scholarly journals Synphytosozological assessment of pasture ecosystems vegetation in south-east Ukraine

2016 ◽  
Vol 5 (4) ◽  
pp. 35-44
Author(s):  
Vladimir Mikhailovich Ostapko ◽  
Oksana Mikhailovna Shevchuk ◽  
Svetlana Anatolievna Prikhodko
Keyword(s):  
The South ◽  
Pasture Load ◽  
Steppe Ecosystems ◽  
Green Book ◽  
Chalk Outcrops

As part of the pasture vegetation of steppe ecosystems of the south-east of Ukraine we found 62 rarity formations (79% of the total number), with 338 (52%) rarity associations of dominant classification. Green Book of Ukraine includes 18 formations with 79 associations (respectively, 54% and 67% of these syntaxa of regional vegetation), and the rest of the formations and associations are rare for this region. Rare vegetation formations and their associations are listed and distributed by types of grassland steppe ecosystems. The highest syntaxonomic variety is characteristic for gully and ravine steppe ecosystems formed on eroded chernozems underlain by loess (750 associations of 81 formations), the least syntaxonomic diversity is found in above-floodplain terraced steppes on the sands (140 associations of 24 formations). The greatest number of regionally rare associations is cenotically confined to the chalk outcrops (49 associations of 16 formations). A large number of associations are stenotopic. These results suggest a high synphytosozological value of pasture ecosystems vegetation in the south-east of Ukraine, which is very important for the conservation of the steppe biome biodiversity. It should be taken into account when grounding establishment of the local reserves for biota protection, their protection regimes and performing pasture load calculations for specific areas.

scholarly journals Trends of some rare flora species populations in the Southern Urals foothills (Orenburg Region)

2019 ◽  
Vol 8 (1) ◽  
pp. 99-105
Author(s):  
Maksim Anatolievich Safonov
Keyword(s):  
Temporal Trends ◽  
Southern Urals ◽  
Meadow Steppe ◽  
The Southern Urals ◽  
Pasture Load ◽  
Steppe Ecosystems ◽  
Epipactis Helleborine ◽  
Spatial And Temporal Trends ◽  
A New Species

The results of long-term (1994-2018) studies of the distribution and abundance of rare plant species in the foothills of the Southern Urals in order to identify their spatial and temporal trends are discussed. Some species retains its low numbers; in some species the number of populations and their amount were reduced, and some, probably, entirely disappeared from the flora. It is a new species in the local flora - Bupleurum aureum , but its low number does not allow to assess objectively its status and the necessary measures of protection. Spreading of Epipactis helleborine is also sporadic. The population of Veratrum lobelianum is gradually spreading to the South due to mesophytization of the climate and changes in pasture load on meadow and meadow-steppe ecosystems. The populations of the Cicerbita uralensis and Lathyrus litvinovii are in the critical condition. Thus, the change in environmental conditions leads to the fact that simultaneously with the reduction of the rare fraction, some species that previously had a small number, begin resettlement, contributing to the change in the appearance of the vegetation cover of the southern Urals foothills.

Petrophytic feather-grass and thyme steppes in the south-east of the Kursk Region (within the limits of the Oskol river basin)

2009 ◽  
pp. 49-62
Author(s):  
A. V. Poluyanov
Keyword(s):  
River Basin ◽  
The South ◽  
Steppe Species ◽  
New Associations ◽  
Typical Steppe ◽  
Steppe Communities ◽  
Steppe Plants ◽  
Feather Grass ◽  
Kursk Region ◽  
Chalk Outcrops

The paper deals with 2 new associations, represen­ting the petrophytic steppe communities described from the Oskol river basin (Kursk Region), Gypsophilo altissimae—Stipetum capillatae ass. nov. and Carici humilis—Thymetum calcarei ass. nov. First asso­ciation is included into the alliance Astragalo-Stipion Knapp 1944. The communities of this alliance are represented by the most xerophytic variant of the feather-grass steppes of Kursk Region and they are characterized by the combination of obligatory calci­philous and typical steppe plants. Second association is included into the alliance Centaureo carbonatae—Koelerion talievii Romaschenko, Didukh et Solomakha 1996 of the order Festucetalia valesiacae Br.-Bl. et Tx. 1943. The alliance comprises petrophytic thyme steppe communities on chalk outcrops (mostly in the southern slopes) and on hill’s tops. The commu­nities are characterized by the dominance of obligatory calciphilous and petrophilous steppe species. The communities of this alliance are widely spread in the Oskol River basin in the southern part of the Middle-Russian Upland.

Presidential Republicanism in the South, 1960

1962 ◽  
Vol 24 (2) ◽  
pp. 303-322 ◽  
Author(s):  
Bernard Cosman
Keyword(s):  
The South

Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

2000 ◽  
Vol 179 ◽  
pp. 201-204
Author(s):  
Vojtech Rušin ◽  
Milan Minarovjech ◽  
Milan Rybanský
Keyword(s):  
Emission Lines ◽  
High Latitudes ◽  
Green Line ◽  
Solar Cycles ◽  
The South ◽  
Coronal Emission ◽  
Local Maxima ◽  
The North ◽  
Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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