Abundance and germination capability of resting cysts of Alexandrium spp. (Dinophyceae) from faecal pellets of macrobenthic organisms

Tsujino, Mutsumi; Kamiyama, Takashi; Uchida, T.; Yamaguchi, Mineo; Itakura, Shigeru

doi:10.1016/s0022-0981(02)00024-2

Cited by 20 publications

(7 citation statements)

References 12 publications

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“…Although meso- and micro-zooplankton suspension feeders appear to ingest Alexandrium cells in essentially similar proportion to its abundance as an available food item, selective exclusion of the slightly larger 40–50 μm-sized cysts may occur (Bolch et al, 1991; Turriff et al, 1995; Anderson, 1997, 1998; Turner et al, 2000; Doucette et al, 2005; Turner and Borkman, 2005; Turner et al, 2005). Macrobenthic suspension feeders produce fecal pellets containing cysts (Tsujino et al, 2002; Persson et al, 2006) but no quantitative information exists on the occurrence of Alexandrium cysts in planktonic zooplankton fecal pellets.…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Pilskaln

Anderson

McGillicuddy

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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Quantification of Alexandrium cyst fluxes through the Gulf of Maine water column is central to understanding the linkage between the source and fate of annual Alexandrium blooms in the offshore waters. These blooms often lead to paralytic shellfish poisoning (PSP) and extensive closures of shellfish beds. We report here on time-series sediment trap deployments completed at four offshore locations in the gulf between 2005 and 2010 as components of two ECOHAB–GOM field programs. Data presented documents the substantial spatial and temporal fluctuations in Alexandrium fundyense cyst fluxes in the gulf. Cyst delivery out of the euphotic zone peaked primarily between July and August following annual spring–summer Alexandrium blooms and was greatest in the western gulf. At all sites, cyst flux maxima to the subsurface waters were rarely coincident with seasonal peaks in the total mass export of particulate material indicating that cyst delivery was primarily via individually sinking cysts. Where persistent benthic nepheloid layers (BNLs) exist, significant sediment resuspension input of cysts to the near-bottom water column was evidenced by deep cyst fluxes that were up to several orders of magnitude greater than that measured above the BNL. The largest cyst fluxes in the BNL were observed in the eastern gulf, suggesting greater resuspension energy and BNL cyst inventories in this region. Temporal similarities between peak cyst export out of the upper ocean and peak cyst fluxes in the BNL were observed and document the contribution of seasonal, newly formed cysts to the BNL. The data however also suggest that many Alexandrium cells comprising the massive, short-lived blooms do not transition into cysts. Time-series flow measurements and a simple 1D model demonstrate that the BNL cyst fluxes reflect the combined effects of tidal energy-maintained resuspension, deposition, and input of cysts from the overlying water column.

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Section: Discussionmentioning

confidence: 99%

Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Pilskaln

Anderson

McGillicuddy

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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“…Our results showed that resting cysts density decreased rapidly with sediment depth. Such vertical profile pattern (Erard-Le-Denn et al, 1993;Garcés et al, 2004;Wang et al, 2004b) may reflect the influence of macro benthic organisms on resting cysts distribution (Tsujino et al, 2002) linked to biodiffusive bioturbation mode (François et al, 1999). Resting cysts occurrence down to 18 cm has been reported by Wang et al (2004a).…”

Section: Discussionmentioning

confidence: 94%

“…More recently, investigators sampled 3 sediment cores for each studied station (Kremp, 2000;Kim et al, 2002;Irwin et al, 2003;Pospelova et al, 2004). Tsujino et al (2002) sampled even up to 6 sediment cores. Other investigators (Marret and Scourse, 2002;McQuoid et al, 2002;Harland et al, 2004) used sampling methods which allowed to sample simultaneously several sediment cores (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Towards an optimal sampling strategy for Alexandrium catenella (Dinophyceae) benthic resting cysts

et al. 2007

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The study proposes methodological developments to optimize sampling strategy of resting cysts of Alexandrium catenella to estimate their abundance with a predefined error. This work also aims to provide information on spatial distribution of resting cysts in sediments. The distribution mode of A. catenella resting cysts related to the abundance variability was studied through sediment cores sampling on four different spatial scales and using Ludox CLX gradient density method. The quantification method underestimates by a factor of 2 the resting cysts abundance in one gram of sediment. Application of Taylor's power law allowed us to define a compromise between sampling effort and abundance estimation error. In the case of A. catenella resting cysts from Thau lagoon, the optimal sampling strategy consists of sampling 10 stations on a surface of 2 km 2 for a given coefficient of variability (C) of 15%, sampling 3 sediment cores at each station (C = 30%) and counting only one replicate by core (C = 18%). Results related to the application of Taylor's power law are closely dependent on resting cyst density and aggregation in a given sediment. In our area, A. catenella resting cysts are mainly observed in the upper 3 cm of sediment. Horizontally, their heterogeneity is lower on 10 cm 2 surface and tends to stabilize itself beyond a surface of 10 m 2 . Each author has to carry out this pre-sampling effort for his own resting cysts-forming species, in his own area, in order to increase accuracy of resting cyst mapping. #

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“…For these genera, retention of their viability is more important than their cells turning into a complete resting stage in shallow water where the sediment is easily resuspend ed. The resulting divergent distribution both in the water column and on the bottom may disperse grazing pressure by zooplanktons and benthos (Tsujino et al, 2002;Montreso et al, 2003). This life strategy results in their dominancy in the bay.…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation in abundance and species composition of a planktonic diatom assemblage including viable cells on the bottom in matsushima bay, northeastern japan

Ichinomiya

Taniguchi

2003

J Ocean Univ. China

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Seasonal variation in abundance and species composition of a planktonic diatom assemblage distributed in the water column and also settled on the bottom was investigated for the shallow coastal water in Matsushima Bay on the Pacific coast of northeastern Japan during the period from October 1999 to September 2000. A spring bloom of diatoms began in April when nutrient concentrations started to increase, indicating the importance of nutrients. Viable cells of SkeIetonema costatum and Thalassiosira spp., 'which were the dominant species in the water column throughout the year, were also always abundant in the bottom sediment. Both populations in the water column and on the bottom fluctuated essentially in parallel. For the planktonic diatoms in shallow coastal waters to maintain their vegetative populations in the water column, it would be advantageous for them to have a seeding population of viable cells on the bottom that are easily resuspended into the upper photic layer.

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Abundance and germination capability of resting cysts of Alexandrium spp. (Dinophyceae) from faecal pellets of macrobenthic organisms

Cited by 20 publications

References 12 publications

Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Spatial and temporal variability of Alexandrium cyst fluxes in the Gulf of Maine: Relationship to seasonal particle export and resuspension

Towards an optimal sampling strategy for Alexandrium catenella (Dinophyceae) benthic resting cysts

Seasonal variation in abundance and species composition of a planktonic diatom assemblage including viable cells on the bottom in matsushima bay, northeastern japan

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