Current status of the floristic composition in Wadi Hagul, Northwest Suez Gulf, Egypt

2016 ◽  
Vol 28 (1) ◽  
pp. 81-92
Author(s):  
Mohamed Abdelaal
Keyword(s):  
Floristic Composition ◽  
Current Status ◽  
Suez Gulf

Geobotanical studies at the Caucasus: a review of materials of the International Conference “Flora and conservation in the Caucasus: history and current state of knowledge” (Pyatigorsk, May 22–25, 2019)

2019 ◽  
pp. 91-94
Author(s):  
T. M. Lysenko ◽  
V. Yu. Neshatayeva ◽  
Z. V. Dutova
Keyword(s):  
Plant Communities ◽  
Aquatic Vegetation ◽  
Plant Cover ◽  
Floristic Composition ◽  
Current Status ◽  
Wide Field ◽  
The Caucasus ◽  
International Conference ◽  
Rare And Endangered Species ◽  
Current State

The International conference “Flora and conservation in the Caucasus: history and current state of knowledge” dedicated to the 130-year anniversary of the Perkalsky Arboretum took place at 22–25 of May 2019 in Pyatigorsk (Stavropol Territory) on the base of the Pyatigorsk Museum of local lore and natural history. The participants were from 11 cities of Russia and 7 Republics of the Caucasus and represented 14 institutions. Proceedings of the conference were published by the beginning of the meeting the book of abstracts includes 49 papers on the study of vascular plants, bryophytes, lichens and fungi, plant communities, as well as the protection of rare and endangered species, unique plant communities, and ecological problems in the Caucasus. The following geobotanical topics were highlighted in 13 papers: forest communities (3 reports), meadow and steppe vegetation (2), xeric open forests (2), communities of ecotone areas (1), structure of populations of rare plant species (3), as well as the history and current status of nature protected areas (2). The great emphasis has been focused on the study of floristic composition and plant populations. Thus, the conference showed that very few studies от vegetation are currently carried out in the Caucasus, and a lot of districts are not affected by the research. The greatest attention is paid to forest vegetation while meadow, steppe, alpine heath and xerophytic communities are studied rather poorly. Besides, there are “white spots” — mire, floodplain and aquatic vegetation. In nowadays, when the anthropogenic impact on the plant cover of the Caucasus is intensively increasing, it is especially important to study natural undisturbed communities preserved in protected natural areas. Another important issue is the conservation of the unique vegetation cover of the whole Caucasus. Thus, the study of vegetation of this region opens a wide field for researchers using various methods of modern plant science.

scholarly journals Preliminary taxonomic study on homestead flora of four districts of Bangladesh: Magnoliopsida

2020 ◽  
Vol 27 (1) ◽  
pp. 37-65
Author(s):  
Goutam Kumer Roy ◽  
Saleh Ahammad Khan
Keyword(s):  
Plant Genetic Resources ◽  
Floristic Composition ◽  
Current Status ◽  
Native Plant ◽  
Rauvolfia Serpentina ◽  
Native Plant Species ◽  
Plant Group ◽  
Pterocarpus Santalinus ◽  
Plant Taxon ◽  
Data Book

This study has documented the contemporary taxonomic information on the species of the class Magnoliopsida (Dicotyledons) extant in the homestead areas of Dhaka, Gazipur, Manikganj and Tangail districts of Bangladesh. In these areas, the Dicotyledons are comprised of total 455 species under 302 genera belonging to 78 families. Fabaceae with 41 species is the largest family and Solanum and Lindernia are the largest genera. Total 238 species are herbs followed by 129 species of trees and 88 species of shrubs. Total 332 species are economically useful. The composition and distribution of the species of this plant group are remarkably variable in the homestead areas of the four districts. The current status of seven threatened species viz., Abroma augusta, Andrographis paniculata, Aniseia martinicensis, Mucuna bracteata, Pterocarpus santalinus, Rauvolfia serpentina and Tournefortia roxburghii, included in the Red Data Book of Bangladesh and extant in the study area, has been evaluated and described. This study has identified some threats to the homestead flora and formulated some recommendations for the conservation of threatened and declining native plant species of the study area. The data provided by this study will serve as an important baseline to track the trend of changes in the floristic composition and diversity and sustainable development of plant genetic resources in the homesteads of the study area. Bangladesh J. Plant Taxon. 27(1): 37-65, 2020 (June)

High-altitude vegetation of the Western Carpathians — a syntaxonomical review

Biologia ◽  
2010 ◽  
Vol 65 (6) ◽  
Author(s):  
Ján Kliment ◽  
Jozef Šibík ◽  
Ivana Šibíková ◽  
Ivan Jarolímek ◽  
Zuzana Dúbravcová ◽  
...  
Keyword(s):  
High Altitude ◽  
Plant Communities ◽  
Floristic Composition ◽  
Western Carpathians ◽  
The Arctic ◽  
Current Status ◽  
High Mountain ◽  
Vegetation Survey ◽  
Fourth Volume ◽  
The Individual

AbstractThis paper presents a survey of high-altitude plant communities which occur in the Western Carpathians with an enumeration of the characteristic, transgressive and differential species of the individual alliances, orders and classes. It describes the tall-herb vegetation (Mulgedio-Aconitetea) and communities of the subalpine shrubs (Betulo carpaticae-Alnetea viridis), the montane and alpine calcareous swards (Elyno-Seslerietea), the wind-exposed cryophilous swards on ridge edges with low snow cover (Carici rupestris-Kobresietea bellardii), the chionophilous communities of snow beds and snow fields (Salicetea herbaceae), the arctic-boreal dwarf-shrub heathlands (Loiseleurio-Vaccinietea), the alpine acidophilous grasslands (Caricetea curvulae) and the high-mountain mat-grass swards of the alliance Nardion strictae (Nardetea strictae).This study summarises the results of the syntaxonomical and nomenclatural revisions of various types of high-altitude vegetation in the Western Carpathians and the longstanding research in the field. The aim of this paper is to amass knowledge about the nomenclatural features, such as the synonyms, original diagnoses and nomenclatural types of the higher syntaxa in the Western Carpathians, that will be important and useful for a forthcoming vegetation survey of highrank syntaxa of Europe (EuroChecklist). It reflects the current status of knowledge regarding the floristic composition and distribution of high-altitude (alpine) non-forest communities in Slovakia.The fourth volume of Plant Communities of Slovakia, which discusses high-altitude vegetation, was recently published. This paper, however, contains some corrections and improvements to the concepts. It is presented in a compact form and in English, which makes it more accessible by international readership.

scholarly journals Current status, utilization, succession and zonation of mangrove ecosystem along Mida Creek, Kenya

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
MARY WANJIRU WARUI ◽  
SHYAM MANOHAR ◽  
PAUL OBADE
Keyword(s):  
Regression Analysis ◽  
Mangrove Forest ◽  
Floristic Composition ◽  
Mangrove Ecosystem ◽  
Current Status ◽  
Mangrove Forests ◽  
Rhizophora Mucronata ◽  
Mangrove Species ◽  
Management Policies ◽  
Ceriops Tagal

Abstract. Warui MW, Manohar S, Obade P. 2020. Current status, utilization, succession and zonation of mangrove ecosystem along Mida Creek, Coast Province, Kenya. Bonorowo Wetlands 10: 32-43. Human activities have resulted in the destruction of mangrove forests, posing a threat to the mangrove ecosystem and the living things that rely on it. From September 2009 through February 2010, researchers studied the current state, usage, succession, and zonation of the mangrove ecosystem along Mida Creek in Kenya's Coast Province. The goals were to assess changes in the floristic composition of the mangrove forest, identify the most preferred mangrove species, investigate whether accessibility determines utilization of mangrove species, investigate whether harvesting of mangroves affects their succession, and investigate the effectiveness of current mangrove forest management policies. The data was collected using the Point-Centered Quarter Method (PCQM) to see if access into the mangrove forest influences their use and if mangrove succession is affected by their use. To evaluate the efficiency of government policies/legislation governing mangrove exploitation and the most favored mangrove species by the local community and other users, questionnaires were circulated and interviews were conducted. Out of the 210 houses in Mida Creek, 136 respondents were interviewed, one from each household. To examine the temporal changes in the floristic composition of the mangrove forest, two sets of aerial images (1992 and 2006) were processed and interpreted. The data from the questionnaires were coded and entered into the Statistical Package for the Social Sciences (SPSS). An analysis of variance (ANOVA) was used to see if the accessibility of mangroves influences their use. To see if the utilization of mangroves affects their succession, researchers used regression analysis. To evaluate the forest structure, an importance value was derived. To summarize the present mangrove forest management policies and their effectiveness, descriptive statistics were used. Between 1992 and 2006, the floristic composition of the mangrove forest in Mida Creek changed; the area covered by mangroves decreased as follows: Rhizophora mucronata (Rm); 65.09-63.93ha; Avicennia marina (Am); 344.99-310.63ha; Ceriops tagal (Ct); 225.12-223.82ha; Rm and Ct; 52.87-50.22ha; Ct and Am; 143.69- 140.29ha; Rm and Am; 44.36-41.27ha; Rm and Bg; 212.75-199.75ha; Rm and Sonneratia alba (Sa); 47.64-46.32ha; Rm, Ct and Bruguiera gymnorrhiza (Bg); 129.07-128.12ha; Rm, Am, Ct, and Bg; 472.44-428.46ha. The number of cut mangroves in the adjacent settlements, center, and shoreline revealed a significant difference (F=3.277; df=2; p=0.040) in the ANOVA test, indicating that accessibility determines consumption. The most favored mangrove species was Rhizophora mucronata, according to the findings. There was a correlation between the number of mangrove seedlings and the number of cut mangroves (F=8.529, df=1, R=0.198, P=0.004), according to regression analysis. The use of mangroves has an impact on their succession. Mangrove utilization policies and legislation have been less effective. The key species in Mida Creek were Rhizophora mucronata and Ceriops tagal. The extent of mangrove forests in Mida Creek has shrunk over time.  

scholarly journals PHYTOSOCIOLOGICAL ATTRIBUTES – TOOLS FOR DETERMINING THE CURRENT STATUS OF PASTURE LAND IN JAKKANARI BEAT, SIRUMUGAI RANGE, WESTERN GHATS, COIMBATORE DISTRICT

2017 ◽  
Vol 4 (3) ◽  
pp. 75-85
Author(s):  
Veena B ◽  
Anusuya Devi R ◽  
Ganeshan C.M ◽  
Paulsamy S ◽  
Thenmozhi K
Keyword(s):  
Western Ghats ◽  
Terrestrial Ecosystem ◽  
Floristic Composition ◽  
Current Status ◽  
Entire Study ◽  
Coimbatore District ◽  
Community Types ◽  
Ecological Importance ◽  
Composition Structure ◽  
Entire Study Area

The aim of this investigation was to study the species composition structure and phytosociological characters like frequency, density, dominance, abundance and their relative values and important values index (IVI) of Jakkanari beat located in Sirumugai Range, Coimbatore district. Phytosociological analyses were performed for 5 plots, each 150 m2. Subanalysis was performed for 5sq km. of the 141 species found in the study area the maximum ecological importance was attributed to the herb. The present floristic composition of the community types, which showed a high density of unpalatable species, suggests that intensive grazing has become a widespread problem across the entire study area. The result adds a new and important contest of understanding on the effect of plant diversity on  ecosystem services and functioning in terrestrial ecosystem.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Electron-deficient boron-based catalysts for C–H bond functionalisation

2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou
Keyword(s):  
Review Article ◽  
Current Status ◽  
Comprehensive Overview

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.

Sign in / Sign up

Export Citation Format

Share Document