Faculty Opinions recommendation of Lake warming favours small-sized planktonic diatom species.

2008 ◽  
Author(s):  
William Li
Keyword(s):  
Diatom Species ◽  
Planktonic Diatom

A Study of the Diatoms of the Ouse Estuary, Sussex III. The Seasonal Variation in the Littoral Epiphyte Flora and the Shore Plankton

1964 ◽  
Vol 44 (3) ◽  
pp. 613-644 ◽  
Author(s):  
J. T. Hopkins
Keyword(s):  
Littoral Zone ◽  
Sea Water ◽  
Limiting Factors ◽  
Diatom Species ◽  
Growth Phases ◽  
Lethal Temperatures ◽  
Planktonic Diatom ◽  
Coastal Sea ◽  
Temperature Records ◽  
The Relationship

SUMMARYAnalyses have been made of some of the constituents of the coastal sea water and the river water, and the results have been correlated with the growth phases of some planktonic diatom species and littoral epiphytes, although for most species the sea-water temperature and light intensity were limiting factors.The factor determining the death of an epiphytic diatom community in the littoral zone has been considered to be the air temperature in conjunction with desiccation and a summary of the limiting temperatures for each of the four substrata is given in Table 7. Table 10 is a summary of all the distribution and temperature records. The heat itself is not lethal in many cases but the desiccation of the epiphyte in the littoral zone is accelerated at higher temperatures. Diatoms in damp situations were found to occur at temperatures which in a dry site were limiting, and further work indicating the relationship between relative humidity and lethal temperatures is needed.The ability of a diatom to survive depends upon the water-retaining ability of the substratum. Chalk and large algae favoured the growth of most solitary epiphytes, and filamentous epiphytes grew particularly well on algae except the filamentous Navicula, which were best suited by chalk. The Achnanthes blue-green community was most frequent on wood. Concrete makes a firm substratum and allows rapid growth in winter but it is easily dried and most diatoms on it are destroyed in the summer.Four diatom genera (Fragilaria, Grammatophora, Biddulphia and Melosira) are able to exist in the epiphyte flora and the shore plankton and the term facultative epiphyte is suggested to describe the behaviour of at least some of the species of these genera.

Nitzschia gobbii sp. nov. (Bacillariophyceae): a common but overlooked planktonic diatom species from the northwestern Adriatic Sea

Phycologia ◽  
2021 ◽  
pp. 1-14
Author(s):  
Sonia Giulietti ◽  
Cecilia Totti ◽  
Tiziana Romagnoli ◽  
Melania Siracusa ◽  
Simone Bacchiocchi ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Diatom Species ◽  
Planktonic Diatom

Discostella oyanensis, sp. nov., a new planktonic diatom species from Nigeria, West Africa

2017 ◽  
Vol 32 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Taofikat Abosede Adesalu ◽  
Matthew L. Julius
Keyword(s):  
West Africa ◽  
Diatom Species ◽  
Planktonic Diatom

Structure and Composition of Ice Algal Assemblages from the Gulf of St. Lawrence, Magdalen Islands Area

1990 ◽  
Vol 47 (4) ◽  
pp. 780-788 ◽  
Author(s):  
Michèle A. De Sève ◽  
Maxwell J. Dunbar
Keyword(s):  
Dominant Species ◽  
Centric Diatom ◽  
Diatom Species ◽  
Centric Diatoms ◽  
Planktonic Diatom ◽  
Pack Ice ◽  
Landfast Ice ◽  
Algal Assemblages ◽  
Pennate Diatoms ◽  
Index Of Diversity

Two types of ice algal assemblages were found in the Gulf of St. Lawrence: assemblages composed predominantly of pennate diatoms (abundance > 98.0%) and assemblages with a high abundance of centric diatoms (abundance > 46.2%). The first type is similar to Arctic landfast ice algal assemblages with the pennate diatoms Nitzschia cylindrus, N. polaris, and Navicula kariana as dominant species. The second type is similar to drifting ice algal assemblages previously described from the Gulf of St. Lawrence, with a percentage of centric diatom species > 46.2% due to the dominance of the planktonic diatom Thalassiosira nordenskioeldii. Species richness and the Shannon-Weaver index of diversity were low; density ranged from 104–106 × cells∙L−1 and was negatively correlated with percent centric diatoms. Results on the structure and the composition of the ice algal assemblages are related to ice type, i.e. landfast and drifting pack ice, and compared with ice algal assemblages from higher latitudes.

Automatic accounting of Baikal diatomic algae: approaches and prospects

2019 ◽  
pp. 295-299
Author(s):  
Кonstantin А. Elshin ◽  
Еlena I. Molchanova ◽  
Мarina V. Usoltseva ◽  
Yelena V. Likhoshway
Keyword(s):  
Object Detection ◽  
Loss Function ◽  
Classification Accuracy ◽  
Diatom Species ◽  
Bounding Box ◽  
Synedra Acus ◽  
And Training

Using the TensorFlow Object Detection API, an approach to identifying and registering Baikal diatom species Synedra acus subsp. radians has been tested. As a result, a set of images was formed and training was conducted. It is shown that аfter 15000 training iterations, the total value of the loss function was obtained equal to 0,04. At the same time, the classification accuracy is equal to 95%, and the accuracy of construction of the bounding box is also equal to 95%.

Diatoms of the genus Navicula of Lake Teletskoye (Altai) and some rivers of its basin

2019 ◽  
Vol 53 (2) ◽  
pp. 255-278
Author(s):  
D. A. Chudaev
Keyword(s):  
New Species ◽  
Diatom Species ◽  
Lake Teletskoye ◽  
First Time ◽  
One New Species

As a result of study of 18 samples, collected in Lake Teletskoye and inflowing rivers in 1992–1995, 34 diatom species of the genus Navicula Bory were found. Among them 21 taxa are new for the studied region, 7 species (Navicula arkona, N. hangaica, N. cf. pseudoreinhardtii, N. ricardae, N. scaniae, N. schweigeri, N. suecicarum) are recorded for the first time in Russia. One new species (N. pseudoharmoniae sp. nov.) is described. It is compared with N. harmoniae and N. digitoconvergens.

New cryptogamic records. 4

2019 ◽  
Vol 53 (2) ◽  
pp. 431-479 ◽  
Author(s):  
I. V. Czernyadjeva ◽  
O. M. Afonina ◽  
D. V. Ageev ◽  
E. Z. Baisheva ◽  
T. M. Bulyonkova ◽  
...  
Keyword(s):  
Sakhalin Island ◽  
Diatom Species ◽  
Altai Republic ◽  
Lichenicolous Fungi ◽  
Magadan Region ◽  
Novosibirsk Region ◽  
Republic Of Bashkortostan ◽  
Khanty Mansi Autonomous

First records of diatom species from the Barents and East-Siberian seas, of Myxomycetes for the Khanty-Mansi Autonomous Area — Yugra, Novosibirsk Region, Trans-Baikal Territory, Basidiomycetes for the Arkhangelsk, Novosibirsk, Rostov and Volgograd regions, Altai Republic, Altai Territory, lichens, calicioid and lichenicolous fungi for the Murmansk, Novgorod and Tver regions, bryophytes for the Lipezk, Voronezh and Volgograd regions, St. Petersburg, Stavropol Territory, Caucasus, Republic of Bashkortostan, Yamal and Gydan peninsulas, Trans-Baikal Territory, Magadan Region, Sakhalin Island, Republic of Uzbekistan are presented. Data on localities, habitats, distribution of recorded species are provided.

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