scholarly journals Do Bush Control Techniques Have an Effect on the Density, Cover and Recruitment of Woody Plants in a Semi-Arid Savanna? The Case of a Semi-Arid Savanna, Southern Ethiopia

2021 ◽  
Vol 9 ◽  
Author(s):  
Malicha L. Hare ◽  
Yong D. Wang ◽  
Xin W. Xu ◽  
You Yuan ◽  
Zhou Na ◽  
...  
Keyword(s):  
Woody Species ◽  
Ground Level ◽  
Management Plan ◽  
Southern Ethiopia ◽  
Negative Effects ◽  
Control Techniques ◽  
Tree Thinning ◽  
The Relationship ◽  
Acacia Mellifera ◽  
Semi Arid

High bush density and cover have negative effects on the environment in general and on livestock production, in particular in savanna rangelands. The study examined the effects of bush control techniques on woody sapling recruitment in the low land savanna region. The study consisted of 21 plots located next to each other on an area of 5.3 ha encroached by Acacia mellifera and Acacia reficiens trees. Seven bush control treatments were assigned randomly to the plots and replicated three times. In the bush clearing plot, woody species were removed at ground level using a handsaw. In the tree thinning; thinning and grazing; thinning and browsing; thinning and fire, and thinning with fire-browsing treatments, trees were thinned to the equivalents of 60% of the density of that of the control plot. Positive changes in sapling densities were observed in the clearing, thinning, and thinning and grazing treatments. In contrast, the control, thinning and browsing, and thinning and fire treatments presented negative changes in densities. A change in sapling density was highest in the cleared plot, whereas it was lowest in the thinning, fire, and browsing treatment. The correlation between changes in sapling densities and new recruitments was highly (p < 0.001) significant in the clearing, thinning, and thinning and grazing treatments thus increased sapling recruitment with the proportion greater for the clearing treatment. The significant correlation induced average sapling recruitment in the control, and low in the thinning with browsing and thinning with fire treatments. The relationship was insignificant in the thinning, fire, and browsing combination treatment and resulted in the lowest rate of saplings’ recruitment. Postthinning techniques reduced woody tree recruitment and would sustain open savanna under the continuous management plan.

Retrospective analysis of the resilience of Russian regions as socio-economic systems

2019 ◽  
pp. 46-64 ◽  
Author(s):  
Vladimir V. Klimanov ◽  
Sofiya М. Kazakova ◽  
Anna A. Mikhaylova
Keyword(s):  
Panel Data ◽  
Economic Systems ◽  
Financial Indicators ◽  
Russian Regions ◽  
Integral Index ◽  
Negative Effects ◽  
Economic Resilience ◽  
Correlation Dependence ◽  
The Impact ◽  
The Relationship

The article examines the impact of various socio-economic and financial indicators on the resilience of Russian regions. For each region, the integral index of resilience is calculated, and its correlation dependence with the selected indicators is revealed. The study confirms the relationship between fiscal resilience and socio-economic resilience of the regions. The analysis of panel data for 75 regions from 2007 to 2016 shows that there are significant differences in the dynamics of indicators in different periods. In particular, the degree of exposure to the negative effects of the crises of 2008—2009 and 2014—2015 in non-resilient regions is higher than in resilient ones.

BATOMBE: WARISAN BUDAYA BANGSA DARI NAGARI ABAI PROVINSI SUMATERA BARAT

2017 ◽  
Vol 7 (2) ◽  
pp. 159
Author(s):  
Eva Krisna
Keyword(s):  
Oral Tradition ◽  
Multidisciplinary Approach ◽  
Descriptive Analysis ◽  
Community Life ◽  
Psychological Approach ◽  
Negative Effects ◽  
Great House ◽  
Close Relationship ◽  
West Sumatra ◽  
The Relationship

“Batombe” is an oral tradition of the Nagari Abai society at Sangir Batanghari Subdistrict, South Solok District, West Sumatra Province. Batombe is exchanging rhymes (berbalas pantun) which is performed as an entertainment on the wedding party (baralek). Batombe is identical with Great House (Rumah Gadang) Nagari Abai which is a unique house because it is a long traditional custom house that has many rooms. It reaches 21 rooms. The rhymes in batombe tends to deliver a feeling of lilting so the singers often drift into the atmosphere of the show. Therefore, as part of community life, batombe often cause a negative effects for the singers soul. This paper describes various things, such as: who batombe singer is; the time to perform this activity; the relationship between batombe and Great House (Rumah Gadang) at Nagari Abai; and the negative effects caused by batombe for the singers. This paper based on the fact that in oral tradition there is a close relationship between text and the speakers and text with context (place, time and atmosphere), a multidisciplinary approach is used in this paper, such as historical, sociological, anthropological, and psychological approach. The method used is descriptive analysis method.AbstrakBatombe adalah tradisi lisan masyarakat Nagari Abai, Kecamatan Sangir Batanghari, Kabupaten Solok Selatan, Provinsi Sumatra Barat. Batombe adalah tradisi berbalas pantun yang dilakukan sebagai hiburan pada pesta pernikahan (baralek). Batombe identik dengan rumah gadang Nagari Abai yang unik, yakni rumah adat dengan ruangan yang sangat panjang hingga 21 ruangan. Pantun-pantun batombe cenderung menyampaikan perasaan yang mendayu-dayu sehingga para pedendangnya sering hanyut ke dalam suasana pertunjukan. Oleh sebab itu, sebagai bagian dari kehidupan masyarakat, seringkali batombe menyebabkan efek negatif bagi (kejiwaan) para pedendangnya. Tulisan ini mendeskripsikan berbagai hal, seperti penutur batombe, waktu untuk melakukan batombe, hubungan batombe dengan rumah gadang di Nagari Abai, dan efek negatif yang ditimbulkan batombe bagi pedendangnya. Tulisan ini bertolak dari kenyataan bahwa pada tradisi lisan terdapat hubungan erat, antara lain seperti teks dengan penutur dan teks dengan konteks (tempat, waktu, dan suasana). Pendekatan multidisipliner digunakan pada tulisan ini, yakni pendekatan historis, sosiologis, antropologis, dan psikologis. Metode yang digunakan adalah metode analisis deskriptif.

Erfolg der Jungwaldpflege im Schweizer Mittelland? Analyse und Folgerungen (Essay)

2013 ◽  
Vol 164 (9) ◽  
pp. 262-270 ◽  
Author(s):  
Peter Ammann
Keyword(s):  
Stand Development ◽  
Negative Effects ◽  
Tree Species Composition ◽  
Natural Processes ◽  
Course Of Action ◽  
Tree Thinning ◽  
Swiss Plateau ◽  
Self Differentiation ◽  
The Cost ◽  
Young Growth

Is young growth tending successful in the Swiss Plateau region? Analysis and implications (essay) The effect of the cost-intensive young growth tending used up to the present in the region of the Swiss Plateau is analysed using different approaches. It is evident that young growth tending is not only ineffective with respect to diameter growth but even hinders stand development. Negative effects on quality from young growth tending are also recognised. This is often due to premature interventions in the natural processes of self-differentiation and subsequent systematic errors in the thinning. Furthermore, the effect of tending measures on the tree species composition is often overestimated because in the first 10 to 20 years of stand development, it is primarily the rejuvenation strategy and the site which are decisive. As an alternative course of action, tending concepts are proposed which rely on biological rationalisation and future tree thinning, to achieve future trees which are as vigorous as possible. These are not only more effective, but are also significantly less expensive.

The Effects of P75NTR on Learning Memory Mediated by Hippocampal Apoptosis and Synaptic Plasticity

2020 ◽  
Vol 26 ◽  
Author(s):  
Jun-Jie Tang ◽  
Shuang Feng ◽  
Xing-Dong Chen ◽  
Hua Huang ◽  
Min Mao ◽  
...  
Keyword(s):  
Synaptic Plasticity ◽  
Learning And Memory ◽  
Neurological Diseases ◽  
Neurotrophin Receptor ◽  
P75 Neurotrophin Receptor ◽  
Negative Effects ◽  
Apoptotic Effect ◽  
New Ideas ◽  
The Relationship

: Neurological diseases bring great mental and physical torture to the patients, and have long-term and sustained negative effects on families and society. The attention to neurological diseases is increasing, and the improvement of the material level is accompanied by an increase in the demand for mental level. The p75 neurotrophin receptor (p75NTR) is a low-affinity neurotrophin receptor and involved in diverse and pleiotropic effects in the developmental and adult central nervous system (CNS). Since neurological diseases are usually accompanied by the regression of memory, the pathogenesis of p75NTR also activates and inhibits other signaling pathways, which has a serious impact on the learning and memory of patients. The results of studies shown that p75NTR is associated with LTP/LTD-induced synaptic enhancement and inhibition, suggest that p75NTR may be involved in the progression of synaptic plasticity. And its pro-apoptotic effect is associated with activation of proBDNF and inhibition of proNGF, and TrkA/p75NTR imbalance leads to pro-survival or pro-apoptotic phenomena. It can be inferred that p75NTR mediates apoptosis in the hippocampus and amygdale, which may affect learning and memory behavior. This article mainly discusses the relationship between p75NTR and learning memory and associated mechanisms, which may provide some new ideas for the treatment of neurological diseases.

scholarly journals The Influence of Increased Salvage Felling on Forwarding Distance and the Removal—A Case Study from Croatia

Forests ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Andreja Đuka ◽  
Zoran Bumber ◽  
Tomislav Poršinsky ◽  
Ivica Papa ◽  
Tibor Pentek
Keyword(s):  
Spatial Distribution ◽  
Management Plan ◽  
Management Unit ◽  
Negative Effects ◽  
Forest Operations ◽  
Spatial Reference ◽  
Infrastructure Network ◽  
Gis Environment ◽  
Research Period

During the seven-year research period, the average annual removal was by 3274 m3 higher than the average annual removal prescribed by the existing management plan (MP). The main reason lies in the high amount of salvage felling volume at 55,238 m3 (38.3%) in both the main and the intermediate felling due to oak dieback. The analysis of forest accessibility took into account the spatial distribution of cutblocks (with ongoing felling operations) and the volume of felled timber for two proposed factors: (1) the position of the cutblock and (2) the position of the removal. Cutblock position factor took into account the spatial position of the felling areas/sites, while removal position factor besides the spatial reference took into account the amount of felled timber (i.e., volume) both concerning forest infrastructure network and forest operations. The analysed relative forest openness by using geo-processing workflows in GIS environment showed four types of opening areas in the studied management unit (MU): single-opened, multiple-opened, unopened and opened areas outside of the management unit. Negative effects of the piece-volume law and low harvesting densities on forest operations are highlighted in this research due to high amount of salvage felling particularly in the intermediate felling by replacing timber volume that should have come from thinnings.

scholarly journals Differences between the Sexes in the Relationship between Chronic Pain, Fatigue, and QuickDASH among Community-Dwelling Elderly People in Japan

Healthcare ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 630
Author(s):  
Satoshi Shimo ◽  
Yuta Sakamoto ◽  
Takashi Amari ◽  
Masaaki Chino ◽  
Rie Sakamoto ◽  
...  
Keyword(s):  
Chronic Pain ◽  
Elderly People ◽  
Physical Disability ◽  
The Elderly ◽  
Daily Basis ◽  
Community Dwelling ◽  
Negative Effects ◽  
The Relationship ◽  
Elderly Healthcare ◽  
Disability Research

Chronic pain and fatigue have negative effects on the health, ADL, work, and hobbies of the elderly. As the proportion of people 65 years of age and older in the population increases, chronic pain and disability research regarding this group is receiving more consideration. However, little empirical evidence of the association between chronic pain, fatigue, and physical disability between the sexes is available. This study investigated the association between chronic pain, fatigue, and instrumental activities of daily living among community-dwelling elderly people by sex in Japan. Concerning the presence of chronic pain, 61% of males and 78% of females reported chronic pain, indicating that many elderly people living in the community suffer from chronic pain and fatigue on a daily basis. The number of sites of chronic pain was higher in females than in males (p = 0.016), with more chronic pain in the knees (p < 0.001) and upper arms (p = 0.014). Regarding chronic pain, males showed a higher correlation with QuickDASH-DS (rs = 0.433, p = 0.017) and QuickDASH-SM (rs = 0.643, p = 0.018) than females. Furthermore, fatigue also showed a higher correlation with QuickDASH-W (rs = 0.531, p = 0.003) in males than in females. These results indicate that the association between chronic pain, fatigue, and QuickDASH differed between the sexes among community-dwelling elderly people in Japan. A better understanding of the risk factors for elderly chronic pain and fatigue among sexes will facilitate the development of elderly healthcare welfare and policies.

Large shrubs partly compensate negative effects of grazing on hydrological function in a semi-arid savanna

2019 ◽  
Vol 38 ◽  
pp. 58-68 ◽  
Author(s):  
Arnim Marquart ◽  
David J. Eldridge ◽  
Samantha K. Travers ◽  
James Val ◽  
Niels Blaum
Keyword(s):  
Negative Effects ◽  
Semi Arid

Overcoming the Dark Side of Closed Networks in Cultural Tourism Clusters: The Importance of Diverse Networks

2017 ◽  
Vol 59 (3) ◽  
pp. 239-256 ◽  
Author(s):  
Ángela Martínez-Pérez ◽  
Marie-Michele Beauchesne
Keyword(s):  
Social Capital ◽  
Developed Countries ◽  
Cultural Tourism ◽  
Dark Side ◽  
Negative Effects ◽  
Firm Level ◽  
Firm Innovation ◽  
Closed Networks ◽  
The World ◽  
The Relationship

Despite the recognized importance of tourism as an engine of economic growth in developed countries, research on the antecedents of innovation in this sector has been sparse, especially in the context of tourism clusters. Scholars have suggested that social capital is a key determinant of firm innovation in the context of tourism clusters, but empirical evidence has been lacking. The aim of this article is to empirically study the interplay between social capital and innovation in the context of tourism clusters at firm level. More specifically, we analyzed the effects of closed networks and diverse networks on firm innovation using a sample of 215 hospitality and tourism firms located in the World Heritage Cities of Spain. Results showed an inverted-U-shaped relationship between closed networks and firm innovation. Consistent with existing literature, these findings suggest that whereas a certain degree of strength and density helps to promote innovation, a critical point may exist beyond which innovation stabilizes or deteriorates when the information of the network becomes too redundant. In addition, we found that diverse networks positively moderated the relationship between closed networks and firm innovation. In other words, structural holes appear to mitigate the negative effects arising from excess strength and density and encourage the development of innovations beyond what a firm relying solely on closed networks could achieve. In practice, these results suggest firms in tourism clusters should not exclusively focus on typical closed networks but also create connections with diverse agents to maximize their potential for innovation.

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