NARDUS STRICTA (POACEAE) – НОВЫЙ ВИД ДЛЯ ФЛОРЫ РОССИЙСКОГО ДАЛЬНЕГО ВОСТОКА И АНАЛИЗ ЕГО РАСПРОСТРАНЕНИЯ

2020 ◽  
Vol 105 (6) ◽  
pp. 542-555
Author(s):  
Е. А. Глазкова ◽  
Н. С. Ликсакова
Keyword(s):  
1951 ◽  
Vol 41 (3) ◽  
pp. 469-485 ◽  
Author(s):  
G. Owen Evans

Ixodes ricinus is the common tick infesting farmstock in Wales. Dermacentor reticulatus is recorded on cattle and sheep on two farms in N. Cardiganshire.I. ricinus is widely distributed in the four major grassland zones of N.W. Cardiganshire. The most extensive areas of tick infestation are found on the marginal and hill farms. In lowland areas, except on extensive stretches of marshland, infested pastures are confined to isolated tracts of badly managed or poorly drained land. Infested grazings are invariably “rough” and contain one of the following plants as dominant: Festuca spp., Agrostis spp., Molinia caerulea, Nardus stricta, Pteris aquilina or Juncus spp. The degree of infestation of cattle depends on the relative area of the available grazing land colonised by the tick. Continuous stocking of infested pastures results in heavy infestations and vice versa.Bovine piroplasmosis is the major tick-borne disease in N.W. Cardiganshire and predominates in the lowland districts. Outbreaks of the disease on marginal and hill farms are generally infrequent. Reasons are suggested for this phenomenon. Tick pyaemia is confined to lambs on hill grazings. The incidence of this disease is low.The distribution of the tick in Wales and the border counties of Hereford and Salop shows a general relationship to areas of rough grazing. The tick is widespread in the western counties and is almost absent in the border counties. Radnorshire and Breconshire are interesting in that they have few infested farms in relation to the extensive nature of the “rough” grazing. A survey has also been conducted of the incidence of bovine piroplasmosis in Wales.


1996 ◽  
Vol 33 (5) ◽  
pp. 1145 ◽  
Author(s):  
Sheila A. Grant ◽  
Lynne Torvell ◽  
Evelyn M. Sim ◽  
J. L. Small ◽  
D. A. Elston

Ekosistemy ◽  
2020 ◽  
pp. 43-62
Author(s):  
S. V. Saksonov ◽  
V. M. Vasjukov ◽  
S. A. Senator

Grasses one of the largest families of higher plants, including about 12000 species from 950 genera. The paper presents up-to-date information about the taxonomic composition, geographical distribution and habitat conditions of cereals in the South of the Middle Volga region (within the Penza, Samara and Ulyanovsk regions). studies of Grasses were conducted throughout the southern Middle Volga region, and herbarium collections stored in LE, MOSP, MW, PKM, PVB, etc. were also studied. Agrostology the South of the Middle Volga region are 72 genera (including 2 nothogenera) and 221 species (including 5 nothospecies). In the flora of the Southern Middle Volga region, 20 rare species of Grasses, of which 5 species are included in the Red book of the Russian Federation (2008): Koeleria sclerophylla, Stipa dasyphylla, S. pennata, S. pulcherrima, S. zalesskii; 14 species – in the Red book of the Penza region (2013): Drymochloa sylvatica, Festuca wolgensis, Helictotrichon desertorum, Melica transsilvanica, Scolochloa festucacea, Stipa borysthenica, S. dasyphylla, S. lessingiana, S. pennata, S. pulcherrima, S. sareptana, S. tirsa, S. zalesskii, Trisetum sibiricum; 18 species – in the Red book of the Samara region (2017): Avenula pubescens, Bromopsis benekenii, Catabrosella humilis, Cinna latifolia, Cleistogenes squarrosa, Drymochloa sylvatica, Elytrigia pruinifera, Helictotrichon schellianum, Koeleria sclerophylla, Pholiurus pannonicus, Poa saksonovii, Psathyrostachys juncea, Stipa dasyphylla, S. korshinskyi, S. pennata, S. pulcherrima, S. tirsa, S. zalesskii; 18 species – in the Red book of the Ulyanovsk region (2015): Catabrosella humilis, Cleistogenes squarrosa, Drymochloa sylvatica, Festuca cretacea, F. wolgensis, Helictotrichon desertorum, Koeleria sclerophylla, Leymus ramosus, Nardus stricta, Psathyrostachys juncea, Stipa borysthenica, S. dasyphylla, S. korshinskyi, S. lessingiana, S. pennata, S. pulcherrima, S. tirsa, S. zalesskii. Only Poa saksonovii is endemic to the South of the Middle Volga region; 5 types of Grasses are described from the study area: Festuca wolgensis, Koeleria sclerophylla, K. transvolgensis, Leymus paboanus, Poa saksonovii.


Author(s):  
Adil Bakoğlu ◽  
Hüseyin Baykal ◽  
Muhammed İkbal Çatal

In this study, which was carried out in 2018, some vegetation characteristics of Handüzü plateau which was connected to Güneysu district of Rize province was determined by using Lup method. Canopy cover and botanical composition ratios and pasture status class were investigated in the study. As a result of the study, 4 grasses, 4 legume and 33 other family plants were identified. The rate canopy covering of the research area was 82.40%, the rate of grasses in the botanical composition was 33.37%, the rate of the legumes was 5.75% and the ratio of the other families was 60.88%. The first three species, the most common found in pasture, respectively; Nardus stricta L. (27.00%), Carex atrata L. subsp. aterrima (Hoppe) Hartm. (11.10%) and Polygala alpestris Rchb. (8.50%). Pasture status was determined as weak with a value of 2.456% degree of pasture quality. It was concluded that especially controlled grazing and top-seeding, were applied together other methods of breeding.


Author(s):  
T. I. Krivomaz

Abstract A description is provided for Diderma alpinum, a nivicolous myxomycete (slime mould). Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (Morocco, USA (Alaska, California, Colorado, Montana, Utah, Virginia, Washington), Brazil, Macquarie Island, India, Japan, Nepal, Uzbekistan, Australia (Tasmania and Victoria), New Zealand, Austria, Finland, France, Germany, Greece, Italy, Poland, Russia (Moscow oblast), Slovenia, Spain, Switzerland, UK, and Ukraine), hosts (Alnus viridis, Deschampsia alpina, D. cespitosa, Empetrum nigrum, Juncus trifidus, Larix sp., Nardus stricta, Plantae indet., Rubus sp., and Vaccinium myrtillus), and interactions and habitats.


Author(s):  
T. I. Krivomaz

Abstract A description is provided for Trichia alpina, a nivicolous myxomycete. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (Canada (Ontario and Quebec), USA (Arizona, California, Colorado, Idaho, New Hampshire, New Mexico, New York, Oregon, Washington), India (Himachal Pradesh), Japan, Russia, Turkey, Australia (Tasmania), New Zealand, Austria, France, Germany, Hungary, Iceland, Italy, Norway, Russia (Leningradskaya oblast, Komi Autonomous republic, Murmansk oblast), Spain, Sweden, Switzerland, UK, and Ukraine), hosts (Alnus sp., Cirsium spinosissimum, Cornus stolonifera, Empetrum nigrum, Graminae, Larix sp., Lycopodiopsida indet., Nardus stricta, Pinopsida, Populus tremula, P. tremuloides, Prunus lusitanica, Rubus sp., Sorbus sp., and Vaccinium myrtillus), other substrata (stone), and interactions and habitats.


Author(s):  
T. I. Krivomaz

Abstract A description is provided for Lepidoderma chailletii, a facultatively nivicolous myxomycete. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (USA (California, Colorado, Utah, Washington), China, Japan, Australia (New South Wales), Austria, Belgium, Denmark, Finland, France, Germany, Italy, Netherlands, Norway, Poland, Slovenia, Spain, Sweden, Switzerland, UK, and Ukraine), hosts (Empetrum nigrum, Graminae indet., Ilex sp., Larix sp., Nardus stricta, Pinopsida indet., Pinus sp., Populus tremula, Rubus sp., and Vaccinium myrtillus), interactions and habitats.


2020 ◽  
Author(s):  
David Badía-Villas ◽  
Lucía Buendía-García ◽  
Luis Alberto Longares-Aladrén ◽  
José Luis Peña-Monné ◽  
Clara Martí-Dalmau

<p>On two accumulation levels, separated by an unevenness up to 2 m, two contrasted plant communities can be differentiated in subalpine stage of the Pyrenees: the dense tussock-forming grass <em>Nardus stricta</em>, at the upper level (L1), and the open chalk grasslands at the lower level (L2). In order to confirm the soil-relief-grasslands relationships, we analyzed and compared soil pedogenesis and properties in both accumulation levels. In addition, we classify the soils following WRB and ST systems and we discuss the finesse of both taxonomies in these high mountain environments. The work has been carried out at 1900 masl, in the Ordesa and Monte Perdido National Park (PNOMP), in the summer grasslands site of La Estiva (Fanlo, Central Pyrenees, NE Spain). Five soil pits were studied in every accumulation level (L1 and L2) for a side-by-side comparison.</p><p>            The study of soils in the two levels of accumulation reveals a series of differences in their genesis, properties and soil classification. The accumulation of organic matter and lixiviation are the dominant edafogenetic processes in L1, to which we must add the rejuvenation by gully erosion in L2. Soils at L1 and L2 shared many physical properties as a fine granulometry, with a homogeneous particle-size distribution with depth. In both levels, the soils lack carbonates, even though limestones are the parental material. The soils in L1 have a greater thickness and, thus, a higher water holding capacity than in L2. In relation to chemical properties, soils in L1 have a significantly lower pH, a lower base saturation, and lower available calcium content than in L2, reflecting a more intense leaching process, consistent with a longer period of slope stability. Over L1 with <em>Nardus</em> mat-grasslands, the main soil is classified as Orthoeutric Cambisols (Clayic, Humic), and the soil over L2, with chalk-grasslands, as Hypereutric Leptosols (Loamic, Ochric). Soil taxonomy System (USDA), giving more weight to the temperature regime, classify both soils as Haplocryept, at the level of great group, separating them at the subgroup level as Typic Haplocryept (L1) and Lithic Haplocryept (L2), according to the depth at which limestone appears (lithic contact). Definitely, the microtopograhy and geomorphologic context, is linked to the pedodiversity, which goes hand in hand with plant diversity in this subalpine environment.</p>


Sign in / Sign up

Export Citation Format

Share Document