Relationship between Distribution of the Dominant Phytoplankton Species and Water Temperature in the Nakdong River, Korea.

Yu, Jae Jeong; Lee, Hye Jin; Lee, Kyung-Lak; Lyu, Heuy Seong; Whang, Jeong Wha; Shin, La Young; Chen, Se Uk

doi:10.11614/ksl.2014.47.4.247

Cited by 15 publications

(6 citation statements)

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“…Blooms of Aulacoseira spp. have been reported to occur in summer in the Murray River in Australia, in the Pearl River in China, and in the Seomjin, Nakdong, and Youngsan rivers in Korea [51][52][53][54]. Based on the CCA results, salinity was negatively correlated with the nitrate+nitrite and silicate concentrations, but there were no significant relationships with other environmental factors ( Figure 5B).…”

Section: Phytoplankton Population Dynamics In the Srementioning

confidence: 99%

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

2020

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The distribution of microalgal species in estuaries shows marked gradients because of the mixing of marine and fresh water during tidal exchanges. To assess the spatio-temporal distribution of phytoplankton in the Seomjin River estuary (SRE), Korea, we investigated the seasonal phytoplankton communities along a salinity gradient in the estuary using both high performance liquid chromatography (HPLC) pigment analysis and light microscopy. Both types of analysis indicated that marine planktonic diatoms generally dominated at downstream sites having salinities >10, whereas freshwater species dominated at upstream sites having salinities <5. High levels of the pigments fucoxanthin and alloxanthin were found at upstream sites in the SRE in late spring. During summer, relatively high levels of the pigment peridinin were present in downstream areas of the SRE, and relatively high levels of diatoms occurred in upstream areas. In autumn, small Cryptomonas species were found in high abundance based on microscopic analysis, while CHEMTAX analysis of photosynthetic pigments showed relatively high concentrations of the diatom pigment fucoxanthin, implying the co-occurrence of a small unidentified phytoplankton. During winter, when the estuarine waters were well mixed, both the microscopic and CHEMTAX analyses showed that diatoms dominated at most stations. Seasonal and horizontal gradients in environmental conditions were clearly influenced by the salinity and nutrient loadings, especially the nitrate+nitrite and silicate concentrations. In particular, the ratio of photoprotective carotenoid pigments (PPCs) to photosynthetic carotenoid pigments (PSCs) was relatively low during all four seasons. This was predominately because of the high productivity of diatoms, which have a very low ratio of PPCs to PPSs. The SRE is a favorable habitat for diatoms because it is a high turbulence area having rapid water movement as a result of tidal changes. Overall, there was consistency in the data derived from the microscopy and chemotaxonomy analyses, suggesting that both methods are useful for analysis of the phytoplankton community structure in this complex estuarine and coastal water ecosystem.

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Section: Phytoplankton Population Dynamics In the Srementioning

confidence: 99%

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

2020

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“…and Anabeana spp. and the major component of the water bloom in the Nakdong River (Park et al 2015;Yu et al 2014). Whereas Aph.…”

Section: Resultsmentioning

confidence: 99%

“…In the Nakdong River, Microcystis and Anabaena have been considered as the representative bloom-forming cyanobacteria genera (Yu et al 2014). After the construction of eight weirs, the number of its bloom has been recently growing in mid-upperstream (Ryu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…issatschenkoi) have been described until a recent date (Park 2004) in South Korea; only one Aphanizomenon species has been reported in the ecological study of Nakdong River: Aph. flos-aquae (Choi et al 2007;Yu et al 2014). Recent studies using polyphasic approach, e.g., involving morphology but also ecology and phylogenetics, have revealed that the genus Apohanizomenon is in reality very heterogeneous (Cirés and Ballot 2016).…”

Section: Introductionmentioning

confidence: 99%

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Morphology and taxonomy of the Aphanizomenon spp. (Cyanophyceae) and related species in the Nakdong River, South Korea

2016

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Background: The purpose of this study is to describe the morphological characteristics of the Aphanizomenon spp. and related species from the natural samples collected in the Nakdong River of South Korea. Aph. flos-aquae was similar to Aph. klebahnii, whereas these species differed from each other by the size and shape of fascicles, which was macroscopic in Aph. flos-aquae and microscopic in the Aph. klebahnii. One of their characteristics was that trichomes are easily disintegrating during microscopic examination. C. issatschenkoi could be clearly distinguished from other species by hair-shaped terminal cell. Its terminal cell was almost hyaline and markedly pointed. Young populations of the species without heterocytes run a risk of a misidentification. Aph. skujae was characterized by akinete. Morphological variability of akinetes from natural samples collected in the Nakdong River was rather smaller than those reported by previous study. Conclusions: C. issatschenkoi are described for the first time in the Nakdong River. In addition, Aph. klebahnii and Aph. skujae are new to South Korea.

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“…상주보가 위치한 낙동강 상류 수역은 낙동 강에 위치한 보 구간 수역 중에 비교적 수질이 양호하고, 수환경이 청정한 것으로 알려져 있다 (NRERC, 2014). 낙동 강에서 식물플랑크톤의 종조성 및 군집구조, 녹조현상에 대 한 연구는 주로 중 하류를 중심으로 이루어져왔으며 (Park et al, 2015;Son, 2013;Yu et al, 2014), 상류수역에서의 식물플랑크톤 특히 녹조현상 유발 남조류를 중심으로 한 연구는 매우 미비한 실정이다 (Hur et al, 2013). 녹조현상을 유발하는 남조류의 발생과 천이, 감소의 원리 에 대한 이해는 남조류에 의한 녹조현상을 관리하는 측면 에서 필수적이라 할 수 있다 (Ma et al, 2015 Fig.…”

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Occurrence and Succession Pattern of Cyanobacteria in the Upper Region of the Nakdong River : Factors Influencing Aphanizomenon Bloom

Ryu¹,

Park²,

Lee³

et al. 2016

Journal of Korean Society on Water Environment

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Relationship between Distribution of the Dominant Phytoplankton Species and Water Temperature in the Nakdong River, Korea.

Cited by 15 publications

References 0 publications

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

Comparison of HPLC Pigment Analysis and Microscopy in Phytoplankton Assessment in the Seomjin River Estuary, Korea

Morphology and taxonomy of the Aphanizomenon spp. (Cyanophyceae) and related species in the Nakdong River, South Korea

Occurrence and Succession Pattern of Cyanobacteria in the Upper Region of the Nakdong River : Factors Influencing Aphanizomenon Bloom

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