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

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]

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Mark S. Pearce ◽  
Peter W. James ◽  
Maria Franco-Villoria ◽  
Kathryn N. Parkinson ◽  
Angela R. Jones ◽  
...  

Objective. A number of measures of childhood adiposity are in use, but all are relatively imprecise and prone to bias. We constructed an adiposity index (AI) using a number of different measures.Methods. Detailed body composition data on 460 of the Gateshead Millennium Study cohort at the age of 6–8 years were analysed. The AI was calculated using factor analysis on age plus thirteen measures of adiposity and/or size. Correlations between these variables, the AI, and more traditional measures of adiposity in children were investigated.Results. Based on the factor loading sizes, the first component, taken to be the AI, consisted mainly of measures of fat-mass (the skinfold measurements, fat mass score, and waist circumference). The second comprised variables measuring frame size, while the third consisted mainly of age. The AI had a high correlation with body mass index (BMI) (rho = 0.81).Conclusions. While BMI is practical for assessing adiposity in children, the AI combines a wider range of data related to adiposity than BMI alone and appears both valid and valuable as a research tool for studies of childhood adiposity. Further research is necessary to investigate the utility of AI for research in other samples of children and also in adults.


1958 ◽  
Vol 90 (9) ◽  
pp. 538-540 ◽  
Author(s):  
C. C. Smith

The fall cankerworm, Alsophila pometaria (Harr.), and the winter moth, Operophtera brumata (Linn.), both feed to a great extent on the same tree species and prefer apple, Malus spp., red oak, Quercus rubra L., basswood, Tilia spp., white elm, Ulmus americana L., and Norway maple, Acer platanoides L. They also have similar life-histories and habits (Smith 1950 and 1953). Both lay their eggs on the trees in the fall and overwinter in this stage. The eggs hatch about the same time and the larvae of (both species mature about the third week in June. They drop to the ground and form cocoons at a depth of about an inch. The adults emerge about the same time, commencing usually during the last week in October and continuing until early December or until the ground freezes.


2020 ◽  
Vol 21 (7) ◽  
Author(s):  
ARIDA SUSILOWATI ◽  
DENI ELFIATI ◽  
HENTI HENDALSTUTI RACHMAT ◽  
KUSUMADEWI SRI YULITA ◽  
ADI NURUL HADI ◽  
...  

Abstract. Susilowati A, Elfiati D, Rachmat HH, Yulita KS, Hadi AN, Kusuma YS, Batu SAL. 2020. Vegetation structure and floristic composition of tree species in the habitat of Scaphium macropodum in Gunung Leuser National Park, Sumatra, Indonesia. Biodiversitas 21: 3025-3033. Scaphium macropodum (Miq.) Beumee Ex K Heyne is a member of Malvaceae tree species and globally recognized as malva nut and locally known as ‘kembang semangkok’, ‘tempayang’, ‘merpayang’ or ‘kepayang’. The nut of S. macropodum has many benefits for medicinal purposes, yet destructive extraction of this tree species has led them to extinction. Among its natural distribution in Indonesia, North Sumatra Province, Indonesia is known as its original range, but there is limited information about the existence of this species. This study aimed to determine the vegetation structure of some tree species in the habitat of S. macropodum in Sikundur, Gunung Leuser National Park, Sumatra, Indonesia. Purposive sampling technique was employed by creating line transect at some forest areas where the population of S. macropodum is known to grow naturally. Four line transects with each transect consisting of five plots with nested plots within were established to record data at four growth stages, resulting in 80 plots in total. The results showed that the Important Value Index (IVI) of S. macropodum within the floristic community at the studied area was 21.98, 13.85, 27.30, and 39.60 for tree, pole, sapling, and seedlings stages, respectively. The Shannon-Wiener Diversity Index (H) were 3.80, 3.70, 3.06 and 2.45, Index of evenness (E) are 0.94, 0.92, 0.86, 0.77 and the Index of Richness (R) are 11.76, 10.73, 6.59, 4.10 for tree, pole, sapling, and seedlings stages. This result suggests that the natural population of S. macropodum in Sikundur forest was still in good condition at all stages from tree to seedling.


2020 ◽  
Vol 2 (1) ◽  
pp. 1-6
Author(s):  
Syed Rashid Ali

This paper examines the pattern, sources and growth of remittances to Pakistan. It analyses the growing trend of remittances and share of remittances to GDP over the period 1972-2014. We use the kinked exponential model (Boyce, 1986, 1987) to estimates the growing trend of remittances in Pakistan. The results show that remittances received by Pakistan have three distinct growth phases over the study period – Phase I (1973 – 1983), Phase II (1984 – 2000) and Phase III (2001 – 2014). The remittances received by Pakistan have positive growth during the first and the third period while the second period shows negative growth. Before globalization, the UK was the major source of remittances to Pakistan but after globalization, the sources of remittances to Pakistan have been cantered on Saudi Arabia, the UAE, and other Gulf countries.


2010 ◽  
Vol 62 (2) ◽  
pp. 363-372
Author(s):  
Zorica Tomic ◽  
Zorica Bijedic ◽  
Dragica Vilotic ◽  
D.P. Gacic

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>


2012 ◽  
Vol 433-440 ◽  
pp. 1967-1970
Author(s):  
Jun Chen ◽  
De Shan Tang

The Retail Chain Enterprises implement the strategy of channel to sink to set up shops in third and fourth cities. A reasonable and scientific choice of order of priority must be made when the enterprises entering those cities. This article adopts the approach of the Factor Analysis and duster Analysis the analysis 72 cities (including county-level cities) according to purchasing power index, and to explore how Retail Chain Enterprises to make the market of third and fourth their cities in Guangdong province. The conclusion that is the order of decision ——making to enter into the third and fourth tier cities, which has important guiding significance.


2020 ◽  
Vol 12 (16) ◽  
pp. 6320 ◽  
Author(s):  
Radisav Dubljević ◽  
Božidarka Marković ◽  
Dušica Radonjić ◽  
Danijela Stešević ◽  
Milan Marković

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).


2013 ◽  
Vol 59 (No. 7) ◽  
pp. 293-299 ◽  
Author(s):  
O. Kutnohorská ◽  
P. Tomšík

Organic foods are grown using the principles of organic agriculture that are produced, processed and packaged without using chemicals. They have been accepted due to their several perceived benefits over the conventional food. Health aspects of organic food are, in addition to the ethical, environmental, hedonic and &ldquo;feel good&rdquo; aspects, the main benefits that the consumers appreciate in organic food. This paper presents the results of a quantitative survey in the Czech organic food market. By using the factor analysis, it showed that the consumer perception of the health benefits of organic food can be viewed from several different angles. There were found three factors that explain 58.42% of variability, which are, based on their relationship with the original items, interpreted as the &ldquo;knowledge and responsibility&rdquo;, &ldquo;being aware, but lax&rdquo; and &ldquo;health is important, but not related to food&rdquo;. The first factor contains enough knowledge related to the health care, the conviction of the importance of food choice regarding health and the active interest and effort to do something for one&rsquo;s health. The second factor contains enough knowledge related to health care, but is lacking the interest to apply the knowledge and to do something for one&rsquo;s health, and the third factor contains the conviction that health is an important asset, but the perception of the connection between one&rsquo;s health and food is absent. &nbsp;


2020 ◽  
Vol 13 (1) ◽  
pp. 43
Author(s):  
Fibriyani Nur Aliya

Abstrak. Personal branding seorang eksekutif merupakan proses menjaga identitas, reputasi, dan citra publik seseorang. Mantan Ketua Umum PSSI, Edy Rahmayadi, menerima petisi online yang memaksanya mundur. Petisi online tersebut dipicu oleh maraknya pemberitaan di media massa dan media sosial. Meme kontroversial yang dibuat oleh Edy menanggapi pertanyaan jurnalis dibuat dan disebarluaskan di internet. Diketahui bahwa pengguna internet didominasi oleh pengguna internet. Berdasarkan hal tersebut, maka penelitian ini bertujuan untuk menganalisis faktor personal branding Edy Rahmayadi dalam pandangan kaum milenial sebagai pengguna internet dan media sosial terbesar. Variabel origin yang digunakan dalam penelitian ini. adalah Authentic Personal Branding variable. Hasil penelitian menunjukkan empat faktor baru terbentuk, yaitu Mampu menjelaskan sebelas faktor asal dan faktor personal branding pembentuk Edy Rahmayadi, Faktor pertama adalah Faktor Keunggulan, faktor kedua adalah Faktor Inovasi, Faktor ketiga adalah Faktor Pakar, dan Faktor keempat adalah Keunikan. Faktor yang menjelaskan variabel asal adalah faktor keunggulan.Abstract. An executive's personal branding is the process of maintaining one's identity, reputation and public image. Former PSSI Chairperson, Edy Rahmayadi, received an online petition that forced him to resign. This is happened when he handled the crisis that occurred in the PSSI organization. The online petition was triggered by the rise of news coverage on him in the mass media and social media. The controversial memes made by Edy in response to journalists' questions were made and disseminated on the internet. It is known that internet users are dominated by millennial generation, where this is directly proportional to social media users. Based on this, this study aims to analyze Edy Rahmayadi's personal branding factors in the view of millennials, as the biggest internet and social media user. The origin variable uses in this study is the Authentic Personal Branding variables. The results shows four new factors formed, which are able to explain eleven origin factors and the personal branding factors forming Edy Rahmayadi. The first factor is the Excellence Factor, the second factor is the Innovation Factor, the third Factor is the Expert Factor, and the fourth Factor is Uniqueness. The most dominant factor explaining the origin variable is the excellence factor.


Author(s):  
S. T. Ebeniro ◽  
M. D. Wali

Tree species information is essential for forest studies such as forest meteorology, botany and ecology, and across the relevant fields new techniques efficient for classifying tree species are desperately in demand. This study assessed tree species composition and classification in a degraded tropical rainforest in Southwest Nigeria. Data was collected from the Olukayode compartment of the study area of size 2 ha. Eight (8) Temporary sample plots of size 50 m x 50 m was laid using systematic line transect at 100 m intervals in the compartment. Hierarchical clustering in SPSS was used to find clusters of patterns in the measurement space. Tree species such as; Eucalyptus cameldulensis, Eucalyptus tereticornis, Khaya ivorensis, Khaya senegalensis,Nauclea diderichi, Terminalia randii, and Terminalia superba with a total frequency of 60 were identified, belonging to 3 different families. At similarity 5.0 from the dendrogram using ward linkage, samples 48 - 6 formed the first cluster, samples 28 - 9 constituted the second cluster while samples 20 - 13 constituted the third cluster. From the dendrogram using centroid linkage, at similarity 5.0, samples 59 - 7 formed the first cluster, samples 32 - 31 constituted the second cluster, and samples 8 - 28 formed the third cluster while the fourth cluster combined samples 17 - 21 which is a combination of trees from the three families. Histogram was used to show the diameter at breast height and total height distribution.


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