Silica-Scaled Chrysophytes (Chrysophyceae and Synurophyceae) from New Zealand Freshwaters. II. Additions to the Flora

Wujek, Daniel E.

doi:10.2984/67.1.8

Cited by 7 publications

(32 citation statements)

References 17 publications

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“…It is noteworthy that Synurophyceae occupies a major proportion of Stramenopiles in both forest and tundra soils. The Synurophyceae, also known as scaled chrysophytes (Siver et al 2013), are important indicators of the past ecology in lacustrine environments (Wujek 2013) and have long been recognized as ubiquitous in aquatic environments (Finlay and Clarke 1999a). Our results here indicate that Synurophyceae are also abundant in soils.…”

Section: Eukaryotic Soil Microbial Communitiesmentioning

confidence: 51%

Contrasting elevational diversity patterns between eukaryotic soil microbes and plants

Shen

Liang

Shi

et al. 2014

Ecology

176

139

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The diversity of eukaryotic macroorganisms such as animals and plants usually declines with increasing elevation and latitude. By contrast, the community structure of prokaryotes such as soil bacteria does not generally correlate with elevation or latitude, suggesting that differences in fundamental cell biology and/or body size strongly influence diversity patterns. To distinguish the influences of these two factors, soil eukaryotic microorganism community structure was investigated in six representative vegetation sites along an elevational gradient from forest to alpine tundra on Changbai Mountain in Northeast China, and compared with our previous determination of soil bacterial community structure along the same gradient. Using bar‐coded pyrosequencing, we found strong site differences in eukaryotic microbial community composition. However, diversity of the total eukaryotic microorganism community (or just the fungi or protists alone) did not correlate with elevation. Instead, the patterns of diversity and composition in the total eukaryotic microbial community (and in the protist community alone) were closely correlated with soil pH, suggesting that just as for bacteria, acidity is a particularly important determinant of eukaryotic microbial distributions. By contrast, as expected, plant diversity at the same sites declined along our elevational gradient. These results together suggest that elevational diversity patterns exhibited by eukaryotic microorganisms are fundamentally different from those of plants.

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Section: Eukaryotic Soil Microbial Communitiesmentioning

confidence: 51%

Contrasting elevational diversity patterns between eukaryotic soil microbes and plants

Shen

Liang

Shi

et al. 2014

Ecology

176

139

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“…Mallomonas parvula is found in the tropics and subtropics of China [66], Nigeria [68,69], and Ecuador [70]. Mallomonas pseudocratis was reported in India [27] and the tropics and subtropics of China [66,67].…”

Section: Discussionmentioning

confidence: 99%

“…However, the biogeography of this group has not yet been sufficiently studied [8,22]. In particular, the literature on the tropical region, including its Asian distribution, is quite limited [23][24][25][26][27][28][29]. Studies of the tropical region often describe many new species, most of which are endemic [24,25,[30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

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Studies on Algae from the Order Synurales (Chrysophyceae) in Northern Vietnam

2021

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The present paper focuses on the flora of synuralean algae from four northern provinces in Vietnam: Bac Kan, Hanoi, Ninh Binh, and Thanh Hoa. Fifty-five water bodies were studied, including territories within national parks Ba Be, Ba Vi, Cuc Phuong, Ben En, and Trang An Wetland—The World Cultural and Natural Heritage and Van Long Wetland Nature Reserve. Samples were obtained from natural lakes and wetlands, artificial reservoirs and ponds, and small temporary water bodies. Electron microscopy allowed for the discovery of 39 taxa, 37 of which belonged to the genus Mallomonas and two to the genus Synura. Six taxa of the genus Mallomonas and two taxa from the genus Synura were not identified to the lower rank. Five taxa are reported for the first time in Vietnam. The most diverse flora was observed in natural protected water bodies. Eutrophic and hypereutrophic water bodies, which were prevalent in the study area, had a reduced number of selected species.

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“…Finally, a biological sample of dehydrated silica‐scaled chrysophyte alga Chrysodidymus synuroideus (Wujek, ; http://megasun.bch.umontreal.ca/protists/cdid/appearance.html; http://cfb.unh.edu/phycokey/Choices/Synurophyceae/CHRYSODIDYMUS/Chrysodidymus_Image_page.html) was investigated with the EUV microscope. These cells, ∼5

μ

m in size, have an armour of siliceous scales, consisting of a perforated oval plate with a short apical spine.…”

Section: Resultsmentioning

confidence: 99%

A stand‐alone compact EUV microscope based on gas‐puff target source

Torrisi

Wachulak

Węgrzyński

et al. 2016

Journal of Microscopy

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We report on a very compact desk-top transmission extreme ultraviolet (EUV) microscope based on a laser-plasma source with a double stream gas-puff target, capable of acquiring magnified images of objects with a spatial (half-pitch) resolution of sub-50 nm. A multilayer ellipsoidal condenser is used to focus and spectrally narrow the radiation from the plasma, producing a quasi-monochromatic EUV radiation (λ = 13.8 nm) illuminating the object, whereas a Fresnel zone plate objective forms the image. Design details, development, characterization and optimization of the EUV source and the microscope are described and discussed. Test object and other samples were imaged to demonstrate superior resolution compared to visible light microscopy.

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Silica-Scaled Chrysophytes (Chrysophyceae and Synurophyceae) from New Zealand Freshwaters. II. Additions to the Flora

Cited by 7 publications

References 17 publications

Contrasting elevational diversity patterns between eukaryotic soil microbes and plants

Contrasting elevational diversity patterns between eukaryotic soil microbes and plants

Studies on Algae from the Order Synurales (Chrysophyceae) in Northern Vietnam

A stand‐alone compact EUV microscope based on gas‐puff target source

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