scholarly journals Caracterización ficológica en manantiales de la cuenca baja del sistema hidrológico del Pánuco, México

2017 ◽  
pp. 21 ◽  
Author(s):  
Javier Carmona-Jiménez ◽  
Gustavo Montejano-Zurita
Keyword(s):  
Environmental Factors ◽  
Light Intensity ◽  
Current Velocity ◽  
Growth Forms ◽  
Factors Affecting ◽  
Similarities And Differences ◽  
The Relationship

The results of a phycofloristic study on three springs in the Huasteca Potosina region are presented; 67 species are reported. Floristic similarities and differences among the springsare analized, as well as the relationship between species and environmental factors. Microhabitas were defined in the springs as well as the principal algal asociations that characterize them. Light intensity and current velocity are the most important factors affecting the predominant growth forms present in this type of habitat.

scholarly journals Effects of Canopy Microclimate on Chinese Chestnut (Castanea mollissima Blume) Nut Yield and Quality

Forests ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 97
Author(s):  
Yue Wen ◽  
Shuchai Su ◽  
Haicheng Zhang
Keyword(s):  
Environmental Factors ◽  
Light Intensity ◽  
Chinese Chestnut ◽  
Yield And Quality ◽  
Canopy Position ◽  
Castanea Mollissima ◽  
Positive Correlations ◽  
The Relationship

There are considerable differences in chestnut yield and quality across different chestnut-producing regions in China, indicating that environmental factors affect these properties of chestnuts. Furthermore, nut yield and quality differ depending on canopy position. Therefore, this study investigated the relationship between the canopy microclimate, nut yield, and quality. We determined microclimate factors from blossoming to ripening at different positions in the canopy. Nut yield and quality and the number of different branch types were measured at various canopy positions. The light intensity and temperature of the different canopy layers exhibited funnel-form distributions ranging from 0 to 3600 μmol·m2·s−1 and from 32 to 37 °C, respectively. Canopy humidity showed an inverted funnel-shaped distribution ranging from 26% to 40%. Nut yield and quality in the top and outer canopies were higher than in the bottom and inner canopies. Branches in the top-middle and peripheral parts of the canopy also produced higher yields, especially strong branches that bore more nuts. Nut yield and quality had positive correlations with light intensity (r = 0.735) and temperature (r = 0.709), whereas they were inversely associated with humidity (r = −0.584). The nut yield was more than 200 gm−3 when the light intensity was above 1500 μmol·m2·s−1, the temperature was above 34.4 °C, and the humidity was below 27.5%.

scholarly journals The Model of Odonate Diversity Relationship with Environmental Factors Based on Path Analysis

el–Hayah ◽  
2016 ◽  
Vol 6 (1) ◽  
pp. 07
Author(s):  
Bambang Feriwibisono ◽  
Marsoedi Marsoedi ◽  
Amin Setyo Leksono
Keyword(s):  
Water Quality ◽  
Environmental Factors ◽  
Light Intensity ◽  
Structural Equation Model ◽  
Structural Equation ◽  
Equation Model ◽  
Water Velocity ◽  
Microsoft Excel ◽  
Vegetation Characteristics ◽  
The Relationship

This study aims to analyze and describe the relationship between altitude, aerial variables (temperature, light intensity, humidity), water qualities (water temperature, pH, BOD, COD, DO, TOM, and water velocity), and vegetation with the diversity of Odonate assemblages. Odonate samplings were conducted at six survey sites based on altitude and vegetation characteristics. Measurement of altitude, aerial variables, water qualities and vegetation characteristics were replicate in the first day and third day. Analysis of correlations of all environmental factors with the odonate diversity was done through structural equation model using Partial Least Squares (PLS), Open source Smart Software and Microsoft Excel. The aerial variables and water qualities affected indirectly on odonate diversity. The aerial variables directly or with interaction to other factor affected the water qualities and vegetation characteristics. The vegetation characteristics directly influenced to odonate diversity. Water flow affected water quality, light intensity affected the aerial, while morning period observation affected the odonate diversity. Predictive relevance (Q2) for a model designed amounted to 99.95%, while the rest of 0.05% are explained by other variables.<p> </p>

scholarly journals Method for the quantitative evaluation of ecosystem services in coastal regions

PeerJ ◽  
2019 ◽  
Vol 6 ◽  
pp. e6234
Author(s):  
Tomonari Okada ◽  
Yugo Mito ◽  
Erina Iseri ◽  
Toshiyuki Takahashi ◽  
Takanori Sugano ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Environmental Factors ◽  
Social Systems ◽  
Tidal Flats ◽  
Environmental Conservation ◽  
The State ◽  
Improvement Project ◽  
Factors Affecting ◽  
Environmental Improvement ◽  
The Relationship

Wetlands, tidal flats, seaweed beds, and coral reefs are valuable not only as habitats for many species, but also as places where people interact with the sea. Unfortunately, these areas have declined in recent years, so environmental improvement projects to conserve and restore them are being carried out across the world. In this study, we propose a method for quantifying ecosystem services, that is, useful for the proper maintenance and management of artificial tidal flats, a type of environmental improvement project. With this method, a conceptual model of the relationship between each service and related environmental factors in natural and social systems was created, and the relationships between services and environmental factors were clarified. The state of the environmental factors affecting each service was quantified, and the state of those factors was reflected in the evaluation value of the service. As a result, the method can identify which environmental factors need to be improved and if the goal is to increase the value of the targeted tidal flat. The method demonstrates an effective approach in environmental conservation for the restoration and preservation of coastal areas.

scholarly journals Environmental factors affecting splash erosion in the mountain area (the Western Polish Carpathians)

2018 ◽  
Vol 36 ◽  
pp. 97-111
Author(s):  
Małgorzata Kijowska-Strugała ◽  
Krzysztof Kiszka
Keyword(s):  
Environmental Factors ◽  
Erosion Rate ◽  
Organic Matter Content ◽  
Matter Content ◽  
Slope Gradient ◽  
Mountain Area ◽  
Factors Affecting ◽  
Splash Erosion ◽  
Polish Carpathians ◽  
The Relationship

The aim of this study was to examine the effects of various environmental factors on splash erosion based on the funnel method under natural conditions. The relationship between splash and wash erosion were also studied. The intermediate timescale study (2012–2016, from May to October) was conducted in the Western Polish Carpathians where Inceptisols predominate. The splash erosion rate (kg m−2) was variable and showed a strong correlation with environmental factors, including rainfall parameters, land use (black fallow, meadow), slope gradient (0°, 11°), and also the particle size of soil and usage time (organic matter content, OM). The splash erosion rate on the slope with black fallow was 95 times higher than in the meadow and up to 20 times higher than in flat area. The average downslope splash erosion was 75% higher than the upslope splash erosion, and the soil particles were detached to maximum heights of 50 cm (downslope). There was a positive correlation between splash erosion and wash and a negative correlation between splash erosion and OM.

Distribution of annual Trifolium species in Morocco

1993 ◽  
Vol 44 (6) ◽  
pp. 1303 ◽  
Author(s):  
PE Beale ◽  
M Bounejmate ◽  
A Lahlou ◽  
DB Marx ◽  
S Christiansen
Keyword(s):  
Environmental Factors ◽  
Seed Yield ◽  
Phosphorus Content ◽  
Climatic Factors ◽  
Natural Distribution ◽  
Factors Affecting ◽  
Determinant Factors ◽  
Number Of Species ◽  
The Relationship

An ecogeographic survey was conducted in six key agricultural zones in Morocco to study the abundance and the relationship between the natural distribution of annual Trifolium species and environmental factors. Sixteen species of annual Trifolium species were identified. Most prolific was T. scabrum and the least were T. striatum and T. bocconei. Fifty-five percent of the sites had no Trifolium and the average number of species per site was 2.2. An average seed yield of 4.8 kg ha-1 was obtained. Both soil and climatic factors affected the occurrence of Trifolium species. Rainfall, pH and phosphorus content were the most determinant factors affecting the distribution of Trifolium species in Morocco.

A CONCEPTUAL MODEL FOR DEPICTING THE RELATIONSHIP BETWEEN ENTREPRENEURSHIP AND THE ENVIRONMENTAL FACTORS IN SINGAPORE

1994 ◽  
Vol 01 (03n04) ◽  
pp. 449-472 ◽  
Author(s):  
SOKE-YIN WONG ◽  
CHARMAINE LAI-YEEN WONG ◽  
RICKY YUET-KEE KWAN ◽  
VATVANI CHANDRA GANSHAM
Keyword(s):  
Environmental Factors ◽  
External Factors ◽  
Personal Attributes ◽  
Internal Factors ◽  
Factors Affecting ◽  
Technological Advances ◽  
Market Opportunities ◽  
Social And Cultural Factors ◽  
The Relationship

The degree to which environmental factors foster/hinder entrepreneurship is unique to each individual entrepreneur. It is hence not possible to describe the “average” entrepeneur and the “typical” process of venture creation and management. As such, in this paper, a new model conceptualising the relationship between entrepreneurship and environmental factors is proposed. In this model, entrepreneurship (E) is conceptualised as being a function of the environmental factors (Ef) and personal attributes of the entrepreneur (Pa). Hence, E=f(Ef, Pa). The environmental factors affecting E are further categorised into a set of internal factors (Fin) and a set of external factors (Fex). Several studies have already been undertaken to examine the personal attributes of entrepreneurs in Singapore which explains for their success/failure. This study focuses on Ef in Singapore to assess the favorability of Singapore’s environment in promoting entrepreneurship and entrepreneurship development. A set of questionnaire designed for this purpose was sent to over 100 entrepreneurs, from which we received 44 usable responses. Environmental factors surveyed include financing, government assistance schemes, availability of labour, opportunity cost, competition by multi-national and government-related companies, the education system, social and cultural factors, technological advances and market opportunities. A detailed case study was also conducted with a successful local entrepreneur to further refine and validate our findings. Our findings appear to indicate that in Singapore, external factors are more conducive in fostering entreneurship than the internal factors.

Factors Affecting Job Satisfaction In Two Automotive Industries In Malaysia

2012 ◽  
Author(s):  
Siti Zawiah Dawal ◽  
Zahari Taha
Keyword(s):  
Job Satisfaction ◽  
Environmental Factors ◽  
Work Experience ◽  
Job Characteristics ◽  
Work Design ◽  
Manufacturing Companies ◽  
Automotive Manufacturing ◽  
Factors Affecting ◽  
Multiple Choice Questionnaire ◽  
The Relationship

Satu tinjauan telah dijalankan untuk menyiasat perhubungan di antara kepuasan kerja, ciri-ciri tugasan dan faktor suasana yang mempengaruhi reka bentuk kerja di dua buah syarikat pembuatan automotif di Malaysia. Matlamat utama kajian adalah untuk menentukan faktor-faktor yang mempengaruhi persepsi pekerja terhadap tugas mereka. 170 orang subjek lelaki berumur di antara 18 tahun hingga 40 tahun dengan purata umur 26.8 tahun dengan sisihan piawai (SP) 5.3 tahun dan purata pengalaman kerja 6.5 tahun dengan SP 4.9 tahun telah mengambil bahagian. Satu set soalan pelbagai pilihan telah dihasilkan dan maklumat dikumpulkan dengan cara menemuduga pekerja di kilang pengeluaran tersebut. Hasil tinjauan menyokong kajian dengan menunjukkan bahawa ciri-ciri tugasan dan faktor-faktor suasana mempunyai hubungan yang signifikan dengan kepuasan kerja. Kata kunci: Kepuasan kerja, ciri-ciri tugasan, faktor-faktor suasana, reka bentuk kerja, industri automotif A survey was conducted to investigate the relationship between job satisfaction, job characteristics and environmental factors that affect work design in two automotive manufacturing companies in Malaysia. The aim of the study is to determine the factors that influence employees’ perception towards their work. 170 male subjects between the ages of 18 to 40 years with the mean age of 26.8 and standard deviation (SD) of 5.3 years and mean work experience of 6.5 and SD of 4.9 years were involved. A set of multiple choice questionnaire was developed and data was collected by interviewing the employees at the production plants. The survey focused on job satisfaction, job characteristics and environmental factors. The results showed that job characteristics and environmental factors were significantly related to job satisfaction. Key words: Job satisfaction, job characteristic factors, environmental factors, work design, automotive industry

scholarly journals Climatic Factors Affecting Density of Aedes aegypti (Diptera: Culicidae) in Kassala City, Sudan 2014/2015

2019 ◽  
Vol 2 (2) ◽  
pp. 58-68
Author(s):  
Ahmed RM ◽  
Hassan SM ◽  
Elrahman AH
Keyword(s):  
Environmental Factors ◽  
Aedes Aegypti ◽  
Climatic Factors ◽  
Larval Instar ◽  
Hemorrhagic Fever ◽  
Factors Affecting ◽  
Autumn Season ◽  
Vector Population ◽  
The Relationship ◽  
The City

Transmission of Dengue Hemorrhagic fever by Aedes aegypti mosquito is influenced by several environmental factors, namely temperature, humidity, and rainfall. This study aims at identifying the relationship between environmental factors and dengue vector population density. A longitudinal entomological study was performed in the city of Kassala, Sudan, in 20 households in each of the 20 clusters during the three seasons of 2014 and 2015. Data were collected using spotlight in any water-holding container where immature stages of Aedes spp. were detected. Immature mosquitoes were counted and classified into larvae and pupae. Ambient temperature and relative humidity in each cluster were recorded, and the total rainfall of Kassala City was obtained from the main Meteorological Station in Khartoum. There was a significant positive correlation between rainfall and number of Ae. aegypti females at Garb Algash and Khatmia areas. Larval instar 4 and pupae were positively correlated with high humidity at Khatmia and Altora areas. In autumn season, there was no strong correlation of all the stages with all climatic variables. There was also positive significant correlation between ambient low temperature and number of females in autumn season.

scholarly journals Plants Flowering and Fruiting Behaviour in Alas Purwo National Park, Banyuwangi, East Java

2020 ◽  
Vol 5 (2) ◽  
pp. 132
Author(s):  
Dewi Ayu Lestari ◽  
Agung Sri Darmayanti
Keyword(s):  
Environmental Factors ◽  
Light Intensity ◽  
National Park ◽  
Forest Type ◽  
Conservation Areas ◽  
Lowland Forest ◽  
Conservation Area ◽  
Factors Affecting ◽  
Species Dominance ◽  
Number Species

Alas Purwo National Park (APNP) is a conservation area with lowland forest type. The adaptation of plants conserved is strongly influenced by environmental factors and the behaviour of flowering and fruiting. The aims of this research were to find the number, species, dominance, and abundance of flowering and fruiting plants, comparison of flowering and fruiting species, and environmental factors affecting the flowering and fruiting time in APNP observation tracks. This study used purposive random sampling in each observation track where flowering and fruiting plants were found. Environmental factors (temperature, humidity, light intensity, soil pH, elevation, and coordinates) in each observation track were measured. Data analysis was conducted using Microsoft Excel and PAST 4.0. statistic program. The behaviour of flowering and fruiting plants species in APNP was unique. There were 90 species of flowering and fruiting plants in APNP from 45 families. Most species often found flowering and fruiting were Orophea enneandra, Polyalthia littoralis and Leea angulata which were scattered in Moto Lele, Patirtan Mas, and Sadengan Savanna. Fruiting plants species were more often found than flowering ones. Temperature and light intensity became the two most affecting environmental factors on flowering and fruiting plants behaviour. The study of flowering and fruiting behaviour is very important for genetic resources conservation and conservation areas management.

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