Floristic study and assessment of the environmental factors governing the distribution of riparian plants in the Zat sub-Basin: Tensift Watershed, Morocco

2020 ◽  
Vol 45 (2) ◽  
pp. 7900-7915
Author(s):  
Mostakim Lahcen ◽  
Fetnassi Nidal ◽  
Ghamizi Mohamed
Keyword(s):  
Environmental Factors ◽  
Pearson Correlation ◽  
Ecological Status ◽  
Environmental Parameters ◽  
Quality Parameters ◽  
Phosphorus Concentration ◽  
Factors Affecting ◽  
Riparian Plants ◽  
Emergent Plants ◽  
Significant Difference

Measuring the phytodiversity and determining environmental factors affecting the abundance and distribution of riparian plants of Zat sub-basin in Morocco were carried out in this study. A hypothesis was tested whether there is any statistically significant difference in environmental parameters and plants communities among the Zat River and its tributaries. For this purpose, water quality parameters such as temperature, pH, salinity, electrical conductivity, Dissolved Oxygen, nitrate and phosphorus concentration, and riparian plants diversity were estimated at 17 stations along the Zat River and its tributaries during the periods (2018 and 2019). The Canonical Correspondence Analysis (CCA) and Pearson correlation were preformed to assess the relationship between environmental parameters, and the distribution and abundance of riparian plants inventoried. The presence of 113 species was recorded, distributed between 43 families and 97 genera, 9 of which were floating-leaved, 24 submerged, and 80 emergent plants. The rare and threatened species inventoried were represented by 7 taxa, whereas 6 species are reported as endemic. Raunkiaer classification showed a dominance of therophytes (38.39%) over the other groups. According to CCA, the abiotic parameters (DO, elevation, salinity and nitrate concentration) were statistically significant parameters governing the distribution and abundance of the riparian plants inventoried. The results obtained reveal the state of the riparian vegetation in the Zat subBasin, therefore we can consider them as a reliable component for the assessment of the ecological status of the aquatic environment.

scholarly journals Spatial pattern of riparian plants along stream order among mountain rivers in China

2018 ◽  
Vol 9 (2) ◽  
pp. 322-330
Author(s):  
Rong Sun ◽  
Xiaojie Luo ◽  
Xiangyu Meng ◽  
Yan Wang
Keyword(s):  
Species Richness ◽  
Environmental Factors ◽  
Tree Species ◽  
Riparian Vegetation ◽  
Stream Order ◽  
River Continuum ◽  
Riparian Plants ◽  
Tree Species Richness ◽  
Riparian Species ◽  
Significant Difference

Abstract The streams in a watershed form a hierarchical network system. From the perspective of the river continuum, this classification system is the result of gradual increase in traffic. This study analyzed the riparian species richness, diversity and environmental factors along a six-order hierarchical mountain river in the Donghe watershed, China. A total of 34 sampling sites were sampled to study the spatial distribution of riparian plants among different stream orders. The results showed: Environmental factors among stream orders had significant differences. Among stream order, species richness showed remarkable differences. The species richness rose firstly and dropped afterwards except for tree species richness; tree species richness decreased while stream order increased. The same is true for shrub quadrat species richness. Shannon-Wiener diversity, Simpson dominance and Pielou uniformity showed significant difference among stream orders; Shannon-Wiener diversity rose firstly then dropped afterwards. For integrated environmental factors and community characteristics, we found the changes of stream orders had a significant impact on riparian habitats and riparian vegetation. Further analysis showed that riparian vegetation experienced different types and degrees of disturbance in different stream orders. This meant that a hierarchical management strategy should be applied to riparian vegetation management.

THE INFLUENCE OF ENVIRONMENTAL FACTORS ON THE CROP AND QUALITY OF FIBER FLAX

2020 ◽  
Vol 5 (86) ◽  
pp. 3-10
Author(s):  
V.G. Chernikov ◽  
◽  
R.A. Rostovtsev ◽  
N.A. Kudryavtsev ◽  
I.V. Uschapovsky ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Raw Materials ◽  
Great Influence ◽  
Quality Parameters ◽  
Anthropogenic Factors ◽  
Soil Conditions ◽  
Factors Affecting ◽  
Fiber Flax ◽  
Yield And Quality

The formation of fiber flax yield and quality parameters depends on many soil-climatic, breedinggenetic, as well as anthropogenic factors. The quality of flax fiber is a combination of a number of features and properties that depend on the varietal characteristics of plants, the conditions of their cultivation, technologies for harvesting and straw retting, as well as on the processing modes of raw materials. During plant vegetation (90-130 days) many factors such as soil conditions (pH 4.8-5.5, humus 1.8-2.5%, P2O5 and K2O – 150-200 and 100-200 mg/kg, respectively) and the area of plant nutrition (15-30 million seeds/ha), temperature regime (the sum of active temperatures 1000-1800ºC), water supplying (400-430 units of water mass to create 1 unit of dry matter) and insolation (the arrival of FAR during the growing season 20-25 kcal / cm²), contamination of weeds (more than 60 annual and perennial species) and pests (more than 200 types of fungal, bacterial and viral diseases), features of phytosanitary measures (more than 50 chemicals) and agrotechnologic manners (Federal Register of technologies for the production of crop products) have a great influence on the quality of flax raw materials and can be a limit factor. Environmentally hazardous pollution of air, water and soil - the main components for the production of fiber flax – strongly affects the yield and quality of flax products. The development of waste-free environmentally friendly technologies for the cultivation, harvesting and processing of flax is an urgent task of scientific support of the industry. The main environmental factors affecting the yield and quality of fiber flax are discussed in the article.

scholarly journals Aquatic Oligochaeta (Annelida) of Dam Lakes Çatören and Kunduzlar (Turkey) 

Zoosymposia ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 70-76
Author(s):  
NAIME ARSLAN ◽  
DENIZ KARA ◽  
CANSEV AKKAN KÖKÇÜ ◽  
MELIH RÜZGAR
Keyword(s):  
Pearson Correlation ◽  
Environmental Parameters ◽  
Wiener Index ◽  
Benthic Invertebrate ◽  
Quality Parameters ◽  
Correlation Index ◽  
Invertebrate Fauna ◽  
Chironomidae Larvae ◽  
Central Turkey ◽  
Point Source Discharges

Çatören and Kunduzlar Dam Lakes, located on Seydi River, represent the main irrigation water resources of the Seyitgazi District (Eskişehir Province), in west-central Turkey. The river and the reservoirs are both under the threat of pollution primarily originating from several domestic point source discharges and land-based runoff. The numerical and proportional distributions of oligochaetes in Çatören and Kunduzlar Dam Lakes were surveyed seasonally in 2010 and 2011 at two stations on each lake. According to the results of this study, the benthic invertebrate fauna of Çatören Dam Lake consisted of Oligochaeta (40.2 %), Chironomidae larvae (32.2 %) and the varia (27.6 %); the benthic invertebrate fauna of Kunduzlar Dam Lake consisted of Oligochaeta (56.7 %), Chironomidae larvae (18.2 %) and the varia (25.1%). By evaluating the data via a Shannon-Wiener index it was found that the Çatören Dam Lake had an index of 2.32; while Kunduzlar Dam Lake had an index of 3.27. Several physicochemical water quality parameters were also analyzed during this study. The relationships between the dynamics of organisms and environmental parameters were supported by Pearson correlation index. It was determined that Çatören and Kunduzlar Dam Lakes waters were polluted and slightly polluted, respectively. The dominance and abundance of oligochaete species and low species richness showed that similar studies should be carried out periodically in Çatören and Kunduzlar Dam Lakes for the future monitoring of the dam lakes.

scholarly journals The effect of environmental factors on the abundance of cefotaxime-resistant Escherichia coli in Sunter River

2021 ◽  
Vol 909 (1) ◽  
pp. 012006
Author(s):  
Efadeswarni ◽  
F Y Amandita ◽  
N Puspandari ◽  
N Aini
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Environmental Factors ◽  
Pearson Correlation ◽  
Antibiotic Sensitivity ◽  
Environmental Parameters ◽  
Extended Spectrum Beta Lactamase ◽  
E Coli ◽  
Antibiotic Sensitivity Test

Abstract The water quality of the Sunter River in Jakarta was classified as heavily polluted due to activities around the river, both domestic and non-domestic. As one of the environmental parameters for water quality, the presence of Escherichia coli (E. coli) is normally found any natural environment, and under certain conditions it can become resistant to antimicrobials due to genetic mutations. The mutated E. coli produces Extended Spectrum Beta-Lactamase (ESBL) enzymes and has a higher survival ability in antibiotic-contaminated river water, thus potentially endangering public health. This study was aimed to evaluate the effect of environmental factors on the abundance of ESBL producing E. coli and their resistance to antibiotic cefotaxime. Sampling was conducted in six locations representing the upstreams and the downstreams of Sunter River, following the Global Surveillance guidelines. E. coli strains were isolated using Tryptone Bile X-glucuronide (TBX) agar medium (with and without the addition of cefotaxime 4μg/ml) and the antibiotic sensitivity test of ESBL E. coli was conducted by performing a double-disk test. The results showed that the highest average abundance of ESBL E. coli was found in the sample taken from Sindang Station (904.24 x 104 colony per unit (CFU) / 100 mL) and the lowest was from Sunter Station (1,58 x 104 CFU / 100 mL). The results of the Bivariate Pearson correlation analysis showed that temperature, pH, and salinity were negatively correlated with the abundance of ESBL-producing E. coli bacteria.

scholarly journals Using the Backman Model in Determining the Dimensions of Self-Care and Its Factors Affecting the Elderly in Tehran City, Iran

2020 ◽  
Vol 26 (4) ◽  
pp. 382-397
Author(s):  
Leili Salehi ◽  
◽  
Leila Keikavoosi-Arani ◽  
Keyword(s):  
Social Support ◽  
Life Satisfaction ◽  
Pearson Correlation ◽  
Data Gathering ◽  
Self Care ◽  
The Elderly ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Self Confidence ◽  
Significant Difference

Aims Self-care helps older people manage their own health and stay independent by delaying disability. This study aimed to apply the Backman Model in determining the dimensions of self-care and the factors affecting it in the elderly in Tehran. Methods & Materials: This cross-sectional study was performed on 400 elderly members ofnursing homes by systematic random sampling. Data gathering tool included demographic characteristics and self-care behaviors, self-care orientation, life satisfaction assessment, self-confidence, social support, and functional capability. The Chi-square and Pearson correlationand regression analysis were used with a significance coefficient of 0.05. The data were analyzed in SPSS v. 19. Findings: The total mean ages of elderly were 69.11±7.51, 42.5% male. There was significant difference between the types of self-care and gender only in the dimensions of work habits (P<0.001) and medical treatment (P<0.001). Pearson correlation indicated there was a direct and positive relationship between self-care type and self-care orientation (r=0.662, P=0.01). The relationship between self-care type and social support was negative (r=0.075, P=0.01). Conclusion: Factors such as life satisfaction, functional capacity, social support and self-confidence are associated with self-care in the elderly. It is suggested that health system policymakers formulate support programs for the elderly in various forms, such as the elderly access to transportation program, facilities, tax exemptions, etc.

scholarly journals A household survey to assess prevalence of malaria and risk factors under urban field practice area, Dakshin Kannada

2018 ◽  
Vol 6 (1) ◽  
pp. 223
Author(s):  
Leena Salunkhe ◽  
Animesh Gupta ◽  
Shahul Hameed
Keyword(s):  
Risk Factors ◽  
Environmental Factors ◽  
Environmental Parameters ◽  
Household Survey ◽  
Malaria Prevalence ◽  
Health Seeking ◽  
Health Seeking Behavior ◽  
Significant Difference ◽  
Seeking Behavior ◽  
Prevention Methods

Background: Socio-demographic and environmental factors are associated with the malaria prevalence. Hence assessment of these factors would potentially help in identification of the possible risk factors among households with their health seeking behavior and would help to adopt the most suitable and appropriate malaria control strategies.Methods: A baseline household survey was carried out in the study site Lingappayakadu, Mulki, Manglore involving all study population (n=4954) from July to September 2017. Total 1043 households were interviewed with predesigned semi- structured questionnaire with informed written consent. Blood samples were collected from fever cases and results were confirmed for malaria within 24 hours. Anti-malarial drugs including the Primiaquine were given to all the positive cases. Data regarding socio-demographic characteristics and health seeking behavior were also collected from study population.Results: The prevalence of malaria in the study was 1.41% and slide positivity was 51.09%. The presence of malaria cases was statistically significant with number of members present in the family (p=0.00001, X2=199.37), age group (p=0.0168, X2=8.17) type of working status (p=0.0293, X2=7.06). Environmental factors like type of housing (p=0.3366, OR=1.3854), peri-domestic sanitation (p=0.1646, OR=0.554), Mosquito breeding (p=0.4504, OR=0.6757), indoor mosquitoes (p=1.000, OR=0.6173) and mosquito bite prevention methods were (p=0.1910, OR=1.7316) not showing any significant difference. Out of 137 fever cases, 70 cases were diagnosed with malaria amongst which 94.3% cases completed anti-malaria drug treatment.Conclusions: A survey provides data regarding socio-demographic, environmental and health seeking behavior of population. The study did not show any statistically significant association of malaria with many environmental parameters. Health seeking behavior could be analyzed and improved with frequent surveillance methods.

scholarly journals Environmental Factors Contribute to the Transmissibility of COVID-19: Evidence from an Improved SEIR Model

2021 ◽  
Author(s):  
Jie Li ◽  
Kun Jia ◽  
Wenwu Zhao ◽  
Bo Yuan ◽  
Yanxu Liu
Keyword(s):  
Environmental Factors ◽  
Pearson Correlation ◽  
Time Lag ◽  
Virus Transmission ◽  
Ecological Factors ◽  
Population Mobility ◽  
Seir Model ◽  
Factors Affecting ◽  
Distributed Lag ◽  
The Impact

Abstract COVID-19 is ravaging Brazil, and its spread shows spatial heterogeneity. Changes in the environment have been implicated as potential factors involved in COVID-19 transmission. However, considerable research efforts have not elucidated the risk of environmental factors on COVID-19 transmission from the perspective of infectious disease dynamics. The aim of this study is to model the influence of the environment on COVID-19 transmission and to analyze how the socio-ecological factors affecting the probability of virus transmission in 10 states dramatically shifted during the early stages of the epidemic in Brazil. First, this study used a Pearson correlation to analyze the interconnection between COVID-19 morbidity and socio-ecological factors, and identified factors with significant correlations as the dominant factors affecting COVID-19 transmission. Then, the time-lag effect of dominant factors on the morbidity of COVID-19 was investigated by constructing a distributed lag nonlinear model, and the results were considered to be an improvement over the SEIR model. Lastly, a machine learning method was introduced to explore the nonlinear relationship between the environmental propagation probability and socio-ecological factors. By analyzing the impact of environmental factors on virus transmission, it can be found that population mobility directly caused by human activities had a greater impact on virus transmission than temperature and humidity. The heterogeneity of meteorological factors can be accounted for by the diverse climate patterns in Brazil. The improved SEIR model was adopted to explore the interconnection of COVID-19 transmission and the environment, which revealed a new strategy to probe the causal links between them.

scholarly journals Species diversity of seagrass-associated bivalves as an ecological parameter to support seagrass conservation along with the Coastal Waters of South Lombok, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Abdul Syukur ◽  
LALU ZULKIFLI ◽  
AGIL AL IDRUS ◽  
BAIQ NUNUNG HIDAYATI
Keyword(s):  
Species Diversity ◽  
Coastal Waters ◽  
Pearson Correlation ◽  
Environmental Parameters ◽  
Research Approach ◽  
Ecological Indices ◽  
Ecological Parameter ◽  
Significant Difference ◽  
Index Value ◽  
The Relationship

Abstract. Syukur A, Zulkifli L, Idrus AA, Hidayati BN. 2021. Species diversity of seagrass-associated bivalves as an ecological parameter to support seagrass conservation along with the Coastal Waters of South Lombok, Indonesia. Biodiversitas 22: 5133-5144. Seagrass has a role in supporting the survival of marine life, such as bivalves. This study aimed to investigate the relationship between bivalve species diversity as a parameter for seagrass conservation. The research approach was through observation and data collection for seagrass and bivalves using quadrant and transect methods—Analysis of the data through descriptive statistical analysis, ANOVA, and Pearson correlation. The number of seagrass species in the six research sites was nine. Furthermore, the species composition of bivalves consisted of 11 families comprising 47 species. The ANOVA results showed a significant difference based on the F-count value, higher than the F-table value of the three ecological indices (H', E, and Ki). Two ecological indices, namely H' and Ki, have r values ??less than 0.5 for all environmental parameters (temperature, brightness, pH, salinity, DO, phosphate, and nitrate) and show no significant correlation. However, the E index value has an r value greater than 0.5 for nitrate, salinity DO, and phosphate. The highest significance value of the four environmental variables is for nitrate, with an r = 0.875. The conclusion is that the richness and abundance of seagrass-associated bivalves in the study area are predetermined by the characteristics of the seagrass environment, especially the substrate. Secondly, seagrasses could create a suitable substrate for bivalves to survive. Therefore, the indicator of the presence of associated Bivalvia species can be a parameter for local scale seagrass conservation at the study site.

Environmental Assessment in Manuscripts Library and Storages of Semi-Active Record at Sultanate of Oman

2013 ◽  
Vol 9 (3) ◽  
pp. 65-81
Author(s):  
Nahed Salem ◽  
Sabah Abdul-Wahab ◽  
Sappurd Ali
Keyword(s):  
Environmental Factors ◽  
Environmental Parameters ◽  
International Standards ◽  
Indoor Environments ◽  
Sultanate Of Oman ◽  
Document Collections ◽  
Factors Affecting ◽  
Archival Collection ◽  
Active Record

Indoor environmental factors have been associated with deterioration of vital library and archival assets. The assessment of environmental factors affecting the library and document collections due to their inappropriate levels was the main objective of current study. In order to fulfill this objective the measurements of indoor environmental parameters were taken in manuscripts library and documents storage buildings of various Ministries of Sultanate of Oman. The measured values of these parameters were compared with the permitted values defined in various international standards/guidelines. The results of the study showed that the observed levels of environmental factors inside these buildings were not within the stipulated limits. The quality of indoor air at the studied locations was not appropriate for long term protection and preservation of their precious collections. Hence some preventive measures must be taken to safeguard these documentary assets. Practical implications - The indoor environments of library and archival collection buildings are very important for the protection and preservation of documentary assets. The study provides very useful information about the harmful indoor environmental factors and their effects on vital library and archival collections. This work would definitely help the concerning authorities to take remedial measures to control the inappropriate levels of these factors.

Investigation of Readiness and Expectations of Students of Sports Science Faculties Regarding the E-Learning Process and Their Self-Efficacy Perceptions

2021 ◽  
Vol 15 (10) ◽  
pp. 3211-3216
Author(s):  
Ahmet Yavuz Malli ◽  
Hasan Buğra Ekinci ◽  
Emrah Seçer ◽  
Nurcan Demirel ◽  
Cemil Tuğrulhan Şam
Keyword(s):  
Learning Process ◽  
Self Efficacy ◽  
Personal Information ◽  
Pearson Correlation ◽  
Linear Regression Analysis ◽  
Factors Affecting ◽  
Sports Science ◽  
Significant Difference ◽  
E Learning ◽  
Sports Sciences

Aim: The aim of this study is to examine the relationship between the readiness and expectations of the students of sports science faculties regarding the e-Learning process as well as their self-efficacy perceptions. Methods: The research group consists of 146 men and 64 women studying at the faculties of sports sciences, a total of 210 university students. “Personal Information Form”, “Readiness and Expectation Scale for e-Learning Process” and “General Self-efficacy Scale (GSE)” were applied to the participants. In the analysis of the data, the appropriateness of the parametric tests was reviewed and the independent sample t-test, ANOVA, Pearson correlation and simple linear regression analysis were used. Results: In the study, it is seen that there is no significant difference in self-efficacy perceptions and its sub-dimensions according to gender and habit of playing sports actively, but there is a statistical difference between the groups when compared according to grade level. It is found that there is a significant difference in the readiness and expectations of e-Learning in favor of women in terms of only the dimension of factors that affect success according to gender. It is observed that according to habit of playing sports actively, the scores of those who play sports are high in total score averages and in all other dimensions except for the dimension of factors affecting success, and there is a statistically significant difference between the groups in terms of access to technology and technical skills when compared according to the grade. It is seen that there is a positive linear relationship between self-efficacy perception and readiness and expectation for e-Learning, and that self-efficacy perception explains 6% of the variance in readiness and expectations for e-Learning. Conclusion: In the research, it is concluded that the self-efficacy perceptions and readiness for e-Learning of those who play sports actively are higher, and that self-efficacy perception is an important predictor of their readiness and expectations regarding e-Learning. Keywords: E-Learning, Self-Efficacy Perception, Sports Sciences, Distance Education

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