scholarly journals Floristic, Structure, and Regeneration of Woody Species in Bola Wanche Forest of Humbo Carbon Project, Wolaita, Ethiopia

2021 ◽  
Author(s):  
Markos Kuma ◽  
Simon Shibru
Keyword(s):  
Population Distribution ◽  
Woody Species ◽  
Distribution Patterns ◽  
Negative Effects ◽  
Successional Stage ◽  
Regeneration Status ◽  
Significant Difference ◽  
Carbon Project ◽  
Syzygium Guineense ◽  
Regeneration Phase

Abstract BackgroundThe forest resources of the Humbo Carbon Project have ecological and environmental problems such as soil degradation, soil erosion and alteration of natural resources are some of the negative effects resulting from the destruction of forests Our present study was carried out to investigate regeneration status and dynamics of populations of woody species in Bola Wanche forest of Humbo Carbon Project Wolaita zone, Ethiopia. Methods and ResultsThirty-two (20m x 20m) plots were laid at an interval of 100m to collect vegetation data. In each plot, five 1m 2 quadrats were laid to assess regeneration status. DBH (Diameter at Breast Height) of each woody species with DBH ≥2.5cm was measured. Altitude, aspect and slope of each plot were recorded. Among 61 woody species representing 56 genera and 35 families, Syzygium guineense and Dodonaea angustifolia were the most dominant. There was significant difference in the dominance (p < 0.0001) of species between plots. Inverted J-shape and bell-shape population distribution patterns were recognized. The regeneration phase was dominated by D. angustifolia. Only 36% of the species in matured vegetation was represented in seedling phase. Environmental factors considered in this study were not influenced abundance of species and individuals between plots. But when dominant species evaluated separately, altitude had significant influence on abundance of S. guineense and Combretum molle while aspect on C. molle and Terminalia schimperiana. But no factor had influenced abundance of D. angustifolia. ConclusionThe study concluded the abundance and dominance of few families and species, prevalence of small size populations and fair regeneration of forest. This may indicate that the forest is in its early secondary successional stage and need high intention of conservation and management.

scholarly journals Effect of exclosure on dryland woody species restoration in northeastern Amhara, Ethiopia

2020 ◽  
Author(s):  
Mubarek Eshetie ◽  
Tsegaye Gobezie ◽  
Seid Muhie Dawd
Keyword(s):  
Species Diversity ◽  
Water Conservation ◽  
Diversity Index ◽  
Woody Species ◽  
Secondary Forests ◽  
Land Uses ◽  
Vegetation Diversity ◽  
Regeneration Status ◽  
Significant Difference ◽  
Woody Species Diversity

AbstractIn Ethiopia, among many restoration efforts to reverse deforestation and land degradation, area exclosure is one of the most common practices to restore secondary forests with assisted natural regeneration. The present study in the Sekota district, northeastern Amhara region, Ethiopia evaluated the influence of areas exclosures on woody species diversity, population structure and regeneration status. A total of 36 and 27 quadrats, each 20 m × 20 m, were used to collect data in exclosures and non-exclosures, respectively. Within quadrats, four 5 m × 5 m and 2 m × 2 m quadrats at the corners were used to sample saplings and seedlings, respectively. In exclosures, 35 woody species representing 21 families and 29 genera were recorded; 19 woody species representing 13 families and 13 genera were recorded in the non-exclosure. Acacia etbaica was the most dominant species in the two land-uses. The Shannon diversity index was 1.77 ± 0.46 in exclosures and 1.39 ± 0.46 in non-exclosures. Shannon and Simpson diversity indices showed a significant difference between the two land-uses (p < 0.01). The regeneration status of all wood species in exclosures was good, only fair in non-exclosures. Area exclosures have thus played a great role in the restoration of degraded lands by improving vegetation diversity and regeneration status. The least dominant woody species should be maintained through active restoration. Continuous follow-up, maintenance of soil water conservation structure to improve soil fertility will further help enhance the woody species diversity and abundance.

Spatial Distribution Patterns of Seedling Emergence of Stipagrostis pennata in Gurbantonggut Desert

2012 ◽  
Vol 524-527 ◽  
pp. 2101-2108
Author(s):  
Xia Zhang ◽  
Wen Ling Wang ◽  
Huan Ge ◽  
Li Hong Long ◽  
Shao Ming Wang
Keyword(s):  
Spatial Distribution ◽  
Population Distribution ◽  
Seedling Emergence ◽  
Distribution Patterns ◽  
Leeward Side ◽  
Seedling Density ◽  
Spatial Distribution Patterns ◽  
Emergence Patterns ◽  
Distribution Rule ◽  
Significant Difference

The aim of this study was to investigate the spatial distribution patterns and the amounts of seedling density of S. pennata in different sample dunes in Gurbantonggut Desert. Results indicate that spatial patterns of seedling emergence of S. pennata were of general similar with the distribution patterns of its associated standing vegetations, and was greatly associated with spatial distribution of the threshold wind (≥6m.s-1) frequency from the various directions. There existed a significant difference in its seedling emergence patterns among the different parts of the dunes and the different directions around its parent vegetation beds. The highest seedling density was found to be on the top parts of sampling dunes and at the underlayer of standing vegetation beds of S. pennata, and higher seedling densities usually took place in the leeward side of the vegetation beds. These results had revealed the ecological characteristics of the population distribution rule and the recruitments mechanism of S. pennata.

scholarly journals Diversity of Woody Plant Species of Gamuwa and Oda Forests of Humbo Carbon Project, Wolaita, Ethiopia: For Conservation and Management of Forests

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Markos Kuma
Keyword(s):  
Land Cover ◽  
A Priori ◽  
Woody Species ◽  
Diversity Indices ◽  
Slope Aspect ◽  
Managed Forests ◽  
Significant Difference ◽  
Community Types ◽  
Carbon Project ◽  
Conservation And Management

This study was conducted in the Community Managed Forests of Gamuwa and Oda of Carbon Project of Humbo, Wolaita, Ethiopia. The objective of the study was to explore diversity of woody species for conservation and management of the forests. A total of 64 (20 m × 20 m) quadrats were sampled to gather data of species cover abundance, altitude, aspect, and slope. Vegetation clustering was performed from cover abundance using XLSTAT version 2015.2.03 software package. Similarity coefficient was computed using number of species that existed in each community and had been common to them. Diversity indices were computed from number of individuals of each species using Multivariate Variate Statistical Package (MVSP) version 3.1. The General Linear Model (GLM) analysis confirmed the presence of significant difference (p value = 0.001) of species distribution, altitude, and slope among the quadrates of the three community types. However, except aspect in community 3 (p value = 0.005) slope, aspect, land cover, and altitude insignificantly affected the distribution of species in communities. Therefore, a priori management and conservation should be given for families with only one species, community with high dominance (D′), and the area with less land cover.

scholarly journals Floristic Composition, Vegetation Structure, and Regeneration Status of Woody Plant Species of Oda Forest of Humbo Carbon Project, Wolaita, Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Markos Kuma ◽  
Simon Shibru
Keyword(s):  
Vegetation Structure ◽  
Woody Plant ◽  
Basal Area ◽  
Floristic Composition ◽  
Woody Species ◽  
Regeneration Status ◽  
Tree Data ◽  
Carbon Project ◽  
Dodonaea Angustifolia ◽  
Conservation And Management

Our current study was conducted in Oda forest to explore floristic composition, vegetation structure, and regeneration of woody species in a newly established Humbo Carbon Project. In the project, the above information for sufficient conservation and management of the forest is not well documented. Data were collected in October and December 2014. Thirty-two quadrats (20 m × 20 m) lying 100 m far apart were used for shrub and tree data. In each major plot, subplots (1 m2) were established at the center and corner for seedlings and saplings data. Altitude, slope, and aspect were measured using GPS and clinometers. DBH, basal area, and IVI were used for vegetation structure. Among 62 species confined in 32 families and 54 genera, Dodonaea angustifolia and Combretum molle were the densest and the most dominant and frequent species with higher IVI. Altitude and slope had significant effect (p<0.0001) on basal area and dominance. Bell and inverted J shaped patterns of selected woody species were identified. The seedling, sapling, and matured tree had 2.3%, 23.7%, and 74% density ha−1 of individuals, respectively. Generally, the study confirmed that very few species had dominance and abundance, influence of altitude and slope on species distribution, and fair regeneration of the forest.

scholarly journals Computing infection distributions and longitudinal evolution patterns in lung CT images

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Dongdong Gu ◽  
Liyun Chen ◽  
Fei Shan ◽  
Liming Xia ◽  
Jun Liu ◽  
...  
Keyword(s):  
Time Course ◽  
Lower Lobe ◽  
Ground Truth ◽  
Distribution Patterns ◽  
Lung Infection ◽  
Ct Images ◽  
Community Acquired Pneumonia ◽  
Disease Course ◽  
Distribution Maps ◽  
Significant Difference

Abstract Background Spatial and temporal lung infection distributions of coronavirus disease 2019 (COVID-19) and their changes could reveal important patterns to better understand the disease and its time course. This paper presents a pipeline to analyze statistically these patterns by automatically segmenting the infection regions and registering them onto a common template. Methods A VB-Net is designed to automatically segment infection regions in CT images. After training and validating the model, we segmented all the CT images in the study. The segmentation results are then warped onto a pre-defined template CT image using deformable registration based on lung fields. Then, the spatial distributions of infection regions and those during the course of the disease are calculated at the voxel level. Visualization and quantitative comparison can be performed between different groups. We compared the distribution maps between COVID-19 and community acquired pneumonia (CAP), between severe and critical COVID-19, and across the time course of the disease. Results For the performance of infection segmentation, comparing the segmentation results with manually annotated ground-truth, the average Dice is 91.6% ± 10.0%, which is close to the inter-rater difference between two radiologists (the Dice is 96.1% ± 3.5%). The distribution map of infection regions shows that high probability regions are in the peripheral subpleural (up to 35.1% in probability). COVID-19 GGO lesions are more widely spread than consolidations, and the latter are located more peripherally. Onset images of severe COVID-19 (inpatients) show similar lesion distributions but with smaller areas of significant difference in the right lower lobe compared to critical COVID-19 (intensive care unit patients). About the disease course, critical COVID-19 patients showed four subsequent patterns (progression, absorption, enlargement, and further absorption) in our collected dataset, with remarkable concurrent HU patterns for GGO and consolidations. Conclusions By segmenting the infection regions with a VB-Net and registering all the CT images and the segmentation results onto a template, spatial distribution patterns of infections can be computed automatically. The algorithm provides an effective tool to visualize and quantify the spatial patterns of lung infection diseases and their changes during the disease course. Our results demonstrate different patterns between COVID-19 and CAP, between severe and critical COVID-19, as well as four subsequent disease course patterns of the severe COVID-19 patients studied, with remarkable concurrent HU patterns for GGO and consolidations.

Spatial features of a penitentiary unit in the context of stress experienced by Prison Service staff

2021 ◽  
Vol III (III) ◽  
pp. 97-114
Author(s):  
Sławomir Grzesiak ◽  
Jarosław Rychlik ◽  
Agnieszka Nowogrodzka
Keyword(s):  
Physical Space ◽  
Research Problem ◽  
Conservation Of Resources ◽  
Negative Effects ◽  
Spatial Features ◽  
Functional Aspects ◽  
Service Staff ◽  
Significant Difference ◽  
Stress Experience ◽  
Prison Community

Prison as the place of work of the Prison Service staff is a specific workplace due to both the nature of the prison community as well as the infrastructural and architectural solutions deployed to protect prison officers. Considering the spatial features of a penitentiary unit and their role in the due performance of Prison Service tasks, it seems quite relevant to seek an answer to the question: How does the physical space of a prison contribute to the stress experienced by prison officers? The issue in question is rooted in M. Mendel’s concept of pedagogy of place, symbolic interactionism and S. Hobfoll’s conservation of resources theory. Inquiry into a research problem of this kind seems reasonable taking into account the infrastructural and spatial aspects of the surroundings that can be potential stress drivers. In April 2021, a group of 58 prison officers were surveyed based on the Stress Perception Questionnaire and the author’s questionnaire. Relationships between the variables have been established through the use of correlation, significant difference test and variance analysis. The results revealed that the essential spatial characteristics of a penitentiary unit associated with the perception of stress by Prison Service staff are those features that relate to the penitentiary unit’s functional aspects covering the specific technical and protective safeguards. These results formed a premise for designating higher-risk staff groups, with regard to which preventive programmes aimed at counteracting the negative effects of stress experience should be considered

The effects of psychological counseling and acupressure based on couple therapy procedure for alleviation of vomiting and nausea in pregnant women in Iran country

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sahar Saadatnia ◽  
Azita Tiznobaik ◽  
Amir Saber
Keyword(s):  
Pregnant Women ◽  
Couple Therapy ◽  
Psychological Intervention ◽  
Nausea And Vomiting ◽  
Control Group ◽  
Negative Effects ◽  
Psychological Counseling ◽  
Significant Difference ◽  
Group 2 ◽  
Short Time

Abstract Objectives Nausea and vomiting have psychological negative effects on some pregnant women during gestation. Different strategies have been used for the treatment of nausea and vomiting during pregnancy, such as acupressure and psychological interventions. This study was conducted to evaluate the effects of psychological counseling and acupressure based on couple therapy procedures on vomiting and nausea in pregnant women in Iran. Methods Two hundred and eight women were divided into four groups (n=52): 1) they did not any intervention (control group), 2) they received the psychological intervention, 3) they received acupressure intervention, and 4) they received a combination of psychological + acupressure interventions. To investigate the effects of interventions on nausea and vomiting, the Rhodes index of nausea, vomiting and retching were used. The counseling period has lasted for 4 weeks. The pressure intervention on the site was conducted in clockwise form for 1 min and anticlockwise form for another 1 min. Results Groups did not have a significant difference for abortion and income (p>0.05). The effects of counseling, and acupressure interventions on severity and period of vomiting and nausea were not significant (p>0.05), but the intervention based on counseling and acupressure decreased severity of vomiting and nausea (p<0.05). Conclusions The intervention based on counseling and acupressure could not reduce nausea and vomiting during the gestation, but the intervention based on a combination of both decreased nausea and vomiting. It can be suggested to apply an intervention based on a combination of counseling and acupressure in short-time period for decreasing nausea and vomiting in women during pregnancy.

scholarly journals SOIL SEED BANK IN SEASONAL SEMIDECIDUOUS FOREST AND ABANDONED PASTURE

2016 ◽  
Vol 40 (6) ◽  
pp. 991-1001 ◽  
Author(s):  
Sustanis Horn Kunz ◽  
Sebastião Venâncio Martins
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Life Forms ◽  
Successional Stage ◽  
Semideciduous Forest ◽  
Regeneration Stage ◽  
Significant Difference ◽  
Successional Stages ◽  
Pasture Area ◽  
Seasonal Semideciduous Forest

ABSTRACT The objective of this study was to characterize the seed bank in the soil of different successional stages of Seasonal Semideciduous Forest and abandoned pasture in order to understand the natural regeneration potential of these areas. At each successional stage, 30 samples of soil were collected in the rainy and dry seasons to evaluate the qualitative heterogeneity of the forest, at the regeneration stage (FEA) forest, intermediate regeneration stage forest (ISF) and pasture (PAS). The species were classified according to the life form, successional group and dispersion syndrome. The number of individuals germinated was significantly higher (p < 0.001) in the ISF and in the rainy season (15,949 individuals). Richness was higher in the pasture area (79 species), with a significant difference only between the environments. Most species are herbaceous (49.5%), pioneers (76.5%) and zoocory was the main dispersion syndrome (49% of species). The results show that seed bank in the fragment of the regeneration advanced stage forest presents the highest resilience potential, since it is formed by different life forms and, mainly, by early and late secondary species.

scholarly journals Shadow economy and public debt sustainability in Turkey

2007 ◽  
Vol 52 (173) ◽  
pp. 85-104 ◽  
Author(s):  
Yereli Burçin ◽  
Erdem Seçilmiş ◽  
Alparslan Başaran
Keyword(s):  
Economic System ◽  
Legal System ◽  
Public Debt ◽  
Shadow Economy ◽  
Negative Effects ◽  
The Core ◽  
Significant Difference ◽  
Sustainability Of Public Debt ◽  
The Government ◽  
The Relationship

The aim of this study is to examine the relationship between the shadow economy and public debt in Turkey. We elaborate on the questions regarding the negative effects of shadow economy on the sustainability of public debt observing the estimates about the size of shadow economy in Turkey. In the light of some scholars? estimates, we re-evaluate the macroeconomic situation of Turkey. At the core of the study, we discuss how the government borrowing policies would differ if the shadow economy was included into the legal system. In order to examine the effects of shadow economy on sustainability, we use various sustainability indicators. There is a significant difference observed between the calculations which take into account the volume of shadow economy as a share of economic system and those that exclude shadow economy as an exogenous variable. .

scholarly journals Gender Differences And Psychological Impacts In Higher Education During Covid-19 Pandemic

2021 ◽  
Vol 7 (2) ◽  
pp. 290
Author(s):  
Iswadi Iswadi ◽  
Apriyanto Apriyanto
Keyword(s):  
Higher Education ◽  
Online Learning ◽  
Negative Effects ◽  
Male And Female ◽  
Postgraduate Students ◽  
Learning Platform ◽  
Significant Difference ◽  
E Learning ◽  
Efl Students ◽  
The Difference

<p><em>E-learning during covid-19 pandemic gives positive and negative effects on students’ psychology. One of the effects of E-Learning is students whose negative and positive perception towards the process of E-Learning. The objectives of the study are to know (1)  The difference perception between male and female EFL post-graduate students of the use of online learning platforms? (2). Impacts psychologically of E-learning during Covid-19 to female and male EFL students in higher education. The method of the study is mixed research with the explanatory sequential design. The participants were 31 EFL postgraduate students in PGRI Indraprasta University. The data collection technique of the study was questionnaires with a Likert scale and an open interview. The data analysis technique of the study is an independent sample t-test with SPSS 22.0 version and collection, reduction, display, and conclusion. The results of the study are: (1) There is no significant difference perception between male and female EFL postgraduate students of the use of online learning platform because the significance value (0.695) which is bigger than 0.05. (2)  E-learning during the Covid-19 pandemic did not  give anxiety, fear, fatigue, and saturation to female and male EFL students in higher education. Implication of this research is University must develop LMS (Learning Management System) for teaching EFL students</em></p>

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