate), in high light and low light conditions. The ingestion, faecal production and egg production of A. tonsa were compared between diets of S. trochoidea vegetative cells and temporary cysts. We found no effect of direct or indirect exposure to A. tonsa on S. trochoidea cyst formation in either high light or low light conditions. Controls and A. tonsa treatments kept in light displayed around 20% temporary cysts, whereas controls and A. tonsa treatments in low light were shown to have 50 to 80% temporary cysts. Thus, low light conditions had a strong effect on temporary cyst formation. No hypnocysts were observed in any experiment, which is probably related to the longer incubation times needed for their observation. Feeding on diets dominated by temporary cysts compared to vegetative cells decreased ingestion by a factor of 2.7, while faecal and egg production decreased by a factor of 2.2 and 2.9, respectively, suggesting that induction of temporary cysts in response to A. tonsa could be a survival strategy. However, S. trochoidea does not possess any grazer-induced defence in terms of temporary cyst formation, as it did not produce temporary cysts when exposed to A. tonsa. Rather, induction of temporary cysts seems to be controlled by decreased light intensity, which is a favorable trait for this species when driven to water depths where light is scarce.

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Tidal distortion caused by the resonance of sexta‐diurnal tides in a micromesotidal embayment

et al. 2016

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Double high water and double‐peak flood current were observed in Daya Bay (DYB), China, which is a shallow, mixed, mainly semidiurnal‐tide dominated bay with a micro to mesotidal range. Harmonic analysis reveals that the quarter and especially the sexta‐diurnal constituents are getting much stronger as tides propagating into the bay. The astronomical tides‐induced tidal asymmetry is yet dominant at the bay entrance but overtaken by the sexta‐diurnal tides at the end of the bay. Both the M4 and M6 tide meet the requirement proposed in previous studies but still unable to produce a double high water alone. Therefore, the conditions to produce a double high water between a fundamental tide and its higher harmonics need to be revisited. Analytical solutions were obtained in this paper, which fit the numerical solutions very well. Modeling result indicates M6 alone with M2 can produce the double high water in DYB but limited in some regions, while the combination of M2, M4, and M6 tides would enhance the capability. The amplification of sexta‐diurnal tides in DYB is dominated by resonance and followed by shoaling effect. Bottom friction damped M6 a lot and largely confined its amplification. However, the quadratic friction and other nonlinear processes are just responsible for about 10% of the total M6 increase.

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Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom

Cited by 74 publications

References 32 publications

Dinoflagellate cysts production in the north-western Adriatic Sea

Dinoflagellate cysts production in the north-western Adriatic Sea

Influence of altered light conditions and grazers on Scrippsiella trochoidea (Dinophyceae) cyst formation

Tidal distortion caused by the resonance of sexta‐diurnal tides in a micromesotidal embayment

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Cyst formation: an important mechanism for the termination of Scrippsiella trochoidea (Dinophyceae) bloom

Cited by 74 publications

References 32 publications

Dinoflagellate cysts production in the north-western Adriatic Sea

Dinoflagellate cysts production in the north-western Adriatic Sea

Influence of altered light conditions and grazers on Scrippsiella trochoidea (Dinophyceae) cyst ­formation

Tidal distortion caused by the resonance of sexta‐diurnal tides in a micromesotidal embayment

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Influence of altered light conditions and grazers on Scrippsiella trochoidea (Dinophyceae) cyst formation