Relationship of Spatial Phytoplankton Variability during Spring with Eutrophic Inshore and Oligotrophic Offshore Waters in the East Sea, Including Dokdo, Korea

Lee, Minji; Ro, Hyejoo; Kim, Yun-Bae; Park, Chan-Hong; Baek, Seung Ho

doi:10.3390/jmse9121455

Cited by 6 publications

(6 citation statements)

References 48 publications

(105 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Eutrophication and surface warming pose significant threats to marine ecosystems, as evidenced by multiple studies (Laurent et al, 2018;Deininger and Frigstad, 2019;Freeman et al, 2019;Wei et al, 2022). The influence of nutrients on the phytoplankton community is widely acknowledged (Irwin et al, 2006;Song et al, 2016;Cloern, 2018;Lee et al, 2021). The findings from the CCA and ABT analyses provide further confirmation that seasonal variation in the phytoplankton community are primarily driven by nutrient levels (Figures 6 and 7B).…”

Section: Nutrient Regime and Water Temperature Dynamics In The Smbmentioning

confidence: 54%

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Wang,

Huang

et al. 2023

Front. Mar. Sci.

View full text Add to dashboard Cite

In the context of global change, the stressors of warming and eutrophication have significant ecological implications in coastal waters. In order to examine the diversity of phytoplankton and its relationship with water quality, we conducted a survey of phytoplankton community compositions and their correlation with environmental changes over four seasons in a eutrophic bay located in the East China Sea. Through a systematic analysis, we identified diatoms and dinoflagellates as the primary dominant groups, with the species Skeletonema costatum, Skeletonema marinoi, Biddulphia sinensis, Thalassiosira eccentrica, Leptocylindrus danicus, Coscinodiscus oculus-iridis, Coscinodiscus jonesianus, and Chaetoceros knipowitschi as the most abundant species in all seasons. Significant seasonal alterations were observed in both environmental settings and phytoplankton species richness, dominance, and abundance. The phytoplankton community varied in its response to diverse aquatic environments and was principally affected by temperature, silicic acid concentrations, and suspended solids. Elevated temperatures were found to promote an increase in phytoplankton abundance. However, no clear evidence of diatom and dinoflagellate succession in relation to N:P ratio was observed across seasons. Water quality analysis illustrated that the majority of the study area exhibited a mid-eutrophic with severe organic pollution. The abundance of phytoplankton was significantly influenced by eutrophication and organic pollution. The accelerated warming process related to coastal nuclear power plants and nutrient regime alterations significantly affect the temporal shift of the phytoplankton community. These findings contribute valuable insights into the effects of eutrophic environments on the structure of phytoplankton communities in coastal aquatic systems.

show abstract

Section: Nutrient Regime and Water Temperature Dynamics In The Smbmentioning

confidence: 54%

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Wang,

Huang

et al. 2023

Front. Mar. Sci.

View full text Add to dashboard Cite

show abstract

“…was dominant in the whole water column (Figure 5), and this diatom positively correlated with nutrients in the PCA analysis (Figure 8). Lee et al [14] reported that Chaetoceros species, such as C. socialis, tend to thrive under low water temperatures when nutrients are abundant in the euphotic layers of the East Sea, Korea. Additionally, Thompson et al [3] and Lee et al [14] reported that the influx of abundant nutrients into the euphotic layers during winter mixing coincided with a high biomass and reproduction of diatoms.…”

Section: Discussionmentioning

confidence: 99%

“…Lee et al [14] reported that Chaetoceros species, such as C. socialis, tend to thrive under low water temperatures when nutrients are abundant in the euphotic layers of the East Sea, Korea. Additionally, Thompson et al [3] and Lee et al [14] reported that the influx of abundant nutrients into the euphotic layers during winter mixing coincided with a high biomass and reproduction of diatoms. In addition, the predominant of this diatom in winter led to a relatively lower diversity (H') in the whole water layer compared to other seasons (Figure 6).…”

Section: Discussionmentioning

confidence: 99%

“…In summer, the water column around Dokdo is generally stratified, and the resulting lack of surface nutrients leads to a low phytoplankton biomass [14,15]. However, in the summer of 2018, Chl.…”

Section: Discussionmentioning

confidence: 99%

“…However, the Ulleung Basin in the East Sea, where our study area of Dokdo (Island) is located, is influenced by a complex interplay of ocean currents, including the North Korean Cold Current (NKCC) flowing from the north, the East Korean Warm Current (EKWC) rising from the south, eddies near Ulleungdo (Island), and coastal upwelling around Ulleungdo and Dokdo [11,12] (Figure 1). This oceanographic complexity, through bottom-up processes, as well as the introduction of suspended organisms via currents around Dokdo, can cause changes in phytoplankton diversity as well as variations that differ from the seasonal successions of phytoplankton in typical-temperature seas [13,14]. With depths of 2000 m and a variety of currents, the East Sea is a small ocean that is well suited to understanding the response of phytoplankton to climate change trends.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Complex Oceanographic Features on Seasonal Phytoplankton Community and Biodiversity from 2018 to 2020 in the Vicinity of Dokdo (Island), Offshore Korea

Baek,

Lee,

Lee

et al. 2023

Diversity

Self Cite

View full text Add to dashboard Cite

Dokdo, a volcanic island located in offshore waters, is significantly influenced by various currents and the island effect resulting from upwelling events. Despite these factors, there is a limited understanding of the seasonal changes in phytoplankton populations and their relationship with the environmental factors in the waters around Dokdo, even during dramatic shifts in phytoplankton dynamics. We focused on seasonal oceanographic features over three years (2018, 2019, and 2020) to understand the phytoplankton community structure and seasonal species succession. Winter, characterized by thorough mixing, results in high nutrient levels, leading to increased phytoplankton biomass. The dominance of the large-sized diatom Chaetoceros spp. contributes to relatively low diversity (H’: 1.14 ± 0.31). In contrast to the typical coastal waters, spring exhibits dominance by the small nano-flagellates and Cryptomonas spp. associated with a lack of surface nutrients due to increased water temperature. Summer, characterized by strong stratification, shows low phytoplankton biomass but high Chl. a concentrations, possibly influenced by picoplankton and the emergence of dinoflagellates, such as Gyrodinium sp. and Katodinium sp., which increases diversity (H’: 2.18 ± 0.28). In autumn, there is typically a phytoplankton bloom, but in 2019, an unusually low biomass occurred. This was likely due to the intrusion of deep, cold water from the bottom and low-salinity Changjiang diluted water (CDW) from the surface, increasing the water’s stability. This, in turn, led to nutrient depletion, contributing to a rise in diversity (H’: 1.14 ± 0.31). These environmentally complex waters around Dokdo result in a distinct pattern of biodiversity indices, with the highest in summer and the lowest in winter, differing from typical temperate waters. In conclusion, this research highlights the substantial influence of distinctive oceanographic features and nutrient dynamics on the phytoplankton biomass and biodiversity in the Ulleung Basin and Dokdo region. Understanding these patterns is vital for the effective management of marine ecosystems and fisheries resources, emphasizing the necessity for continued long-term monitoring in the vicinity of the Dokdo area.

show abstract

Spatial Variability of Phytoplankton and Environmental Drivers in the Turbid Sanmen Bay (East China Sea)

Gao

Jiang

Chen

et al. 2022

Estuaries and Coasts

View full text Add to dashboard Cite

Relationship of Spatial Phytoplankton Variability during Spring with Eutrophic Inshore and Oligotrophic Offshore Waters in the East Sea, Including Dokdo, Korea

Cited by 6 publications

References 48 publications

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Impact of Complex Oceanographic Features on Seasonal Phytoplankton Community and Biodiversity from 2018 to 2020 in the Vicinity of Dokdo (Island), Offshore Korea

Spatial Variability of Phytoplankton and Environmental Drivers in the Turbid Sanmen Bay (East China Sea)

Contact Info

Product

Resources

About