scholarly journals POPULATION DISTRIBUTION AND DIVERSITY OF Pycnanthus angolensis IN RAINFOREST SOUTHWEST, NIGERIA

2019 ◽  
Vol 17 (1) ◽  
pp. 21-27
Author(s):  
O. A. BELLO ◽  
A. O. AKINYELE
Keyword(s):  
Population Distribution ◽  
Local Population ◽  
Forest Area ◽  
High Rate ◽  
Mature Tree ◽  
Mature Trees ◽  
Abandoned Land ◽  
Southwest Nigeria ◽  
Alternative Means ◽  
Sustainable Conservation

Population distributionof Pycnanthus. angolensis was carried out in two locations of three States (Osun, Ekiti and Oyo) due to abundance and availability using direct enumeration. A total of 58 stands of plant viz Osun state 58.93%, Ekiti State 28.57% and Oyo State 12.50% were assessed. Variation occurred  within each State (Osun State: Ila 32.35% >20.59% Olooyo and Mojapa, Gbongan 17.65%, Ile Ogbo 5.88%  and least in Ajaba (2.94%). In Ekiti State, Osan 43.75% > Otun 31.25%.  > 25% Ayetoro Ekiti. In Oyo State, Adewumi, 28.57% > 14.29 %> Idito, Erumu, Sapara (U.I), Mosque (U.I) and Amina (U.I), 39 juvenile and 19 mature trees (flowering and fruiting) varied in ratios 30:6 Osun State, 9:7 Ekiti State and 0:6 Oyo state respectively.  Osun State had the highest number of juvenile trees (30), 9 in Ekiti State and zero juvenile in Oyo state.  Ekiti State had the highest number of mature tree 7> Oyo and Osun (6). Osun State had greater number of juvenile trees than Ekiti and Oyo States. P. angolensis was found growing in fallow or abandoned land, marshy areas, farmland, river side, new site areas and Quarters. P. angolensis could be found on different habitats among the States and within the States.  Given the high rate of forest destruction in the country, there is need to ensure sustainable conservation of the forest area to avoid further destruction by provision of alternative means of livelihood for the local population so as to reduce their dependence on these forest.  

scholarly journals Exploring Ethnicity in Hospital Patients with COVID-19 in South London

The Physician ◽  
2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Anna Zatorska ◽  
Niladri Konar ◽  
Pratyasha Saha ◽  
Alice Moseley ◽  
Jessica Denman ◽  
...  
Keyword(s):  
Odds Ratio ◽  
Population Distribution ◽  
Local Population ◽  
Case Series ◽  
Risk Of Death ◽  
Hospitalised Patients ◽  
Hospital Patients ◽  
The Usa ◽  
The Uk ◽  
The Impact

Ethnicity was found to be an independent risk factor in COVID-19 outcomes in the UK and the USA during the pandemic surge. London, being in the epicentre and having one of the most ethnically diverse population in the UK, was likely to have experienced a much higher intensity of this phenomenon. Black Asian and Minority ethnic groups were more likely to be admitted, more likely to require admission to intensive care, and more likely to die from COVID-19. We undertook an analysis of a case series to explore the impact of ethnicity in hospitalised patients with confirmed COVID-19 during the 3 months of the pandemic. Our results demonstrated that although the proportion of Asian and Black patients were representative of the local population distribution, they were much younger. The prevalence of comorbidities was similar but logistic regression analysis showed that male sex (OR 1.4, 95% CI 1.1-1.9; p=0.02), age (OR 1.03, 95% CI 1.02 - 1.04, p<0.001), those in the ‘Other’ [Odds ratio 1.7 (1.1-2.6) p = 0.01] and ‘Asian’[Odds ratio 1.8 (1.1-2.7) p=0.01], category were at higher risk of death in this cohort. Our results, therefore, are consistent with the overall data from the UK and USA indicating that ethnicity remains a significant additional risk and hence our clinical services must ensure that adequate provision is made to cater to this risk and research must be designed to understand the causes.   

Preliminary ethnobotanical studies of the Rwenzori Mountain forest area in Bundibugyo District, Uganda

Bothalia ◽  
1995 ◽  
Vol 25 (1) ◽  
pp. 111-119 ◽  
Author(s):  
H. Oryem-Origa ◽  
E. K. Z. Kakudidi ◽  
A. B. Katande ◽  
Z. R. Bukenya
Keyword(s):  
Plant Species ◽  
Fruits And Vegetables ◽  
Local Population ◽  
Local Communities ◽  
Forest Resources ◽  
Forest Area ◽  
Mountain Forest ◽  
Plant Biodiversity ◽  
Toilet Paper ◽  
Study Plot

Ethnobotanical studies of the Rwenzori Mountain forest area in Bundibugyo District in Uganda were carried out between May and December 1991, and covered the northern part of the Rwenzori Mountain slopes occupied by the Bakonjo people. The presence of a major footpath through the forest with numerous utility trails radiating from it showed that some forest resources are being sought by the local population. Plant biodiversity is high, as is indicated by the fact that in a study plot of only 4 250 m , a total of 115 plant species, 101 genera and 57 families were identified from a collection of 300 plant specimens. Seventy-seven plant species were found to be of some importance to the local communities. Out of the 77 useful plant species recorded:  22 species were used for medicinal purposes; 16 for firewood; 13 for construction, joinery and furniture;  12 for craftwork; 10 provided edible fruits and vegetables; and 27 were used for a variety of other purposes. These other purposes include construction of shrines, covering of granary floors, use as toilet paper, carry ing luggage, and fodder for goats, sheep and cattle. Arundinaria alpina K. Schum. (bamboo) is the species that is most extensively harvested from the forest.

scholarly journals Population centroids of the world administrative units from nighttime lights 1992-2013

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Ola Hall ◽  
Maria Francisca Archila Bustos ◽  
Niklas Boke Olén ◽  
Thomas Niedomysl
Keyword(s):  
Census Data ◽  
Population Distribution ◽  
Local Population ◽  
Population Changes ◽  
Spatial Unit ◽  
The Past ◽  
Nighttime Lights ◽  
The Mean ◽  
Administrative Units ◽  
True Population

Abstract Knowledge about the past, current and future distribution of the human population is fundamental for tackling many global challenges. Censuses are used to collect information about population within a specified spatial unit. The spatial units are usually arbitrarily defined and their numbers, size and shape tend to change over time. These issues make comparisons between areas and countries difficult. We have in related work proposed that the shape of the lit area derived from nighttime lights, weighted by its intensity can be used to analyse characteristics of the population distribution, such as the mean centre of population. We have processed global nighttime lights data for the period 1992–2013 and derived centroids for administrative levels 0–2 of the Database of Global Administrative Areas, corresponding to nations and two levels of sub-divisions, that can be used to analyse patterns of global or local population changes. The consistency of the produced dataset was investigated and distance between true population centres and derived centres are compared using Swedish census data as a benchmark.

scholarly journals Mapping Changing Population Distribution on the Qinghai–Tibet Plateau since 2000 with Multi-Temporal Remote Sensing and Point-of-Interest Data

2020 ◽  
Vol 12 (24) ◽  
pp. 4059
Author(s):  
Lanhui Li ◽  
Yili Zhang ◽  
Linshan Liu ◽  
Zhaofeng Wang ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Population Density ◽  
Rural Areas ◽  
Population Distribution ◽  
Local Population ◽  
Tibet Plateau ◽  
Point Of Interest ◽  
Tibet Autonomous Region ◽  
Multi Temporal ◽  
Qinghai Tibet Plateau

Advanced developments have been achieved in urban human population estimation, however, there is still a considerable research gap for the mapping of remote rural populations. In this study, based on demographic data at the town-level, multi-temporal high-resolution remote sensing data, and local population-sensitive point-of-interest (POI) data, we tailored a random forest-based dasymetric approach to map population distribution on the Qinghai–Tibet Plateau (QTP) for 2000, 2010, and 2016 with a spatial resolution of 1000 m. We then analyzed the temporal and spatial change of this distribution. The results showed that the QTP has a sparse population distribution overall; in large areas of the northern QTP, the population density is zero, accounting for about 14% of the total area of the QTP. About half of the QTP showed a rapid increase in population density between 2000 and 2016, mainly located in the eastern and southern parts of Qinghai Province and the central-eastern parts of the Tibet Autonomous Region. Regarding the relative importance of variables in explaining population density, the variables “Distance to Temples” is the most important, followed by “Density of Villages” and “Elevation”. Furthermore, our new products exhibited higher accuracy compared with five recently released gridded population density datasets, namely WorldPop, Gridded Population of the World version 4, and three national gridded population datasets for China. Both the root-mean-square error (RMSE) and mean absolute error (MAE) for our products were about half of those of the compared products except for WorldPop. This study provides a reference for using fine-scale demographic count and local population-sensitive POIs to model changing population distribution in remote rural areas.

High rate of mixed and subpatent malarial infections in southwest Nigeria.

1999 ◽  
Vol 61 (2) ◽  
pp. 339-343 ◽  
Author(s):  
J May ◽  
U Bienzle ◽  
C G Meyer ◽  
A G Falusi ◽  
P E Olumese ◽  
...  
Keyword(s):  
High Rate ◽  
Southwest Nigeria

A Study of Change in Agricultural and Forest Land in Gwalior City Using Satellite Imagery

2017 ◽  
Vol 9 (02) ◽  
pp. 109-112
Author(s):  
Padam Jee Omar ◽  
Nitesh Gupta ◽  
Ravi Prakash Tripathi ◽  
Shiwanshu Shekhar ◽  
Surender .
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Land Cover ◽  
Arid Region ◽  
Local Population ◽  
High Rate ◽  
Semiarid Region ◽  
Change Analysis ◽  
Semi Arid Region ◽  
Semi Arid

The relative evaluation of land use and land cover for various uses such as forest, agriculture and water bodies etc. is the important issue in the semiarid region. Application of Remote Sensing technology for Land Use and Land Cover (LULC) change analysis has been carried out in semi-arid region of Madhya Pradesh, central part of India and found that the use of remote sensing along with Survey of India toposheets could be used appropriately for LULC mapping. The semi-arid regions are characterized by erratic rainfall and high rate of vegetation dynamics. The increasing biotic pressure together with increasing human demands exerts pressure on the available land resources all over the region. Therefore, in order to have best possible use of land, it is not only necessary to have the information on the existing LULC, but also to monitor the dynamic land use resulting because of increasing demands aroused from the growing population. Continuous overexploitation of natural resources like land, water, and forest has caused serious threat to the local population of the semi-arid region. This causes problems like little scope for soil moisture storage, high rate of soil erosion, declining groundwater level and shortage of drinking water

scholarly journals Comparison of Rootability of Stem Cuttings from Seedlings of Aesculus sp. and Mature Aesculus × arnoldiana ‘Autumn Splendor’

1988 ◽  
Vol 6 (2) ◽  
pp. 69-71
Author(s):  
B.A. Bergmann ◽  
W.P. Hackett ◽  
H. Pellett
Keyword(s):  
Butyric Acid ◽  
Developmental Stages ◽  
Stem Cuttings ◽  
Mature Tree ◽  
Mature Trees ◽  
Old Growth ◽  
Rooting Of Cuttings ◽  
Root Suckers ◽  
Stem Segments

Rootability was evaluated for stem cuttings taken at varying positions and developmental stages from seedlings of Aesculus and from the mature trees of Aesculus × arnoldiana ‘Autumn Splendor’. Rooting was 100% for cuttings taken from 2-week-old seedlings and 0% for those obtained from the crown of the mature tree 2 months after commencement of spring growth flush. Intermediate rootability was found for cuttings taken from 1-month-old seedlings and from the 2 week-old growth of suckers at the base of the mature tree. Rooting of cuttings with intermediate rooting potential was increased by a quick dip treatment with 2500 ppm indole-3-butyric acid (IBA) or by using apical rather than basal stem segments. Commercially acceptable rooting was not achieved using cuttings from root suckers or the crown of Aesculus ‘Augumn Splendor’.

scholarly journals Epidemiology of Cardiovascular Diseases in Morocco: A Systematic Review

2021 ◽  
Vol 17 (2) ◽  
pp. 57-67
Author(s):  
Rida Elyamani ◽  
Abdelmajid Soulaymani ◽  
Hind Hami
Keyword(s):  
Risk Factors ◽  
Systematic Review ◽  
Cardiovascular Diseases ◽  
English Language ◽  
Local Population ◽  
Treatment Strategies ◽  
Epidemiological Studies ◽  
High Rate ◽  
Systematic Analysis ◽  
Moroccan Population

OBJECTIVE: To provide a systematic review of studies on cardiovascular diseases (CVD) and their risk factors in the Moroccan population. METHODS: A systematic analysis was performed based on PRISMA guidelines by retrieving data bases (Medline, Embase, and other) using technical keywords in addition to manual research on official websites. Published studies in the English or French language, conducted in Morocco or concerning the Moroccan population within the last two decades, were identified. RESULTS: This is the first systematic review of CVD in Morocco. Data from 159 studies were retrieved and analyzed. Most studies were written in the English language (75.89%) and published between 2010 and 2019 (85.47%). The mortality rate caused by CVD in Morocco has reached 38%, with ischemic heart disease and stroke as the main events causing death (31.0% and 22.5% respectively). The risk factors present in the population studied were headed by tobacco smoking (45- 50%), followed by physical inactivity (21.1%), elevated rate of hypertension (25.3%), and depression (5.47%). Impacted by a high rate of illiteracy and poverty and an unprepared health care system in Morocco, these numbers are expected to increase over the next decade. CONCLUSIONS: Based on these alarming incidences, investment in scientific research and epidemiological studies should be increased to determine the needs of the local population. The available evidence shows that the risk of cardiovascular disease and the associated mortality is very high in Morocco and will rise in the next years prospectively, which calls for urgent multi-sectorial approaches and treatment strategies.

Genetic diversity of Nephtys hombergii (Phyllodocida, Polychaeta) associated with environmental factors in a highly fluctuating ecosystem

2017 ◽  
Vol 98 (4) ◽  
pp. 777-789
Author(s):  
Katerina Vasileiadou ◽  
Christina Pavloudi ◽  
Federica Camisa ◽  
Irene Tsikopoulou ◽  
Nina Fragopoulou ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Environmental Factors ◽  
Population Distribution ◽  
Seasonal Pattern ◽  
Local Population ◽  
Management Strategies ◽  
Intraspecific Variability ◽  
Coi Gene ◽  
Dispersal Ability ◽  
Genetic Structuring

Genetic diversity and population distribution are influenced by environmental factors, yet information is scarce on the interrelations that define dispersal of populations. Transitional water ecosystems are hosting habitats with temporally and spatially variable conditions, which make them very useful in understanding the mechanisms affecting population establishment. For the study, seasonal samples were collected from four lagoons in the lagoonal complex of Amvrakikos Gulf (W Greece). The mitochondrial DNA (COI gene) was analysed from polychaetes of Nephtys hombergii, as it is considered an important component of these assemblages and shows great dispersal ability. The results of the genetic analysis showed intraspecific variability in all the lagoons, with genetic structuring tending to follow a seasonal pattern rather than a spatial one. The results of BIOENV analysis indicated correlation of the observed pattern with the water pH levels, the redox potential and the concentration of phosphate in the sediment. The complexity of the network suggested the enhancement of the local population with more recently established haplotypes. The findings of the study support the necessity of designing management strategies by taking into account genetic diversity and population demography approaches in addition to those based on species and habitats.

scholarly journals An assessment of the abundance and distribution of the Titicaca Flightless Grebe Rollandia microptera on Lake Titicaca and evaluation of its conservation status

2006 ◽  
Vol 16 (3) ◽  
pp. 237-251 ◽  
Author(s):  
ARI E. MARTINEZ ◽  
DAVID F. ARANIBAR ◽  
EDWIN R. GUTIERREZ
Keyword(s):  
Total Population ◽  
Population Distribution ◽  
Current Knowledge ◽  
Conservation Status ◽  
Local Population ◽  
Development Stage ◽  
Iucn Red List ◽  
Lake Titicaca ◽  
Large Spatial Scale ◽  
Distribution Ranges

Censuses were conducted from 15 June to 6 July and from 15 to 24 October 2003 throughout Lake Titicaca to determine the current distribution and abundance of the Titicaca Flightless Grebe Rollandia microptera. We surveyed 22 of an estimated 25 local population distribution ranges. We defined these as shallow offshore feeding areas in combination with coastal beds of tule-rushes (Schoenoplectus tatora). At this large spatial scale we found variously sized populations of grebes in all 22 of the areas surveyed and a negative correlation between the total area of tule-bed within each area and grebe density. Absolute counts of grebes pooled across all sites produced a total of 2,582 individuals on Lake Titicaca. Given that some sites were either partially surveyed or not surveyed at all we feel that this is an underestimate of the total lake population. Limitations in methodologies used precluded the classification to development stage of approximately 43% of the individuals counted. Among the remaining 57% of the individuals counted we identified 732 mature adults within the total population of Lake Titicaca. When combined with information from other sources and current knowledge of habitat fragmentation our results support the classification of the species in the IUCN Red List as Endangered under criterion C2a. Of 20 local fisherman interviewed on the Bolivian side of Lake Titicaca, 90% confirmed that individuals of Titicaca Flightless Grebe incidentally drown in their fishing nets although responses varied from weekly to monthly estimates of by-catch. Although this study provides the first estimate of the total population of Titicaca Flightless Grebes on Lake Titicaca, a standardized monitoring programme will be required in order (1) to provide a baseline for the interpretation of future population trends in the context of impacts generated by human activities and (2) to aid in future management decisions for the long-term conservation of the species.

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