Seasonal variation in the net growth rate of the cyanobacterium Cylindrospermopsis raciborskii in a shallow artificial pond in northern Taiwan

Yamamoto, Yoshimasa; Shiah, Fuh‐Kwo; Hsu, Shih-Chieh

doi:10.3800/pbr.8.68

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…The result suggested that the high water temperature may play a key role in regulating the presence of R. raciborskii in Ea Nhai reservoir. Similar results were found in previous studies [38][39][40]. So far, R. raciborskii has successfully invaded many regions from tropical and subtropical towards temperate zones.…”

Section: Concentrations Of Cylindrospermopsinsupporting

confidence: 91%

Population Dynamics of <i>Raphidiopsis raciborskii</i> and Cylindrospermopsin Concentration in Ea Nhai Reservoir in Dak Lak Province, Vietnam

Ngo¹,

Doan²,

Ton³

et al. 2022

Pol. J. Environ. Stud.

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Raphidiopsis raciborskii is a globally distributed bloom-forming cyanobacterium and produces toxin cylindrospermopsin (CYN), which results in public and environmental health consequences. piece of evidence To understand their blooming dynamics and to identify the environmental factors that determine their success in the tropical reservoir, a monthly monitoring program was conducted from May 2019 to April 2020. Variations in phytoplankton communities, environmental parameters (temperature, pH, dissolved oxygen, turbidity, dissolved inorganic nutrients) and CYN were simultaneously determined from a total of 36 samples in the Ea Nhai reservoir in Vietnam. The phytoplankton is composed of a dominant cyanobacteria community formed mainly by filamentous R. raciborskii with the biovolume of up to 66.8 mm 3 L -1 . PCA and Pearson correlation results showed the biovolume and variation of R. raciborskii in the Ea Nhai reservoir were mainly related to temperature and nutrients (N-NH 4 , P-PO 4 , TP, TN). Analysis of the toxins by ELISA demonstrated the presence of CYN in all water samples with an average value of 1.24 µg L -1 and it was significantly correlated with the biovolume of the invasive species R. raciborskii. The results of the HPLC analysis confirmed the production of CYN in nine isolated Raphidiopsis strains with concentrations ranging from 0.

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Section: Concentrations Of Cylindrospermopsinsupporting

confidence: 91%

Population Dynamics of <i>Raphidiopsis raciborskii</i> and Cylindrospermopsin Concentration in Ea Nhai Reservoir in Dak Lak Province, Vietnam

Ngo¹,

Doan²,

Ton³

et al. 2022

Pol. J. Environ. Stud.

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“…4), implying that the rapid decline in the abundance in late July 2011 occurred in the middle of the formation of a bloom. Rainfall is a factor that can rapidly -although often only temporarily -reduce the abundance of C. raciborskii during the growing season (Yamamoto et al, 2013). However, no strong rainfall was recorded from mid-to late July 2011 in Taipei (Central Weather Bureau, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…In Taiwan, C. raciborskii is widely distributed in eutrophic ponds (Yamamoto et al, 2011). Surveys of a pond in northern Taiwan have demonstrated that C. raciborskii exhibits typical seasonal dynamics, with a low population density in winter and dominating in summer (Yamamoto and Shiah, 2012;Yamamoto et al, 2013). However, extended monitoring has shown that C. raciborskii sometimes exhibits atypical seasonal dynamics.…”

Section: Introductionmentioning

confidence: 99%

Appearance ofCylindrospermopsis raciborskiiin winter in an artificial pond in northern Taiwan

Yamamoto

Shiah

2016

Ann. Limnol. - Int. J. Lim.

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The seasonal dynamics of Cylindrospermopsis raciborskii was investigated from June 2011 to December 2013 in a small artificial pond in northern Taiwan. The abundance of C. raciborskii increased from late February to early April 2012 when the water temperature ranged from 16.4 to 21.7 xC and from mid-August 2012 to mid-February 2013 as the water temperature decreased from about 27 xC to below 20 xC; it peaked in mid-February 2013 when the water temperature was 16.3 xC. In the summer months, the abundance of C. raciborskii was very low and sometimes undetectable. A laboratory experiment using a strain that was isolated from the pond suggested that the dominance of C. raciborskii in low-temperature seasons could be attributed to its tolerance of, not preference for, low temperatures. Contrary to the results of this study, our earlier survey conducted in the same pond from August 2009 to January 2011 showed that the abundance of C. raciborskii was low in winter and increased in summer. Environmental changes in the study pond and/or the appearance of a different ecotype was assumed to be responsible for the change in the dynamics of C. raciborskii.

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“…In pelagic region of typical dimictic lakes with large water surface area, seasonal variations in phytoplankton abundance of the surface water are relatively predictable and mainly affected by water temperature and nutrient supply in the water column by seasonal vertical mixing. On the other hand, water retention time or water exchange rate become more important factors in water systems with highly susceptible to variable influent quantities such as small lakes and ponds, upstreams of river-mouth dams, and riverine and transitional zones of reservoirs (e.g., Thornton et al 1990;Hodoki and Murakami 2007;Yamamoto et al 2013). Lake Hira is small and shallow, and previous study also showed that nutrients (DIP and DIN) are usually remaining in the water (Mitamura et al 2014) and seem not to become limiting factors for phytoplankton growth.…”

Section: Discussionmentioning

confidence: 99%

Identification of species and genotypic compositions of Cryptomonas (Cryptophyceae) populations in the eutrophic Lake Hira, Japan, using single-cell PCR

et al. 2015

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Single-cell PCR and gene sequencing were conducted to evaluate species and genotypic compositions of Cryptomonas in the eutrophic Lake Hira, Japan. We determined the sequences of nuclear internal transcribed spacer 2 region from single Cryptomonas cells with a high success rate (83.3-97.9%), excluding one case (56.3%). A total of 325 sequences were obtained over 8 sampling days from May 28 to October 3 2012, and phylogenetic analysis indicated that all sequences were divided into six groups. Four groups were clustered together with known sequences of C. curvata, C. marssonii, C. pyrenoidifera or C. tetrapyrenoidosa, although the sequences of the other two groups did not show high similarity to known Cryptomonas species. Cryptomonas curvata dominated during the study period (45-98%), and unidentified Cryptomonas species (group 2) became dominant at high water temperatures. The genotypic composition of C. curvata also varied temporarily, suggesting that the genotypic composition of Cryptomonas was susceptible to environmental changes. These results indicated that single-cell PCR can be used to analyze the species composition and ecology of Cryptomonas.

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Seasonal variation in the net growth rate of the cyanobacterium Cylindrospermopsis raciborskii in a shallow artificial pond in northern Taiwan

Cited by 9 publications

References 24 publications

Population Dynamics of <i>Raphidiopsis raciborskii</i> and Cylindrospermopsin Concentration in Ea Nhai Reservoir in Dak Lak Province, Vietnam

Population Dynamics of <i>Raphidiopsis raciborskii</i> and Cylindrospermopsin Concentration in Ea Nhai Reservoir in Dak Lak Province, Vietnam

Appearance ofCylindrospermopsis raciborskiiin winter in an artificial pond in northern Taiwan

Identification of species and genotypic compositions of Cryptomonas (Cryptophyceae) populations in the eutrophic Lake Hira, Japan, using single-cell PCR

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