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Kim, Sang Woo; Saitoh, Sei–Ichi; Ishizaka, Joji; Isoda, Yutaka; Kishino, Motoaki

doi:10.1023/a:1011148910779

Cited by 86 publications

(15 citation statements)

References 17 publications

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“…This seasonal variation in the biomolecular composition could be explained by the seasonal cycle of phytoplankton biomass and bloom. Typically, the East/ Japan Sea has a bimodal pattern of spring and autumn blooms (Vinogradov et al, 1996;Kim et al, 2000;Choi et al, 2016).…”

Section: Seasonal Variation In the Biomolecular Composition Of Pommentioning

confidence: 99%

Seasonal variations in biochemical (biomolecular and amino acid) compositions and protein quality of particulate organic matter in the Southwestern East/Japan Sea

Youn²,

Joo³

et al. 2022

Front. Mar. Sci.

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The biochemical compositions of marine particulate organic matter (POM) can provide significant information to understanding the physiological conditions of phytoplankton and food quality for their potential consumers. We investigated the seasonal variations in biomolecular and amino acid (AA) compositions of the bulk POM in the southwestern East/Japan Sea from four different sampling months (February, April, August, and October) in 2018. In terms of the biomolecular composition of the POM, overall carbohydrates (CHO) were predominant among three biomolecules accounting for 48.6% followed by lipids (LIP; 35.5%) and proteins (PRT; 15.9%) in the East/Japan Sea. However, markedly seasonal differences in the biomolecular composition of POM were found from February to October, which could be due to seasonally different conditions favorable to phytoplankton growth. Dominant AA constituents to trace POM lability were glycine (GLY), alanine (ALA), and glutamic acid (GLU), suggesting that our POM was the mixtures of decomposing and fresher materials. Furthermore, the significantly negative correlation between the proportion of total essential amino acids (EAAs) and PRT composition (r = -0.627, p< 0.01) was probably reflected by nutrient availability to phytoplankton partitioning EAAs or non-essential AAs (NEAAs). The different biomolecular compounds under un- or favorable growth conditions for phytoplankton could determine the nutritional quality of POM as potential prey as well as degradation status of POM. Therefore, the biochemical compositions of phytoplankton-originated POM hold important ecological implications in various marine ecosystems under ongoing climate changes.

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Section: Seasonal Variation In the Biomolecular Composition Of Pommentioning

confidence: 99%

Seasonal variations in biochemical (biomolecular and amino acid) compositions and protein quality of particulate organic matter in the Southwestern East/Japan Sea

Youn²,

Joo³

et al. 2022

Front. Mar. Sci.

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“…Previous investigations have revealed bimodal phytoplankton concentrations blooms occurring in spring and fall. These blooms can be explained by the critical depth hypothesis, which emphasizes the roles of sea surface wind speeds and temperatures (Chiswell et al 2013;Kim et al, 2000;Kim et al 2007;Taylor and Ferrari, 2011;Yamada et al, 2004). In this study, we revisit the spring and fall phytoplankton blooms and their mechanisms based on a newly released high-resolution satellite-derived SSC product.…”

Section: Discussionmentioning

confidence: 99%

“…where I0 is the PAR (E m -2 d -1 ) and k denotes the attenuation coefficient of PAR. The compensation light intensity Ic is taken as 3.8 E m -2 d -1 (Kim et al, 2000).…”

Section: Methodsmentioning

confidence: 99%

“…This time bias might be caused by the value of the Ic, as the temporal variations of Ic, of 6.3 E m -2 d -1 during spring and 1.4 E m -2 d -1 during fall, is not considered in the calculation of CRD (Kim et al, 2000). Thus, the Sverdrup hypothesis (Sverdrup, 1953) is basically applicable to explain the bloom initiation in the JES, indicating that the variations in the JES SSCs are mainly governed by the physical environmental conditions.…”

Section: Seasonal Variability Of Bloom Magnitudementioning

confidence: 99%

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Satellite-detected sea surface chlorophyll-a blooms in the Japan/East Sea: magnitude and timing

Wang

Fang²,

Jiang³

et al. 2022

Preprint

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Abstract. The Japan/East Sea (JES) is known as a mid-latitude “Miniature Ocean” that features multiscale oceanic dynamics processes. We investigate the variability of the sea surface chlorophyll-a concentration (SSC) and bloom timing in the JES based on satellite remote sensing products spanning 1998–2019. The JES SSC exhibits strong seasonal variability and blooms twice annually, which are mainly governed by the physical environmental conditions. However, the influences of local oceanic dynamic processes (e.g., upwelling, oceanic fronts, mesoscale eddies, and near-inertial oscillations) on the bloom magnitude and timing of the entire JES are not critical, compared with the PAT and stratification. In addition, significant interannual variabilities of spring bloom magnitude occur along the JES's northwestern coast, and that of fall bloom magnitude occur in the deep Japan Basin. For spring bloom, the interannual variability of the bloom timing (initiation timing, termination timing and duration), which significantly affect the interannual bloom magnitude anomalies, are correlated with climate modes such as AO and ENSO. For fall bloom, on the interannual time scale, the bloom duration is mainly affected by the initiation timing. Both of them have a significant influence on the bloom magnitude. The initiation/termination timing of spring blooms has shifted earlier by 0.37/0.45 days annually along the JES's northwestern coast; the counterpart of fall blooms has shifted 0.49/1.28 days earlier annually in the deep Japan Basin.

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“…In the Sea of Japan (the Japan Sea, Figure 1), which is a semiclosed marginal sea of the western North Pacific, where seasonal phytoplankton blooms occur (a major spring and minor autumn blooms) (Kim, Saitoh, Ishizaka, Isoda, & Kishino, 2000;Kim, Yoo, & Oh, 2007;Onitsuka & Yanagi, 2005;Onitsuka, Yanagi, & Yoon, 2007;Park, Kang, Kim, & Park, 2014;Yamada, Ishizaka, Yoo, Kim, & Chiba, 2004;Yanagi, Onitsuka, Hirose, & Yoon, 2001), the Japanese sardine stock displays a high level of temporal variation (Figure 2).…”

mentioning

confidence: 99%

Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan

Kodama

Wagawa

Ohshimo

et al. 2018

Fisheries Oceanography

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To evaluate the impact of temporal variation of primary productivity on the recruitment of Japanese sardine (Sardinops melanostictus) in the Sea of Japan, the phenology of sea surface phytoplankton abundance was estimated from 8 day multiple satellite (SeaWiFS, MODIS‐Aqua, MERIS, and VIIRS) derived sea surface chlorophyll (SSChl) a concentrations from January 1998 to December 2015. Because relationships between SSChl a and in situ chlorophyll a concentrations were significantly different among periods based on the satellite combinations used, maximum and minimum SSChl a concentrations of 1 year were relativized as 1 and 0, respectively. Spatio‐temporal variation of relativized SSChl a concentrations was determined by using empirical orthogonal function (EOF) analysis. Scores in the first EOF mode denoted the basin‐scale variations of SSChl a concentrations in the Sea of Japan, and the major peak from the end of February to the end of May displayed the spring bloom. The logarithm of recruitment per spawner (LNRPS) for sardine was positively affected by delays in the start and end dates of the spring phytoplankton bloom. The delay of the date of the lowest sea surface temperature contributed to the delay of the end of the spring bloom during the period 1998–2015 and elevated the LNRPS during the period 1982–2015. Sardine spawns in the southern Sea of Japan from April to May, hence, delays of the spring bloom prolonged its overlap with sardine larval periods, and thus improved the recruitment of Japanese sardine in the Sea of Japan.

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Cited by 86 publications

References 17 publications

Seasonal variations in biochemical (biomolecular and amino acid) compositions and protein quality of particulate organic matter in the Southwestern East/Japan Sea

Seasonal variations in biochemical (biomolecular and amino acid) compositions and protein quality of particulate organic matter in the Southwestern East/Japan Sea

Satellite-detected sea surface chlorophyll-a blooms in the Japan/East Sea: magnitude and timing

Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan

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