scholarly journals Pollinators mediate floral microbial diversity and network under agrochemical disturbance

2020 ◽  
Author(s):  
Na Wei ◽  
Avery L. Russell ◽  
Abigail R. Jarrett ◽  
Tia-Lynn Ashman

AbstractHow pollinators mediate microbiome assembly in the anthosphere is a major unresolved question of theoretical and applied importance in the face of anthropogenic disturbance. We addressed this question by linking visitation of diverse pollinator functional groups (bees, wasps, flies, butterflies, beetles, true bugs and other taxa) to the key properties of floral microbiome (microbial α- and β-diversity and microbial network) under agrochemical disturbance, using a field experiment of bactericide and fungicide treatments on cultivated strawberries that differ in flower abundance. Structural equation modeling was used to link agrochemical disturbance and flower abundance to pollinator visitation to floral microbiome properties. Our results revealed that (1) pollinator visitation influenced the α- and β-diversity and network centrality of floral microbiome, with different pollinator functional groups affecting different microbiome properties; (2) flower abundance influenced floral microbiome both directly by governing the source pool of microbes and indirectly by enhancing pollinator visitation; and (3) agrochemical disturbance affected floral microbiome primarily directly by fungicide, and less so indirectly via pollinator visitation. These findings improve the mechanistic understanding of floral microbiome assembly, and may be generalizable to many other plants that are visited by diverse insect pollinators in natural and managed ecosystems.

2018 ◽  
Vol 13 (1) ◽  
pp. 90-104
Author(s):  
Sukarni Novita Sari

Tourism sector became strategic and significant when it taken seriously and done professionally. Selling tourism products and services need not only a coordination, but a good cooperation between all organizations that are responsible for developing tourism sector and all parties involved or associated with tourism activities. One effort that can be done is to develop a marketing strategy that is expected to attract tourists back and also can create self-satisfaction in tourists.To obtain optimal results, this marketing strategy has a broad scope in the field of marketing of which is a strategy in the face of competition, pricing strategy, product strategy, service strategy and so on. Therefore, this study will analyze about the influence of marketing strategies and quality of service to tourist satisfaction.The method used in this research is quantitative with the questionnaire as a data collection tool to obtain the responses of the respondents regarding the variables in this study. The data analysis technique used in this research is Structural Equation Modeling (SEM). Respondents involved in this study are 120 tourists that also customers of CV Ryzqi Samudra.The research proves that the marketing strategy has a positive and significant impact on the quality of services and satisfaction of tourists. Variable quality of service also has a positive and significant impact on tourist satisfaction.


Author(s):  
Yohanes Andrianto ◽  
Singgih Santoso

The phenomenon of the emergence of many souvenir shops in the Purbalingga area of Central Java has resulted in increasingly strong business competition. In order to survive in the face of competition, business actors need to pay attention to important aspects in running their business. The author takes several aspects, namely the dimensions of service quality (physical evidence, reliability, responsiveness, assurance, empathy) and the dimensions of the marketing mix (products, prices, places, promotions) that can influence customer loyalty with customer satisfaction as mediation. The author makes the Original Nopia Shop as a research object because the shop is one of the souvenir shops that are quite old and famous in the Purbalingga area. The design of this study was a survey using a questionnaire distributed to 200 respondents of Original Nopia Store customers with a purposive random sampling method. Research variables were analyzed using Structural Equation Modeling (SEM) and obtained the following results: (1) Service quality significantly influences customer satisfaction, (2) Marketing Mix does not significantly influence customer satisfaction, (3) Consumer satisfaction has a significant effect on consumer loyalty, (4) consumer satisfaction does not mediate between the influence of service quality on consumer loyalty, (5) consumer satisfaction is able to mediate between the influence of marketing mix on consumer loyalty, (6) consumer satisfaction does not mediate between the influence of service quality and marketing mix simultaneously towards consumer loyalty.


2020 ◽  
Vol 44 (4) ◽  
pp. 325-338 ◽  
Author(s):  
Johnmarshall Reeve ◽  
Sung Hyeon Cheon ◽  
Tae Ho Yu

In the face of everyday classroom challenges, students display resilience by responding with increased agentic engagement. We hypothesized that this tendency toward greater initiative and lesser passivity was both an outcome of autonomy need satisfaction and autonomy-supportive teaching and a predictor of students’ future capacity to experience autonomy satisfaction and to recruit autonomy support. Twenty-two physical education (PE) teachers and their 1,422 Korean students (648 females, 773 males; 929 middle schoolers, 493 high schoolers) were randomly assigned to participate in an autonomy-supportive intervention program (ASIP), and we assessed their students’ autonomy satisfaction, autonomy dissatisfaction, agentic engagement, and agentic disengagement at the beginning, middle, and end of an academic year. By midyear, a multilevel structural equation modeling analysis showed that students of teachers who participated in the ASIP reported greater autonomy satisfaction and agentic engagement and lesser autonomy dissatisfaction and agentic disengagement and also that these gains in agentic engagement and declines in agentic disengagement then predicted those students who were able at year-end to self-generate autonomy need satisfaction and recruit teacher-provided autonomy support.


2015 ◽  
Vol 27 (4pt1) ◽  
pp. 1191-1204 ◽  
Author(s):  
Maayan Pratt ◽  
Magi Singer ◽  
Yaniv Kanat-Maymon ◽  
Ruth Feldman

AbstractHow infants shape their own development has puzzled developmentalists for decades. Recent models suggest that infant dispositions, particularly negative reactivity and regulation, affect outcome by determining the extent of parental effects. Here, we used a microanalytic experimental approach and proposed that infants with varying levels of negative reactivity will be differentially impacted by parent–infant synchrony in predicting physiological and behavioral regulation of increasing social stress during an experimental paradigm. One hundred and twenty-two mother–infant dyads (4–6 months) were observed in the face-to-face still face (SF) paradigm and randomly assigned to three experimental conditions: SF with touch, standard SF, and SF with arms’ restraint. Mother–infant synchrony and infant negative reactivity were observed at baseline, and three mechanisms of behavior regulation were microcoded; distress, disengagement, and social regulation. Respiratory sinus arrhythmia baseline, reactivity, and recovery were quantified. Structural equation modeling provided support for our hypothesis. For physiological regulation, infants high in negative reactivity receiving high mother–infant synchrony showed greater vagal withdrawal, which in turn predicted comparable levels of vagal recovery to that of nonreactive infants. In behavioral regulation, only infants low in negative reactivity who received high synchrony were able to regulate stress by employing social engagement cues during the SF phase. Distress was reduced only among calm infants to highly synchronous mothers, and disengagement was lowest among highly reactive infants experiencing high mother–infant synchrony. Findings chart two pathways by which synchrony may bolster regulation in infants of high and low reactivity. Among low reactive infants, synchrony builds a social repertoire for handling interpersonal stress, whereas in highly reactive infants, it constructs a platform for repeated reparation of momentary interactive “failures” and reduces the natural tendency of stressed infants to disengage from source of distress. Implications for the construction of synchrony-focused interventions targeting infants of varying dispositions are discussed.


2021 ◽  
pp. 026540752199644
Author(s):  
Jennifer Yurkiw ◽  
Matthew D. Johnson

This study investigated associations between perceived stress and sexual communication, considering supportive dyadic coping as a potential mediator and whether being male or female moderated associations. Data from 2,529 couples from Wave 5 of the German Family Panel (pairfam) were used in the analyses. Structural equation modeling results showed higher levels of stress were linked with lower levels of dyadic coping and higher levels of dyadic coping were associated with higher levels of sexual communication. There was no direct association between stress and sexual communication, but there was an indirect relationship between higher levels of perceived stress and less sexual communication via supportive dyadic coping. Sex did not moderate these associations. These results highlight supportive dyadic coping as an important protective factor against the effects of perceived stress on sexual communication and call for further investigation of how couples can maintain a healthy sex life in the face of stress.


Author(s):  
Waqar Ahmed ◽  
Arsalan Najmi ◽  
Farhana Khan ◽  
Hasan Aziz

Purpose Humanitarian services usually perform in the face of uncertainty in which mobilization of resources in an efficient and effective manner is a big challenge. Sharing timely and correct information among logistics partners and workers is a key to drive rapid response logistics effectively. The purpose of this paper is to understand how coordinated effort effects resources management (RM). Design/methodology/approach This study uses quantitative research methodology and collected data from 82 humanitarian workers dealing with logistical activities from a densely populated city of Pakistan. Data were then statistically analyzed through partial least squares–structural equation modeling. Findings The results suggest that the success of humanitarian supply network depends upon the level of trust among the partners, which accelerates commitment through strong coordination. Information sharing reduces behavioral uncertainty and enhances swift trust (ST). ST then helps to improve coordination and commitment from all stakeholders in order to manage resources to lead effective relief operations. Practical implications The study guides the practitioners and relief operations’ policy makers to lay emphasis on distributing right and timely information flow among the partners, which can lead to effective, efficient and swift humanitarian relief operations. Originality/value This study on RM during humanitarian logistics is well timed in the context of developing country with high uncertain events, improper infrastructure and very limited resources.


2020 ◽  
Vol 12 (22) ◽  
pp. 9718
Author(s):  
Fortuna Procentese ◽  
Vincenza Capone ◽  
Daniela Caso ◽  
Anna Donizzetti ◽  
Flora Gatti

In the face of emergency situations, such as a global pandemic, individuals rely on their personal resources, but also on community dimensions, to deal with the unprecedented changes and risks and to safeguard their well-being. The present study specifically addresses the role of individual resources and community dimensions with reference to academic communities facing COVID-19-related lockdowns and the changes that these have implied. An online questionnaire was administered to 1124 Italian University students. It detected their sense of belonging and of responsible togetherness with reference to their academic community through community dimensions, their student self-efficacy as an individual resource, and their academic stress—potentially stemming from studying in the middle of a pandemic. A multiple mediation model was been run with structural equation modeling. The results show that both the community dimensions associate with higher student self-efficacy and the sense of responsible togetherness, while also associating with lower academic stress. Moreover, student self-efficacy, in turn, associates with lower academic stress and mediates the relationships between both community dimensions and students’ academic stress levels. From these findings, the protective role that community dimensions can exert on an individual’s life becomes apparent. Building on this, further strategies should be implemented to reinforce personal and community resources in order to strengthen individuals against potentially stressful circumstances.


2021 ◽  
pp. 135910532110309
Author(s):  
Rachael N. Wright ◽  
Leonard Faul ◽  
John L. Graner ◽  
Gregory W. Stewart ◽  
Kevin S. LaBar

Pandemic health threats can cause considerable anxiety, but not all individuals react similarly. To understand the sources of this variability, we applied a theoretical model developed during the H1N1 pandemic of 2009 to quantify relationships among intolerance of uncertainty, stress appraisals, and coping style that predict anxiety about the COVID-19 pandemic. We surveyed 1579 U.S. Amazon Mechanical Turk workers in April 2020. Using structural equation modeling, we found that individuals who were more intolerant of uncertainty reported higher appraisals of threat, stress, and other-control, which predicted higher anxiety when emotion-focused coping was engaged, and lower anxiety when problem-focused coping was engaged. Political affiliation moderated these effects, such that conservatives relied more on self-control and other-control appraisals to mitigate anxiety than independents or liberals. These results show that how people appraise and cope with their stress interacts with political ideology to shape anxiety in the face of a global health threat.


2020 ◽  
Vol 41 (3) ◽  
pp. 239-256
Author(s):  
Bingyu Liu ◽  
Michael J. Platow

The current study examined the relationship between belief in a just world and self-reported academic resilience, and whether perceived academic competence mediated this relationship. Seven-hundred fifty-one students enrolled in a middle school and a high school (45.81% male, 15 to 16 years old) from two regions of China participated in this study. Structural equation modeling indicated that general belief in a just world was: (1) directly associated with academic resilience, and (2) indirectly associated with students’ academic resilience through perceived academic competence, after controlling for the effects of gender and socioeconomic status. This study provides insight into how broader social-ideological understandings of the world (e.g., belief in a just world) may guide individual self-construals (e.g., perceived academic competence) to affect individual persistence in the face of adversity (e.g., resilience). Implications and limitations of the current study are discussed.


2021 ◽  
Vol 38 (4) ◽  
pp. 1239-1246
Author(s):  
Pradnya PARAMITHA DEWI ◽  
◽  
Gunawan PRAYITNO ◽  
Dian DINANTI ◽  
◽  
...  

The purpose of this study is to analyze the factors and variables that have the most influence on the formation of social capital, analyze the relationship between variables, and describe the condition of community social capital in the face of the Covid-19 pandemic. There are three social capital variables used, including trust, social norms, and social networks. Confirmatory Factor Analysis (CFA), Structural Equation Modeling (SEM), and a literature review were used in this study. The CFA results show that community social capital is formed from 9 factors, where the most influential variable is the trust variable with a value of 0.81 or 66.3%. The results of the SEM analysis show that the relationship of social capital is described through the trust variable, which directly influences social networks and social norms, which will then also affect social networks. Based on the community's social capital and its willingness to collaborate in the fight against the Covid-19 pandemic, we can conclude that the programs developed by the community and the government to combat the Covid-19 outbreak will go off without a hitch.


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