scholarly journals IMPACT OF VOLCANIC AHSFALLS ON THE SPECIES DIVERSITY OF VASCULAR PLANTS IN LARCH FORESTS OF THE KLYUCHEVSKAYA VOLCANO GROUP (KAMCHATKA)

2019 ◽  
pp. 63-72
Author(s):  
T.L. Nekrasov ◽  
◽  
A.P. Korablev ◽  
Keyword(s):  
Species Diversity ◽  
Vascular Plants ◽  
Larch Forests

scholarly journals PHYTOSOCIOLOGICAL ANALYSIS AND FLORISTRIC DIVERSITY OF VANEESWARAM KAVU IN KANNUR DISTRICT, KERALA

2017 ◽  
Vol 4 (2) ◽  
pp. 19-23
Author(s):  
Jeeshna M.V
Keyword(s):  
Quantitative Analysis ◽  
Species Diversity ◽  
Medicinal Plants ◽  
Vascular Plants ◽  
Quantitative Approach ◽  
Sacred Grove ◽  
Sacred Groves ◽  
Conservation Of Biodiversity

Sacred groves act as a treasure house for rare and medicinal plants. Apart from the quantitative analysis quantitative approach to sacred grove gives the potential species and importance of sacred grove, which is the main focuses of this work. There are many sacred grooves are present at Kannur district in whichVaneeswaram Kavu is one of the important one. The flora of sacred groves of has analysed taxonomically and phytosociologically. A total of 64 vascular plants falling under 61 genera and 43 families were documented. About 12 species are reported in the red listed category. In phytosociological studies specieslike, Elaeocarpus serratus, Erycibe paniculata and Scleria lithosperma were showing higher IVI. The devastation of species diversity in the study area represent there is an urgent need for regeneration of the species for conservation of biodiversity.

Terrestrial algae of hypersaline environments of the Central Syvash islands (Kherson Region, Ukraine)

Biologia ◽  
2008 ◽  
Vol 63 (6) ◽  
Author(s):  
Oxana Vinogradova ◽  
Tatyana Darienko
Keyword(s):  
Species Diversity ◽  
Vascular Plants ◽  
Taxonomic Composition ◽  
Hypersaline Environments ◽  
Solonetzic Soil ◽  
Heavy Loam ◽  
Terrestrial Algae ◽  
Oxygenic Phototrophs ◽  
Original Drawings

AbstractIn hypersaline environments of the Churiuk and Kuyuk-Tuk islands located in Central Syvash lagoon (Ukraine) 93 species of oxygenic phototrophs (49 Cyanoprokaryota, 29 Chlorophyta, 12 Bacillariophyta, 2 Xanthophyta, 1 Streptophyta, 1 Eustigmatophyta) are recorded. The sites studied represent four basic types of habitats: semi-terrestrial ecotone (littoral heavy-loam solonchak free of vascular plants), wet gleyic solonchak covered by sparce halophytic vegetation, gleyic solonetz under saline meadow vegetation, and chestnut solonetzic soil with Steppa salsuginosa formation. They differ in the taxonomic composition and species diversity of algae. The highest species diversity is observed at sites of wet gleyic solonchaks (71 species of five divisions), the lowest diversity (23 species belonging to three divisions) in the harsh littoral ecotone. The distribution and abundance of species in the four habitats are discussed with reference to their ecology. Descriptions and original drawings of noteworthy taxa of Chlorophyta and Xanthophyta are presented.

BIODIVERSITY AND INTERSLOPE DIVERGENCE OF VASCULAR PLANTS CAUSED BY MICROCLIMATIC DIFFERENCES AT “EVOLUTION CANYON”, LOWER NAHAL OREN, MOUNT CARMEL, ISRAEL

1999 ◽  
Vol 47 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Eviatar Nevo ◽  
Ori Fragman ◽  
Amots Dafni ◽  
Avigdor Beiles
Keyword(s):  
Natural Selection ◽  
Species Diversity ◽  
Vascular Plants ◽  
Vascular Plant ◽  
Plant Cover ◽  
Life Forms ◽  
Valley Bottom ◽  
Content Sharing ◽  
The North ◽  
Evolution Canyon

Species diversity of plants was recorded in 1992 and 1993 at seven stations of the “Evolution Canyon” microsite. Higher solar radiation on the South-Facing Slope (SFS) causes warm, xeric savannoid formation versus temperate, cool, mesic, dense maquis on the North-Facing Slope (NFS), and riverine, segetal plant formations on the Valley Bottom (VB). In an area of 7000 m2, we recorded 320 vascular plant species in 217 genera and 59 families. Plant cover varied from 35% (SFS) to 150% (NFS). Annuals predominated among all life forms (61.3% of all species). SFS and NFS varied in species content, sharing only 31–18% of species. Phytogeographical types varied among the two slopes and valley bottom. Inter-and intraslope species composition varied drastically due to differential microclimatic stresses, thereby demonstrating at a microscale natural selection in action.

scholarly journals New data on distribution of Cruciferae (Brassicaceae) in Mongolia

Turczaninowia ◽  
2020 ◽  
Vol 23 (4) ◽  
pp. 83-87
Author(s):  
Vladimir I. Dorofeyev ◽  
Enebishiyn Ganbold ◽  
Ulzijchutag Enkhmaa
Keyword(s):  
Species Diversity ◽  
20Th Century ◽  
21St Century ◽  
Vascular Plants ◽  
Field Studies ◽  
Taxonomic Position ◽  
Sinapis Arvensis ◽  
Herbarium Collections

At the end of the 20th century the flora of Mongolia was considered very well examined. At that time V. I. Grubov (1982) had summarized its study. However, later it became clear that the flora can be thoroughly supplemented (Gubanov, 1996). In the 21st century, it became apparent that many areas of Mongolia require new, more thorough research, not only for clarifying their species diversity, but also for more specifically defining the boundaries of botanic-geographical districts. The first major attempts to combine all floristic publications were the “Conspectus of the vascular plants of Mongolia” (2014) and the first volumes of “Flora of Mongolia” (2015) prepared by the Mongolian botanists. But even these works show that Mongolia remains an endless region for the search and study of botanical novelties. One of the results of such critical search and studies of herbarium collections and field studies in 2019 is presented in this publication, which expands our knowledge on the distribution of 14 cruciferous species (Alyssum desertorum, Cardamine hirsuta, C. macrophylla, C. dentata, Chorispora tenella, Erysimum sisymbrioides, Meniocus linifolius, Neslia paniculata, Sinapis arvensis, Sisymbrium volgense, S. brassiciforme, S. loeselii, Thellungiella mollissima, Turritis borealis) and taxonomic position of Alyssum desertorum and Thellungiella mollissima.

The invasion of Bromus erectus alters species diversity of vascular plants and leafhoppers in calcareous grasslands

2018 ◽  
Vol 11 (6) ◽  
pp. 578-586 ◽  
Author(s):  
Dominik Poniatowski ◽  
Florian Hertenstein ◽  
Nadja Raude ◽  
Kathrin Gottbehüt ◽  
Herbert Nickel ◽  
...  
Keyword(s):  
Species Diversity ◽  
Vascular Plants ◽  
Calcareous Grasslands ◽  
Bromus Erectus

scholarly journals Do Diversity and Bio-morphological Spectrum of Psammophytes Matter in Restoring Vegetation of Sand Pits?

2020 ◽  
Vol 169 ◽  
pp. 03005
Author(s):  
Alaa Dabbagh
Keyword(s):  
Species Diversity ◽  
Environmental Factors ◽  
Standard Method ◽  
Vascular Plants ◽  
High Mobility ◽  
Life Forms ◽  
The Russian Federation ◽  
Sand Pits ◽  
Anthropogenic Intervention ◽  
Trees And Shrubs

Open mining of sand is executed in the sand pits. After completion of the work sand pits are usually recultivated: firstly they are graded and then planted with trees and shrubs, but very often sand pits are abandoned to regenerate themselves. The sand pit becomes a source of dust and a hardly healed wound on the earth’s body. In order to provide an adequate revegetation on such substrates, it is necessary to study biomorphological peculiarities of growing plants in a very specific environment characterized by high stiffness of slopes and high mobility of the substrate. The material for our study collected from Moscow Region sand pits in the Russian federation. Plants were collected from both northern and southern exposure slopes. Our work is based on the geobotanical descriptions made according to standard method on experimental sites of 5x5 m2. The results of the undertaken shows that Compositae, Gramineae, Fabaceae are the most representative of the surveyed one hundred twenty seven species of higher vascular plants from 29 families. Diversity on the southern slopes was more than on the northern ones. Species diversity is determined by the successions occurring spontaneously after a rough anthropogenic intervention, under the influence of such environmental factors as lighting, moisture, texture and richness of soil. The spectrum of life forms showed that the overwhelming majority according to K. Raunkiru are hemicryptophytes. Perennial herbaceous polycarpics are dominant in the spectrum of life forms, according to I.G. Serebryakov.

scholarly journals Floristic composition and plant species diversity in and around the brickfield areas of Savar-Dhamrai region of Dhaka district

2021 ◽  
Vol 9 (1-2) ◽  
pp. 91-108
Author(s):  
Saiful Islam ◽  
Shayla Sharmin Shetu ◽  
Md Abdur Rahim ◽  
Saleh Ahammad Khan
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Plant Species ◽  
Vascular Plants ◽  
Floristic Composition ◽  
Natural Vegetation ◽  
Plant Species Diversity

This study has confirmed the occurrence of a total of 181 species of vascular plants under 133 genera and 51 families and estimates the plant species diversity in and around the brickfield areas of Savar-Dhamrai region of Dhaka district. Of these, six species were pteridophytes, 175 were Angiosperms, and 144 species were economically important. Five families, composed of six species, belonged to Pteridophyta, 40 families, consist of 128 species, to Magnoliopsida (dicotyledons) and six families, comprised of 47 species, to Liliopsida (monocotyledons). Total of 161 species were herbs, 14 were shrubs, and only six were trees. Asteraceae with 14 species and Poaceae with 24 species were the largest family in Magnoliopsida and Liliopsida, respectively. Amaranthus L., Persicaria (L.) Mill., Solanum L. and Lindernia All. with four species each were appeared as the best representative genera in Mangoliopsida, while Cyperus L. with five species in Liliopsida. The species composition and diversity of abandoned brickfields were found to be higher than those of functional brickfields. A total of 42 (23.20%) species were common in both abandoned and functional brickfields of this region. Species composition in the abandoned brickfields of Savar and Dhamrai was mostly similar (64.15%). This study suggests to control and monitor the brickfields under the respective authorities to favor the formation and regeneration of natural vegetation in their neighboring areas. Jahangirnagar University J. Biol. Sci. 9(1 & 2): 91-108, 2020 (June & December)

scholarly journals Waldindikatoren zur Artenvielfalt – Erkenntnisse aus LFI und BDM Schweiz | Forest structures and species diversity – Findings from the NFI and BDM

2007 ◽  
Vol 158 (8) ◽  
pp. 243-254 ◽  
Author(s):  
Urs-Beat Brändli ◽  
Christoph Bühler ◽  
Adrian Zangger
Keyword(s):  
Species Diversity ◽  
Vascular Plants ◽  
Monitoring Program ◽  
Stand Density ◽  
Species Group ◽  
National Forest Inventory ◽  
Study Data ◽  
Species Density ◽  
Site Factors ◽  
Forest Inventories

In order to monitor species diversity, surveying indicators in habitats has often been recommended as more cost efficient than assessing species directly. In this study data from the Swiss National Forest Inventory (NFI)and the Biodiversity Monitoring Program (BDM) were used to verify the correlation of species density for vascular plants, mosses, and molluscs with 58 variables of forest structure, site conditions and forest management. The analyses show that site factors, in particular the biogeographic regions, the altitude, slope and the soil acidity,explain 18 to 49% of the observed variance in species density, depending on the species group (taxon). Of all the factors influenced by management, only the availability of light (stand density) was found to play an important role primarily on vascular plants. In addition the density of molluscs is positively correlated to shrub cover. However, none of the regression models tested explains more than 54% of the variance of species density. Therefore, the authors conclude that the species richness of the species groups investigated can be assessed reliably only by direct survey. The analyses confirm that certain data assessed in forest inventories is ecologically very important and relevant for environmental policy.

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