scholarly journals Phytocenological research into the meadow associations on forest hunting grounds of Serbia

2010 ◽  
Vol 62 (2) ◽  
pp. 363-372
Author(s):  
Zorica Tomic ◽  
Zorica Bijedic ◽  
Dragica Vilotic ◽  
D.P. Gacic
Keyword(s):  
Life Form ◽  
Floristic Composition ◽  
The Third ◽  
Font Color

The floristic composition of meadow associations within the fenced areas of forest hunting grounds was investigated in the spring of 2008 at three sites: Karakusa (Srem), Miloseva voda (Mt. Sokolovica) and Lomnicka reka (Mt. Veliki Jastrebac), Serbia. At the first location three associations were determined (Agrostio-Juncetum effusi Cinc.1959., Trifolio-Agrostietum stoloniferae L. Mark.1973., and Agrostietum vulgaris. Z. Pavl. 1955 sensu lato.); at the second location Festuco-Agrostietum Horv. (1952) 1982. em Trinajest. 1972., and at the third location Agrostio-Festucetum valesiacae Gajic 1961. Hemicryptophytes were the dominant life form in all the sites (ranging from 61.1 to 72.9%). Also, the presence of 24 floral elements was recorded. The largest number of floral elements was determined at the site of Mt. Sokolovica (17), and the lowest at the third site, Mt. Veliki Jastrebac (9). <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/ABS1801217E">10.2298/ABS1801217E</a><u></b></font>

Plant diversity of Ghorkhod Protected Area, NE Iran

Phytotaxa ◽  
2016 ◽  
Vol 249 (1) ◽  
pp. 118 ◽  
Author(s):  
FARSHID MEMARIANI ◽  
MOHAMMAD REZA JOHARCHI ◽  
HOSSEIN AKHANI
Keyword(s):  
Plant Species ◽  
Protected Area ◽  
Life Form ◽  
Vascular Plant ◽  
Floristic Composition ◽  
Transitional Zone ◽  
Plant Groups ◽  
Wide Range ◽  
Plant Families ◽  
Ne Iran

Ghorkhod Protected Area (GPA) is located in a transitional zone among different biogeographical units in North Khorassan Province, NE Iran. The study area is mainly a mountainous region in western extensions of Khorassan-Kopet Dagh floristic province. We investigated the floristic composition, life form spectrum and phytogeography of the study area through several random collection efforts and 200 vegetation samples (reléves) in selected vegetation types during 2007–2012. A total of 663 vascular plant species belonging to 367 genera and 81 families are recorded as native and naturalized in GPA. Angiosperms and Dicots are among the most diverse plant groups. The richest plant families are Asteraceae (88 species), Poaceae (78), Lamiaceae (45), Brassicaceae (43), Fabaceae (38), and Caryophyllaceae (32). The genera Allium L. (17 species), Astragalus L. (15) and Cousinia Cass. (12) are the richest ones, however, the majority of the species belongs to oligotypic and monotypic genera. Life form spectrum of the study area is dominated by hemicryptophytes (38.9%) and therophytes (23.4%). Allium transvestiens Vved., Agropyron desertorum Schult., Helictotrichon turcomanicum Czopanov and Piptatherum latifolium (Roshev.) Nevski are recorded as new to Iran. The core flora of the area has the Irano-Turanian origin. However, the wide-range and widespread elements are also well represented in the study area. GPA is inhabited by several endemic, rare and narrow-range plant species, indicating the biodiversity importance of the study area in NE Iran.

scholarly journals Application of an electronegative gas as a third component of the working gas in the Geiger-Mueller counter

2018 ◽  
Vol 33 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Luka Perazic ◽  
Cedomir Belic ◽  
Dalibor Arbutina
Keyword(s):  
Dead Time ◽  
Gas Mixtures ◽  
Operating Point ◽  
Gas Mixture ◽  
Electric Discharges ◽  
Tube Model ◽  
The Third ◽  
Similarity Law ◽  
Font Color

In this paper, the application of three-component gas mixtures as a working gas in Geiger-Mueller tubes was considered. In addition to the noble and quenching gas, an electronegative gas is used, at the same time, as the third component of gas mixture. This paper is mostly experimental. The experiments are carried out on the enlarged Geiger-Mueller counter tube model. By applying the similarity law for electric discharges in gases on the model and commercial Geiger-Mueller counting tubes, the model was verified. The obtained results showed that a small percentage of SF6 gas, in the working gas, stabilize operating point of Geiger-Mueller counter tubes and reduce dead time. <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/NTRP1804417E">10.2298/NTRP1804417E</a><u></b></font>

scholarly journals Influence of Changes in Botanical Diversity and Quality of Wet Grasslands through Phenological Phases on Cow Milk Fatty Acid Composition

2020 ◽  
Vol 12 (16) ◽  
pp. 6320 ◽  
Author(s):  
Radisav Dubljević ◽  
Božidarka Marković ◽  
Dušica Radonjić ◽  
Danijela Stešević ◽  
Milan Marković
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Quality Index ◽  
Floristic Composition ◽  
The Third ◽  
Third Phase ◽  
Wet Grasslands ◽  
Phenological Phases

Natural pastures in Montenegro, together with natural meadows, are the most important forage source and comprise 95% of the used agricultural area (UAA). The aim of this study was to estimate the changes in grassland biomass, chemical and floristic composition and fatty acid composition in milk of cows grazed on Agrostis stolonifera semi-natural wet grassland in the Central region of Montenegro. Investigation was conducted during three phenological phases: early vegetative, optimal vegetative and full reproductive phase. The chemical composition of the grassland biomass was changed through the phenological phases. A significant increase during the experimental period in the content of dry matter and crude fibers and a decrease in crude protein content were determined. The pasture community consisted of 52 species, belonging to 19 families. The total amount of plant species classified as excellent, very good and good quality was 7.69%, while medium quality plants amounted to 13.46%, low quality plants to 19.23%, valueless plants to 34.62% and toxic plants to 25%. The total quality index was 4.166. The highest quality index of this community was in the second phenological phase, then in the third phase the lowest quality was in the first phenological phase. According to the floristic composition and biomass quality, this lowland pasture can be qualified as being of moderate to good quality. The content of milk fat, protein and solid non-fat (SNF) was increased from the first to the third vegetation phase, but the differences between the phases were not significant (p > 0.05). The content of a majority of saturated fatty acids (SFAs) also increased, while the total content of monounsaturated fatty acids (MUFAs) was high in the second phase and decreased significantly in the third phase. The content of polyunsaturated fatty acids (PUFAs) was constant in the first two phases, while it significantly decreased in the third phase. The highest content of most of MUFAs and PUFAs was obtained in the second phenological phase. The content of fatty acids in the third phase significantly affected (p < 0.05) by the phenological phase. This research contributes to the improvements in the grazing management of wet grasslands as well as the animal performances (milk yield and quality of milk).

La répartition et la dynamique des principales espèces arborescentes du Bois-de-Saraguay, Montréal (Québec)

1986 ◽  
Vol 64 (5) ◽  
pp. 1027-1038 ◽  
Author(s):  
Gérald Domon ◽  
André Bouchard ◽  
Yves Bergeron ◽  
Claire Gauvin
Keyword(s):  
Factor Analysis ◽  
Tree Species ◽  
Floristic Composition ◽  
Growth Phases ◽  
Association Pattern ◽  
Du Bois ◽  
The Third ◽  
Principal Factors ◽  
Exact Shape ◽  
Abiotic Variables

Reciprocal factor analysis of data obtained from 70 stands in the Bois-de-Saraguay, points to drainage and succession – disturbance as the principal factors governing floristic composition. Successional vectors of the 11 most abundant tree species were also plotted on the ordination. The position of the vectors characterizes the species with regards to the two gradients which were identified. The shape of successional vectors allows the recognition of three classes. The first one includes those species showing an association pattern with other species, which hardly varies during the different growth phases. The second one groups together those with distinctly better reproduction in communities where they are scarce in the tree stratum. The third one regroups those which cannot maintain high densities in the intermediate strata of communities where they are common among trees and seedlings. However, further studies showed that the exact shape of the vectors is also related to abiotic variables, especially drainage modifications. A detailed analysis of these successional vectors allows a better understanding of what determines the occupancy of the study site by the species present. [Translated by the Journal]

The Vegetation Structure and Floral Changes of 5 Years after Restoration of Cheonggyecheon Stream in Korea

2013 ◽  
Vol 726-731 ◽  
pp. 1548-1554 ◽  
Author(s):  
Bon Hak Koo
Keyword(s):  
Vegetation Structure ◽  
Life Form ◽  
Flood Plains ◽  
The Third ◽  
Introduced Plants ◽  
Flow Channels ◽  
Ecological Changes ◽  
Perennial Herbs ◽  
Concrete Materials ◽  
Straight Flow

The result of 5-years monitoring (2006-2010) in Cheonggyecheon stream, 328 floral species were found in 2006. In 2007, 2008, 2009 and 2010, total 446, 444, 471 and 510 species were found respectively. And among them, 233 introduced species were found in 2006, 312 species in 2007, 308 in 2008, 314 in 2009 and 300 in 2010 were found. Hazard species were found 3-5 species during study period. The rapid increasing in introduced plants was surveyed in the early 1stand 2ndyears. It has shown a relatively stable trend since the third year. By life form, herbaceous plants gradually increased in the early year. And annual and biennial herbs were dominated right after restoration and as time went by perennial herbs ratio increased. By family, flora belongs toCompositaefamily that was found most frequently. By section, 3rdand 4thsections constituted by natural genotypes, such as point bars, wide flood plains, riffles, ponds and marshes, were surveyed more species than 1stand 2ndsections constructed by artificial and non-ecological materials, such as concrete materials and narrow and straight flow channels. As a result, in stream restoration for ecological purpose, naturalized river or ecological river formation and management, rapid ecological changes would appear in the early 1stand 2ndyears, and artificial energy were included to reduce species disturbance. In that time, the stream ecosystem could be stabilized after restoration in the early three years or so.

scholarly journals Floristic diversity of beech, fir and spruce forest (Piceo-Fago-Abietetum Colic 1965) in the „Tara“ national park

2010 ◽  
pp. 129-143 ◽  
Author(s):  
Rade Cvjeticanin ◽  
Marijana Novakovic
Keyword(s):  
Plant Community ◽  
National Park ◽  
Life Form ◽  
Floristic Composition ◽  
Life Forms ◽  
Site Conditions ◽  
Floristic Diversity ◽  
Spruce Forest ◽  
Floristic Elements ◽  
Floristic Element

This paper deals with the forest plant community of beech, fir and spruce (Piceo-Fago-Abietetum Colic 1965), which is the most widely distributed plant community on the territory of national park ?Tara?. Spectrum of life forms and floristic elements are specified for this community. Spectrum of life forms shows that hemicryptophytes are the most frequent, with high occurrence of geophytes, which is characteristic of this mesophilous plant community. Spectrum of floristic elements show that centraleuropean floristic element is dominant and that this plant community is under strong influence of subcentraleuropean region. Five subassociations are set apart on the basis of floristic composition and site conditions: typicum, drymetosum, aceretosum, pinetosum silvestrae and vaccinietosum. Spectrum of life forms is made for every subassociation separately in aim to compare their floristic compositions. Subassociations aceretosum and vaccinietosum are characterized by the highest occurence of phanerophytes, and the lowest occurence of this life form is represented in subassociation drymetosum. The highest occurence of geophytes is in subassociation aceretosum, and the lowest in pinetosum silvestrae and vaccinietosum. Occurence of hemicryptophytes is the highest in subassociations drymetosum and pinetosum silvestrae, and the lowest in aceretosum. Subassociation typicum is stable plant community, subassociations drymetosum and vaccinietosum grow on poorer sites, while subassociations aceretosum and pinetosum silvestrae represent degradation of beech, fir and spruce forest (Piceo-Fago-Abietetum Colic 1965).

ECO-FLORISTIC STUDY OF WEED FLORA OF MAIZE CROP IN DISTRICT SWABI,KHYBER PAKHTUNKHWA, PAKISTAN

2020 ◽  
Vol 27 (2) ◽  
pp. 499-506
Author(s):  
Maqsood Anwar ◽  
Naveed Akhtar ◽  
Naveed Akhtar ◽  
Shah Khalid ◽  
Hassan Zeb
Keyword(s):  
Life Form ◽  
Floristic Composition ◽  
Leaf Size ◽  
Single Species ◽  
Size Class ◽  
Maize Crop ◽  
Size Spectra ◽  
Ecological Attributes ◽  
Floristic Study ◽  
Weed Flora

The present study explains floristic composition and ecological attributes characteristics of weeds of maize crop in district Swabi during September-October, 2018. A total of 28 weeds species distributed in 27 genera and 15 families were reported from the selected maize fields of the study area. Out of 15 families, 12 were dicots having (17 genera and 18 species) and 3 were monocots having (10 genera and 10 species). Poaceae was dominant family contributed 8 species. Amaranthaceae (5 spp.) followed by Aizoaceae and Convolvulaceae (2 spp.) each. The rest of 11 families were represented by single species each. Annuals contributed 19 (67.8%) species while perennials shared 9 (32.2%) species. Life-form spectra indicated that therophytes were dominant and abundant life form with 17 (60.7%) species. Leaf size spectra revealed that microphylls were major leaf size class with 12 (42.8 %) species. There were 25 (89.3%) species with simple leaves, 2 (7.1 %) species with compound leaves while 1 (3.6 %) species was represented by dissected leaves.

scholarly journals Distribution Patterns and Floristic Analysis of the Colymbada Tauromenitana (Guss.) Holub Populations in Sicily (Italy)

2014 ◽  
Vol 73 (2) ◽  
pp. 385-410 ◽  
Author(s):  
Saverio Sciandrello ◽  
Sonia D’agostino
Keyword(s):  
Species Richness ◽  
Floristic Composition ◽  
Distribution Patterns ◽  
Vegetation Types ◽  
Ecological Data ◽  
Risk Status ◽  
The Third ◽  
Floristic Analysis ◽  
Components Analysis ◽  
Main Factor

AbstractColymbada tauromenitana(Guss.) Holub (Asteraceae) is a rare paleoendem-ic, chasmophyte species, occurring on calcareous cliffs in the eastern part of Sicily (Italy). The aim of this work is to analyze the structure and floristic composition of theC. tauromenitanacommunity, in order to characterize the diversity of populations in relation to different ecological data. In all, 61 plots were examined. For each plot, the floristic composition and the cover of the species were determined using the standard relevé method. Three vegetation types emerged from canonical components analysis (CCA), correlated to a gradient of environmental conditions ranging from the coast to inland areas. The first group withLomelosia creticaandDianthus rupicolasubsp.rupicolawas correlated to thermo-xerophilous conditions (lower thermo-Mediterranean belt), the second group withSilene fruticosaandColymbada tauromenitanawas linked to thermophilous conditions (upper thermo-Mediterranean belt) and the third withDianthus siculusandOdontites boc-coneiwas correlated to mesophilous conditions (meso-Mediterranean belt). Altitude is the main factor influencing both species richness and floristic composition. The density ofC. tauromenitanais influenced mainly by rainfall. Finally, we propose a new risk status for this rare species.

scholarly journals Technologies and methods of restoration of degraded forage lands of the Central Caucasus

2020 ◽  
Vol 203 (12) ◽  
pp. 35-42
Author(s):  
Irina Soldatova ◽  
Sergey Dzhibilov ◽  
Eduard Soldatov ◽  
Lyudmila Guluyeva
Keyword(s):  
Agricultural Practices ◽  
Floristic Composition ◽  
Dry Weight ◽  
Mineral Fertilizers ◽  
Technical Solution ◽  
Resource Saving ◽  
Mountain Areas ◽  
Simultaneous Application ◽  
The Third ◽  
The Impact

Abstract. The article presents the results of R&D and new units for the restoration of degraded mountain areas. The purpose of the study is the accelerated restoration of the natural phytocenosis and the implementation of measures to improve meadows using these aggregates. The object of the study is the technologies and units developed by the authors for the following operations: cutting bumps, raking stones, sowing grass mixtures with the simultaneous application of mineral fertilizers. The research objectives included: determining the initial floristic composition of a degraded mountain meadow; assessment of the impact of events and agricultural practices on the change in the floristic composition of the grass stand, its productivity and energy intensity; identification of the effectiveness of the application of the developed units when sowing herbs in turf and targeted application of mineral fertilizers. The novelty of the technical solution lies in the fact that new resource-saving methods have been developed to improve mountain fodder land using small-sized universal units. . The tests were carried out at a mountain hospital located on the southeastern exposition of the Dargavskiy depression of the North Ossetia-Alania, at an altitude of 1650 m above sea level with a slope of 10°, in six plots, with a recorded area of 360 m2. Three options in triplicate. The first option is natural seeding, and the second is grass seeding by the aggregate, the third option is grass seeding and low doses of N60P45K20 fertilizers. The plots are located across the slope randomized. It was found that at a concentration of 17.2 MJ of energy in 1 kg of dry matter of feed, the total collection in the control plot was 29.7 GJ, and in the seeded experimental field – 85.3 GJ; the crop of the aboveground fodder mass, when sowing grasses, in the first year of observations amounted to 21.8 c/ha of dry weight, which is 3 times higher than in the control. During the growing season of the third year of observations, the yield in the sown area was 39.2 c/ha of dry weight against 19.3 c/ha in the control.

scholarly journals A floristic study on herbs and climbing plants at Puducherry, South India: an approach to biodiversity conservation and regeneration through eco-restoration

Check List ◽  
2013 ◽  
Vol 9 (3) ◽  
pp. 555 ◽  
Author(s):  
Raja Ponnuchamy ◽  
Arunachalam Pragasam ◽  
Soupramanien Aravajy ◽  
Prakash Patel ◽  
Lipi Das ◽  
...  
Keyword(s):  
South India ◽  
Life Form ◽  
Local Level ◽  
Regional Scale ◽  
Floristic Composition ◽  
Ground Level ◽  
Life Forms ◽  
Evergreen Forest ◽  
Coastal Vegetation ◽  
Climbing Plants

A qualitative floristic exploration with life form classifications and monitoring of flowering and fruiting phenology has been carried out at a restored site near Puducherry, South India in 2009 and 2010. The species were classified into three categories based on their occurrence status, namely, Naturally Occurring, Naturally Regenerated and Introduced. The present study focuses only on two life forms, the Herbaceous and the Climbing plants. The site selected for eco-restoration originally comprised of an eroded and severely degraded landscape with scattered remnant species. However, active human intervention over a thirty year period included the introduction of appropriate plant species and other physical measures to enhance soil fertility and ground water level, and regenerate and conserve the deteriorating typical Tropical dry evergreen forest (TDEF) vegetation. A large number of naturally ccurring herbaceous, climbing species (172) and a consistent number of naturally regenerated species (44) are now observed as a result of eco-restoration. Lowland herbaceous species have also established themselves as a green cover at ground level. At present, parts of the area have fertile soils and rich floristic composition with the herbaceous life form represented by 165 species encompassed in 105 genera and 37 families, and the climbing plants represented by 68 species belonging to 54 genera and 25 families. ‘Genus to family’ and ‘species to genus’ ratios indicate the establishment of diverse vegetation in the study site. Nearly one third of the species have been observed flowering throughout the year and about half of the species were observed fruiting throughout the year. We emphasize that the two fold approach of land and vegetation reclamation has been very effective in helping restore the unique TDEF vegetation at the local level and the same may be extended to help regenerate and conserve the Coromandel Coastal vegetation at the regional scale.

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