Horizontal heterogeneity of microalgal biomass in the first-year sea ice of Saroma-ko Lagoon (Hokkaido, Japan)

Robineau, B.; Legendre, Louis; Kishino, Motoaki; Kudoh, Sakae

doi:10.1016/s0924-7963(96)00030-9

Cited by 33 publications

(26 citation statements)

References 28 publications

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“…D. confervacea occurred in the fjords over a narrow salinity range and did not grow in the experiments at 35 ‰. Although these results support previous laboratory experiments that show an optimal salinity range of 15 to 30 ‰ for D. confervacea (Smayda 1969), this species is sometimes associated with sea ice (Robineau et al 1997) which may contain brine-filled channels. Thus, poor growth of D. confer-vacea at 35 ‰ may be specific to some clones only.…”

Section: Influence Of Salinity On Vegetative Growth and Seasonal Micrsupporting

confidence: 81%

Influence of salinity on seasonal germination of resting stages and composition of microplankton on the Swedish west coast

McQuoid¹

2005

Mar. Ecol. Prog. Ser.

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Surface sediment from Gullmar Fjord, Sweden was cultured in the laboratory to assess the influence of different salinities on the germination of benthic resting stages and subsequent vegetative growth. Sediment cultures were grown in media with salinities of 15, 25, and 35 ‰ in both spring and summer conditions. Many microplankton species grew in the cultures. Dominant taxa were the diatoms Chaetoceros, Detonula, Skeletonema, and Thalassiosira, and the dinoflagellates Diplopsalis, Scrippsiella, and Oblea. Growth of T. minima and T. pseudonana after more than 2 yr of storage provides new evidence of a dormant stage in these species. Salinity significantly influenced germination only in D. confervacea and O. rotunda, but it showed significant effects on growth for all the dominant taxa. Salinity optima of the microplankton in the experiments were compared to salinity ranges of these species in fjords on the Swedish west coast. In the fjords, D. confervacea grows poorly at salinities > 27 ‰ and may be outcompeted by halotolerant species, such as C. socialis and T. minima. Because salinity is most variable in spring, a wide salinity tolerance is particularly advantageous during this season. The dominant dinoflagellates were well adapted to salinities between 22 and 35 ‰, and O. rotunda is favored at the high end of this range. Results illustrate how climaterelated changes in sea-surface salinity may alter the microplankton community on the Swedish west coast through direct effects on resting-stage germination and planktonic growth.

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Section: Influence Of Salinity On Vegetative Growth and Seasonal Micrsupporting

confidence: 81%

Influence of salinity on seasonal germination of resting stages and composition of microplankton on the Swedish west coast

McQuoid¹

2005

Mar. Ecol. Prog. Ser.

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“…The mean air temperature from the beginning of the freezing of the whole lagoon surface to the sampling day was lowest in 2012, although the freezing period of sea ice until the day of sampling was approximately 10 days shorter in 2010 and 2012 than in 2011 (Table 1). The snow coverage of 10 to 20 cm and ice thickness of 40 to 50 cm observed in the three years of this study (Table 2) were similar to values reported earlier in Saroma-Ko Lagoon (Robineau et al 1997, Shirasawa et al 2005. The temperatures of the sea water and sea ice were lowest at −1.7°C in 2012 ( Fig.…”

Section: Environmental Conditionssupporting

confidence: 90%

Photoacclimation strategy of ice algal community in the seasonal sea ice

Takimoto

Katayama

Taguchi

2017

Plankton Benthos Res

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Samples containing algal cells were collected from the bottom layers of sea-ice in Saroma-Ko Lagoon, Hokkaido, Japan in early spring 2010-2012. The physical and biogeochemical parameters of brine and sea ice, the structure of the ice algal community, and their photosynthetic characteristics were determined. Light responses of the relative electron transport rate (rETR) of the communities were estimated by quantum yield (ΔF/F m ′) of photosystem II at various light intensities with a pulse amplitude modulation (PAM) fluorometer. Although the compositions of the communities were different between the three years, their maximum quantum yields (F v /F m ) were well correlated to in situ light attenuation. In contrast, their light acclimation index (E k ), the ratios of maximum rETR to the efficiency of the relative electron transport (α), varied year by year. This suggests that the ice algal communities have effective lightharvesting capabilities and their photoacclimation strategy might be related to the structure of the community.

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“…Mean Chl a abundance in the pack ice of the Ross Sea (2.53 mg Chl a m −2 ) was lower than Chl a standing crops measured in other polar sea ice habitats, including Weddell Sea pack ice where mean spring‐summer values are about twice this level [ Dieckmann et al , 1998], first year sea ice in Saroma‐ko Lagoon, Japan (2–119 mg Chl a m −2 ) [ Kudoh et al , 1997; Robineau et al , 1997] and Resolute Passage, Canadian Arctic (3.7–160 mg Chl a m −2 [ Suzuki et al , 1997; Michel et al , 1996], and even some winter values reported for the Weddell and Scotia Seas (<0.01 to >29 mg Chl a m −2 ) [ Garrison and Close , 1993]. Chl a abundance in the Ross Sea pack ice was more than two orders of magnitude below the peak measured in the Ross Sea land‐fast ice [ Palmisano and Sullivan , 1983; Arrigo et al , 1995].…”

Section: Discussionmentioning

confidence: 99%

“…The scarcity of internal and surface ice communities in the Ross Sea pack was probably due to its relatively thin snow cover (Figure 5c) and to the fact that pack ice in the Ross Sea contains an unusually high proportion of congelation ice [ Jeffries and Adolphs , 1997], giving it greater similarity to land‐fast ice than to the pack ice habitats of the Weddell Sea. Like the Ross Sea ice pack, congelation ice habitats in the Arctic [ Smith et al , 1997; Michel et al , 1996], the Antarctic [ Palmisano and Sullivan , 1983; Arrigo et al , 1993; Robinson et al , 1995; Archer et al , 1996; Stoecker et al , 1997, 1998], and in Saroma‐ko Lagoon, Japan [ Robineau et al , 1997; Kudoh et al , 1997; Suzuki et al , 1997] also are generally dominated by bottom ice communities.…”

Section: Discussionmentioning

confidence: 99%

Physical control of chlorophyll a, POC, and TPN distributions in the pack ice of the Ross Sea, Antarctica

et al. 2003

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[1] The pack ice ecosystem of the Ross Sea was investigated along a 1470-km northsouth transect during the spring 1998 oceanographic program Research on OceanAtmosphere Variability and Ecosystem Response in the Ross Sea (ROAVERRS). Snow and sea ice thickness along the transect varied latitudinally, with thinner snow and ice at the northern ice edge and thin new ice in the vicinity of the Ross Sea polynya. Relative to springtime observations in other sea ice regions, algal chlorophyll a (Chl a) concentrations were low. In contrast, particulate organic carbon (POC), total particulate nitrogen (TPN), and POC:Chl a were all high, indicating either that the ice contained substantial amounts of detritus or nonphotosynthetic organisms, or that the algae had a high POC:Chl a ratio. The abundance of Chl a, POC, and TPN in the sea ice was related to ice age and thickness, as well as to snow depth: older ice had thinner snow cover and contained higher algal biomass while new ice in the polynya had lower biomass. Older pack ice was dominated by diatoms (particularly Fragilariopsis cylindrus) and had vertical distributions of Chl a, POC, and TPN that were related to salinity, with higher biomass at the ice-water interface. Fluorescence-based measurements of photosynthetic competence (Fv/Fm) were higher at ice-water interfaces, and photosynthesis-irradiance characteristics measured for bottom ice algae were comparable to those measured in pack ice communities of other regions. Nutrient concentrations in extracted sea ice brines showed depletion of silicate and nitrate, depletion or regeneration of phosphate and nitrite, and production of ammonium when normalized to seawater salinity; however, concentrations of dissolved inorganic nitrogen, phosphorous, and silica were typically above levels likely to limit algal growth. In areas where pack ice and snow cover were thickest, light levels could be limiting to algal photosynthesis. Enrichment of d 13 C-POC in the sea ice was correlated with the accumulation of POC, suggesting that carbon sources for photosynthesis might shift in response to decreasing CO 2 supply. Comparisons between new ice and underlying waters showed similar algal species dominance (Phaeocystis antarctica) implying incorporation of phytoplankton, with substantially higher POC and TPN concentrations in the ice.

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Horizontal heterogeneity of microalgal biomass in the first-year sea ice of Saroma-ko Lagoon (Hokkaido, Japan)

Cited by 33 publications

References 28 publications

Influence of salinity on seasonal germination of resting stages and composition of microplankton on the Swedish west coast

Influence of salinity on seasonal germination of resting stages and composition of microplankton on the Swedish west coast

Photoacclimation strategy of ice algal community in the seasonal sea ice

Physical control of chlorophyll a, POC, and TPN distributions in the pack ice of the Ross Sea, Antarctica

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