scholarly journals Savanna Rodents’ Selective Removal of an Encroaching Plant’s Seeds Increased With Grass Biomass

2021 ◽  
Vol 9 ◽  
Author(s):  
Sarah J. Teman ◽  
Nicola Stevens ◽  
Ara Monadjem ◽  
Robert J. Fletcher ◽  
James D. Austin ◽  
...  

In savannas across the planet, encroaching woody plants are altering ecosystem functions and reshaping communities. Seed predation by rodents may serve to slow the encroachment of woody plants in grasslands and savannas. Our goals for this study were to determine if rodents in an African savanna selectively removed seeds of an encroaching plant and if foraging activity was influenced by the local vegetation structure or by the landscape context. From trials with two species of seeds (encroacher = Dichrostachys cinerea, non-encroaching overstory tree = Senegalia nigrescens) at 64 seed stations, we recorded 1,065 foraging events by seven species of granivorous rodents. We found a strong positive relationship between rodent activity and the number of seeds removed during trials. Foraging events were dominated by rodent seed predators, with <10.6% of events involving a rodent with the potential for secondary dispersal. Rodents selectively removed the seeds of the encroaching species, removing 32.6% more D. cinerea seeds compared to S. nigrescens. Additionally, rodent activity and the number of seeds removed increased at sites with more grass biomass. Our results suggest a potential mechanistic role for rodents in mitigating the spread of woody plants in grass dominated savannas.

2018 ◽  
Vol 9 (6) ◽  
pp. 529-536
Author(s):  
Martin Khoya Odipo ◽  

Recent studies have documented that innovations improve profitability of firms. This article documents that deposit taking micro financial institutions that have adopted financial innovations have increased their profitability. The study covered five years between 2009-2013. Both primary and secondary data were used in the study. Primary data was obtained through administration of drop and pick questionnaires to selected employees of the institutions. Secondary data was obtained from financial statements and management reports of these deposit taking microfinance institutions. Data was analyzed using descriptive statistics, return on asset and multi-liner regression model to determine the effect of each financial innovation applied on profitability on the micro-financial institution. The results showed that most deposit taking microfinance institutions adopted these financial innovations in their current operations. There was strong positive relationship between individual innovations and profitability. In line with profitability ROA also showed improvement each year after the adoption of these financial innovations.


2020 ◽  
Vol 2 (8) ◽  
pp. 101-110
Author(s):  
N. N. ILYSHEVA ◽  
◽  
E. V. KARANINA ◽  
G. P. LEDKOV ◽  
E. V. BALDESKU ◽  
...  

The article deals with the problem of achieving sustainable development. The purpose of this study is to reveal the relationship between the components of sustainable development, taking into account the involvement of indigenous peoples in nature conservation. Climate change makes achieving sustainable development more difficult. Indigenous peoples are the first to feel the effects of climate change and play an important role in the environmental monitoring of their places of residence. The natural environment is the basis of life for indigenous peoples, and biological resources are the main source of food security. In the future, the importance of bioresources will increase, which is why economic development cannot be considered independently. It is assumed that the components of resilience are interrelated and influence each other. To identify this relationship, a model for the correlation of sustainable development components was developed. The model is based on the methods of correlation analysis and allows to determine the tightness of the relationship between economic development and its ecological footprint in the face of climate change. The correlation model was tested on the statistical materials of state reports on the environmental situation in the Khanty-Mansiysk Autonomous Okrug – Yugra. The approbation revealed a strong positive relationship between two components of sustainable development of the region: economy and ecology.


2019 ◽  
Vol 40 (2) ◽  
pp. 259-273 ◽  
Author(s):  
Morris Mendelson ◽  
Jasmine Alam ◽  
Chris Cunningham ◽  
Adam Totton ◽  
Carrie Smith

PurposeTransformational leadership has been shown to have a positive impact on a host of employee level and organizational performance indicators. However, little research has sought to understand some of the antecedents of this style of leadership. The purpose of this paper is to examine the link between having a post-secondary education and perceptions of transformational leadership.Design/methodology/approachData were collected from two surveys issued in a mid-sized energy company located on the eastern seaboard of North America. One-way ANOVA comparing employees’ perceptions of transformational leadership exhibited by their supervisors that either did or did not have a post-graduate degree demonstrated a strong, positive relationship between the attainment of a Master’s degree and perceived levels of transformational leadership qualities.FindingsThe findings of this quasi-experimental field study demonstrated a strong, positive relationship between the attainment of a Master’s degree and perceived levels of transformational leadership qualities.Originality/valueThis study is the first of its kind to demonstrate that more educated managers are generally perceived to be more transformational in their leadership style.


2015 ◽  
Vol 43 (5) ◽  
pp. 757-766 ◽  
Author(s):  
Yueran Wen ◽  
Liu Liu

Based on a survey of 147 Chinese employees, we examined the relationship between perceived career plateau and turnover intention, and the moderating role of career anchor in challenge in this process. We hypothesized that perceived career plateau would be positively related to turnover intention, and that this relationship would be stronger in employees with a higher level of career anchor in challenge than in those with a lower level. The results showed that perceived career plateau had a strong positive relationship with turnover intention, especially in employees with a high level of career anchor in challenge. These findings have implications for research in career development and turnover intention, as well as in management practices.


WARTA ARDHIA ◽  
2013 ◽  
Vol 39 (2) ◽  
pp. 128-145
Author(s):  
Siti Masrifah

This study examined the association of security culture (X1) and the performance of airport services (X2) with air transport passenger satisfaction (Y), either individually or jointly.This study with a sample of 100 respondents passenger air transport, the distribution of questionnaires to terminal 2F domestic at Soekarno Hatta International Airport Cengkareng.Calculation results show a positive and significant relationship shown in securing cultural relations (X1) to the satisfaction of passenger air transport (Y). Airport service performance (X2) to the satisfaction of passenger air transport (Y). The relation security culture and performance of airport service to the satisfaction of the air transport of passengers together.The final results of this study have a strong positive relationship between security culture in air transport passenger satisfaction. Strong positive relationship between performance of airport services in air transport passenger satisfaction. And a strong positive relationship between culture security and performance of airport services to the satisfaction of the air transport of passengers together.Penelitian ini untuk mengetahui hubungan budaya pengamanan (X1) dan kinerja pelayanan bandar udara (X2) dengan kepuasan penumpang angkutan udara (Y), baik secara sendiri-sendiri maupun secara bersama-sama. Penelitian ini dengan jumlah sampel sebanyak 100 responden penumpang angkutan udara, dengan melakukan sebaran kuesioner di terminal 2F domestik Bandar Udara International Soekarno Hatta Cengkareng. Hasil perhitungan menunjukkan hubungan yang positif dan signifikan pada budaya pengamanan (X1) dengan kepuasan penumpang angkutan, hubungan positif dan signifikan antara kinerja pelayanan bandar udara (X2) dengan kepuasan penumpang angkutan udara (Y), serta menghasilkan hubungan positif dan signifikan antara budaya pengamanan (X1) dan kinerja pelayanan Bandar udara (X2) dengan kepuasan penumpang angkutan udara (Y) secara bersama-sama. Hasil akhir penelitian ini mempunyai hubungan positif dan kuat antara budaya pengamanan dengan kepuasan penumpang angkutan udara. Hubungan positif dan kuat antara kinerja pelayanan Bandar udara dengan kepuasan penumpang angkutan udara. Hubungan positif dan kuat antara budaya pengamanan dan kinerja pelayanan Bandar udara dengan kepuasan penumpang angkutan udara secara bersama-sama. Implikasi bagi penyelenggara bandar udara dalam tercapainya kepuasan penumpang angkutan udara dengan memberikan rasa aman, lancar, tertib, dan selamat dalam suatu penerbangan, serta jasa pelayanan bandar udara dengan kebersihan terminal dan ketersediaan fasilitas yang cukup dan baik.


2017 ◽  
Vol 14 (1) ◽  
pp. 169
Author(s):  
Palapan Kampan

This study assesses economic, legal, and environmental conditions that Thai rubber farmers face, and evaluates actions they can take to increase incomes. Statistical analyses determine relationships between prices of oil, natural and synthetic rubber. Pearson correlation tests found a strong positive relationship (r = 0.887) between the price of Brent crude and Thai ribbed smoked sheets, and a moderate positive relationship between price changes in Brent and synthetic rubber (r = 0.648). Regression analysis showed Brent oil price is a good predictor of natural rubber prices. Moderate to strong positive relationships were also found between natural rubber price and gross domestic product of Japan, China, and the United States. Criminal antitrust behavior in rubber industries appeared to interfere with normal pricing in rubber markets. No significant bivariate correlation was found between rainfall in Thailand and natural rubber price, production, or export although flooding and other environmental issues clearly affected rubber farms. A survey of options showed Thai rubber farmers can improve livelihoods best through collective purchase and use of new technologies, and by integrating into downstream supply chain industries. At very least, farmers are urged to abandon monocrop methods and supplement incomes with fruit, fish, livestock, or pigs. stment budget, 2) architectural Aesthetic, and 3) utilization. Additionally, background of the interviewees is one of reinforcing factors for decision on universal design investment.


2021 ◽  
Vol 10 (1) ◽  
pp. 117
Author(s):  
Wanda Tri Utami ◽  
Ali Mustadi ◽  
Marsigit Marsigit ◽  
Ibrahim Ibrahim

The writing of this article is a survey research with the aim of knowing the relationship between mathematical disposition and self-efficacy of PGSD/ PGMI students in universities throughout Indonesia. This study used a total of 37 public and private universities with 357 students using questionnaire data collection techniques. The data obtained were analyzed using quantitative descriptive. In addition, data analysis used Spearman's Rho. The results explained that the mathematical disposition with self-efficacy of PGSD / PGMI students in Indonesia based on the average questionnaire filling reached a correlation coefficient of 0.612 which was included in the very strong category. Sig. Value (2-tailed) obtained 0,000 which is smaller than 0.01 which means that there is a significant relationship between mathematical disposition variables and self-efficacy. This caused a strong positive relationship between mathematical disposition and student self-efficacy. AbstrakPenulisan artikel ini merupakan penelitian survei dengan tujuan mengetahui hubungan disposisi matematis dan self-efficacy mahasiswa PGSD/PGMI yang berada di Universitas se-Indonesia. Penelitian ini menggunakan subjek yang berjumlah 37 universitas negeri dan swasta dengan 357 mahasiswa dengan tekhnik pengumpulan data penyebaran angket. Data yang diperoleh dianalisis menggunakan deskriptif kuantitatif. Selain itu, analisis data menggunakan Spearman’s Rho. Hasil penelitian menjelaskan bahwa disposisi matematis dengan self-efficacy mahasiswa PGSD/PGMI yang berada di Indonesia berdasarkan rata-rata pengisian angket mencapai koefisien korelasi 0.612 yang termasuk dalam kategori sangat kuat. Nilai Sig. (2-tailed) didapat 0.000 yang lebih kecil dari 0.01 yang memiliki makna bahwa terdapat hubungan signifikan antara variabel disposisi matematis dengan self-efficacy. Hal tersebut menyebabkan hubungan positif yang kuat antara disposisi matematis dengan self-efficacy mahasiswa. 


Author(s):  
Tatiana Dorofieieva

The issue of teaching physical education in secondary schools has already received wide coverage in various scientific studies. Until recently, insufficient attention has been paid to the topic of studying the motives of physical culture and sports, including attending lessons on "Physical culture". The purpose of the article is to study the perceptions of the residents of territorial communities about the motives of schoolchildren's participation in "Physical Culture" lessons. Organization of the study. The study was conducted in 8 territorial communities of Dnipropetrovsk, Zaporizhia and Kharkiv regions. Respondents numbering 1,089 people (674 students and 415 adults) were involved. Peculiarities of adults 'and high school students' ideas about the motives of schoolchildren's participation in "Physical Culture" lessons were studied with the help of specially prepared questions. The calculation of the correlation between the representations of adults and students was performed using the Spearman rank correlation coefficient ρ. Result. Significant differences in the perceptions of the respondents regarding the motives of participation of schoolchildren of different communities in the lessons on "Physical Culture" are proved. At the same time, the calculation of the correlation between the perceptions of adults and students by the coefficient of rank correlation ρ Spearman in the Cirkunov community has an index of 0,2, which indicates a weak positive relationship between the perceptions of adults and students. Whereas in the Stepnogorsk community this indicator is 0,93, which indicates a strong positive relationship between the perceptions of adults and students.


Weed Science ◽  
1987 ◽  
Vol 35 (2) ◽  
pp. 145-148 ◽  
Author(s):  
Jim M. Story ◽  
Robert M. Nowierski ◽  
Keith W. Boggs

A survey was conducted at 88 sites in Montana in 1984 and 1985 to determine the distribution of Urophora affinis Frauenfeld and U. quadrifasciata (Meigen), two seed head flies released on spotted knapweed (Centaurea maculosa Lam. # CENMA) in North America. U. affinis, released in Montana during 1973 to 1977, was found at 40 of the 88 sites. The fly was concentrated within a short radius (about 5 to 8 km) of release sites, even at sites having well-established populations. U. quadrifasciata, released in British Columbia in 1972, but not in the United States, was found at 84 sites. The data suggest that the fly entered the state in the northwest corner and dispersed in a southeasterly direction. There was a strong positive relationship between mean number of galls per seed head and percent infestation for both fly species.


2017 ◽  
Vol 4 (2) ◽  
pp. 29
Author(s):  
Jean Bosco Harelimana

The main aim of the study is to find out the role of microfinance ‘services on increasing revenue of COMICOKA'members. With access to these financial savings and credit services, members can start new businesses or improveon the existing businesses and engage in any other productive activities as well as learning how to use money wiselyand consequently improve on their revenue. Both primary and secondary data were collected then analyzed throughMFI Factsheet, SPSS version 16.0 tools (Pearson correlation, and multi regression analysis), so that the correlationand strength between variables can have been determined.The findings revealed that savings services were moderately favorable to members and correlation results indicatesthere is a strong positive relationship between savings services and members’ income (r=0.784, sig=0.000). There isa strong positive relationship between credit services and members’ revenue (r=0.591, sig=0.000). From the findings,the study concludes that savings and credit at COMICOKA have got a significant effect on members’ revenue. Bothsavings and credit services are significantly correlated with members’ revenue and significantly predict member’revenue. Both savings and credit services were rated moderately.


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