Browsing by Author "Wen, Jun"
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- Impacts of COVID-19 on changing patterns of household food consumption: an intercultural study of three countriesPublication . Kartari, Asker; Özen, Asli Emine; Correia, Antónia; Wen, Jun; Kozak, MetinIn light of COVID-19’s effects on individuals’ social, economic, political, and psychological values, this paper aims to investigate the pandemic’s role in possible changes to people’s food consumption and meal habits in three countries, namely China, Portugal, and Turkey. The sample includes individuals from the three countries, exploratory factor analysis and non-parametric tests were used to test the differences. Results suggest that coronavirus has played a strong part in altering households’ food consumption and meal habits within these countries. The pandemic has particularly led to greater consumption of fresh fruits and vegetables and spending more time eating meals at home. Portugal appears to be consuming more seafood, bread, and butter whereas China features higher consumption of rice and meat products; Turkey is consuming more meat and eggs. The study closes with a set of recommendations for the society and future research.
- Integrated phylogenomic analyses unveil reticulate evolution in Parthenocissus (Vitaceae), highlighting speciation dynamics in the Himalayan–Hengduan MountainsPublication . Yu, Jinren; Niu, Yanting; You, Yichen; J. Cox, Cymon; Barrett, Russell L.; Trias‐Blasi, Anna; Guo, Jing; Wen, Jun; Lu, Limin; Chen, ZhiduanHybridization caused by frequent environmental changes can lead both to species diversification (speciation) and to speciation reversal (despeciation), but the latter has rarely been demonstrated. Parthenocissus, a genus with its trifoliolate lineage in the Himalayan-Hengduan Mountains (HHM) region showing perplexing phylogenetic relationships, provides an opportunity for investigating speciation dynamics based on integrated evidence.We investigated phylogenetic discordance and reticulate evolution in Parthenocissus based on rigorous analyses of plastome and transcriptome data. We focused on reticulations in the trifoliolate lineage in the HHM region using a population-level genome resequencing dataset, incorporating evidence from morphology, distribution, and elevation.Comprehensive analyses confirmed multiple introgressions within Parthenocissus in a robust temporal-spatial framework. Around the HHM region, at least three hybridization hot spots were identified, one of which showed evidence of ongoing speciation reversal.We present a solid case study using an integrative methodological approach to investigate reticulate evolutionary history and its underlying mechanisms in plants. It demonstrates an example of speciation reversal through frequent hybridizations in the HHM region, which provides new perspectives on speciation dynamics in mountainous areas with strong topographic and environmental heterogeneity.
- Optimal data partitioning, multispecies coalescent and Bayesian concordance analyses resolve early divergences of the grape family (Vitaceae)Publication . Lu, Limin; Cox, C. J.; Mathews, Sarah; Wang, Wei; Wen, Jun; Chen, ZhiduanEvolutionary rate heterogeneity and rapid radiations are common phenomena in organismal evolution and represent major challenges for reconstructing deep-level phylogenies. Here we detected substantial conflicts in and among data sets as well as uncertainty concerning relationships among lineages of Vitaceae from individual gene trees, supernetworks and tree certainty values. Congruent deep-level relationships of Vitaceae were retrieved by comprehensive comparisons of results from optimal partitioning analyses, multispecies coalescent approaches and the Bayesian concordance method. We found that partitioning schemes selected by PartitionFinder were preferred over those by gene or by codon position, and the unpartitioned model usually performed the worst. For a data set with conflicting signals, however, the unpartitioned model outperformed models that included more partitions, demonstrating some limitations to the effectiveness of concatenation for these data. For a transcriptome data set, fast coalescent methods (STAR and MP-EST) and a Bayesian concordance approach yielded congruent topologies with trees from the concatenated analyses and previous studies. Our results highlight that well-resolved gene trees are critical for the effectiveness of coalescent-based methods. Future efforts to improve the accuracy of phylogenomic analyses should emphasize the development of newmethods that can accommodate multiple biological processes and tolerate missing data while remaining computationally tractable. (C) The Willi Hennig Society 2017.
- Positive effects of COVID-19 on food preparation and expenditure habits: a comparative study across three countriesPublication . Özen, Asli Emine; Kartarı, Asker; Correia, Antónia; Wen, Jun; Kozak, MetinObjective: This study seeks to empirically investigate how the changing eating habits affect health habits within three countries with entirely different cultures and diets to understand to what extent the pandemic may be responsible for these changes. Design: Specifically, a questionnaire was conducted in China, Portugal and Turkey in early 2021. A series of statistical analyses were performed to identify how changes in individuals' eating habits have influenced their diets, considering the pandemic context and the varying cultural contexts where this research was performed. Setting: A structured questionnaire form was developed and uploaded to an online platform with unique links for automatic distribution to respondents in each country. Data for the main survey were gathered between 3 January and 1 February 2021. Participants: Using snowball sampling, the authors leveraged their social networks by asking friends and colleagues to distribute the survey to potentially interested individuals. This distribution was stratified accordingly to the distribution of the population. The authors ultimately collected 319 useable surveys from China, 351 from Portugal and 449 from Turkey. Results: The pandemic inspired healthier food habits, mostly because people have additional time to cook, shop differently for food and spend more money on groceries. Conclusions: The study suggests that aside from cultural values and dietary habits, the available time and the fear of the pandemic most explained the new eating habits. Several implications are provided for researchers and overall society in these three countries.