scholarly journals Early Starvation Contributes to the Adaptive Capacity of Corythucha marmorata (Uhler), an Emerging Pest in China

Biology ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 80
Author(s):  
Wei Zhou ◽  
Wenlong Chen

Food shortages severely reduce the prospects of insect survival in natural settings, including in the case of herbivorous insects. However, the early starvation experience of some insects has positive effects throughout their entire lifespan. It is important to discuss the effects of refeeding and host plants on the capacity of herbivorous insects to adapt to starvation and low temperatures, considering that starvation resistance is expected to show some degree of adaptive phenotypic plasticity. We tested the relationship between host plant, starvation, and the supercooling capacity of the invasive pest Corythucha marmorata. In particular, we highlighted how early starvation affects the refeeding and recovery phases. Among the various range of hosts, the chrysanthemum lace bug has the fastest growth rate on Helianthus annuus, and the strongest supercooling capacity on Symphyotrichum novi-belgii. Especially, starvation for 2 days increases the rates of survival, development, and number of eggs upon refeeding, in comparison to no starvation. A 3-day starvation period in the nymphal stage significantly increased the supercooling capacity of 5th instar nymphs and adults, as observed in our study.

2021 ◽  
Vol 13 (15) ◽  
pp. 8123
Author(s):  
Delei Yang ◽  
Jun Zhu ◽  
Qingbin Cui ◽  
Qinghua He ◽  
Xian Zheng

Megaproject citizenship behavior (MCB) has been confirmed to a play vital role on megaproject performance. Although current research has argued that institution elements have had an impact on MCB diffusion, limited studies have empirically investigated the distinct effectiveness of various institution elements on driving MCB’s widespread diffusion in construction megaprojects. Based on institution theory, this study proposes a theoretical model comprising institutional elements (i.e., normative and mimetic isomorphism), owner’s support, relationship-based trust, and their effect or impact on MCB’s diffusion. Based on 171 industrial questionnaires collected from managers of contractors and designers in megaprojects. Partial least squares structural equation modeling (PLS-SEM) was used to validate the established model. The results indicated that both normative and mimetic isomorphism have positive effects on facilitating MCB diffusion, and owner’s support has shown partial mediation in promoting MCB diffusion through normative isomorphism, as well as full mediation in the promoting of MCB diffusion through mimetic isomorphism. Meanwhile, relationship-based trust exerts a positive moderating effect on the relationship between mimetic isomorphism and MCB. This study extends current literature on driving MCB diffusion from the perspective of institutional theory, contributing by providing four implications for megaprojects managers to “buy in” more extensive MCB.


2006 ◽  
Vol 25 (4) ◽  
pp. 227-236
Author(s):  
Li-Fen Liao

Sharing knowledge and firm innovation are the crucial ways to sustain competitive advantage. This study builds a nested model to test the relationship between learning organization, knowledge-sharing behavior, and firm innovation. Data gathered from 254 employees were used to examine the relationship of the learning organization to employees' knowledge-sharing behavior and firm innovation. The results indicate that open-mindedness, shared vision and trust have positive effects on both knowledge-sharing behavior and firm innovation. While commitment to learning does not shows significant relationship on knowledge-sharing behavior and firm innovation. Communication has significance on firm innovation but not significance on knowledge-sharing behavior.


Author(s):  
Robin Björkas ◽  
Mariah Larsson

AbstractSex dolls are a complex phenomenon with several diverse possible emotional, sexual and therapeutic uses. They can be part of a broad variety of sexual practices, and also function as a sexual aid. However, the media discourse on sex dolls first and foremost concerns how we perceive the relationship between intimacy and technology. A critical discourse analysis of the Swedish media discourse on sex dolls reveals six themes which dominate the discourse: (a) the definition of what a human being is; (b) a discourse on the (technological and existential) future; (c) a social effort; (d) a loveless phenomenon; (e) men’s violence against women; and (f) pedophilia. Accordingly, this discourse is very conservative and normative in its view of sexuality, technology, and humanity. Overall, the dominant themes do not provide any space for positive effects of technology on human sexuality, and if they do, it is usually as a substitute for something else.


2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Yuling Sun ◽  
Zehua Liu ◽  
Hui Yang

Although many studies have suggested that the relationship between different supply chain members significantly affects agricultural product quality, suppliers’ perceptions of fairness, which greatly influence their decisions on building the relationship quality, are often overlooked. Particularly, the empirical evidence to investigate the impacts of suppliers’ fairness on the relationship quality and the factors that affect the suppliers’ fairness is missing, and therefore this knowledge gap needs to be filled by new research. Herein, we conducted a survey of 450 agricultural product suppliers and systemically analyzed the impact of antecedents on fairness perception and the impact of fairness perception on relationship quality. In addition, we developed a structural equation model and found that information sharing and price satisfaction had significantly positive effects on procedural fairness and distributive fairness, respectively. Furthermore, our studies demonstrated that procedural fairness is more important in improving the relationship quality than distributive fairness. However, supplier dependence is another important impact factor, and it greatly decreases the positive effects of suppliers’ fairness on relationship quality. In summary, the study results provide several managerial implications and extend our understanding of the importance of suppliers’ fairness in the relationship quality, which involves product development with respect to the supplier’s performance.


2015 ◽  
Vol 115 (1) ◽  
pp. 88-106 ◽  
Author(s):  
Shuchih Ernest Chang ◽  
Anne Yenching Liu ◽  
Sungmin Lin

Purpose – The purpose of this paper is to evaluate privacy boundaries and explores employees’ reactions in employee monitoring. Design/methodology/approach – The research used the metaphor of boundary turbulence in the Communication Privacy Management (CPM) theory to demonstrate the psychological effect on employees. The model comprised organizational culture, CPM, trust, and employee performance in employee monitoring to further investigated the influence exerted by organizational culture and how employees viewed their trust within the organization when implementing employee monitoring. Variables were measured empirically by administrating questionnaires to full-time employees in organizations that currently practice employee monitoring. Findings – The findings showed that a control-oriented organizational culture raised communication privacy turbulence in CPM. The communication privacy turbulence in CPM mostly had negative effects on trust in employee monitoring policy, but not on trust in employee monitoring members. Both trust in employee monitoring policy and trust in employee monitoring members had positive effects on employee commitment and compliance to employee monitoring. Research limitations/implications – This research applied the CPM theory in workplace privacy to explore the relationship between employees’ privacy and trust. The results provide insights of why employees feel psychological resistance when they are forced to accept the practice of employee monitoring. In addition, this study explored the relationship between CPM and trust, and offer support and verification to prior studies. Practical implications – For practitioners, the findings help organizations to improve the performance of their employees and to design a more effective environment for employee monitoring. Originality/value – A research model was proposed to study the impacts of CPM on employee monitoring, after a broad survey on related researches. The validated model and its corresponding study results can be referenced by organization managers and decision makers to make favorable tactics for achieving their goals of implementing employee monitoring.


2018 ◽  
Vol 21 (3) ◽  
pp. 423-442 ◽  
Author(s):  
Arménio Rego ◽  
Miguel Pina e Cunha ◽  
Dálcio Reis Júnior ◽  
Cátia Anastácio ◽  
Moriel Savagnago

Purpose The purpose of this paper is to study if the employees’ optimism-pessimism ratio predicts their creativity. Design/methodology/approach In total, 134 employees reported their optimism and pessimism, and the respective supervisors described the employees’ creativity. Findings The relationship between the optimism-pessimism ratio and creativity is curvilinear (inverted U-shaped); beyond a certain level of the optimism-pessimism ratio, the positive relationship between the ratio and creativity weakens, suggesting that the possible positive effects of (high) optimism may be weakened by a very low level of pessimism. Research limitations/implications Being cross-sectional, the study examines neither the causal links between the optimism-pessimism ratio and creativity nor other plausible causal links. The study was carried out at a single moment and did not capture the dynamics that occur over the course of time involving changes in optimism/pessimism and creativity. Future studies may adopt longitudinal or quasi-experimental designs. Practical implications Managers and organizations must consider that, even though positivity promotes creativity, some level of negativity may help positivity to produce creativity. Originality/value This study suggests that scholars who want to study the antecedents of creativity (and innovation) must be cautious in focusing only on the positive or the negative sides of individuals’ characteristics, and rather they must explore the interplay between both poles. Individuals may experience both positive and negative states/traits (Smith et al., 2016), and this both/and approach may impel them to think divergently, to challenge the status quo and to propose “out the box” and useful ideas.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mario Raposo ◽  
Cristina I. Fernandes ◽  
Pedro M. Veiga

PurposeResearch into the relationship between entrepreneurial ecosystems and sustainability has deepened in terms of both quantity and quality even while still remaining a fragmented and divergent field. Hence, the purpose of this study is to put forward empirical evidence to advance the literature on the relationship between entrepreneurial ecosystems and sustainability. To this end, the authors furthermore identify and highlight a future research agenda.Design/methodology/approachThe source of the empirical analysis in this article stems from the Community Innovation Survey, the leading statistical inquiry of innovation in companies carried out by Eurostat based upon the conceptual framework set out in the Oslo Manual. For modelling the variables, the authors applied binary regression based on logistic distribution.FindingsThe results of the research demonstrated how all of the variables considered for entrepreneurial ecosystems (co-operation with suppliers, co-operation with clients or customers, co-operation with universities; co-operation with government, public or private research institutes) return positive impacts on national sustainabilityResearch limitations/implicationsDespite the data spanning only the nine countries in the database, the results enable insights into the theory as the results serve to strengthen already existing considerations on the positive effects of entrepreneurial ecosystems for the sustainability of countries.Practical implicationsThe results of the research may generate important implications for company policy formulation. The identification of the relevance of the different actors in entrepreneurial ecosystems and their impact on sustainability may assist firms and policymakers to identify the leading actors and the resources necessary to sustaining their activities and thereby correspondingly establishing their priorities.Originality/valueThe research (1) both deepens the prevailing knowledge on this theme and fills a gap encountered in the existing literature; (2) in practical terms, for managers, entrepreneurs and politicians to better grasp how entrepreneurship constitutes a systemic phenomenon and these systems require approaching in terms of their impacts and greater contributions to obtaining sustainability.


2018 ◽  
Vol 19 (12) ◽  
pp. 3955 ◽  
Author(s):  
Jianqiang Huo ◽  
Dengjing Huang ◽  
Jing Zhang ◽  
Hua Fang ◽  
Bo Wang ◽  
...  

Our previous studies suggested that both hydrogen gas (H2) and nitric oxide (NO) could enhance the postharvest freshness of cut flowers. However, the crosstalk of H2 and NO during that process is unknown. Here, cut lilies (Lilium “Manissa”) were used to investigate the relationship between H2 and NO and to identify differentially accumulated proteins during postharvest freshness. The results revealed that 1% hydrogen-rich water (HRW) and 150 μM sodium nitroprusside (SNP) significantly extended the vase life and quality, while NO inhibitors suppressed the positive effects of HRW. Proteomics analysis found 50 differentially accumulated proteins in lilies leaves which were classified into seven functional categories. Among them, ATP synthase CF1 alpha subunit (chloroplast) (AtpA) was up-regulated by HRW and down-regulated by NO inhibitor. The expression level of LlatpA gene was consistent with the result of proteomics analysis. The positive effect of HRW and SNP on ATP synthase activity was inhibited by NO inhibitor. Meanwhile, the physiological-level analysis of chlorophyll fluorescence and photosynthetic parameters also agreed with the expression of AtpA regulated by HRW and SNP. Altogether, our results suggested that NO might be involved in H2-improved freshness of cut lilies, and AtpA protein may play important roles during that process.


2018 ◽  
Vol 29 (6) ◽  
pp. 833-845
Author(s):  
Briege Casey ◽  
Margaret Webb

The relationship between processes of mental health recovery and lifelong learning is an area of increasing international interest. Experiences of transformation, positive effects on self-esteem, self-insight, and empowerment have been identified regarding both endeavors. Recognition of these benefits has stimulated collaborative development of educational programs in personal development, self-efficacy, and recovery principles. The importance of evaluating this educational provision has been emphasized; however, there has been little detailed exploration of students’ experiences and perceptions of recovery and learning in the context of recovery education programs. In this article, we present a participatory arts-based inquiry with 14 women, including mental health service users, who undertook a recovery training program to support their roles as mental health support workers in Ireland. Participatory visual analysis revealed three recurring themes; the interrelatedness of learning and recovery journeys, knowledge as a source of stability and rescue and the need for resilience in learning and recovery.


2020 ◽  
Vol 218 ◽  
pp. 04014
Author(s):  
Yixing Jin ◽  
Peiying Wu ◽  
Cheng Lin ◽  
Yingda Wang

This study investigated the impact of emotional leadership of leaders on organizational commitment of hotel employees, as well as the mediating role of job satisfaction. The results indicate that: (1) Emotional leadership and job satisfaction have positive effects on organizational commitment. (2) Emotional leadership has a positive effect on job satisfaction. (3) Job satisfaction plays a mediating role between emotional leadership and organizational commitment.


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