scholarly journals Diversity of ciliates in small rivers in vicinity of Khabarovsk and in southern Sakhalin Island

2016 ◽  
Vol 186 (3) ◽  
pp. 182-192
Author(s):  
Alexander G. Panov ◽  
Mikhail M. Tribun ◽  
Lyudmila I. Nikitina
Keyword(s):  
Species Composition ◽  
Sakhalin Island ◽  
Small Rivers ◽  
Paramecium Caudatum ◽  
Nutrient Media ◽  
Modified Method ◽  
Southern Sakhalin ◽  
Regional Similarity

Data on species composition of ciliates in the small rivers at Khabarovsk and in southern Sakhalin Island are presented. Modified method of sampling was applied with using of samplers and “glass fouling” on the shallows of the rivers. More than 230 samples were collected in the small rivers at Khabarovsk and about 200 samples in the southern Sakhalin. Species composition of the ciliates was determined immediately after the sampling and repeatedly on nutrient media. In total, 86 species of ciliates are identified, mostly belonged to the classes Oligohymenophorea and Spirotrichea. Six eurybionts were found: Coleps hirtus, Paramecium caudatum, Dexiostoma campylum, Colpidium colpoda, Uronema nigricans, and Vorticella convallaria сomplex . The classes Armophorea and Phyllopharyngea were more diverse by species in the area at Khabarovsk but the class Spirotrichea - in southern Sakhalin. In general, faunas of ciliates in two surveyed regions are similar. The highest inter-regional similarity of the species composition is registered between the rivers at Khabarovsk and the Susuya River in Sakhalin (25-33 %, by Jackaroo) that is probably associated with a heightened level of pollution in the Susuya. Most of the species adapt to habitat rapidly, so they are found in different environments: among benthos, plankton, periphyton. Some patterns of the ciliocommunities are discussed.

scholarly journals Species composition of macrozoobenthos in lagoons of Sakhalin Island

2015 ◽  
Vol 183 (4) ◽  
pp. 125-144
Author(s):  
Vjacheslav S. Labay
Keyword(s):  
Species Composition ◽  
Water Exchange ◽  
Wide Spectrum ◽  
Benthic Fauna ◽  
Sakhalin Island ◽  
Geographical Isolation ◽  
Southern Sakhalin ◽  
Discharge Regime ◽  
Water Stratification ◽  
Lagoon Lake

Species composition of macrozoobenthos in lagoons of Sakhalin Island (in total, 637 species) is described on the base of cited data and results of author’s surveys. Its species composition is formed under influence of wide spectrum of environmental factors, as size of lagoon, water salinity, periodicity of connection with the sea and type of the water exchange, river discharge regime, climatic and geographical isolation, etc. Generally, 6 types of lagoons are determined on the coast of Sakhalin differed by composition of benthic fauna: 1) large semiclosed salty lagoon (Lake Busse in southern Sakhalin); 2) small semiclosed salty lagoons with water stratification and periodic connection with the sea (Lake Izmenchivoe and Lake Ptichye in southern Sakhalin); 3) large shallow semiclosed lagoons (in northern Sakhalin); 4) small isolated brackish lagoon (Kuegda Bay in northern Sakhalin); 5) closed oligosaline lagoons (Lake Tunaicha and Lake Aynskoe in southern Sakhalin); 5) isolated freshwater lagoons (Vavaysko-Chibisanskaya lake system in southern Sakhalin). Salty and freshwater lagoons are distinguished by the highest species diversity.

Lichens of swamp complexes of Sakhalin Island (Sakhalin Region, Russian Far East)

2021 ◽  
Vol 55 (2) ◽  
pp. 405-426
Author(s):  
I. F. Skirina ◽  
N. A. Tsarenko ◽  
F. V. Skirin
Keyword(s):  
Species Composition ◽  
Russian Far East ◽  
Far East ◽  
Sakhalin Island ◽  
The South ◽  
Red Lists ◽  
The Far East ◽  
First Time ◽  
Lichen Flora

This paper presents the results of the study of lichen flora in swamp complexes of Sakhalin Island, obtained during expeditionary research in 2005–2009 and 2014–2020. The revealed species composition of lichens includes 172 species. The 28 of them are new for Sakhalin and 93 are new for the island swamp complexes. Bryocaulon pseudosatoanum is included in the regional and federal Red lists. Lecidea nylanderi is new to the south of the Far East. The information about substrates, habitats and locations is given for all species. The data on the distribution in the south of the Far East and, in some cases for all Far East, are listed for selected species that are new for Sakhalin Island and the south of the Far East. For the first time, a characteristic of the distribution of lichens in oligotrophic, eutrophic and mesotrophic bogs of Sakhalin Island is given.

Recurrence of extreme floods in southern Sakhalin Island as evidence of paleo-typhoon variability in the northwestern Pacific since 6.6 ka

2020 ◽  
Vol 556 ◽  
pp. 109901
Author(s):  
Nadezhda Razjigaeva ◽  
Tatiana Grebennikova ◽  
Larisa Ganzey ◽  
Vladimir Ponomarev ◽  
Alexey Gorbunov ◽  
...  
Keyword(s):  
Sakhalin Island ◽  
Northwestern Pacific ◽  
Extreme Floods ◽  
Southern Sakhalin

scholarly journals The zone of temporary flooding of small rivers as an area of increased floristic diversity

2018 ◽  
Vol 26 (1) ◽  
pp. 30-36 ◽  
Author(s):  
E. G. Krylova ◽  
A. V. Tikhonov ◽  
E. S. Ivanova
Keyword(s):  
Species Composition ◽  
Seed Bank ◽  
Water Levels ◽  
Perennial Grasses ◽  
Small Rivers ◽  
Seed Migration ◽  
Reservoir Species ◽  
Level Regime ◽  
The Difference ◽  
The Rybinsk Reservoir

During fluctuating water levels in the lower reaches of rivers, large areas of shallow water are exposed, forming a zone of temporary flooding (TFZ). The level regime of the water body determines the conditions for the growth of plants, the period available for vegetation of species and the path of seed migration. The seed bank is an integral part of a riparian biocenosis, experiencing the characteristics of environmental factors which influence its structure. Our study of the vegetation cover was carried out by the method of route survey of ecotopes in the estuaries of the Korozhechna and Ild rivers, tributaries of the Rybinsk Reservoir. Species composition of the flora is given in accordance with APG IV. The cenotic structure is characterized in terms of the Brown-Blanke school. To assess the species composition of the seed bank, a transect was placed along the width of the TFZ, on which cores were selected. Flora of the Korozhechny river is represented by 59 species from 24 families and 45 genera. Most numerous families: Poaceae (12%), Cyperaceae (10%), Polygonaceae (10%), Asteraceae, Ranunculaceae and Brassicaceae (by 7%). Flora of the Ild river is represented by 42 species from 18 families and 29 genera. Most numerous families: Cyperaceae (21%), Ranunculaceae (14%), Poaceae (12%), Plantaginaceae (7%). We found two rare species: Carex bohemica – on the Ild river and Ranunculus reptans – on both rivers. The difference in the species composition is explained by the greater riparian area of the TFZ on the Korozhechna river, characterized by a wide low floodplain. Phytocenosis form multicomponent complexes and are represented by associations Scirpetum lacustris, Phalaroidetum arundinaceae, Caricetum gracilis, Phragmitetum communis – on both rivers, Hippuridetum vulgaris и Batrachietum circinati – in terrestrial form on the Korozhechna river, and Eleocharitetum palustris and Oenantho-Rorippetum on the Ild river. In the seed bank composition of the TFZ of the transition zone of the Korozhechna river receiver 25 species were found, Ild river – 30 species. The ecological structure of the flora of both rivers and the seed bank is dominated by species of waterlogged and humid habitats. Their share (hygrophyte and hygromeso-and mesophyte) accounts for about 50%. With prolonged drying, they can normally develop in the TFZ. In the biomorphological structure, the main part of the flora and seed bank species are perennial grasses, characterized by great environmental plasticity, adapted to extreme conditions of habitat, having wide ecological amplitude with respect to the ground and which can withstand considerable fluctuations in the water level. As a result, our work has confirmed that the seed bank is a hidden component of plant communities and reflects the floristic potential of ecologically unstable territories.

scholarly journals Structure of benthic communities in small rivers of southern Sakhalin in summer-autumn period, a case of the Lyutoga River tributaries

2016 ◽  
Vol 184 (1) ◽  
pp. 178-185
Author(s):  
Lyubov A. Zhivoglyadova ◽  
Vyacheslav S. Labay ◽  
Dinara S. Dairova ◽  
Irina V. Motylkova ◽  
Vitaly D. Nikitin ◽  
...  
Keyword(s):  
Benthic Communities ◽  
Small Rivers ◽  
Autumn Period ◽  
Southern Sakhalin

Fossil impressions of pectinariid tubes (Polychaeta) in Miocene sediments of the Sakhalin Island

2017 ◽  
Vol 26 (2) ◽  
pp. 212-214 ◽  
Author(s):  
S.Yu. Gagaev
Keyword(s):  
Late Miocene ◽  
Sakhalin Island ◽  
Higher Taxa ◽  
Southern Sakhalin ◽  
The Family ◽  
Coastal Cliffs ◽  
Bristle Worms

The fossil impressions of tubes belonging to the bristle worms of the family Pectinariidae and probably the genus Pectinaria Savigny, 1818 was found at the coastal cliffs of the Tartar Strait (Southern Sakhalin) in deposits of the late Miocene Kurasi Formation. Rare mentions of findings of impressions of the polychaetes tubes perhaps may be explained by the fact that such impressions are misidentified as fossils of animals from other higher taxa. Some new data on the bionomics of the recent pectinariids are given and some taphonomical aspects of the group are considered.

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