scholarly journals Economic valuations composition, structure and floristic diversity in a semi-deciduous mesoxerophytic forest of Schinopsis balansae Engl., Ecoregion Humid Chaco, Paraguay

2021 ◽  
Vol 23 (2) ◽  
pp. 101-110
Author(s):  
María Laura Quevedo Fernández ◽  
Lidia Pérez de Molas ◽  
William Tomaz Folmann ◽  
Stella Amarilla Rodríguez ◽  
Lila Gamarra Ruiz Díaz ◽  
...  
Keyword(s):  
Floristic Diversity ◽  
Schinopsis Balansae ◽  
Composition Structure

scholarly journals COMPOSIÇÃO, SIMILARIDADE E ESTRUTURA DO COMPONENTE ARBUSTIVO-ARBÓREO DE ÁREAS DE CAATINGA

Nativa ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 314-322
Author(s):  
Alex Da Silva Barbosa ◽  
Alberício Pereira de Andrade ◽  
Leonardo Pessoa Félix ◽  
Ítalo De Souza Aquino ◽  
João Henrique Constantino Sales Silva
Keyword(s):  
Plant Material ◽  
Ground Level ◽  
Native Vegetation ◽  
Herbarium Specimens ◽  
Floristic Diversity ◽  
Floristic Similarity ◽  
Management Actions ◽  
Representative Species ◽  
Conservation Of Genetic Resources ◽  
Composition Structure

Os fragmentos de caatinga constituem áreas que necessitam de estudos buscando subsidiar ações de manejo e conservação desses habitats. O objetivo deste estudo foi analisar a florística e a estrutura de três áreas de caatinga localizadas nos municípios de Campina Grande, Boa Vista e Monteiro - PB. Em cada área foram plotadas 100 parcelas de 100 m2, sendo amostrados e etiquetados todos os indivíduos de porte arbustivo-arbóreo com circunferência ao nível do solo ≥ 9 cm e altura total ≥ 1 m. Todo o material vegetal foi coletado e enviado para identificação no Centro de Ciências Agrárias (CCA/UFPB) “Herbário Jayme Coelho de Moraes” (EAN), por meio de comparação com exsicatas e literatura especializada. O processamento dos dados para obtenção dos descritores fitossociológicos e similaridade florística foi realizado no programa Mata Nativa 2®. As famílias mais representativas nas áreas foram Euphorbiaceae, Fabaceae e Cactaceae, sendo as espécies mais representativas Croton blanchetianus Baill., Poincianella pyramidalis (Tul.) L.P. Queiroz., Mimosa ophthalmocentra Mart. ex Benth. e Tacinga palmadora (Britton Rose) N. P. Taylor Stuppy. A caatinga de Monteiro apresentou maior diversidade florística (H’=2,3 nats. ind.-1) e melhor estado de conservação do patrimônio genético autóctone em relação às áreas de Campina Grande (H’=1,98 nats. ind.-1) e Boa Vista, PB (H’=1,78 nats. ind.-1). As áreas de caatinga apresentam algum grau de intervenção antrópica. Todas as áreas são similares floristicamente.Palavras-chave: florística; fitossociologia; vegetação nativa. COMPOSITION, STRUCTURE AND SIMILARITY OF COMPONENT SHRUB-ARBOREAL OF CAATINGA AREAS ABSTRACT:The caatinga's fragments areas still need of studies to support management actions and conservation of their habitats. The aim of this study was to analyze the floristic and structure of three caatinga's areas in the counties of Campina Grande, Boa Vista and Monteiro - PB. In each area were plotted 100 plots with 100 m2, being sampled and tagged all individuals of shrub-tree with a ≥9cm circumference at ground level and ≥1m height. All the plant material was collected and sent for identification at the Center for Agricultural Sciences (UFPB/CCA) "Herbarium Jaime Coelho de Moraes" (EAN), by comparison with herbarium specimens and literature. Data processing to obtain the phytosociological descriptors and floristic similarity was performed by using the Mata Nativa 2® program. The most representative families found in these three locations were Euphorbiaceae, Fabaceae and Cactaceae, being the most representative species identified were: Croton blanchetianus Baill., Poincianella pyramidalis (Tul.) L.P. Queiroz., Mimosa ophthalmocentra Mart. ex Benth. and Tacinga palmadora (Britton Rose) N.P. Taylor Stuppy. The caatinga of Monteiro showed greater floristic diversity (H'= 2.3 nats.ind.-1) and better state of conservation of genetic resources in relation to autochthonous areas when compared to  Campina Grande (H' = 1.98 nats.ind.-1) and Boa Vista, PB (H'= 1.78 nats.ind.-1). The caatinga areas have some degree of human intervention. All areas are similar floristically.Keywords: floristic; phytosociology; native vegetation.

scholarly journals Composition, structure and floristic diversity in dense rain forest in the Eastern Amazon, Amapá, Brazil

2015 ◽  
Vol 37 (4) ◽  
pp. 419 ◽  
Author(s):  
Marcelo De Jesus Veiga Carim ◽  
José Renan da Silva Guimarães ◽  
Luciedi De Cássia Leôncio Tostes ◽  
Luís Roberto Takiyama ◽  
Florian Wittmann
Keyword(s):  
Rain Forest ◽  
Floristic Diversity ◽  
Composition Structure

SHS in the Si–CO2 System: Composition/Structure of Combustion Products

2020 ◽  
Vol 29 (3) ◽  
pp. 138-142
Author(s):  
T. V. Barinova ◽  
V. Yu. Barinov ◽  
V. N. Semenova ◽  
I. D. Kovalev
Keyword(s):  
Combustion Products ◽  
System Composition ◽  
Composition Structure

Vegetation of sandy coasts of Lake Baikal

2016 ◽  
pp. 46-66
Author(s):  
Тю Фю Dulepova
Keyword(s):  
Lake Baikal ◽  
Lake Basin ◽  
Floristic Diversity ◽  
Southern Siberia ◽  
Irkutsk Region ◽  
Relief Formation ◽  
The Republic ◽  
River Valleys ◽  
High Degree ◽  
Semiarid Conditions

The aeolian processes play an important role in the relief formation under the semiarid conditions of the intermountain basins of Southern Siberia. Ancient sand landforms occur in different regions of Siberia — the Ob, Chuya, Аley, Yenisei, Аngara, Selenga, Chikoy, Khilok and Chara river valleys and Lake Baikal coasts. The sandy coasts of Lake Baikal are of great interest in terms of floristic diversity determined by a high degree of endemism. Despite centuries of study of the lake basin, sand vegetation is poorly described in the literature. This study presents an analysis of 184 relevés of psammophytic vegetation from the Republic of Buryatia (Severobaikalsky, Barguzinsky, Pribaikalsky districts) and Irkutsk region (Olkhon Island) obtained in 2009–2014.

Strengthening coatings on cutting tools (analytical review of international conference literature)

2020 ◽  
pp. 234-240
Author(s):  
V.A. Levchenko ◽  
Yu.V. Panfilov
Keyword(s):  
Cutting Tools ◽  
International Standards ◽  
Structure And Properties ◽  
International Conference ◽  
Analytical Review ◽  
Composition Structure ◽  
Analytical Equipment

Tendency of strengthening coatings on cutting tools processes evolution is analyzed. Manifold of strengthening materials, strengthening coatings deposition methods, process and analytical equipment for coatings manufacture and measurement of it’s properties is described. International standards for strengthening coatings on cutting tools composition, structure and properties are presented.

Floristic Diversity and Fundamental Features of Wild Seed Plants in Jiangxi Province

2012 ◽  
Vol 30 (1) ◽  
pp. 22
Author(s):  
Xian-Lan DENG ◽  
Yang WU ◽  
Yu-Cheng LIU ◽  
Zhuo ZHENG
Keyword(s):  
Jiangxi Province ◽  
Seed Plants ◽  
Floristic Diversity ◽  
Wild Seed

Nanostructured powders based on aluminum reinforced by silicon nitride designed for spraying of multifunctional strengthened coatings

2019 ◽  
pp. 65-73
Author(s):  
T. I. Bobkova ◽  
B. V. Farmakovsky ◽  
N. A. Sokolova
Keyword(s):  
Silicon Nitride ◽  
Composite Powder ◽  
High Energy ◽  
Cold Gas Dynamic Spraying ◽  
Powder Materials ◽  
Structure And Properties ◽  
Gas Dynamic ◽  
Composition Structure ◽  
New Phase ◽  
Nanostructured Powders

The work deals with topical issues such as development of composite nanostructured powder materials. The results of creating powders based on the system “aluminum–nitride of silicon” are presented. Complex investigations of the composition, structure and properties of powder materials, as well as coatings formed on their basis by supersonic cold gas dynamic spraying, were carried out. It has been found that the high-energy treatment of a powder mixture of aluminum with nanofibers of silicon nitride provides the formation of a composite powder in which a new phase of the Si(1-х)AlхO(1-х)Nх type is formed, which additionally increases the hardness in the coatings to be sprayed.

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