Evidence for Multistage and Polychronous Alkaline–Ultrabasic Mesozoic Magmatism in the Area of Diamondiferous Placers of the Ebelyakh River Basin (Eastern Slope of the Anabar Shield)

The article considers the natural conditions, landscape, floristic and phytocenotic features of the territory of the Poli river basin of the eastern slope of the Subpolar Urals. A historical overview of geographical studies of the area is given. The main components that affect the formation of landscapes are characterized. A landscape map of the region under study is proposed. Particular attention is paid to the characteristics of rare plants observed in this territory. The necessity of isolating the study area as a natural monument is substantiated.

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Population genetics of Bull Trout (Salvelinus confluentus) in the Upper Athabasca river basin

10.1101/743203 ◽

2019 ◽

Author(s):

Emma K. T. Carroll ◽

Steven M. Vamosi

Keyword(s):

River Basin ◽

Habitat Degradation ◽

Isolation By Distance ◽

Land Use Changes ◽

River Basins ◽

Bull Trout ◽

Eastern Slope ◽

Salvelinus Confluentus ◽

Athabasca River ◽

Population Genetic Variation

AbstractAcross its native range, Bull Trout (Salvelinus confluentus) extent and abundance are in decline due to historic overharvest and habitat degradation. Because Bull Trout are dependent on extensively connected, cold, clean headwater habitats, fragmentation from land use changes causes difficulty when determining the true extent and health of their populations, with Bull Trout of Alberta’s Eastern Slope region being no exception. Across this region, 431 Bull Trout from 20 sites were sampled from the Athabasca and Saskatchewan River basins and compared using 10 microsatellite loci to characterize within- and among-population genetic variation. The Saskatchewan and Athabasca River basins contained similar levels of heterozygosity but were differentiated from one another. Within the Athabasca River basin, five genetically differentiated clusters were found. Additionally, no isolation-by-distance pattern was observed between these sites. These results suggest these populations have ample genetic diversity, but genetic differentiation should be considered when deciding whether and how to alter connectivity between populations.

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The mosses of the Khulga River Basin (Subpolar Ural, Khanty-Mansi Autonomous Area — Yugra)

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2020.54.1.211 ◽

2020 ◽

Vol 54 (1) ◽

pp. 211-241

Author(s):

E. D. Lapshina ◽

E. A. Ignatova ◽

M. S. Ignatov ◽

G. N. Ganasevich ◽

Yu. V. Skuchas

Keyword(s):

River Basin ◽

Eastern Slope ◽

Ural Mountains ◽

The Urals ◽

Moss Species ◽

Subpolar Urals ◽

Annotated List ◽

First Time ◽

The Village ◽

Khanty Mansi Autonomous

Result of an extensive moss study of earlier nearly unexplored areas of the northeastern part of the Subpolar Urals, namely Khulga River Basin is presented. An annotated list of mosses is compiled based on the identification of 1200 specimens collected in the Khulga River Basin (60.45–65.20°N, 60.42–62.20°E). The river starts at the border between the Polar and Subpolar Urals and flows down southwards along the eastern slope of the Ural Mountains to the confluence with the Severnaya Sosva River near the village Saranpaul (Berezovo District, Khanty-Mansi Autonomous Area — Yugra). The list includes 210 moss species, of which 56 species are new to the Khanty-Mansi Autonomous Area — Yugra. Five species are new to the Urals: Didymodon perobtusus, Lewinskya iwatsukii, Schistidium frisvollianum, Sphagnum mirum, Warnstorfia tundrae. Further 9 species were found in the Subpolar Urals for the first time: Dicranum bardunovii, D. laevidens, D. schljakovii, Encalypta pilifera, Flexitrichum gracile, Grimmia elatior, G. tergestina, Orthotrichum hyperboreum, Sphagnum annulatum. The data on occurrence of many moss species, which were previously known from single finds in the mountainous part of the area, is significantly expanded. Ecology, phytocenotic preference and distribution of the recorded species are discussed.

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Butterflies (Lepidoptera: Papilionoidea) of an Andean forest on eastern slope of Tona river basin, Santander, Colombia

Anales de Biología ◽

10.6018/analesbio.42.09 ◽

2020 ◽

pp. 75-84

Author(s):

Alfonso Villalobos-Moreno ◽

Julián Adolfo Salazar-Escobar

Keyword(s):

River Basin ◽

Abundant Species ◽

Sampling Effort ◽

Eastern Slope ◽

The Family ◽

Del Rio

El objetivo fue establecer la composición de especies de mariposas en dos localidades en la cuenca del río Tona. Se recolectaron mariposas en el proyecto Caracterización de la Entomofauna silvestre de la cuenca de río Tona, Santander. Se colectaron 262 ejemplares y 91 especies de las familias Hesperiidae, Pieridae, Lycaenidae, Riodinidae y Nymphalidae. La familia Nymphalidae tuvo la mayor abundancia (169) y riqueza de especies (56), y las especies más abundantes: Euptychoides laccine (15) y Pedaliodes phrasis (12). El análisis de calidad del inventario señaló una riqueza potencial de 168,61, proporción de especies observadas del 53,97% y esfuerzo de muestreo del 99,97%. Puente Rojo tuvo los mayores valores de diversidad: abundancia (168), riqueza observada (72), N0 (165,20), N1 (52,44) y N2 (36,66). The objective was to establish the composition of species of butterflies in two localities in Tona river basin. We made captures of butterflies for the project Characterization of wild entomofauna of Tona river basin, Santander. We collected 262 specimens and 91 species of the families Hesperiidae, Pieridae, Lycaenidae, Riodinidae and Nymphalidae. The family Nymphalidae was higher abundance (169) and richness of specie (56), and the most abundant species: Euptychoides laccine (15) and Pedaliodes phrasis (12). The analysis of inventory quality indicated a potential richness of 168.61, proportion of observed specie of 53.97% and sampling effort of 99.91%. Puente Rojo had the highest diversity values: abundance (168), observed richness (72), N0 (165.20), N1 (52.44) y N2 (36.66).

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A new species of the catfish genus Cordylancistrus (Siluriformes, Loricariidae) from the Magdalena River, Tolima, Colombia

Zootaxa ◽

10.11646/zootaxa.4294.5.2 ◽

2017 ◽

Vol 4294 (5) ◽

pp. 522 ◽

Cited By ~ 1

Author(s):

FRANCISCO R. PROVENZANO ◽

FRANCISCO A. VILLA-NAVARRO

Keyword(s):

New Species ◽

River Basin ◽

Geographic Distribution ◽

Western Slope ◽

Eastern Slope ◽

Cordillera Central ◽

Magdalena River ◽

A New Species

A new species of catfish is described from Colombia, and provisionally assigned to the genus Cordylancistrus. The new species is most similar to C. perijae and C. nephelion from Venezuela. The description is based on ten specimens collected from tributaries of the Magdalena River which drain the eastern slope of the Cordillera Central and the western slope of Cordillera Oriental, in the Department of Tolima. The new species is the first Cordylancistrus described from the Magdalena River basin. With this discovery, the number of Cordylancistrus species in Colombia increases to three. The geographic distribution of the species suggest that Andean orogenesis played an important role in the diversification of the group.

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