New records of phytoplankton for Bangladesh. 3. Volvocales

Khondker, Moniruzzaman; Bhuiyan, Rauf Ahmed; Yeasmin, Jenat; Alam, Munirul; Sack, R. Bradley; Huq, Anwar; Colwell, Rita R.

doi:10.3329/bjpt.v14i1.518

Cited by 14 publications

(22 citation statements)

References 2 publications

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“…Historically, these two species have mainly been reported by researchers in Russia and the Ukraine, perhaps because of a greater familiarity with their taxonomic descriptions in those countries. Nearly all microscopic records are from terrestrial, mainly freshwater systems (Compère, 1966;Khondker et al, 2007;Tsarenko, 2008;Demchenko, 2011;Hindáková and Hindák, 2012;Gorokhov, 2013;Tarasova et al, 2013), but also one hypersaline lake (Gheorghievici et al, 2015). However, two marine strains have been brought into culture, both from the Arctic: one from the ice algae community in Baffin Bay (Bigelow National Center for Marine Algae and Microbiota, CCMP1189), and one from the deep chlorophyll maximum of the Beaufort Sea (Balzano et al, 2012).…”

Section: Microbial Community Compositionmentioning

confidence: 99%

Microbial Community Structure and Interannual Change in the Last Epishelf Lake Ecosystem in the North Polar Region

et al. 2017

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Climate warming is proceeding rapidly in the polar regions, posing a threat to ice-dependent ecosystems. Among the most vulnerable are microbial-dominated epishelf lakes, in which surface ice-damming of an embayment causes a freshwater layer to overlie the sea, creating an interface between distinct habitats. We characterized the physicochemical and biotic environment of Milne Fiord epishelf lake (82 • N, Canada) in three successive summers (2010)(2011)(2012), and on one date of profiling (5 July 2011) we collected samples for high through-put amplicon sequencing of variable regions of small subunit rRNA to characterize the microbial community (Eukarya, Bacteria and Archaea). Potentially active water column communities were investigated using reverse-transcribed rRNA, and phytoplankton were further characterized by accessory pigment analysis. Cluster analysis of pigment data showed a demarcation between freshwater and marine communities, which was also evident in the sequence data. The halocline community of Eukarya was more similar to the deeper marine sample than to the freshwater surface community, while the Archaea and Bacteria communities at this interface clustered more with surface communities. In 2012, conductivity-depth profiles indicated shallowing of the freshwater layer and mixing across the halocline, accompanied by lower picocyanobacteria and higher picoeukaryote concentrations. Picocyanobacteria cells were more evenly distributed throughout the water column in 2012, implying partial deep mixing. Several mixotrophic taxa of Eukarya were more abundant in the freshwater layer, where low nutrient concentrations may favor this lifestyle. Unusual features of Milne Fiord microbial communities included benthic taxa not previously reported in marine water columns (notably, the archaeon Halobacteriales), and dominance by taxa that are typically present in sparse concentrations elsewhere: for example, the Chlorophyte group Radicarteria and the betaproteobacterium Rhodoferax.Thaler et al. Microbial Communities in an Ice-Dammed Arctic LakeMilne Fiord epishelf lake is the last known lake of this kind remaining in the Arctic, and the fate of this distinct microbial ecosystem may ultimately depend on the stability of the Milne Fiord ice shelf, which has experienced a negative mass balance over the past half century.

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Section: Microbial Community Compositionmentioning

confidence: 99%

Microbial Community Structure and Interannual Change in the Last Epishelf Lake Ecosystem in the North Polar Region

et al. 2017

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“…Samples of phytoplankton were collected in a concentrated form from eight and six permanent stations of Bakerganj and Mathbaria, respectively in between 2004and 2006(Khondker et al 2006. All the investigated water bodies were ponds except one river channel (Station No.…”

Section: Methodsmentioning

confidence: 99%

New records of phytoplankton for Bangladesh. 2. Cryptophyceae and Synurophyceae

et al. 1970

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“…The second one is a polluted ditch of village Nagda, Narayanganj. Two other sampling stations are located in two domestic ponds of Pirojpur and Barisal districts (Khondker et al 2006). Samples were obtained by sieving 100 L of sub-surface water through a plankton net having a mesh aperture of 20 µm.…”

Section: Methodsmentioning

confidence: 99%

Some freshwater phytoplankton as new reports and one new forma from Bangladesh

Alfasane

Islam²,

Khondker

1970

Bangladesh J. Plant Taxon

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Eight newly recorded taxa of freshwater phytoplankton from Bangladesh have been described in the present paper. Of these, 3 species are from Cryptomonadales, 2 species from each of Volvocales and Euglenales and one species from Chromulinales. In addition one new forma of Pediastrum duplex Meyen var. duplex fa. nagdaensis M.A. Alfasane, M.S. Islam & M. Khondker fa. nov. (Chlorococcales) has also been described in this account.

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New records of phytoplankton for Bangladesh. 3. Volvocales

Cited by 14 publications

References 2 publications

Microbial Community Structure and Interannual Change in the Last Epishelf Lake Ecosystem in the North Polar Region

Microbial Community Structure and Interannual Change in the Last Epishelf Lake Ecosystem in the North Polar Region

New records of phytoplankton for Bangladesh. 2. Cryptophyceae and Synurophyceae

Some freshwater phytoplankton as new reports and one new forma from Bangladesh

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