Temat: Dinophyceae - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A New Marine Species of Amphidinium (Dinophyceae) from Thermaikos Gulf, Greece
Autorzy:: DOLAPSAKIS, Nicolas P.
ECONOMOU-AMILLI, Athena
Powiązania:: https://bibliotekanauki.pl/articles/763684.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:: Amphidinium thermaeum sp. nov., Dinophyceae, microscopy, LSU rDNA, molecular phylogeny
Opis:: Genus Amphidinium Claparède et Lachmann (Gymnodiniales, Dinophyceae) sensu lato has recently undergone a reappraisal using extended microscopical methods and genetic comparisons, with the type species and morphologically similar species used for the redescription of the genus Amphidinium sensu stricto. Within the latter concept of the genus, the new species Amphidinium thermaeum is established using light and scanning electron microscopy in combination with LSU rDNA phylogeny. This species was isolated from the Thermaikos Gulf in Greece, and its description is largely based on observations of cultured material. The main diacritic features distinguishing A. thermaeum from related taxa were: shape, size and plasticity of the cell, position of distal and proximal cingulum ends, site of longitudinal flagellar insertion, sulcal course, pusule details, plastid characteristics, and mode of cell division. Genetic phylogeny applying Bayesian Inference, Maximum Likelihood, and Neighbor-Joining analyses, places A. thermaeum in an independent position within the Amphidinium sensu stricto monophyletic group, and the new species is closely related to its small and morphologically similar siblings (A. massartii, A. klebsii, A. trulla, A. gibbosum, A. carterae).
Źródło:: Acta Protozoologica; 2009, 48, 2
1689-0027
Pojawia się w:: Acta Protozoologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: First report of Protoperidinium steinii (Dinophyceae) bloom from the coastal marine ecosystem - an observation from tropical Indian waters
Autorzy:: Sathishkumar, R.S.
Sahu, G.
Mohanty, A.K.
Arunachalam, K.D.
Venkatesan, R.
Powiązania:: https://bibliotekanauki.pl/articles/2078883.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Protoperidinium steinii
Dinophyceae
bloom
marine ecosystem
coastal ecosystem
red tide
eutrophication
backwater
Bengal Bay
India
Opis:: A dense bloom of Protoperidinium steinii was observed in the backwaters adjoining the western Bay of Bengal, Kalpakkam coast, which might be the first report for the world oceans. The brownish-red bloom appeared on 2 October 2019, and it was monitored on alternate days up to 14 October. Surface water temperature was about 27.5°C and salinity was <17 PSU during the bloom. Dissolved inorganic nutrients like nitrate, ammonia, silicate, and phosphate were extremely high compared to that of the coastal waters. The chlorophyll-a maxima (20.95 mg m−3) coincided with the highest Protoperidinium density (113.9 × 104 cells l −1). The contribution of P. steinii ranged from 17−93% of the total phytoplankton population. Since P. steinii is a heterotroph and voracious grazer, low autotroph density was observed during the bloom. No mass mortality of fish or other organisms was observed, thereby indicating the nontoxic nature of the bloom
Źródło:: Oceanologia; 2021, 63, 3; 391-402
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Problematic Biases in the Availability of Molecular Markers in Protists: The Example of the Dinoflagellates
Autorzy:: Gómez, Fernando
Powiązania:: https://bibliotekanauki.pl/articles/763541.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:: Alveolate, Dinophyceae, Dinophyta, DNA barcoding, microbial diversity, molecular phylogeny, unicellular eukaryotes
Opis:: Dinoflagellates (Alveolata, Dinophyceae) are protists with a truly remarkable diversity in lifestyles (free-living, parasites and mutualistic symbionts), habitats (marine, freshwater, plankton, benthos), and trophic modes (heterotrophic, plastid-containing). Here dinoflagellates are used to evaluate biases in the availability of molecular markers in relation to the variety of functional and ecological characteristics of protists. A large number of dinoflagellate sequences are available in GenBank, at least one for 56% of the 264 described genera. The most common marker is the small ribosomal subunit ribosomal DNA (49%). At the species level, SSU rDNA or the large subunit rDNA are available for 15% of the 2,386 described species. Availability of sequences of the internal transcribed spacers (ITS) and cytochrome oxidase I (COI) show a strong bias towards cultivable species. Relative to trophic mode, while about half of the known dinoflagellates are heterotrophic, only 12% of them have been sequenced compared to 29% of the plastid-containing species. For the COI marker availability is 10 times greater for plastid-containing compared to heterotrophic species. Freshwater species are underrepresented (13%) relative to the marine forms (22%). A high proportion of benthic species have been sequenced (46%) reflecting interest in Symbiodinium and harmful epiphytic taxa. Most of the relatively few described mutualistic species have been sequenced (> 80%). In contrast, only 17% of the described parasitic species have been sequenced, and most of the available sequences were not identified at the species level. In recent years, new species have been described mostly from coastal blooms or cultures. These studies are favored by the availability of abundant material for detailed studies of ultrastructure and multi-gene molecular phylogenies. Many methods are difficult to apply for the scarce specimens available from the open ocean. The requirement of these protocols, easy to apply with cultured species, is an obstacle in our knowledge of the open ocean diversity because it discourages studies based on sparse material. Consequently, in recent years descriptions of new species from the open ocean have declined considerably.
Źródło:: Acta Protozoologica; 2014, 53, 1
1689-0027
Pojawia się w:: Acta Protozoologica
Dostawca treści:: Biblioteka Nauki