This scientific paper examines the impact of climate change on the spread and survival of the invasive species Corythucha arcuata Say, 1832 (oak lace bug, or OLB) in Romania. The OLB is native to the Eastern USA and Canada, and in its native habitat, it coexists with minimal impact to the preferred host plant species Quercus. However, in Europe, the OLB in high density causes early defoliation, slowing tree growth. As Quercus spp. is a keystone species, the impact of the OLB on European forests is significant. This paper aims to address several gaps in knowledge about the OLB by presenting findings from a study conducted by the Lucian Blaga University of Sibiu (ULBS) in Romania. The study identified the species’ chronology of spread, ecology, ethology and biology of the species, in addition to foliage classification to determine the extent of attack. The study found a direct link between the temperature and the speed of the generational lifecycle. The findings support the thesis that climate change is enabling the healthy, rapid density growth of OLB, which is a danger to the Quercus spp. Further research is needed in the area of the thermal tolerance of the OLB, and the research conducted by the ULBS represents the first documented research into the thermal constant of the insect. The paper concludes that further research must be in the direction to understand how and where these insects survive during winter to find future management measures and identify chemical or biological methods as solutions to eradicate and stop the expansion of the invasion of the OLB, and the potential consequences for the Quercus sp.

This study presents an integrated analysis of climate-driven phenology and infestation dynamics of the invasive oak lace bug (Corythucha arcuata) in foothill oak ecosystems of Rășinari, Romania. Using reconstructed microclimatic data for 2024–2025, systematic field monitoring, degree-day (GDD) modeling, and the De Martonne aridity index, we assessed the combined effects of thermal accumulation and hydric stress on multigenerational development. Results indicate that warm springs and sustained summer temperatures enabled the completion of two full generations (G₁–G₂) in both years, while recurrent late-summer aridity intensified foliar vulnerability and accelerated nymphal development. A third generation (G₃) was initiated but remained incomplete due to declining autumn temperatures and photoperiod constraints. Strong habitat-specific differences were observed: exposed forest-edge stands exhibited the highest damage levels (up to 90%), whereas closed-canopy stands benefited from microclimatic buffering. The combined GDD–aridity framework showed close agreement with observed phenological transitions, providing a robust tool for identifying high-risk infestation periods. Climatic projections for 2026 suggest further advancement of generational timing under continued warming and increasing aridity. These findings highlight the growing climatic suitability of foothill oak ecosystems for C. arcuata and support the development of early-warning systems and adaptive strategies for sustainable oak forest management.

Working students face many challenges: they must balance work, school, extracurricular activities, and personal life. Several studies reflected the fact that this balancing act goes hand-in-hand with the level of stress. The scope of the study was to find out whether working students in the Faculty of Engineering Sibiu experience different levels of stress compared with the non-working students. Eighty students from the third year of studies were interviewed regarding the research topic. The interviewed students were randomly selected, five working and five non-working students from each of the eight faculty specializations. The results of the study reflect the fact that the management of the faculty and the professors themselves must take into consideration that stress is a factor that affects students’ performance and behavior.

The invasive expansion of the oak lace bug (Corythucha arcuata) represents a major threat to European oak forests, yet the synergistic roles of climatic stressors remain poorly understood. This study investigates the phenological plasticity and adaptive thermoregulation of C. arcuata in the specific microclimatic conditions of the Rășinari Forest District, Romania. Monitoring across an altitudinal gradient (525–825 m) identified a complex voltinism, characterized by a highly successful second generation (G₂) and a restricted third generation (G₃, <12% emergence due to early frosts). By utilizing a physiological time scale (GDD), we demonstrated that G₂ exhibits a 15% temporal compression in development duration compared to G₁. A critical tipping point for host vulnerability was identified at a De Martonne Aridity Index (I_Ar) value of 20. Below this threshold, oak trees underwent a linear physiological decline, with a 74.5% decrease in chlorophyll content and a 58.8% accumulation of soluble sugars. These findings support the metabolic bait hypothesis, where drought-stressed foliage becomes a high-quality nutritional resource. Furthermore, we established a critical thermal threshold of 32 °C, which triggers active vertical migration from the sun-exposed canopy to shaded interiors to avoid heat stress. Our results provide a predictive framework for sustainable forest management, identifying aridity as an injury amplifier that facilitates pest impacts under a warming climate.

Higher education is increasingly expected to cultivate the sustainability competences described by the European GreenComp framework, yet empirical evidence linking specific pedagogies to competence-specific change remains limited. This study examined whether participation in “Sibiu Impact Makers” (SIM), an interdisciplinary, Design Thinking-based challenge module, was associated with changes in students’ self-reported GreenComp sustainability competences and LifeComp transversal competences. Using a one-group pre-test/post-test design, 113 undergraduates at Lucian Blaga University of Sibiu (Romania) completed a 45-item questionnaire operationalising GreenComp and the complementary LifeComp framework at the beginning and end of the semester; responses were matched through anonymous identifiers. Composite scales showed good-to-excellent reliability (Cronbach’s α = 0.70–0.95). Overall GreenComp scores increased with a small effect (Wilcoxon z = −2.47, p = 0.014, dz = 0.21), with the clearest change in “embracing complexity”; critical evaluation of sustainability information and problem framing remained significant after multiplicity correction. LifeComp competences, already high at baseline, remained stable. Exploratory subgroup analyses did not detect statistically significant differences in change across gender, faculty, study year and employment. Because the study lacked a control or comparison group, the observed pre–post changes cannot be attributed causally to the module. The study contributes a competence-specific GreenComp evaluation of an existing interdisciplinary Design Thinking module, highlighting that, within this module, short-term changes were more evident in analytical than in value-oriented sustainability competences.

The purpose of the paper is to identify risks and challenges for alternative forms of work during online classes for teaching personnel. Musculoskeletal disorders (MSD) affect the body’s bones, muscles, joints, ligaments/tendons, and nerves. Musculoskeletal health risk in the educational sector should be taken into consideration to ensure the safety and healthy employees, especially when online classes require a physical inactivity and a prolonged sitting in front of the computer. MSD management requires an integrated approach integrating wellbeing with a focus on prevention, recognizing physical, social and emotional influences and early intervention. Workplace wellness has been a valuable tool and technique for maximizing employee health and workplace efficiency.