Production of mycosporine-like amino acids of in situ phytoplankton community in Kongsfjorden, Svalbard, Arctic

Ha, Sung Yong; Kim, Young Nam; Park, Mi-Ok; Kang, Sung‐Ho; Kim, Hyun Cheol; Shin, Kyung‐Hoon

doi:10.1016/j.jphotobiol.2012.03.011

Cited by 22 publications

(28 citation statements)

References 78 publications

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“…Also, the higher S 275-295 values point to higher exposure in the fjord (see above). This is consistent with Ha et al [2012] who investigated MAAs produced by phytoplankton in response to UV exposure. [Řezanka et al, 2004], and we surmise that they could account for the primary absorption peak at 360 nm in both fjord and mesocosms.…”

Section: 1002/2013jg002587supporting

confidence: 90%

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels

et al. 2014

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A large-scale multidisciplinary mesocosm experiment in an Arctic fjord (Kongsfjorden, Svalbard; 78°56.2′N) was used to study Arctic marine food webs and biogeochemical elements cycling at natural and elevated future carbon dioxide (CO 2 ) levels. At the start of the experiment, marine-derived chromophoric dissolved organic matter (CDOM) dominated the CDOM pool. Thus, this experiment constituted a convenient case to study production of autochthonous CDOM, which is typically masked by high levels of CDOM of terrestrial origin in the Arctic Ocean proper. CDOM accumulated during the experiment in line with an increase in bacterial abundance; however, no response was observed to increased pCO 2 levels. Changes in CDOM absorption spectral slopes indicate that bacteria were most likely responsible for the observed CDOM dynamics. Distinct absorption peaks (at~330 and~360 nm) were likely associated with mycosporine-like amino acids (MAAs). Due to the experimental setup, MAAs were produced in absence of ultraviolet exposure providing evidence for MAAs to be considered as multipurpose metabolites rather than simple photoprotective compounds. We showed that a small increase in CDOM during the experiment made it a major contributor to total absorption in a range of photosynthetically active radiation (PAR, 400-700 nm) and, therefore, is important for spectral light availability and may be important for photosynthesis and phytoplankton groups composition in a rapidly changing Arctic marine ecosystem.

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Section: 1002/2013jg002587supporting

confidence: 90%

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels

et al. 2014

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“…The 3 MAAs, shinorine, palythine and porphyra-334, identified in the ice-covered water column and underice melt layer in this study, have all been previously reported in polar waters (Karentz et al 1991, Whitehead et al 2001, Ryan et al 2002, Ha et al 2012. Of particular relevance to this study in the Arctic Ocean is Ha et al (2012), which detected 5 MAAs in phytoplankton samples collected near Svalbard, namely shinorine, palythine, porphyra-334, asterina-330 and mycosporine-glycine.…”

Section: Identity Of Maas In Ice-covered Environmentssupporting

confidence: 84%

“…In contrast, there was no conclusive evidence of asterina-330 and mycosporine-glycine in any of our samples. An other UVAC, U1 (most likely palythene), was found to be present in our water column and under-water melt layer samples but was not reported in Ha et al (2012). Similarly, while shinorine, palythine and porphyra-334 were detected in the sea ice of the Baltic Sea (Uusikivi et al 2010, Piiparinen et al 2015, only shinorine and porphyra-334 were identified in our bottom sea ice samples.…”

Section: Identity Of Maas In Ice-covered Environmentssupporting

confidence: 41%

“…Of particular relevance to this study in the Arctic Ocean is Ha et al (2012), which detected 5 MAAs in phytoplankton samples collected near Svalbard, namely shinorine, palythine, porphyra-334, asterina-330 and mycosporine-glycine. In contrast, there was no conclusive evidence of asterina-330 and mycosporine-glycine in any of our samples.…”

Section: Identity Of Maas In Ice-covered Environmentsmentioning

confidence: 99%

“…The difference between these studies could be due to the exposure of the surface community to greater light intensity in the studies of Uusikivi et al (2010) and Piiparinen et al (2015). MAAs were also measured in phytoplankton communities in spring near the ice edge along the Svalbard coast of the Arctic Ocean, though their concentrations were lower than those in open water away from the ice margin (Ha et al 2012).…”

Section: Introductionmentioning

confidence: 98%

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Spring production of mycosporine-like amino acids and other UV-absorbing compounds in sea ice-associated algae communities in the Canadian Arctic

Elliott¹,

Mundy²,

Gosselin³

et al. 2015

Mar. Ecol. Prog. Ser.

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Marine phytoplankton are known to produce mycosporine-like amino acids (MAAs) for protection against UV radiation. To assess whether the same strategy applies to sea ice-associated communities, MAAs were measured in algal communities associated with surface melt ponds, sea ice (bottom 3 cm), sea ice−water interface below melt ponds, and underlying seawater in a coastal bay of the Canadian Arctic Archipelago during the spring melt transition from snowcovered to melt pond-covered sea ice. Six UV-absorbing compounds (UVACs) were detected as the spring melt progressed, 3 of which are identified to be shinorine, palythine, and porphyra-334. A fourth UVAC (U1) is most likely palythene. The molecular identities of the other 2 UVACs, U2 and U3, which have an absorption maximum of 363 and 300 nm, respectively, remain to be structurally elucidated. The highest UVAC nominal concentrations were observed in the 3 cm bottom ice under thin snow-covered sites just prior to complete snowmelt. Normalization to chlorophyll a content revealed that the greatest contribution to UV absorption from biota was associated with melt ponds that are exposed to the highest light intensity. These results confirm that Arctic sea ice-associated communities are capable of producing photoprotectants and that spatial and temporal variations in MAA and other UVAC synthesis are affected by snow cover and UV radiation exposure.

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Ultraviolet radiation enhances Arctic net plankton community production

Garcia-Corral

Agustı́

Regaudie-de-Gioux

et al. 2014

Geophysical Research Letters

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In this study we report the response of net community production (NCP) of plankton communities in the Arctic surface waters exposure to natural ultraviolet radiation (UVR) conditions. A possible bias in previous measurements performed using borosilicate glass bottles (opaque to most UVR) can underestimate NCP. Here we show that 77% of the sampled communities suffer, on average, 38.5% of net increase in NCP when exposed to natural UV-B condition, relative to values when UV-B radiation is excluded. UV-B tends to shift communities toward autotrophy, with the most autotrophic communities responding the strongest. This is likely explained by the inhibition of bacterial respiration during the continuous day period of the Arctic summer, corroborated by experiments where bacterial production influenced by UV-B directly affect NCP. Whereas Arctic warming is expected to lead to lower NCP, our results show that increased UV-B radiation may partially compensate this negative effect in surface waters.

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Production of mycosporine-like amino acids of in situ phytoplankton community in Kongsfjorden, Svalbard, Arctic

Cited by 22 publications

References 78 publications

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels

Spring production of mycosporine-like amino acids and other UV-absorbing compounds in sea ice-associated algae communities in the Canadian Arctic

Ultraviolet radiation enhances Arctic net plankton community production

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Production of mycosporine-like amino acids of in situ phytoplankton community in Kongsfjorden, Svalbard, Arctic

Cited by 22 publications

References 78 publications

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2 levels

Spring production of mycosporine-like amino acids and other UV-absorbing compounds in sea ice-associated algae communities in the Canadian Arctic

Ultraviolet radiation enhances Arctic net plankton community production

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Product

Resources

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Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels

Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO₂ levels