应用生态学报最新文献

{"title":"Response of non-structural carbohydrates in the roots of <i>Larix gmelinii</i> to climate warming and provenance variation.","authors":"Wen-Cong Zhu, Qiu-Lan Zhao, Ya-Long Liu, Xian-Kui Quan","doi":"10.13287/j.1001-9332.202608.043","DOIUrl":"10.13287/j.1001-9332.202608.043","url":null,"abstract":"<p><p>We employed a common garden experiment to simulate climate warming, based on which we investigated the responses of non-structural carbohydrates (NSC), soluble sugars (SS), starch (ST) concentrations and the SS/ST in fine, medium, and coarse roots of 11 provenances of <i>Larix gmelinii</i> at the end of the growing season. The results showed that climate warming significantly decreased NSC concentration, SS concentration and SS/ST by 8.0%-10.6%, 16.4%-24.5% and 25.3%-30.8%, respectively, across all root types. ST concentration in the fine and middle roots significantly increased by 9.9%-15.3%, and ST concentration in the coarse roots varied insignificantly. As root diameter increased, the decrease in SS concentration showed an increasing trend, while the increase in ST concentration showed a decreasing trend. The warming-induced changes in NSC concentration, SS concentration, and SS/ST across different root diameter classes after climate warming, namely the warming effect, were significantly and positively correlated with aridity index (AI) of the seed collection sites. In contrast, the warming effect on ST was significantly and negatively correlated with AI. <i>L. gmelinii</i> adapted to climate warming by regulating NSC concentration and the proportions of its components in roots of different diameter classes, and this capacity varied among provenances. The effects of root diameter class and provenance should be considered when investigating the responses of root NSC to climate warming.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2547-2555"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial correlation network characteristics and influencing factors of urban ecological vulnerability in the Yellow River Basin, China.","authors":"Hu-Jia Zhao, Heng-Heng Zhao, Peng Wang, Nan-Xuan Shang, Zhou Yang, Zi-Qi Zhao, Rong-Ping Li, Hui-Zheng Che","doi":"10.13287/j.1001-9332.202608.029","DOIUrl":"10.13287/j.1001-9332.202608.029","url":null,"abstract":"<p><p>As an important component of the atmosphere, aerosols significantly influence regional climate and environment through scattering and absorption of solar radiation. To reveal the spatiotemporal evolution patterns of aerosol optical properties in Liaoning Province, we analyzed the spatiotemporal distribution characteristics and evolution trends of aerosol optical depth (AOD) in Liaoning Province based on the reanalysis data of AOD from 1994 to 2023. The results showed that the annual average AOD from 1994 to 2023 in Liaoning Province exhibited a distribution pattern of higher values in the south and lower values in the north, with the southern and coastal areas being the high-value centers (average value 0.43), while that in the west and north were the lowest (0.30). From 1994 to 2012, the annual average AOD in Liaoning Province increased by 0.007, and it decreased by 0.011 from 2013 to 2023, confirming the critical role of national emission reduction policies in the long-term reduction of aerosols in the northeastern region. Due to the combined effects of spring dust weather, high-temperature and high-humidity conditions in summer, and the increase in aerosol hygroscopicity and boundary layer uplift the monthly scale AOD in Liaoning Province, which showed a single-peak distribution. From January to February, the AOD was at the lowest level of the year (0.20), reaching its peak in June (0.58), and returning to the low value area in winter from November to December. The summer aerosol load was about 2.9 times that of winter. The results could provide data support for consolidating the achievements of air quality improvement.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2765-2770"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial correlation network characteristics and influencing factors of urban ecological vulnerability in the Yellow River Basin, China.","authors":"Xin-Yu Qi, Chen Wang, Xiang-Ting Tian, Mo-Han Yan, Hao-Yuan Guo, Yuan Miao, Bing Zhang, Lin Qiu, Yan-Xiang Shan, Yue-Feng Li, Dong Wang","doi":"10.13287/j.1001-9332.202608.033","DOIUrl":"10.13287/j.1001-9332.202608.033","url":null,"abstract":"&lt;p&gt;&lt;p&gt;To elucidate the effects of fire on soil nematode community structure and energy flow within the soil micro-food web across different forest types in the subtropical-temperate transition zone, we investigated soil nematode communities in broadleaf forest, mixed coniferous-broadleaf forest, and coniferous forest in the Xianshan forest area near Henan Dabie Mountains National Forest Ecosystem Field Observation and Research Station. We analyzed soil nematode community structure and micro-food web energy flow between burned and unburned plots, and explored the key driving factors. The results showed that fire significantly reduced the average total soil nematode abundance and the relative abundance of omnivore-predator nematodes across the three forest types by 30.3% and 58.9%, respectively. Meanwhile, fire significantly decreased the soil nematode maturity index and channel index by 10.9% and 22.6%, respectively. There were no significant changes in the relative abundance of microbe-feeding nematodes, plant-parasitic nematodes, or diversity indices. For broadleaf forests, fire significantly increased the Shannon diversity index, richness index, and enrichment index of soil nematodes by 9.5%, 26.9%, and 44.5%, whereas the maturity index and channel index decreased by 19.5% and 41.3%, respectively. Post-fire soil organic matter decomposition was predominantly mediated by the bacterial channel, and no changes were found in total nematode abundance or the relative abundance of any trophic group. In mixed coniferous-broadleaf forests, fire significantly reduced the relative abundance of omnivore-predator nematodes by 61.9%, but did not affect the relative abundance of microbe-feeding nematodes, plant-parasitic nematodes, or ecological indices. For coniferous forests, fire did not alter total nematode abundance, the relative abundance of any trophic group, or ecological indices. Nematode faunal analysis showed that fire increased the functional metabolic footprint of soil nematodes in broadleaf forests, but reduced that in mixed coniferous-broadleaf and coniferous forests. Fire resulted in more uniform energy flow distribution among different energy channels in the micro-food web of mixed coniferous-broadleaf forests. In contrast, energy flow through organic matter decomposition channels and predation channels in the micro-food web was inhi-bited in broadleaf and coniferous forests, with energy concentrated in the plant-parasitic channel and energy flow uniformity decreasing. Litter quality, soil available nitrogen content, and soil water content were the key environmental factors affecting soil nematode community composition. In conclusion, soil nematode communities in different forest types exhibited divergent responses to fire. Broadleaf forests showed stronger potential for biodiversity recovery and nutrient enrichment, mixed forests had improved energy flow uniformity in the micro-food web, and coniferous forests exhibited characteristics of fu","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2793-2802"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Driving mechanisms and predictive modeling of lightning-caused fires in the Greater Khingan Mountains, China.","authors":"Xiao-Rui Tian, Feng-Qian Chen, Xue-Zheng Zong, Feng-Jun Zhao, Si-Wei Li, Xing-Yue Deng","doi":"10.13287/j.1001-9332.202608.010","DOIUrl":"10.13287/j.1001-9332.202608.010","url":null,"abstract":"<p><p>To identify the major drivers of lightning-caused fire and to develop predictive models in the Greater Khingan Mountains, we integrated multi-source data from 2021 to 2024, including lightning records, forest fire records, and multi-source environmental data. We identified candidate lightning events using a spatiotemporal mat-ching approach, and addressed the imbalance problem of sample type using the EasyEnsemble method to construct the model dataset. We then selected predictor variables through correlation analysis, collinearity diagnosis, and feature importance analysis, developed multiple statistical and machine learning models, and interpreted the final model by SHAP (SHapley Additive exPlanations). The results showed that a total of 103 lightning events associated with lightning-caused fires were identified. The average distance between lightning strikes and fire ignition points was 0.84 km, with a mean holdover time of 1.4 days. 83.5% of fires were detected within three days after lightning occurrence. The predictive model identified the duff moisture code, drought code, and hourly fire weather index as the primary predictors, with temperature and wind speed as the secondary predictors. The random forest model showed the best overall performance, with an AUC of 0.7959, sensitivity of 0.7229, and specificity of 0.7752. The optimal classification thresholds were mainly concentrated between 0.45 and 0.55. The occurrence of lightning-caused fire was jointly influenced by fire weather, meteorological, topographic, and lightning-related factors, exhibiting significant nonlinear and threshold effects.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2693-2703"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148813879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composition and assembly processes of rhizosphere bacterial communities of arbuscular mycorrhizal and ectomycorrhizal tree species.","authors":"Guang-Zhen Xiang, Li-Ming Yin, Peng Wang, Yang-Hui He, Xu-Hui Zhou","doi":"10.13287/j.1001-9332.202608.046","DOIUrl":"10.13287/j.1001-9332.202608.046","url":null,"abstract":"<p><p>How the mycorrhizal type of tree species regulates the composition and assembly processes of rhizosphere bacterial communities remains unclear. We selected five arbuscular mycorrhizal (AM) and five ectomycorrhizal (EcM) tree species from two typical forests across different climatic zones, namely a subtropical evergreen broadleaved forest at Tiantong Station in Zhejiang and a temperate broadleaved Korean pine forest at Maoershan Station in Heilongjiang. We analyzed the rhizosphere soil physicochemical properties and bacterial community composition, and quantified the assembly processes of bacterial communities by using niche breadth and null model analyses. The results showed that forest type was the dominant factor driving variation in rhizosphere soil bacterial communities (explaining rate 62.6%), with a small contribution from mycorrhizal type (2.6%). However, mycorrhizal effects differed significantly among forest types and bacterial abundance levels, including all species, abundant species, and rare species. Soil nitrogen availability, especially ammonium, was a key factor regulating the structure of rhizosphere bacterial communities. The standardized effect size (SES) values of rhizosphere bacterial communities in both forests were all greater than 2, indicating that deterministic processes dominated the assembly of these communities. The influence of mycorrhizal type on the assembly processes of rhizosphere bacterial communities exhibited significant forest-type dependence. At Tiantong Station, deterministic processes had a stronger influence on AM tree species, whereas at Maoershan Station, this influence was stronger for EcM tree species. This study revealed the dominant role of deterministic processes in the assembly of rhizosphere bacterial communities of mycorrhizal tree species, and this role was dually regulated by forest type and mycorrhizal type.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2637-2646"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148813934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of long-term nitrogen deposition on soil microbial respiration and metabolic quotient in subtropical natural forests.","authors":"Xiao-Die Hu, Xiao-Hong Wang, Hong Gao, Wei Zhang, Bing-Bin Huang, Xiao-Dong Yao, Guang-Shui Chen","doi":"10.13287/j.1001-9332.202608.006","DOIUrl":"10.13287/j.1001-9332.202608.006","url":null,"abstract":"<p><p>Based on a 9-year nitrogen (N) addition experiment in a subtropical evergreen broad-leaved forest at the Fujian Sanming Forest Ecosystem National Field Observation and Research Station, we examined the effects of long-term N addition on soil microbial respiration and metabolic quotient (<i>q</i>CO₂). We collected surface soils (0-10 cm) from control (CK, 0 kg N·hm^-2·a^-1), low nitrogen (LN, 40 kg N·hm^-2·a^-1), and high nitrogen (HN, 80 kg N·hm^-2·a^-1) treatments, analyzed soil physicochemical properties, microbial biomass, and the stoichiometric characteristics of extracellular enzymes related to carbon (C), N, and phosphorus (P), and measured the soil microbial respiration through laboratory incubation experiments. The results showed that the HN treatment significantly decreased the soil C/N by 18.8% and increased the soil N/P by 52.9%. The LN and HN treatments significantly decreased the dissolved organic C/N by 31.8% and 34.6%, and increased the microbial N/P by 72.8% and 29.8%, respectively. Microbial respiration in the LN treatment was significantly higher than that in the HN treatment, with no differences observed between either treatment and CK. The <i>q</i>CO₂ in the LN and HN treatments was significantly increased by 36.8% and 21.1%, respectively, and the <i>q</i>CO₂ in the LN treatment was significantly higher than that in the HN treatment. Stepwise regression analysis indicated that soil C/N and microbial N/P were the primary factors influencing the microbial respiration and <i>q</i>CO₂, accounting for 56.2% and 58.4% of the variance, respectively. In conclusion, the effects of long-term N deposition on soil microbial respiration and metabolic quotient in subtropical forests were dose-dependent. High N deposition suppressed microbial respiration by reducing soil C/N, whereas low N deposition increased microbial metabolic quotient by exacerbating microbial N/P imbalance.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2537-2546"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of nebkhas succession on the stoichiometry in organs of <i>Nitraria tangutorum</i> and soils.","authors":"Peng Lyu, Jian-Kang Liu, Jie Zhang, Na Shi, Hui-Qin Lan, Juan-Juan Meng, Jun-Liang Gao, Gong-Xiang Cao","doi":"10.13287/j.1001-9332.202608.044","DOIUrl":"10.13287/j.1001-9332.202608.044","url":null,"abstract":"<p><p>We analyzed the stoichiometry of carbon, nitrogen, and phosphorus in different organs of <i>Nitraria tangutorum</i> (roots, stems, and leaves) and soil across four succession stages in nebkhas in the desert-oasis ecotone: initial, developing, stable, and declining. The results showed that soil organic carbon, total nitrogen, total phosphorus, C:N, and C:P all peaked at the stable stage and then decreased, with reductions ranging from 25.9% to 64.9%, while the N:P was highest at the declining stage, increasing by 42.8% relative to the initial stage. Across all stages, leaf N and P contents were significantly higher than those in stems and roots. As succession progressed, stem and root C contents first increased and then decreased, peaking at the developing stage, with respective increases of 13.3% and 27.7%. Leaf and stem N contents were highest at the stable stage, with increases of 26.0% and 12.3%, respectively. Root N content declined by 40.7%. Stem and root P contents were lowest at the stable stage but rebounded significantly at the declining stage, increasing by 34.2% and 34.5%, respectively. The C:N and C:P of roots and stems initially increased and then decreased, peaking at either the developing or stable stages. In contrast, leaf C:N showed a gradual decline, leaf C:P first decreased and then increased, and leaf N:P gradually increased with succession. Multivariate analyses indicated that nebkha succession positively regulated soil physi-cochemical properties and root stoichiometric characteristics, while indirectly negatively regulating those of stems and leaves, thereby driving the plant-soil system away from nutrient accumulation toward depletion, and shifting nutrient limitation status from N limitation to N and P co-limitation.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2528-2536"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatiotemporal variations in ecosystem services and their influencing factors in the agro-pastoral transition zone of northern China during 2000-2020.","authors":"Chun-Hui Zhan, Jian Zhang, Yaoyuan Fan, Si-Yi Cheng, Xiao-Ran Ren","doi":"10.13287/j.1001-9332.202608.028","DOIUrl":"10.13287/j.1001-9332.202608.028","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Quantifying the spatiotemporal patterns and driving mechanisms of ecosystem services in the agro-pastoral transition zone of northern China is crucial for maintaining their regional ecological barrier functions and achieving sustainable land management. Based on the InVEST, CASA, and RWEQ models, we evaluated five key ecosystem services (food production, carbon sequestration, soil and water conservation, windbreak and sand fixation, and water yield) from 2000 to 2020 in the agro-pastoral transition zone of northern China, and further combined spatial statistics and machine learning methods to reveal their spatiotemporal differentiation characteristics and dominant driving factors. The results showed strong spatial variations. High-value areas of food production were distributed in the eastern plains, while high-value areas of carbon sequestration and soil and water conservation were stably distributed in the southern region and along mountain ranges. High-value areas of windbreak and sand fixation were located in the north, and high-value areas of water yield were mainly situated in the south and west. From 2000 to 2020, ecosystem services displayed stage-specific evolutionary characteristics. Food production increased continuously, with the total volume growing from 2.32×10&lt;sup&gt;7&lt;/sup&gt; t to 6.53×10&lt;sup&gt;7&lt;/sup&gt; t. Carbon sequestration generally increased, rea-ching a peak of 10.7×10&lt;sup&gt;7&lt;/sup&gt; t in 2015 before slightly declining. Soil and water conservation fluctuated upward, reaching a high value of 3.63×10&lt;sup&gt;9&lt;/sup&gt; t in 2010, decreasing slightly in 2015, and then peaking at 4.03×10&lt;sup&gt;9&lt;/sup&gt; t in 2020. Water yield rose slowly and tended to stabilize after 2010. Windbreak and sand fixation changed most drastically, first decreasing from 4.28×10&lt;sup&gt;9&lt;/sup&gt; t in 2000 to 2.98×10&lt;sup&gt;9&lt;/sup&gt; t in 2010, and ultimately rising to 14.7×10&lt;sup&gt;9&lt;/sup&gt; t in 2020. The driving mechanisms for each ecosystem service were distinctly differentiated. Precipitation was the strongest positive driving factor for water yield (SHAP value was 67.95). Elevation dominated the spatial distribution pattern of food production (SHAP value was 64.47). Slope showed a strong negative association with soil and water conservation (SHAP value was 38.28). Wind speed was the primary limiting factor for windbreak and sand fixation (SHAP value was 7.02), and its changes were jointly driven by wind speed and the positive contribution of precipitation. Carbon sequestration showed negative associations with nitrogen deposition, wind speed, and precipitation. Ecosystem ser-vices in the agro-pastoral transition zone of northern China exhibited spatiotemporal heterogeneity, with synergetic and trade-off relationships coexisting among different services, reflecting multifunctional coupling. Based on the differences in driving mechanisms between natural conditions and human activities, regional ecological management should implement zoned and classified regulation to optimize th","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2704-2718"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aboveground-belowground stoichiometric characteristics and allometric relationships across different vegetation types in Luo Mountain, Ningxia, China.","authors":"Ying-Ying Yang, Tian-Yu Yang, Shao-Hua Guo, Fang-Yu Liu, Bing Cao, Jun-Long Yang, Xue-Lei Xu","doi":"10.13287/j.1001-9332.202608.004","DOIUrl":"10.13287/j.1001-9332.202608.004","url":null,"abstract":"<p><p>We investigated the differences in ecological stoichiometric characteristics between aboveground and belowground components across five typical vegetation types in the Luo Mountain, Ningxia, including desert steppe, shallow mountain shrubland, broadleaf forest, mixed coniferous and broad-leaved forest, and coniferous forest. We examined the allometric growth relationships and homeostasis features of aboveground and belowground stoichiome-try, and analyze the main litter and soil nutrients influencing ecological stoichiometry. Results showed that leaf carbon (C), nitrogen (N), and phosphorus (P) contents were significantly higher than roots across all vegetation types. Desert steppe exhibited the highest leaf C content (464.45 g·kg^-1), being significantly higher than the three forest types, while its root C content was the lowest (235.44 g·kg^-1). Shallow mountain shrubland had the lowest leaf N and P contents (18.43 and 0.58 g·kg^-1, respectively), while its leaf C/N, C/P, and N/P were the highest (24.9, 795.5, and 31.9, respectively). The five vegetation types exhibited significant negative allometric relationship between leaf and root C contents. There was significant positive allometric relationship for leaf and root P contents. Leaf C-P exhibited negative allometry, whereas leaf N-P and root C-N showed isometric growth. Leaf and root N contents, along with C/N, C/P, and N/P, remained absolutely stable, while P content was consistently sensitive. Litter N/P had the greatest impact on leaf stoichiometry, while litter C/P most influenced root stoichio-metry. Aboveground nutrient allocation was higher than belowground part in all vegetation types of Luo Mountain, with shallow mountain shrubland adopting a more conservative resource utilization strategy, while the other vegetation types tended to be resource acquisition. There was a trade-off for C allocation in Luo Mountain plants, but a synergistic strategy for P allocation.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2509-2518"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response characteristics of soil physicochemical properties after broad-leaved transformation of pure <i>Cunninghamia lanceolata</i> plantation in Dagangshan Region, Jiangxi, China.","authors":"Yuan Yuan, Ke-Qin Xu, Zong-Ming Cai, Qiong Ouyang, Jia-Bao Yao, Bin Xiao, Ying Ding, Bin Wang","doi":"10.13287/j.1001-9332.202608.041","DOIUrl":"10.13287/j.1001-9332.202608.041","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Soil quality and productivity usually decline with long-term monoculture of &lt;i&gt;Cunninghamia lanceolata&lt;/i&gt;. To clarify the soil improvement potential of native broad-leaved tree species in subtropical regions on degraded &lt;i&gt;C. lanceolata&lt;/i&gt; plantation, we focused on three kinds of broad-leaved monoculture of &lt;i&gt;Phoebe bournei&lt;/i&gt;, &lt;i&gt;Schima superba&lt;/i&gt;, and &lt;i&gt;Cyclobalanopsis gilva&lt;/i&gt;, using &lt;i&gt;C. lanceolata&lt;/i&gt; harvested plantation as control. We examined the responses of soil physicochemical properties in different soil layers (0-20, 20-40, and 40-60 cm) after transforming a pure Chinese fir forest into pure broad-leaved forests. The results showed that broad-leaved pure plantations improved the quality of surface soil (0-20 cm), with &lt;i&gt;P. bournei&lt;/i&gt; pure plantation showing the greatest improvement in soil pore structure and water retention. Compared with the &lt;i&gt;C. lanceolata&lt;/i&gt; pure plantation, soil total porosity, capillary porosity, capi-llary water-holding capacity and field water-holding capacity in the surface layer of &lt;i&gt;P. bournei&lt;/i&gt; pure plantation increased by 6.4%-11.7%, while the mass water content was significantly increased by 28.7%. &lt;i&gt;S. superba&lt;/i&gt; pure plantation showed obvious advantages in enhancing soil organic carbon and total nitrogen content, which were 2.8 and 3.6 times that of the &lt;i&gt;C. lanceolata&lt;/i&gt; pure plantation, and 2.5 and 2.0 times that of the control, respectively. &lt;i&gt;C. gilva&lt;/i&gt; pure plantation performed better in promoting available nutrients accumulation. The contents of alkali-hydrolyzable nitrogen and available phosphorus in the surface layer increased by 89.8% and 204.9% respectively compared with the &lt;i&gt;C. lanceolata&lt;/i&gt; monoculture, and increased by 36.4% and 85.8% respectively compared with the control. With the deepening of soil layer, the improvement advantages of broad-leaved pure plantations significantly diminished. In the 40-60 cm soil layer of three broad-leaved pure plantation, soil bulk density increased by 8.7%-11.4% compared with the surface layer, while porosity, water-holding capacity, and the contents of soil organic carbon, total nitrogen, available nitrogen, and available phosphorus decreased by 15.4%-52.4% compared with the surface layer. The content of total phosphorus, available phosphorus, and available potassium in the 40-60 cm soil layer were generally low, indicating that there were still phosphorus and potassium limitations in the deep soil after the broad-leaved transformation of degraded &lt;i&gt;C. lanceolata&lt;/i&gt; plantation. Correlation analysis showed that the maxi-mum water-holding capacity, capillary water-holding capacity and field water-holding capacity were significantly positively correlated with total porosity and capillary porosity, but significantly negatively correlated with soil bulk density. Soil organic carbon content was significantly positively correlated with total nitrogen, alkaline hydrolysable nitrogen, and available phosphorus, indicating that soi","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"37 8","pages":"2481-2490"},"PeriodicalIF":0.0,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148814172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}