Taxonomic composition of planktonic and ice algae in Antarctic waters (2006–2007 studies)

2009 ◽  
Vol 43 ◽  
pp. 36-49
Author(s):  
R. M. Gogorev
Keyword(s):  
Taxonomic Composition ◽  
Ice Algae ◽  
Number Of Species ◽  
Diverse Species ◽  
Antarctic Waters ◽  
Antarctic Algae

Plankton and ice assemblages of antarctic algae were studied in 2006-2007. Diatoms prevailed in number of species and abundance in both ice and plankton samples. Three genera Chaetoceros, Thalassiosira and Fragilariopsis were the most diverse. Species of 10 genera (Chaetoceros, Thalassiosira, Coscinodiscus, Rhizosolenia, Proboscia, Eucampia, Corethron, Odontella, Fragilariopsis, Pseudo-nitzschia) dominated in plankton. Ice flora included mainly 6 diatom genera (Fragilariopsis, Berkeleya, Nitzschia, Entomoneis, Navicula, Cylindrotheca).

The genus Chaetoceros (Bacillariophyta) in Arctic and Atarctic

2016 ◽  
Vol 50 ◽  
pp. 56-111 ◽  
Author(s):  
R. M. Gogorev ◽  
N. I. Samsonov
Keyword(s):  
Sea Ice ◽  
Taxonomic Composition ◽  
The Arctic ◽  
Species Number ◽  
Polar Regions ◽  
Arctic Seas ◽  
Cosmopolitan Species ◽  
Number Of Species ◽  
Antarctic Waters ◽  
The Antarctic

A floristic review of the genus Chaetoceros from Arctic and Antarctic waters is undertaken. Taxonomic composition of the Chaetoceros from the Russian Arctic seas, as well as from some regions of the Antarctic was investigated in both water column and sea ice. The genus is rather diverse in both polar regions: 55 species in Arctic and 34 ones in Antarctic. The regions differ in total number of species, number of species belonging to the subgenera Chaetoceros and Hyalochaete and to different sections. Species of the genus are often dominant and the most abundant in Arctic phytoplankton. However, the genus is not prevailing in number of the dominant species as well as in share of the total cell abundance of Antarctic phytoplankton. The importance of the species in sea ice assemblages of the Antarctic is more significant as compared with the Arctic. The Arctic is characterized by cosmopolitan species and those widely distributed in the Northern Hemisphere, more than half of the Chaetoceros taxa are common to all Arctic seas. The Antarctic has a high percentage of endemic Chaetoceros species. Both polar regions are similar in terms of Chaetoceros species composition mainly due to cosmopolitan species.

scholarly journals Brief Communication: Capturing scales of spatial heterogeneity of Antarctic sea ice algae communities

2016 ◽  
Author(s):  
Alexander L. Forrest ◽  
Lars C. Lund-Hansen ◽  
Brian K. Sorrell ◽  
Isak Bowden-Floyd ◽  
Vanessa Lucieer ◽  
...  
Keyword(s):  
Sea Ice ◽  
Spatial Heterogeneity ◽  
First Year ◽  
Ice Algae ◽  
Ecosystem Response ◽  
Algae Biomass ◽  
Sea Ice Algae ◽  
Antarctic Sea Ice ◽  
Spectral Bands ◽  
Antarctic Waters

Abstract. Identifying spatial heterogeneity of sea ice algae communities is critical to predicting ecosystem response under future climate scenarios. Using an autonomous robotic sampling platform beneath sea ice in McMurdo Sound, Antarctica, we measured irradiance in spectral bands expected to describe the spatial heterogeneity. Derived estimates of ice algae biomass identified patchiness at length scales varying from 50–70 m under first-year sea ice. These results demonstrate that a step-change in how these communities can be assessed and monitored. The developed methodologies could be subsequently refined to further categorize different ice algae communities and their associated productivity in both Arctic and Antarctic waters.

scholarly journals Beetles belonging to the family bruchidae deposited in the entomological collection of the institute of ecology and systematics, La Habana, Cuba

2015 ◽  
Vol 7 (2) ◽  
pp. 120
Author(s):  
ILEANA FERNÁNDEZ-G ◽  
ADONIS GONZÁLEZ-C
Keyword(s):  
Host Plant ◽  
Taxonomic Composition ◽  
Number Of Species ◽  
The Family ◽  
Basic Collection

  The present paper gives information on volume and taxonomic composition of Bruchidae (Coleoptera) deposited in the entomological collection of the Ecology and Systematics Institute, La Habana, Cuba. The inventory includes number of species, genera and specimens, as well as data of labels attached to specimen. The collection contains 318 specimens, 13 genera and 31 species included in three subfamilies. Of the 13 morphospecies, three are identified until genera and 10 to family. A list of species with data about localities, date of collecting and in some cases the host plant are included. The Basic collection contains more number of species and specimens than Gundlach collection which surpasses in endemic and types deposited. The specimens were captured in 13 of the 15 provinces and the special municipality Isle of Young; Provinces with more specimens are La Habana and Artemisa. The period of more specimens collected was from 1916 to 1939 (17 species and 96 specimens)

scholarly journals Ecological and taxonomic analysis of the coastal flora of the Auliekol region (Kostanay region)

2020 ◽  
Vol 99 (3) ◽  
pp. 83-90
Author(s):  
Saule Koblanova ◽  
◽  
Yulia Rogozhkina ◽  
Keyword(s):  
Detailed Analysis ◽  
Life Forms ◽  
Taxonomic Composition ◽  
Coastal Vegetation ◽  
Ecological Groups ◽  
Taxonomic Analysis ◽  
Number Of Species ◽  
Natural Lakes ◽  
Biodiversity Maintenance ◽  
Species Being

The study of flora is an important aspect of biodiversity maintenance and monitoring. Kostanay region is not a sufficiently explored region requiring a detailed analysis of coastal vegetation. During research in 2016–2019 the composition of the coastal flora of 6 geographical points was studied: rivers (Ubagan, Karasu) and natural lakes (Teacher, Solyenoe No. 1, Solyenoe No. 2, Kairankol). As a result of studies conducted on the territory of the Auliekol district of the Kostanay region, 106 species of coastal flora from 84 genera and 37 families were found. The taxonomic composition is characterized by dominance among the families Asteraceae, Poaceae and Fabaceae, among the genera — Artemisia, Plantago, Astragalus. In the Auliekol region, plants of the steppe cenotic group prevail, which is explained by the location of the study area within the Turgai lodge. In the surveyed territory, 7 ecological groups of plants were identified, with the maximum number of species being xero-mesophytes (33 taxa), the minimum — xerophytes (1 species). Among life forms, only 4 groups were noted, of which the maximum falls on perennial herbaceous plants (78 species). Uneven distribution of plants in the surveyed reservoirs was revealed. The maximum amounts falls on the floodplain of the river Ubagan, the minimum — on the lake Teacher.

scholarly journals On the study of the coenoflora of poplar relict woodlands of the middle course of the Syrdarya river

2021 ◽  
Vol 103 (3) ◽  
pp. 31-40
Author(s):  
Polina Vesselova ◽  
◽  
Gulmira Kudabayeva ◽  
Bektemir Birimkululy Osmonali ◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Significant Role ◽  
Floristic Composition ◽  
Taxonomic Composition ◽  
Third Place ◽  
High Position ◽  
Hierarchical Order ◽  
Number Of Species ◽  
Meadow Communities

The article provides a list of the coenoflora species of poplar relict woodlands of the Syrdarya River valley within the Kyzylorda region. The list is compiled on the basis of data obtained as a result of the implementation of grant and contract projects related to the study of flora and vegetation of the middle course of the Syrdarya river. A map of the description points is provided. The taxonomic composition is revealed and a comparative analysis of the spectrum of the leading families with the data of floristic and geobotanical studies of other authors conducted in this region is carried out. In particular, 103 species from 31 families were identified in the cenoflora, with the 5 largest families accounting for 61.2 % of the total number of species. The hierarchical order of addition is as follows: Chenopodiaceae, Asteraceae, Brassicaceae, Poaceae, Fabaceae. Comparative analysis shows that the set of leading families in the compared lists is the same. However, the sequence of the three families changes somewhat: Brassicaceae, Fabaceae, and Poaceae. If the floristic composition of the floodplain of the valley of the Syrdarya river Poaceae takes 3 spot, followed by Fabaceae and Brassicaceae, to sanoflore woodland, the sequence is as follows: Brassicaceae is in third place, followed by. Poaceae and Fabaceae, respectively. The significant role of representatives of Poaceae in the floodplain flora is quite natural, given the significant participation in the composition of vegetation of meadow communities. And the high position of Brassicaceae in the cenoflora, as a rule, of antrogogenously disturbed woodlands, is formed due to the annual anthropophilic species of this family.

SPECIES DIVERSITY AND COMPOSITION OF DUNG BEETLE (COLEOPTERA: SCARABAEOIDEA) ASSEMBLAGES IN NORTH AMERICA

2000 ◽  
Vol 132 (3) ◽  
pp. 307-321 ◽  
Author(s):  
Jorge M. Lobo
Keyword(s):  
North America ◽  
Native Species ◽  
Chihuahuan Desert ◽  
Dung Beetle ◽  
Taxonomic Composition ◽  
Species Number ◽  
Number Of Species ◽  
Historical Factors ◽  
North America North ◽  
Foreign Species

AbstractData from 18 studies carried out on dung beetles from temperate North America (north of 25 ° latitude) are compared to verify the existence of some geographical pattern in the variation of three parameters: (1) species number, (2) taxonomic composition, and (3) number of introduced species. Southern localities are characterized by a larger number of species and a significantly higher number of scarabaeine species than northern localities (only southern communities located inside the Chihuahuan desert do not conform to this pattern). To explain the latitudinal pattern in faunistic composition and number of species, historical factors are postulated. Foreign species of the tribe Aphodiini seem to be more frequent in the northern localities where more aphodiine native species occur. In contrast, foreign species of the subfamily Scarabaeinae are not more frequent in the southern localities with a greater number of native scarabaeine species. These results are consistent with the hypothesis that the more diverse assemblages of native dung beetle are more resistant to invasion by foreign species.

scholarly journals Enhanced bottom-ice algal biomass across a tidal strait in the Kitikmeot Sea of the Canadian Arctic

Elem Sci Anth ◽  
2019 ◽  
Vol 7 ◽  
Author(s):  
Laura A. Dalman ◽  
Brent G. T. Else ◽  
David Barber ◽  
Eddy Carmack ◽  
William J. Williams ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Chlorophyll A ◽  
Stoichiometric Composition ◽  
Open Water ◽  
Taxonomic Composition ◽  
Water Dynamics ◽  
Algal Community ◽  
The Arctic ◽  
First Year ◽  
Ice Algae

Sea ice algae are an important contributor of primary production in the Arctic ecosystem. Within the bottom-ice environment, access to nutrients from the underlying ocean is a major factor controlling production, phenology, and taxonomic composition of ice algae. Previous studies have demonstrated that tides and currents play an important role in driving the flux of nutrients to bottom-ice algal communities when biological demand during the spring bloom is high. In this study we investigate how surface currents under landfast first-year ice influence nutrient supply based on stoichiometric composition, algal chlorophyll a biomass and species composition during spring 2016, in Dease Strait, Nunavut. Stronger water dynamics over a shoaled and constricted strait dominated by tidal currents (tidal strait) supported turbulent flow more than 85% of the deployment duration in comparison to outside the tidal strait in an embayment where turbulent flow was only evidenced a small percentage (<15%) of the time. The system appeared to be nitrate-depleted with surface water concentrations averaging 1.3 μmol L–1. Increased currents were correlated significantly with a decrease in ice thickness and an increase in ice algal chlorophyll a. Furthermore, pennate diatoms dominated the ice algal community abundance with greater contribution within the strait where currents were greatest. These observations all support the existence of a greater nutrient flux to the ice bottom where currents increased towards the center of the tidal strait, resulting in an increase of bottom ice chlorophyll a biomass by 5–7 times relative to that outside of the strait. Therefore, expanding beyond the long identified biological hotspots of open water polynyas, this paper presents the argument for newly identified hotspots in regions of strong sub-ice currents but persistent ice covers, so called “invisible polynyas”.

scholarly journals Taxonomy and bioecology of Hemiptera Diaspididae in fruit and landscape trees

2021 ◽  
Vol 244 ◽  
pp. 02039
Author(s):  
Jurabek Yakhyoev ◽  
Khojimurod Kimsanbayev ◽  
Bakojon Murodov ◽  
Zukhra Akmedova
Keyword(s):  
Ornamental Plants ◽  
Taxonomic Composition ◽  
Number Of Species ◽  
The Family ◽  
Total Fauna ◽  
Ornamental Trees ◽  
Landscape Trees

Scales damage many plants such as apples, pears, plums, quinces, peaches, almonds, hawthorn, pine, poplar and other orchards and ornamental trees. According to the taxonomic composition of the fauna of scales found in fruit and ornamental plants of Tashkent province in Uzbekistan, the number of generations in the family Diaspididae in the fauna is 18 (Diaspidiotus, Diaspis, Dynaspidiotus, Unaspis, Shansiaspis, Salicicola, Parlatoria, Lepidosapis, Lepidosaphes, Lepidosaphes, Lepidosaphes Carulaspis, Rhizaspidiotus, and Pseudaulacaspis), and the number of species was 30. Diaspidiotus (8 species, 26.6%) and Lepidosaphes (4 species, 13.3%) predominate in the distribution of species, while Diaspis, Dynaspidiotus, Unaspis, Shansiaspis, Salicicola, Parlatoria, Leucaspis, Aulacaspis, Aonidia, and Chon. The number of species of the genus Chlidaspis, Prodiaspis, Mercetaspis, Carulaspis and Rhizaspidiotus is monotypic, the representatives of the genus Parlatoria and Chionaspis have 2 species and account for 13.3% of the total fauna. Aonidia, Chlidaspis, Prodiaspis, Mercetaspis, Carulaspis and Rhizaspidiotus genus have 1 species, accounting for 46.7% of the total fauna.

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