scholarly journals Plant species of concern and plant associations of Powder River county, Montana /

2002 ◽  
Author(s):  
Bonnie L. Heidel ◽  
Susan. Crispin ◽  
Catherine. Jean ◽  
◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 97-101
Author(s):  
Dmitry Sergeevich Lyubarsky ◽  
Rimma Petrovna Tokinova

The paper deals with the examination results of flora and vegetation of the Melekeska and Shukralinka valleys within Naberezhnye Chelny. The most common plant associations are identified, they are Bromopsetum variograminosum, B. varioherbosum, Festicetum variograminosum, Calamagrostetum epigeiosum; Phragmitetum australis associations are identified in the flooded areas. Anthropogenically altered areas with a high mosaicity of listed above associations communities and ephemeral weeds are widely represented. The volume and structure are shown in the areas flora. This area is subjected to constant anthropogenic load. Taxonomic and geographic analyses of flora as well as a range of vital forms and ecological types are submitted. 120 plant species from 94 genera and 40 families have been identified. The position of the leading families is like that in regional flora, Asteraceae, Poaceae, and Fabaceae are leading. Perennial polycarpic grasses especially long-rhizome (21,7%) and tap-root (15,0%) dominate among biomorphs (69,2%). Species with wide ranges are of paramount importance, they are Euro-West Asian (30,9%), Eurasian (27,5%), Holarctic (11,7%) and the percentage of alien species is 8,5%. Ruderal (36,7%), meadow (17,5%) and humid meadow (11,7%) species are leading in the ecological-coenotic spectrum. The adventive flora is represented by 16 species and it is briefly analyzed. Valley floras of some other Middle Volga rivers have been compared.


2006 ◽  
Vol 22 (3-4) ◽  
pp. 129-135
Author(s):  
Zorica Nesic ◽  
Zorica Tomic ◽  
M. Zujovic ◽  
Dragana Ruzic-Muslic

Meadows and pastures are important resource of livestock feeds in mountain regions and all plant species on them don?t have same value as livestock feeds. From aspect of food value for livestock all species fundamentally can distribute as useful and harmful plants. In paper are represent two plant associations of Stara Planina Mountain Festucetum vallesiacae and Agrostietum vulgarae. In this associations, besides useful plants, are defined, harmful plant species, there present in associations and all of it in aim of ascertainment measures for their removal or reduction from sward. Group of harmful plants is segmented on three subcategory: bed and worthless plants, harmful and poorly poisons and very poisons plants. Association Festucetum vallesiacae count 75 plant species and of that, category bed and worthless plants belong 26 plants or 34.7 g kg-1, category harmful and poorly poisons belong 8 or 10.6 g kg-1, while category very poisons plants default. Association Agrostietum vulgare count 47 plant species and of that category bed and worthless plants belong 17 or 36.17 g kg-1, category harmful and poorly poisons just one plant or 2.13 g kg-1 and category very poisons plants default too.


2013 ◽  
Vol 82 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Anna Koczur ◽  
Paweł Nicia

<p>The species composition of vegetation associated with the Carpathian fens primarily depends on the type of water present and the hydrological feeding of the soils that occur there. These, in turn, shape the fertility of the fens. Those with typically formed <em>Carici-Agrostietum caninae</em> and <em>Valeriano-Caricetum flavae</em> fundamentally differ in the properties of their soils and feeding waters. These include differences in mineral content, pH, CaCO<sub>3</sub> levels, degree of peat decomposition, electrical conductivity and oxygenation of the waters that feed the fens. <em>Carici-Agrostietum caninae</em> is a homogenous plant association adapted to extreme habitat conditions. It is characterized by a very narrow range of essential soil and feeding water parameters. <em>Valeriano-Caricetum flavae</em> is a highly diverse association. Considerable diversity both in terms of plant species and vegetation structure reflects very wide ranges in the properties of soil and feeding water. Vegetation patches of transitory character were also identified. These contained plant species characteristic of both associations. The character of the vegetation depends mainly on fen soil pH and the degree of mineralization of the feeding waters. It is only these parameters that allow intermediate patches to be clearly distinguished. The degree of peat decomposition, mineral content and water oxygenation all differ for <em>Carici-Agrostietum caninae</em> and <em>Valeriano-Caricetum flavae</em>, whereas the values for intermediate patches display a range of parameters typical of both investigated associations. Consequently, vegetation present in these patches reflects to a greater or lesser extent one of the two analyzed plant associations.</p>


2013 ◽  
Vol 41 (1) ◽  
pp. 125-138 ◽  
Author(s):  
Kinga Mazurkiewicz-Zapałowicz ◽  
Mariola Wróbel ◽  
Artur Silicki ◽  
Maria Wolska

During the vegetation seasons in years 2004-2005 the health state of rush plant species from <em>Phragmition</em> and <em>Magnocaricion</em> alliances around the Lake Glinno was investigated. From 13 plant species with disease symptoms 94 species of fungi and FLO were isolated. The highest mycological biodiversity was stated in <em>Phragmitetum australis</em> (24 species) and <em>Thelypteridi-Phragmitetum</em> (27 species) plant associations. The host species in which the biggest number of fungi and FLO species was observed were: <em>Phragmites australis</em> (37 species) and <em>Carex acutiformis</em> (25 species). The highest mycological similarity based on the Jaccard-Sörensen coefficient occurred between <em>Caricetum acutiformis</em> and <em>Glycerietum maximae</em> plant associations (50%) whereas the lowest value of the coefficient represented <em>Glycerietum maximae</em> and <em>Phalaridetum arundinaceae</em> associations (7%).


2015 ◽  
Vol 76 (3) ◽  
pp. 273-296 ◽  
Author(s):  
Magdalena Mijal

Abstract The strictly protected Hacquetia epipactis, which natural range has its north-eastern limit in the area of the Cieszyńskie Foothills, is one of the most interesting rarities of Polish flora. For one and a half centuries H. epipactis was popular with scientists resulting in a relatively high number of papers addressing this plant. Usually, however, the characteristics of sites where H. epipactis occurs have been overlooked by the researchers. The aim of this work was to fill this gap, at least partly, by determining plant associations that are preferred by this species. Based on previous phytosociological records and by implementing numerical classification methods, it was found that the Hacquetio-Fraxinetum excelsioris Marinček 1990, which is divided into two subassociations (typicum and allietosum with other variants), is the main association in which this plant species occurs. In isolated sites, mostly outside the Cieszyńskie Foothills, it also appears in fragments of Galio sylvatici-Carpinetum betuli Oberd. 1957 and Tilio cordatae-Carpinetum betuli Tracz. 1962 associations.


2011 ◽  
Vol 7 ◽  
pp. 163-176 ◽  
Author(s):  
Anna Cwener ◽  
Marcin Nowak

This paper presents floristic characterization of xerothermic plant associations and analysis of changes of flora within Broczówka steppe reserve. The floristic research was carried out in 2004-2009. Numerous species that were noted here almost 30 years ago were not found in the present study, the size of other populations decreased. Nevertheless, many plant species occurring in the reserve are rare, endangered or protected. Six major plant associations, impoverished form of two ones and one plant community are distinguished in the whole area of the reserve. Occurrence of two plant associations was not confirmed.


Bothalia ◽  
1992 ◽  
Vol 22 (1) ◽  
pp. 93-109 ◽  
Author(s):  
J. P. Roux ◽  
P. G. Ryan ◽  
S. J. Milton ◽  
C. L. Moloney

The physiography and climate of Inaccessible and Nightingale Islands are briefly discussed. The vegetation and the major plant associations are described. Notes are given on the ecology and distribution of each taxon. Taxa newly recorded for Inaccessible Island include Agrostis goughensis, A.holgateana, A. wacei, Calamagrostis deschampsiiformis, Carex thouarsii var.  recurvata, Conyza albida, Elaphoglossum campylolepium and  Uncinia meridensis. One species, C.  albida, is alien to the Tristan group. Two native ferns Asplenium platybasis var.  subnudum and Blechnum australe were found on Nightingale Island for the first time, and the presence of introduced Malus domestica orchards was recorded. Two unidentified taxa were found that may represent new species:  Elaphoglossum sp. at Inaccessible Island and Apium sp. at both Inaccessible and Nightingale Islands. The total number of vascular plant species recorded at Inaccessible and Nightingale Islands now stands at 98 and 43, respectively, of which 26 (28%) and seven (16%) are introduced species. Only Airiplex plebeja and two species of Cotula occur at Nightingale Island but are absent from Inaccessible Island.


Author(s):  
Zorica Voşgan ◽  
Roxana Vidican ◽  
Lucia Mihălescu ◽  
Monica Marian ◽  
Stela Jelea ◽  
...  

This paper presents karyology aspects of the diploid and polyploid species frequency on the mountain pastures in the southwestern Gutai Mountains as well as the calculation of the diploid index. The phytocoenosis of the five plant associations identified on pasture were studied: Violo declinatae-Nardetum, Simon 1966, Agrostietum stoloniferae, (Ujvárosi 1941) Burduja et al. 1956, Scirpetum sylvatici, Ralski 1931, Maloch 1935 em. Schwick 1944, Calthetum laetae, Krajina 1933, Campanulo abientinae-Vaccinietum myrtilli, (Buia et al. 1962) Boşcaiu 1971. Karyotypes were taken for all encountered vegetal species to achieve an accurate cytoaxonomic analysis. The frequency of polyploid species was found in the five vegetal associations that were identified and studied in karyology terms. The number of polyploids, comprised between 52.94-75%, is ahead of the diploids number comprised between 25-43,75%, in the vegetal associations phytocoenosis of the mountainous region. Diplo-polyploid plants and those with an unknown karyotype have lower participation. The calculated value of the diploid index decreases with the increasing of the altitude, with subunit values between 0.33 - 0.82. Diploid index (DI) indicates instable character of vegetal formations of above-mentioned area, reflecting completely station conditions of the grassland. The genetic structure of the phytocoenosis and vegetal associations studied seen from the perspective of karyotypes, indicates a drop in the dioloid index value with the increasing of the anthropo- zoogen factor (excessive grazing).


2014 ◽  
Vol 1 (2) ◽  
Author(s):  
Inayat Ullah Malik ◽  
Abul Hasan Faiz ◽  
Fakhar -i- Abbas

Shakarparian is known for its scenic beauty and wilderness and has a significant recreational value. It is a part of Margalla Hills National Park (MHNP), Islamabad and can be a good recourse to conduct various environmental studies. This study was aimed to explore the overall biodiversity of Shakarparian forest in terms of flora and its associated fauna. Phytosociological survey was carried out in order to identify the existing plant communities. The plant associations were then correlated to the existing fauna of the area. The results will provide the baseline data to support further studies on biodiversity analysis of ecologically rich natural recourse base of our country. A total of 155 Animal species have been observed in the study area. Out of these species 23 species of Mammals, 104 of Birds, 22 of Reptiles and 6 species of Amphibians have been recorded. The dominating plant species of the zone are Cassia fistula, Carrisa apeca, and Lantana camara.


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