Tianyou He

Coastal sandy ecosystems face compounded abiotic stresses, including nutrient-poor soils, strong winds, and salt spray, making vegetation restoration highly challenging. Plant functional traits are key indicators of adaptive strategies under environmental stress, yet systematic studies on leaf, twig, and root functional traits of bamboo stands under different silvicultural regimes in coastal sandy land remain scarce. This study examined six stand types on Dongshan Island, Fujian Province: monospecific stands of Bambusa oldhamii Munro, Phyllostachys nidularia f. farcata Wen, and Bambusa tuldoides ‘Swolleninternode’, and their corresponding mixed stands with Casuarina equisetifolia L. (bamboo-to-C. equisetifolia ratio 7:3). Eighteen morphological and structural indices spanning three organ categories, leaf morphology (leaf area, specific leaf area [SLA], leaf tissue density [LTD], etc.), twig structure (wood density, dry matter content, etc.), and root morphology (specific root length [SRL], specific root surface area [SRA], root tissue density [RTD], etc.), were measured and analysed using Pearson correlation and principal component analysis (PCA). Results: (1) Coefficients of variation (CV) for leaf and twig traits ranged from 11.29% to 74.61%; leaf area (CV = 74.61%) and twig wood density (CV = 71.91%) were most variable, indicating high phenotypic plasticity of bamboo in coastal sandy environments. (2) Twig wood density in monospecific stands of B. oldhamii (0.346 g cm⁻³) was significantly higher than in all other stands (p < 0.05), reflecting a conservative water-transport strategy; mixed stands of B. oldhamii had significantly higher SRL and SRA than other stands (p < 0.05), indicating stronger root resource-acquisition capacity. (3) PCA revealed that leaf area, leaf volume, SLA, LTD, SRL, average root diameter, total root volume, total root surface area, and twig wood density (TWD) were the key traits distinguishing stands under different silvicultural regimes; monospecific stands scored higher overall than mixed stands, reflecting superior leaf, twig, and root functional coordination. Different silvicultural regimes significantly shape the functional adaptive strategies of bamboo in coastal sandy land. Bamboo plants integrate leaf, twig, and root traits in a coordinated, resource-conservative manner to withstand coastal stresses. These findings provide a theoretical basis for bamboo species selection and mixed-stand configuration in coastal shelterbelt management.

Bamboo forest density is a factor that critically impacts the growth of moso bamboo, soil quality, and productivity. In this study, four bamboo forest density treatment groups were established under a long-term bamboo-stocking retention model, namely 1200 ± 100, 1800 ± 100, 2400 ± 100, and 3000 ± 100 plants·hm⁻², while a traditional management model focused on selective logging, with a bamboo forest density of 2100 ± 100 plants·hm⁻² (CK), serving as the control group. The study aimed to investigate the impact of bamboo forest density on bamboo shoots, roots, and soil, identify key influencing factors, and determine the optimal management density for this management model. Under the novel management model, bamboo shoot yield and number exhibited a unimodal response to stand density. At a density of 2400 plants·hm⁻², the bamboo shoot yield reached its highest value of 18,822 kg·hm⁻², with 7080 shoots·hm⁻². Under the density of 2400 plants·hm⁻², the specific root length, specific root surface area and total nitrogen, phosphorus and potassium contents of 0–1 mm fine roots were higher, and the contents of soil organic matter, total nitrogen, available phosphorus and available potassium were also better. Correlation analysis showed that the bamboo shoot yield and the number of shoots were closely related to soil quality (water content, organic matter, total nitrogen, available phosphorus and available potassium), and the effect of root total nitrogen content on shoot yield was particularly significant (the explanation rate was 75.7%). The comprehensive growth status assessment (D3 > D4 > D2 > CK > D1) showed that there were differences in the performance of different density treatment groups. This information could help bamboo farmers improve yield while protecting soil quality.

As one of the main bamboo species in coastal sandy land protection forests, Bambusa tuldoides ‘Swolleninternode’ can effectively improve the structure of forest tree species, increase the diversity of tree species and enhance the protection efficiency. However, research on the cultivation and utilization of B. tuldoides is still relatively scarce. Therefore, in this study, B. tuldoides was used as the research object. By applying biochar and nitrogen fertilizer, the effects of different biochar and nitrogen fertilizer ratios on the physiology and soil characteristics of bamboo were analyzed, and the optimal ratio scheme was identified. The results showed that the ratio of the T5 (A2B2C3) treatment had the best effect on the total chlorophyll, non-structural carbohydrate and nutrient contents of B. tuldoides leaves, and the contents under treatments was generally higher than under the control, CK. The activities of soil invertase, nitrate reductase and nitrite reductase were significantly increased under biochar treatment, and the effects of the T5 treatment were the best. The results of principal component analysis showed that the absolute values of the coefficient of leaf potassium, phosphorus content and soil total nitrogen were larger and more important, and the comprehensive evaluation of the T5 treatment was the highest.

As a carrier of cultural characteristics of historic districts, the soundscape has unique advantages in shaping regional cultural personality, and mastering its spatiotemporal characteristics is crucial for preserving soundscape heritage with natural and humanistic environments as its kernel. Focusing on the Three Square and Seven Alleys historic and cultural district in Fuzhou, this paper analyzes the spatial and temporal patterns of the physical acoustic indicators of the soundscape, the spatial dependence of the sound source harmony, and the spatial relationship between the two. It was found that the physical acoustic indicators showed dynamic changes in spatial and temporal scales and reflect specific human activity and behavioral patterns; sound source harmony showed spatial autocorrelation in both global and local models, with prominent spatial characteristics; and the physical acoustic indicators may negatively affect soundscape perception. The study emphasizes the importance of the regional cultural connotation of soundscape in urban planning. It provides a scientific basis for the planning, designing, and managing of soundscape resources in historic and cultural districts and world heritage sites.

Exploring the combined effects of multisensory interactions in open spaces can help improve the comfort of campus environments. Nine typical spaces on a university campus in Fuzhou were selected for this study. Subjects perceived the environment and then completed an on-site subjective questionnaire. At the same time, meteorological data (global radiation, air temperature, globe temperature, wind speed, relative humidity, and illumination intensity) were measured to determine the interactions between visual and acoustic and thermal perceptions. Differences in the meteorological parameters between the measuring points were described using a one-way ANOVA and Tukey’s post hoc test, and a chi-square test of independence was used to determine significant associations between thermal, acoustic, and visual comfort, which in turn led to the study of interactions between visual, acoustic, and thermal comfort using a two-way ANOVA. The following conclusions were drawn: (1) the Thermal Comfort Vote (TCV) increased with the increasing Acoustic Comfort Vote (ACV) at all levels of thermal stress. (2) The highest and lowest Acoustic Sensation Vote (ASV) values for each sound type were derived from either “slightly cold” or “warm” conditions. Both the Thermal Comfort Vote (TCV) and the Acoustic Comfort Vote (ACV) were positively correlated. (3) When “neutral”, the Thermal Sensation Vote (TSV) increased with increasing illumination intensity (LUX). (4) The Sunlight Sensation Vote (SSV) increased with the increasing Universal Thermal Climate Index (UTCI) when illumination intensity (LUX) was moderate and bright. (5) The highest and lowest Acoustic Sensation Vote (ASV) values for each sound type came from either “slightly cold” or “warm” conditions.

The acoustic landscape directly affects people’s perceptual experience, which is crucial to enhancing urban greenways’ visibility experience. This study analyzed data from three typical urban greenways in Fuzhou City. By classifying and combining the landscape space into two levels of “enclosure–coverage”, the space was categorized into six types: covered, uncovered, open, semi-open, semi-enclosed, and enclosure space. We explored the characteristics of soundscape perception and the factors affecting the evaluation of soundscape perception in different landscape spaces. The results showed that differences in sound sources between day and night led to differences in the soundscape of different spatial types. The sound pressure level decreased with an increasing degree of enclosure and coverage. The evaluation scores of sound source perception and soundscape perception were significantly different in different degrees of spatial enclosure and coverage, where the open space and covered space were the most sensitive to sound, and the open space played a positive role in enhancing the harmony of the artificial sound. Pleasantness and richness were the main factors influencing overall perception, contributing 50% and 17%, respectively. Visitors’ age, residence type, and visit frequency were the main factors affecting the evaluation of soundscape perception. The conclusions provide a reference and data for improving urban greenways’ soundscape quality.

This study aims to explore the influence of spatial functional differences on the overall relationship between soundscape and visual landscape in the context of historical blocks and then propose design guidelines for audiovisual elements. Audiovisual stimulus materials were collected from 11 representative locations in typical urban historical blocks along the southeast coast of China and classified into residential, cultural leisure, and commercial spaces based on their primary function, activity, and visual environment characteristics. An evaluation environment was created in the laboratory using virtual reality technology, and a subjective evaluation questionnaire was administered to 71 volunteers regarding the perception of audiovisual elements and the evaluation of the overall environment. Structural equation modeling was used to elucidate the relationships between sound source perception, soundscape perception, visual landscape satisfaction, and overall harmony of the environment and to compare the effects of functional differences at different locations on the overall relationships. The results show significant differences in the types of perceived sound sources at different functional locations, which makes the sound sources affecting soundscape perception and visual landscape satisfaction different. Residential space is mainly affected by artificial sound and mechanical noise; in cultural and leisure spaces, all three types of sound sources have a significant impact, and only natural sound has enhanced subjective perception; the impact of artificial sound in commercial space is crucial. In addition, visual landscape satisfaction should be prioritized over soundscape pleasure to enhance the overall harmony of the environment. In residential and commercial spaces, reducing artificial and mechanical noise can effectively enhance the harmony of the environment; in cultural and leisure areas, reducing artificial sounds and increasing natural sounds or historical landscape elements can enhance the overall harmony of the environment. The results of this paper provide empirical evidence for understanding the overall relationship between soundscape factors in urban contexts and suggest that place function should be considered an important context when designing soundscapes.

Bambusa albolineata (local name: Hua Zhu) is found in Zhejiang, Jiangxi, Fujian, Taiwan, and Guangdong provinces of China, and is often cultivated on low hills, flatlands, and along streams and rivers. Due to its long internodes and flexible material, it is used as timber wood in China. In the current research, the complete chloroplast (CP) genome of B. albolineata was sequenced and reported for the first time. The complete CP genome sequence was 139,326 bp, including a large single-copy (LSC) region of 82,862 bp, a small single-copy (SSC) region of 12,870 bp, and a pair of invert repeats (IR) regions of 21,798 bp. Besides, the plastid genome consisted of 129 genes; having 82 protein-coding genes, 39 tRNA genes, and eight rRNA genes. The overall GC content of the genome was 44.2%. The phylogenetic analysis based on the complete chloroplast genome indicates that B. albolineata is strongly related to B. flexuosa and B. boniopsis.

This study evaluated the effects of different light spectra (white light; WL, blue light; BL and red light; RL) on the root morphological traits and metabolites accumulation and biosynthesis in Sarcandra glabra. We performed transcriptomic and metabolomic profiling by RNA-seq and ultra-performance liquid chromatography−electrospray ionization−tandem mass spectrometry (UPLC-ESI-MS/MS), respectively. When morphological features were compared to WL, BL substantially increased under-ground fresh weight, root length, root surface area, and root volume, while RL inhibited these indices. A total of 433 metabolites were identified, of which 40, 18, and 68 compounds differentially accumulated in roots under WL (WG) vs. roots under BL (BG), WG vs. roots under RL (RG), and RG vs. BG, respectively. In addition, the contents of sinapyl alcohol, sinapic acid, fraxetin, and 6-methylcoumarin decreased significantly in BG and RG. In contrast, chlorogenic acid, rosmarinyl glucoside, quercitrin and quercetin were increased considerably in BG. Furthermore, the contents of eight terpenoids compounds significantly reduced in BG. Following transcriptomic profiling, several key genes related to biosynthesis of phenylpropanoid-derived and terpenoids metabolites were differentially expressed, such as caffeic acid 3-O-methyltransferase) (COMT), hydroxycinnamoyl-CoA shikimate hydroxycinnamoyl transferase (HCT), O-methyltransferase (OMT), and 1-deoxy-D-xylulose-5-phosphate synthetase (DXS). In summary, our findings showed that BL was suitable for growth and accumulation of bioactive metabolites in root tissue of S. glabra. Exposure to a higher ratio of BL might have the potential to improve the production and quality of S. glabra seedlings, but this needs to be confirmed further.

Bambusa contracta L. C. Chia & H. L. Fung is widely distributed in the foothills of Guangxi province, China, and used as a raw material for the production of various bamboo weaving products. In the present work, the complete chloroplast genome sequence of B. contracta was characterized by Illumina pair-end sequencing. The chloroplast genome of B. contracta was 139,470 bp in total length, containing a large single-copy (LSC) region of 83,187 bp, a small single-copy (SSC) region of 12,897 bp, and two inverted repeats (IR) regions of 21,693 bp. The genome consisted of a total of 127 genes, with 83 protein-coding genes, 36 tRNA genes, and eight rRNA genes. Based on 14 chloroplast genomes, the phylogenetic analysis revealed that B. contracta is closely related to B. emeiensis in Bambusodae.