Taxonomic structure of algae from inundated floodplain lakes of middle Lena area (Yakutia, Russia)

2009 ◽  
Vol 11 (2) ◽  
pp. 181-186
Author(s):  
I. I. Vasilyeva-Kralina ◽  
V. A. Gabyshev
Keyword(s):  
Floodplain Lakes ◽  
Taxonomic Structure

Peculiarities of seasonal changes of taxonomic structure and number of weevil-beetles (Coleoptera, Curculionidae) of herptobios in Kharkiv urbocenoses (Ukraine)

2019 ◽  
Vol 16 (1) ◽  
pp. 25-35 ◽  
Author(s):  
N.A. Komaromi ◽  
A.V. Putchkov ◽  
V.Yu. Nazarenko
Keyword(s):  
Early Summer ◽  
Taxonomic Structure ◽  
Dynamic Density ◽  
Number Of Species ◽  
Summer Maximum ◽  
Minimal Quantity ◽  
Slight Rise ◽  
Suburban Forests ◽  
The City ◽  
Increased Activity

A total of 54 species in 35 genera of Curculionidae are registered in the urbocenoses of Kharkiv city. Only three species, Exomias pellucidus, Otiorhynchus raucus and Ot. ovatus, are recorded as dominants. Some other species (Urometopus nemorum, Sciaphobus squalidus and Glocianus punctiger) are sporadically noted in some sites as subdominants. The total number of species turned out to be higher in the herpetobios of plantings at periphery (31), slightly lower in private farmlands of the city (21), parks and plantings of the center (17 each), but minimal in suburban forests (11 species). The highest quantity of specimens were observed for the plantations of the center and margins of city: nevertheless, minimal quantity of specimens was registered at parks and woods. The maximum number of species (including all cenoses) was recorded from the end of April to first decade of May (28 species). From May to the end of June 15–18 species were registered. Ten species were recorded at July, and only six species at August. A slight rise was noted from the end of August to mid-September (11 species). In biotopes where Exomias pellucidus appeared to be the monodominant, the seasonal dynamic density of weevils reached a peak at late May or early June, but the significant decline was observed from early June to July. At the sites with several dominants, two or three peaks were registered: at spring (May) and at mid-summer (end of June or beginning of July). Furthermore, the number of weevils decreased gradually, but some species of Curculionidae were rather abundant even from the end of summer to September–October. The spring increase is reasoned by high density of species in the genus Otiorhynchus; the peak in early summer (maximum) is caused by the increased activity of majority of dominant species; the autumn peak is also caused by the high number of species of the genus Otiorhynchus. The level of sex index (by the example of E. pellucidus) differed significantly at all plots. It was higher for the plantations at the periphery of the city (0.70), and it was minimal at private farmlands (0.20). Relative conjugacy of sex index and dynamic density were not observed: the maximum abundances of quantity of Curculionidae were recorded 20–30 days earlier than the maximal numbers of the sex index.

Revision flora of makrofytes of the aquatory of the Kazantip Nature Reserve

2019 ◽  
pp. 61-72
Author(s):  
T. V. Belich ◽  
S. Ye. Sadogurskiy ◽  
S. A. Sadogurskaya
Keyword(s):  
Species Composition ◽  
Nature Reserve ◽  
Taxonomic Revision ◽  
Warm Water ◽  
Taxonomic Structure ◽  
Marine Macrophytes

The results of nomenclature-taxonomic revision of the flora marine macrophytes of the Kazantip Nature Reserve (KNR) are presented. Currently, with the new data the species composition includes 73 species and intraspecific taxon (IST) of macroalgae and sea grasses. Taxonomic structure of flora of the macrophytes of the KNR includes 4 phylums, 7 classes, 19 orders, 28 families, (F), 37 genera. Chlorophyta - 33 species, Ochrophyta - 11, Rhodophyta - 25, Tracheophyta - 4. In the flora prevail mesosaprobic (44%), annuae (58%), brackish-sea (51%), warm-water (40%) species. The category of rare fraction includes 14 species.

Revision of Hista Oiticica (Lepidoptera: Castniidae) and discussion on the validity of its subspecies

Zootaxa ◽  
2010 ◽  
Vol 2421 (1) ◽  
pp. 1 ◽  
Author(s):  
SIMEÃO S. MORAES ◽  
MARCELO DUARTE ◽  
JORGE M. GONZÁLEZ
Keyword(s):  
Taxonomic Structure ◽  
Wing Pattern ◽  
New Synonyms ◽  
New Synonym ◽  
Wing Patterns ◽  
The Stability

Diurnal Lepidoptera tend to have colorful and conspicuous wing patterns, which is the reason the first classifications of day-flying moths and butterflies were based mainly on wing color and pattern characters. This is the case with the Neotropical Castniidae, which are usually large and colorful day-flying moths. One classification listed 134 species in 32 genera while an alternate classification recognized 81 species. In this paper we examine the taxonomic structure of the genus Hista Oiticica. It is the purpose of this paper to evaluate taxonomically useful characters besides wing pattern with the goal of classifying the taxa of Hista rather than classifying the variation of its wing pattern. In so doing, the results resolve the differences between the two proposed classifications of Hista. In addition, a lectotype is designated for Castnia boisduvalii Walker, 1854 (new synonym of Castnia fabricii Swainson, 1823) to ensure the stability of the name. Other new synonyms are proposed for C. fabricii (C. papagaya Westwood, 1877) and Castnia hegemon Kollar, 1839 (C. menetriesi Boisduval, [1875] and C. hegemon variegata Rothschild, 1919).

Vertical mixing in Amazon floodplain lakes

1984 ◽  
Vol 22 (2) ◽  
pp. 1283-1287 ◽  
Author(s):  
Sally MacIntyre ◽  
John M. Melack
Keyword(s):  
Vertical Mixing ◽  
Floodplain Lakes ◽  
Amazon Floodplain

Gut microbiome of the emerald ash borer, Agrilus planipennis Fairmaire, and its relationship with insect population density

2020 ◽  
Vol 96 (8) ◽  
Author(s):  
Judith Mogouong ◽  
Philippe Constant ◽  
Robert Lavallée ◽  
Claude Guertin
Keyword(s):  
Population Density ◽  
Gut Microbiome ◽  
Emerald Ash Borer ◽  
Agrilus Planipennis ◽  
Economic Damage ◽  
Taxonomic Structure ◽  
Rrna Gene ◽  
Local Conditions ◽  
Β Diversity ◽  
Α Diversity

ABSTRACT The gut microbial communities of beetles play crucial roles in their adaptive capacities. Environmental factors such as temperature or nutrition naturally affect the insect microbiome, but a shift in local conditions like the population density on a host tree could also lead to changes in the microbiota. The emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an exotic wood borer that causes environmental and economic damage to ash trees in North America. This study aimed to describe the taxonomic structure of the EAB gut microbiome and explore its potential relationship with borer population size. The number of EAB adults collected per tree through a 75 km transect from an epicenter allowed the creation of distinct classes of population density. The Gammaproteobacteria and Ascomycota predominated in bacterial and fungal communities respectively, as determined by sequencing of the bacterial 16S rRNA gene and the fungal internal transcribed spacer ITS2. Species richness and diversity of the bacterial community showed significant dependence on population density. Moreover, α-diversity and β-diversity analysis revealed some indicator amplicon sequence variants suggesting that the plasticity of the gut microbiome could be related to the EAB population density in host trees.

Digestive tube of an herbivorous fish ( Rhytiodus microlepis ) from the Amazonian floodplain lakes: A morphological and histochemical study

2021 ◽  
Author(s):  
Lorena Vieira Matos ◽  
Maria Inês Braga Oliveira ◽  
José Celso Oliveira Malta ◽  
Grazyelle Sebrenski Silva
Keyword(s):  
Histochemical Study ◽  
Floodplain Lakes ◽  
Herbivorous Fish ◽  
Digestive Tube

The structure and diversity of microbiomes of glacial cryoconites (North Caucasus Region)

2021 ◽  
Author(s):  
Ekaterina Ivanova ◽  
Grigory Gladkov ◽  
Anastasiia Kimeklis ◽  
Arina Kichko ◽  
Evgeny Andronov ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Microbial Consortia ◽  
Biogenic Elements ◽  
Biomass Estimation ◽  
Taxonomic Structure ◽  
Rrna Gene ◽  
North Caucasus ◽  
Vegetative Cover ◽  
Glacier Surface ◽  
Amino Acid Synthesis

<p>Studying the diversity and abundance of cryoconite biota is relevant due to global climate warming, since organo-mineral particles in their composition have a significant impact on the ice albedo decrease and, thus, increase the rate of glacier melting. Since cryoconites are "hot spots" for biota development and the only loci where soil-like bodies can form on glaciers, they contribute significantly to the cycles of biogenic elements of ice and oligotrophic ecosystems.</p><p>Samples were collected from cryoconites from the Garabashi (GBg_c) and Shkhelda (SHKg_c) glaciers as well as from moraine (Garabashi); nearby soils (Chernozem, Forest-meadow, and organo-accumulative soil) were used as controls.</p><p>GBg_c samples were characterized by potentially higher values of microbial biomass (abundance of 16 S rRNA gene copies and ITS), with maximal values in samples taken from the cracked glacier. In contrast, minimal abundance values of the studied taxonomic markers in SHKg_c were determined. The values for the samples of nearby soils occupied an intermediate position. These results may be partially explained by different colors of cryoconites, determined by differences in their biochemical composition and origin: the GBg_c were represented by "black dust", with low values of albedo and, accordingly, higher values of temperature and moisture, apparently, more favorable for microbial activity compared to the "gray" dust of the SHKg_c.</p><p>Taxonomic structure analysis revealed a specific pattern of GBg_c samples– an oligotrophic psychrophilic community with a pronounced cyanobacterial dominance was detected. Despite significant differences between cryoconites and nearby moraine in the presence of major autotrophic representatives (cyanobacteria Tychonema, Phormidesmis), the heterotrophic component is similar and is represented by a very specific set of soil microorganisms of Bacteroides, Shingomonas, Burkholderiales groups, apparently, due to the flushing out of part of the microbiome from the autotrophic microbial consortia of the glacier, explaining, as well, the grouping of these samples in the Bray-Curtis NMDS ordination. No autotrophic microbiota predominance was detected in SHKg_c, these microbiomes were typical for soils without vegetative cover, as well as without biofilms on the surface (Verrucromicrobia, Sphingomonacia, Bacteroides). A low number of phylotypes was detected for the community of the GBg_c and Сhernozem. Moreover, the alpha-diversity indices were inversely proportional to the results of microbial biomass estimation, which can be explained by greater "homogeneity" (and, apparently, narrower functional specialization) of more numerous communities.</p><p>The metabolic profile of cryoconites (according to Picrust2) is characterized by the predominance of aerobic metabolic enzymes (cytochrome c) and proteins (amino acid synthesis), indicating a potentially high level of metabolic activity of the cryoconite microbial community. These results can be explained by the reparative needs of microbial cells under the conditions of oxygenic stress and extremely low temperatures. In contrast to the control soils (especially, Chernozem), relatively low levels of the catalytic pathway and carbon exchange were determined for the cryoconites’ metabolic pathways, possibly associated with both low available carbon stocks and supply of the glacier surface, as compared to soils with higher stocks of available forms of mineral nutrition.</p><p>The work is supported by RFBR  project No 19-05-50107. </p>

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