Two new taxa of <scp>A</scp>chnanthidium and <scp>E</scp>ncyonema (<scp>B</scp>acillariophyceae) from the <scp>Y</scp>om <scp>R</scp>iver, <scp>T</scp>hailand, with special reference to the areolae occlusions implying ontogenetic relationship

Yana, Ekkachai; Mayama, Shigeki

doi:10.1111/pre.12109

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…nov. are A. pseudoconspicuum var. yomensis Yana et Mayama (Yana & Mayama 2015), A. convergens Kobayasi (Kobayasi et al 1986), A. rivulare Potapova et Ponader (Potapova & Ponader 2004) and A. crissum (Hustedt) Potapova et Ponader (Potapova & Ponader 2004), A. japonica Kobayasi (Kobayasi et al 1986). This group of species is compared in Table 3.…”

Section: Discussionmentioning

confidence: 99%

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

Yu¹,

You²,

Kociolek³

et al. 2019

Fottea

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We describe three new Achnanthidium species, A. lacustre sp. nov., A. sublanceolatum sp. nov., and A. taipingensis sp. nov., from Taiping Lake, Anhui Province (China) based on light and scanning electron microscopy. A. lacustre sp. nov. belongs to the "A. minutissimum complex" of the genus, based on it having straight external distal raphe fissures and round to elliptical areolae. Both A. sublanceolatum sp. nov., and A. taipingensis sp. nov. belong to the "A. pyrenaicum complex" of the genus, based on them having transpically-elongated areolae and deflected external distal raphe fissures. All three species are sufficiently different from other similar species based on valve outline, shape of the axial and center areas, and striae density. These three new species are all observed in benthic collections from Taiping Lake.

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Section: Discussionmentioning

confidence: 99%

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

Yu¹,

You²,

Kociolek³

et al. 2019

Fottea

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“…for example: A. delmontii Pérès, Le Cohu et Barthes (PÉRÈS et al 2012), A. pseudoconspicuum var. yomensis Yana et Mayama (Yana & Mayama 2015), A. linannulum Karthick, Taylor et Hamilton (Karthick et al 2017), A. longissimum Yu, You et Kociolek (Yu et al 2018), A. lacustre Yu, You et Kociolek (Yu et al 2019), A. sublanceolatum Yu, You et Kociolek (Yu et al 2019), A. taipingensis Yu, You et Kociolek (Yu et al 2019) et al…”

Section: Discussionmentioning

confidence: 99%

Three new subaerial Achnanthidium (Bacillariophyta) species from a karst landform in the Guizhou Province, China

You¹,

Cao²,

Yu³

et al. 2019

Fottea

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Three new subaerial species of Achnanthidium are examined and described from a karst landform of central-south China based on light and scanning electron microscopy observations, and are compared with similar taxa worldwide. A. mediolanceolatum sp. nov. is elliptical-lanceolate, not linear-lanceolate as is more typical in this genus, as well as having a bow-tie shaped central area on the raphe valve and a large lanceolate axial area on the rapheless valve, features which together make it easy to distinguish this species from others. A. parvulum sp. nov. and A. guizhouensis sp. nov. are linear-elliptical in shape, which is more common for Achnanthidium and they differ from other species mainly in size, raphe, density of striae and shape of the central area. We compared these three new species with morphologically-similar taxa, and present their ecological settings and distributions as well. The relationship between Achnanthidium and Psammothidium is discussed, and the data from these new species from Guizhou presented herein suggest the two genera are difficult to separate.

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“…Diatom samples were then taken into the laboratory and cleaned following the concentrated acid digestion method. The collected samples were boiled in hot nitric acid for 15 min, followed by hydrogen peroxide for 15 min before rinsing with distilled water (Yana and Mayama 2015). For light microscopy (LM), cleaned samples were mounted in Naphrax (SPI Supplies, West Chester, USA).…”

Section: Collection and Identification Of Benthic Diatomsmentioning

confidence: 99%

The diversity and abundance of phytoplankton and benthic diatoms in varying environmental conditions in Kok River, Chiang Rai, Thailand as bio-indicators of water quality

et al. 2021

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Abstract. Prasertsin T, Suk-ueng K, Phinyo K, Yana E. 2021. The diversity and abundance of phytoplankton and benthic diatoms in varying environmental conditions in Kok River, Chiang Rai, Thailand as bio-indicators of water quality. Biodiversitas 22: 1853-1862. The study of living organisms was important information for bio-indicators which was utilized to assess the quality of the environment. In the river ecosystem, the algae with which one organism was interesting accordingly considered the relationship of 2 groups algae, including phytoplankton and benthic diatoms and the physical-chemical parameters of Kok River Chiang Rai, Thailand. Phytoplankton and benthic diatoms were collected from five sampling sites along the Kok River during January (cool dry), March (summer), and June (rainy season) 2018, and assessed as bio-indicators to monitor environmental factors that represent water quality across varying conditions and periods. Fifty-seven species of phytoplankton and thirty-nine species of benthic diatoms were found. The phytoplankton mainly belonged to the phylum Bacillariophyta (diatom group). Physical and chemical factors affecting the dominant phytoplankton and benthic diatom species were subjected to canonical correspondence analysis (CCA). Results showed that planktonic and benthic Gomphonema lagenula positively correlated with ammonium nitrogen, recording highest abundance during the rainy season. Abundance of Achnanthidium straubianum, a planktonic and benthic diatom, and Navicula cincta negatively correlated with river velocity and water conductivity, with lowest numbers during the rainy season. Water trophic status evaluated from the main parameters of the AARL-PC score indicated that during the cool dry and summer seasons all sampling sites were classified as mesotrophic, while during the rainy season they were classified as meso-eutrophic. The combination of phytoplankton and benthic diatom can be used as bio-indicators of water quality in the Kok River and other freshwater ecosystems.

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Two new taxa of Achnanthidium and Encyonema (Bacillariophyceae) from the Yom River, Thailand, with special reference to the areolae occlusions implying ontogenetic relationship

Cited by 7 publications

References 19 publications

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

Three new subaerial Achnanthidium (Bacillariophyta) species from a karst landform in the Guizhou Province, China

The diversity and abundance of phytoplankton and benthic diatoms in varying environmental conditions in Kok River, Chiang Rai, Thailand as bio-indicators of water quality

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