Interspecies differences in the response of fluorescence transients to changes in growth irradiance reflect different photoacclimation strategies in two diatom species

2022 ◽  
Vol 61 ◽  
pp. 102566
Author(s):  
Matthew B. Brown ◽  
Allen M. Milligan ◽  
Michael J. Behrenfeld
Keyword(s):  
Diatom Species ◽  
Interspecies Differences ◽  
Growth Irradiance ◽  
Fluorescence Transients

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%.

Interspecies Differences in Learning by Carnivores?

1959 ◽  
Vol 9 (3) ◽  
pp. 346-346 ◽  
Author(s):  
J. M. Warren ◽  
Helen B. Warren
Keyword(s):  
Interspecies Differences

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.

On the morphological variability of Navicula schmassmannii (Bacillariophyta)

2010 ◽  
Vol 44 ◽  
pp. 32-38 ◽  
Author(s):  
S. I. Genkal ◽  
W. G. Kharitonov
Keyword(s):  
Morphological Variability ◽  
Central Area ◽  
Diatom Species ◽  
Species Diagnosis ◽  
Wide Variability ◽  
Ultraoligotrophic Lake

On the basis of the studied materials from the ultraoligotrophic lake Elgygytgyn (Chukotka), a rare for the flora of Russia diatom species Navicula schmassmannii was recorded. In the studied populations of the species a wide variability of morphological quantitative (valve length and width, the number of stria in 10 μm) and qualitative (the shape of the valve and the central area) features was marked. It made the basis for emending of the species diagnosis.

Neidium vietnamensis – a new diatom species (Bacillariophyceae: Neidiaceae) from Vietnam and a checklist of the genus from Southeast Asia

2019 ◽  
Vol 34 (4) ◽  
pp. 259-269
Author(s):  
Anton Glushchenko ◽  
John Patrick Kociolek ◽  
Irina Kuznetsova ◽  
Maxim Kulikovskiy
Keyword(s):  
Southeast Asia ◽  
Diatom Species

Agonistic Behavior in Several Species of Fish

1965 ◽  
Vol 16 (3) ◽  
pp. 845-850 ◽  
Author(s):  
Arthur L. McDonald ◽  
Norman W. Heimstra
Keyword(s):  
Rainbow Trout ◽  
Largemouth Bass ◽  
Agonistic Behavior ◽  
Yellow Perch ◽  
Observation Session ◽  
Interspecies Differences ◽  
Green Sunfish

Seven species of fish were studied in an attempt to determine interspecies differences in the amount and type of agonistic behavior shown. Fish in each species were paired and the frequency of attacks shown during a 5-min. observation session was recorded. An observation session was held for 16 pairs of fish of the same species on 5 consecutive days. It was found that bluegill showed the highest frequency of attacks, then green sunfish, largemouth bass, rainbow trout, black crappie, and yellow perch in that order. No attacks were recorded for walleyes during any of the observation sessions. Qualitative differences shown in agonistic behavior among the various species are also discussed.

scholarly journals A comparative study of Pleurosigma subrectum and P. acus (Bacillariophyta)

Phytotaxa ◽  
2015 ◽  
Vol 207 (3) ◽  
pp. 273
Author(s):  
FRITHJOF A.S. STERRENBURG ◽  
STUART R. STIDOLPH ◽  
EUGENIA A. SAR ◽  
Ines Sunesen
Keyword(s):  
Comparative Study ◽  
Original Data ◽  
Type Material ◽  
Diatom Species ◽  
Morphological Differences ◽  
Sem Investigation ◽  
Made In

In continuation of an earlier paper on Pleurosigma species with an (almost) non-sigmoid valve and raphe sternum, a comparative study was made in LM and SEM of Pleurosigma subrectum and P. acus. For P. subrectum, slides and a subsample of the type material were examined. For P. acus no unmounted material permitting SEM investigation is extant; a sample containing specimens fully matching the type in LM was therefore used as epitype material for SEM. The original data on striation of P. acus are emended. No morphological differences indicating separate specific status of these two taxa were observed and P. acus is therefore here designated a heterotypic synonym of P. subrectum. From the data now available, this is a very widely distributed species. The study demonstrates the indispensable role of collections for investigations on the diversity and distribution of diatom species.

Interactive effects of nitrogen and irradiance on growth and partitioning of dry mass and nitrogen in young tomato plants

2002 ◽  
Vol 29 (11) ◽  
pp. 1319 ◽  
Author(s):  
Corine C. de Groot ◽  
Leo F. M. Marcelis ◽  
Riki van den Boogaard ◽  
Hans Lambers
Keyword(s):  
Leaf Area ◽  
Dry Mass ◽  
High Irradiance ◽  
Interactive Effects ◽  
Tomato Plants ◽  
N Limitation ◽  
N Supply ◽  
N Concentration ◽  
Growth Irradiance ◽  
Dry Mass Partitioning

The interactive effects of irradiance and N on growth of young tomato plants (Lycopersicon esculentum Mill.) were studied. Plants were grown at 70 or 300 μmol photons m–2 s–1, hereafter referred to as 'low' and 'high' irradiance, and at a range of exponential N supply rates (70–370 mg g–1 d–1) or at a constant concentration in the nutrient solution of 12 mM NO3–. At both irradiance levels, leaf area ratio was more important than net assimilation rate (NAR) in explaining effects of N on growth at mild N limitation. However, at severe N limitation, NAR became the most important parameter, as indicated by calculated growth response coefficients. Furthermore, this study shows that N supply and growth irradiance interacted strongly. The decrease of specific leaf area with increasing N limitation and increasing growth irradiance correlated with increasing leaf dry mass percentage and starch concentration. Furthermore, at low irradiance, plants partitioned more dry mass to the stem. Dry mass partitioning to roots increased with decreasing plant N concentration, and this relation appeared to be independent of irradiance. Shading increased plant N concentration and decreased dry mass partitioning to roots. Also, the relationship between plant N concentration and N partitioning to different plant organs was largely independent of growth irradiance.

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