Corrigendum: The influence of adolescents' internet adaptation on internet addiction: the mediating role of internet cultural adaptation.

[This corrects the article DOI: 10.3389/fpsyt.2023.1338343.].

The influence of adolescents' internet adaptation on internet addiction: the mediating role of internet cultural adaptation.

This study investigates how adolescents' internet adaptation influences internet addiction, with a particular focus on the mediating role of internet cultural adaptation. Grounded in cross-cultural adaptation theory, the study proposes that internet cultural adaptation can mitigate the negative relationship between internet adaptation and internet addiction. Conducting a large-scale random survey among Chinese adolescents, and employing standardized measures for internet addiction, internet cultural adaptation, and internet adaptation, the study finds a significant negative correlation between internet adaptation and internet addiction. More crucially, internet cultural adaptation plays a pivotal mediating role, such that when adolescents have higher capabilities in adapting culturally to the internet, the negative relationship between their internet adaptation and addiction is effectively alleviated. These findings not only provide a new perspective in understanding adolescent internet addiction but also offer theoretical guidance for devising preventive measures. The study also discusses practical applications of the results, emphasizing the importance of enhancing adolescents' internet cultural adaptation, and presents new strategies for preventing and mitigating issues of internet addiction.

[Distribution Characteristics and Influencing Factors of Phytoplankton Community in Harbin Urban River Network During Wet Season].

In this study, 23 typical sampling points were selected from the Harbin urban river network during the wet season from June to August in 2019, including the Harbin section of the Songhua, Hejiagou, Majiagou, and Ashi rivers to study the distribution of phytoplankton communities. Characteristics and driving factors influencing the water environment were determined, and a total of 174 taxa of phytoplankton were identified. During the wet period from June to August, the composition of the phytoplankton community in the urban river network of Harbin was dominated by Diatom and Chlorophyta, which gradually shifted toward Diatom and Cyanophyta. The dominant species mainly include:Cyclotella meneghiniana Kützing, Nitzschia palea (Kützing) W.Smith, Synedra ulna (Nitzsch) Ehrenberg, Ankistrodesmus angustus Bernard, Pseudanabaena limnetica (Lemmermann) Komárek, and Cryptomonas ovata Ehrenberg. One-way crossed similarity analysis (One-way crossed ANOSIM) revealed significant differences in phytoplankton composition among different sections of the river during the study period (P<0.05). The Harbin section of the Songhua River was richer in phytoplankton than other sections. Redundancy analysis (RDA) shows that TP and pH are the main environmental factors that cause differences in the structure of the phytoplankton community in each section of the Harbin urban river network. This research aims to enrich the research on the ecological evaluation of urban river network by studying the phytoplankton community and environmental relevance of Harbin urban river network and provide a theoretical basis for future urban river network ecological monitoring, management, and restoration.

Forest type and height are important in shaping the altitudinal change of radial growth response to climate change.

Tree radial growth is widely found to respond differently to climate change across altitudinal gradients, but the relative roles of biotic factors (e.g. forest type, height and density) vs. climate gradient remain unclear. We sampled tree rings from 15 plots along a large altitudinal gradient in northeast China, and examined how climate gradient, forest type, height, tree size and density affect: (1) temporal growth variability [mean sensitivity (MS) and standard deviation (SD) of the chronologies], and (2) the relationship of ring width indices (RWI) with historical climate. We used BIC based model selection and variable importance to explore the major drivers of their altitudinal patterns. The results showed that: both growth variability and RWI-climate relationships changed significantly with altitude. Forest height was the most important predictor for altitudinal changes of MS and SD. For RWI-climate relationships, forest type was more important than climate gradient, while height and stem density were weak but necessary predictors. We showed that the altitudinal difference in growth response to climate change cannot be explained by climate gradient alone, and highlight the necessity to examine the influence of biotic factors (which covary with climate across geographic gradient) to better understand forest response to climate change.

Effects of biophysical constraints, climate and phylogeny on forest shrub allometries along an altitudinal gradient in Northeast China.

Whether there is a general allometry law across plant species with different sizes and under different environment has long been controversial and shrubs are particularly useful to examine these questions. Here we sampled 939 individuals from 50 forest shrub species along a large altitudinal gradient. We tested several allometry models with four relationships simultaneously (between stem diameter, height, leaf, stem and aboveground biomass), including geometric, elastic and stress similarity, and metabolic scaling theory's predictions on small plants (MSTs) and trees (MSTt). We also tested if allometric exponents change markedly with climate and phylogeny. The predicted exponents of MSTt, elastic similarity and stress similarity (models for trees) were not supported by our data, while MSTs and geometric similarity gained more support, suggesting the finite size effect is more important for shrub allometries than being a woody plant. The influence of climate and phylogeny on allometric exponents were not significant or very weak, again suggesting strong biophysical constraints on shrub allometries. Our results reveal clear differences of shrub allometries from previous findings on trees (e.g. much weaker climatic and phylogenic control). Comparisons of herbs, shrubs and trees along a same climatic gradient are needed for better understanding of plant allometries.