scholarly journals The initial effects of microclimate and invertebrate exclusion on multi-site variation in the mass loss of temperate pine and oak deadwoods

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seongjun Kim ◽  
Seung Hyun Han ◽  
Guanlin Li ◽  
Yujin Roh ◽  
Hyun-Jun Kim ◽  
...  

AbstractQuantifying deadwood decomposition is prioritized by forest ecologists; nonetheless, uncertainties remain for its regional variation. This study tracked variations in deadwood decomposition of Korean red pine and sawtooth oak in three environmentally different regions of the Republic of Korea, namely western, eastern, and southern regions. After 24 months, dead pine and oak woods lost 47.3 ± 2.8% and 23.5 ± 1.6% in the southern region, 13.3 ± 2.6% and 20.2 ± 2.8% in the western region, and 11.9 ± 7.9% and 13.9 ± 2.3% in the eastern region, respectively. The regional variation in the decomposition rate was significant only for dead pine woods (P < 0.05). Invertebrate exclusion treatment reduced the decomposition rate in all region, and had the greatest effect in the southern region where warmer climate and concentrated termite colonization occurred. The strongest influential factor for the decomposition of dead pine woods was invertebrate exclusion (path coefficient: 0.63). Contrastingly, the decomposition of dead oak woods was highly controlled by air temperature (path coefficient: 0.88), without significant effect of invertebrate exclusion. These findings reflect the divergence in regional variation of deadwood decomposition between pine and oak, which might result from the different sensitivity to microclimate and decomposer invertebrates.

2019 ◽  
Vol 98 (4) ◽  
pp. 449-454
Author(s):  
Saule M. Bazarbaeva ◽  
A. S. Dinmukhamedova ◽  
R. I. Aizman

Aim. To study the features of the morphofunctional development of the Kazakh nationals of the first year of the M. Kozybaev North Kazakhstan State University arrived for training from the northern and southern regions of Kazakhstan with the goal of developing preventive measures to reduce the adaptive stress to university education. Material and methods. The study involved 400 first-year students 17-18 years old, of both genders, studying at different faculties of the M. Kozybaev North Kazakhstan State University (200 girls and 200 boys) who arrived from the northern and southern regions of the republic. Standard methods of determining anthropometric and functional indices, estimating the adaptive potential and the level of physical health were used. The resulting material is processed by the methods of ANOVA statistical methods. Results. Indices of physical development (length, body weight, chest circumference, Quetelet, Pinje and stenius indices) were shown to be within the age-gender norms, but a comparative assessment of physical health of students showed significant differences in the anthropometric and physiological state depending on the previous area of residence. Thus, the length of growth in northerners was higher than that of southerners. The indices of body weight, chest circumference, and the Quetelet index are higher in representatives of the southern regions. By the type of body build, among the girls and boys hypersthenics predominated in the southern region, normostenics - in the northern region. At the same time, with an increase in the constitution, the absolute and relative values of force indices and the vital index increased. At the same time, students in the southern region had a lower functional reserve of the heart, determined by the magnitude of the double product, the heart rate, and blood pressure. For students of the northerners of both genders, satisfactory adaptation (1st “level of health”) is typical, whereas representatives of the Southern Region had a lower level of adaptive potential, which corresponded to the state of exertion of adaptation mechanisms. Conclusion. Comparative evaluation of morpho-functional indices of the body of students of adolescence revealed features of body size, type of constitution, functional reserves of the cardiorespiratory system depending on the previous region of residence. The data obtained can be used to compile standards for the physical development of young people of different regions of the republic and the development of health programs to reduce adaptive stress.


2019 ◽  
Vol 14 (3) ◽  
pp. 53-60
Author(s):  
D. V. Makarov ◽  
E. A. Kantor ◽  
N. A. Krasulina ◽  
Z. Z. Berezhnova ◽  
Yu. S. Savicheva

Aim. Comparison of water quality according to 19 indicators: odour at 20°C, odour  at 60°C, taste, colour, turbidity, total iron, permanganate oxidation, dry residue,  total hardness, oil products, surfactants, phenolic index, nitrates (NO3‐), chlorides  (Сl‐), fluorides (F‐), sulphates (SO42‐), zinc (Zn2+), copper (Сu, total), pH value of two  infiltration water intakes in the south‐eastern region of the Republic of Belarus.  Identification and analysis of linear trends, and determination of trends in the dynamics of indicator values. Material and Methods. As initial data we used the results of quarterly measurements of the values of borehole water indicators of the infiltration water intakes.   Results. By comparing the relative concentrations of the mean annual values of the  studied quality indicators for two water intakes, it was revealed that the priority  indicators are odour at 20°C, odour at 60°C, taste, chromaticity, turbidity, and iron.  By comparing the relative concentrations of total iron, it was found that the concentration in the wells of WI 1 is much higher than in the wells of WI 2, probably  due to the presence of rocks and minerals from moraine and fluvioglacial complexes of glacial deposits. For other indicators the values were approximately on the  same level. Conclusion. By constructing matrices of pair correlation and geographic proximity  for each of the priority indicators, well groups were identified whose water quality  is interrelated and which were subsequently aggregated as a single group. 


2020 ◽  
Author(s):  
Bander Haddad ◽  
Mohammed Al-Madi ◽  
Moath Alsudais ◽  
Faisal AlMedimegh ◽  
Saqer Alharthi ◽  
...  

Abstract Background The current study aims to know the prevalence, effects and types of bullying at primary schools of Riyadh city for both male and female. Methods Male and female students at primary schools in Riyadh city are targeted using Cross-sectional study method. 517 students are included in this study 55.3% are female and 44.7% are male. Riyadh primary schools were divided into five groups according to geographic region North, South, East, West and Middle. The surveys were conducted after the approval of school's principals. In order to get an accurate response, the survey was distributed to student in classrooms in papers. Results 517 students participated in the study. Out of four regions the proportion from the Southern region were the highest at 187 (36.2%). The levels of bullying and victimization was low. Compared to female students, male students showed statistically significant higher bullying and victimization rates. Compared to the five regions in Riyadh city the bullying and victimization rate is highest in the Eastern region, and lower in the southern region. Conclusion The study shows that the levels of bullying and victimization at Riyadh's primary schools was low. Furthermore, research studies about bullying and victimization prevalence rates are not enough and need more researches to improve the intervention and prevent the side effect of it.


2005 ◽  
Vol 15 (03n04) ◽  
pp. 147-152 ◽  
Author(s):  
T. R. RAUTRAY ◽  
V. VIJAYAN ◽  
M. ASHOK ◽  
J. V. KENNEDY ◽  
V. JAYANTHI ◽  
...  

Particle Induced X-ray Emission (PIXE) technique has been used to determine the trace elements present in fourteen representative human gallstone samples collected from eastern region (Orissa) and thirteen representative samples collected from southern region (Chennai) of India. PIXE irradiation of the samples has been carried out by using the 3 MV tandem type horizontal pelletron accelerator facility at Institute of Physics, Bhubaneswar with proton beam of energy 3 MeV. In the present investigation, twenty one trace elements like S , Cl , K , Ca , Ti , V , Cr , Mn , Fe , Ni , Cu , Zn , As , Se , Br , Rb , Sr , Y , Zr , Mo and Pb have been estimated in all the three types of gallstones viz. cholesterol stone, mixed stone and pigment stone. While sulphur in cholesterol stones in the eastern region was less than that of the southern region, sulphur was present as a minor element in the pigment stones of both the regions. Less concentration of copper in the gallstones from eastern region is another interesting observation. The lower values of copper in the patients of eastern region may be due to different types of food habits. The concentrations of all the elements in the southern region pigment stones have higher values than that of the eastern region. Moreover, the concentrations of Fe and Mo in cholesterol stone and pigment stone samples in southern region have also higher values than in eastern region. The current PIXE study is of its first kind in this eastern region of India.


2011 ◽  
Vol 2 (1) ◽  
pp. 26-37
Author(s):  
Rudra P. Pradhan

An understanding the linkage between human development and poverty in general and economic development in particular is very imperative in emerging economies in the globe. The objective of this paper is to study the regional variation and causality between human development and poverty in the north-east India. The major finding of this paper is that there exists significant regional variation between human development and poverty in the north eastern states of India. While human development is substantially high in Mizoram and Manipur, it is low in other states. On the contrary, poverty is very low in Mizoram and Manipur, while it is considerably high in other states. The estimated results confirmed that human development (and its individual indicators) has a significant role to alleviate poverty in the north east India.


2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Ji-you Li ◽  
Qi-qing Zhou ◽  
Pan-pan Yin

Based on the panel data, collected through various Internet of Things (IoT) devices, of 31 various provinces and cities in the Republic of China from 2004 to 2019, due to the analysis of mechanism and the significance of coupled and coordinated development, methods like fuzzy comprehensive evaluation, entropy, coupling, and coordination degree model, exploratory spatial data analysis, and Theil index are widely used to analytically evaluate the dynamic coupling development of China’s financial and logistics industries. The analysis of the collected data shows that demand promotion, technological progress, corporate decision-making, and policy stimulus are the driving forces for the coordinated development. In addition, the coordinated development of both industries can achieve a win-win situation. Moreover, during the sample period, the level of coupled and coordinated development has made considerable progress, achieving a transition from moderate to slightly unbalanced level, but overall, it is still at a low level. The level of coupled and coordinated development is showing east-central-west, that is, a three-level declining trend. Guangdong is the province with the highest level, and Qinghai and Ningxia are the provinces with the lowest levels of coupled and coordinated development. The general evolution trend of the total difference in the levels of coupled and coordinated development is declining in fluctuation, and the differences in the eastern region and within the zones are the main reasons for the total difference.


2018 ◽  
Vol 19 (2) ◽  
pp. 417-430
Author(s):  
Hossein Bodaghi Khajeh Nobar ◽  
Reza Rostamzadeh

This research aims to investigate the impact of customer satisfaction, experience, and loyalty on brand power in the Hotel industry. This study used a descriptive-survey research design based on the correlation method. The selected populations were Pars Hotels’ customers. Sample size was 384, based on Krejcie and Morgan’s sampling table. The structural equation modeling was used to evaluate the causal simulation and to examine the reliability and validity of the measuring model. The research results showed that customer expectation has the most impact on customer satisfaction with path coefficient of 0.74. On the other hand, customer loyalty, with path coefficient of 0.65, is known as an influential factor. This study helps to understand that customer satisfaction and customer expectations are positive drivers of customer loyalty. Customer loyalty also is a strong predictor of brand power in hoteling and tourism industry. By strengthening that part, which you have better resources, you can have a better supply and thus, there would be more opportunities in establishing reputation and increasing visibility.


Sign in / Sign up

Export Citation Format

Share Document