Journal of Plant Ecology最新文献

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Seven-decade forest succession reveals how species colonization and extinction drive long-term community structure dynamics 70年的森林演替揭示了物种定植和灭绝如何驱动长期的群落结构动态
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-02-23 DOI: 10.1093/jpe/rtad008
S. Rao, Xinyu Miao, Shu-ya Fan, Yu-hao Zhao, Chi Xu, Shao‐peng Li
{"title":"Seven-decade forest succession reveals how species colonization and extinction drive long-term community structure dynamics","authors":"S. Rao, Xinyu Miao, Shu-ya Fan, Yu-hao Zhao, Chi Xu, Shao‐peng Li","doi":"10.1093/jpe/rtad008","DOIUrl":"https://doi.org/10.1093/jpe/rtad008","url":null,"abstract":"\u0000 Understanding how community phylogenetic and functional structures change over succession has gained increasing attention during the last decades, but the lack of long-term time-series data has limited our understanding of the patterns and mechanisms of these changes. This is especially the case for forest communities. Here we used an exceptionally long-term data over 68 years to analyze the secondary succession dynamics of a subtropical forest in Southeast China. We found community phylogenetic and functional structures showed opposite temporal trends. The mean pairwise phylogenetic distance between species increased, but the mean nearest taxon distance decreased over succession, indicating both phylogenetically distantly related and sister species co-occurred in late-successional communities. In contrast, both the mean pairwise functional distance and mean nearest functional distance between species decreased over time, and community functional structure switched from overdispersion to clustering. We further distinguished the contributions of species colonization and extinction to community structural changes. We found that the new colonists were generally more distantly related to each other and to the residents than the local extinct species, resulting in increased phylogenetic overdispersion over succession. In contrast, from a functional perspective, we found species with more similar traits to the resident species had a greater chance to colonize but a lower chance to go locally extinct, which shifted community functional structure toward clustering. Together, our study highlights the critical role of species colonization and extinction in disentangling assembly mechanisms underlying community phylogenetic and functional structures over long-term succession.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47471708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Altitudinal variations of the rate and temperature sensitivity of soil nitrogen mineralization on the Qinghai-Tibetan Plateau 青藏高原土壤氮矿化速率和温度敏感性的高程变化
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-02-09 DOI: 10.1093/jpe/rtad005
Xikang Hou, D. Kou, M. Hirota, T. Guo, Tao Lang
{"title":"Altitudinal variations of the rate and temperature sensitivity of soil nitrogen mineralization on the Qinghai-Tibetan Plateau","authors":"Xikang Hou, D. Kou, M. Hirota, T. Guo, Tao Lang","doi":"10.1093/jpe/rtad005","DOIUrl":"https://doi.org/10.1093/jpe/rtad005","url":null,"abstract":"\u0000 Changes in soil nitrogen mineralization can impact nutrient availability, and further affect plant growth. It is unclear, however, how temperature elevation in alpine grassland will affect soil net N mineralization rate (Nmin) across altitudes. At six altitudes (3200 m to 4200 m with an interval of 200 m) along a slope in Lenglong mountain in the northern Qinghai-Tibetan Plateau, we performed an in-situ soil incubation experiment by using the resin-core method to assess altitudinal variations of Nmin. Meanwhile, we evaluated the effects of temperature elevation on Nmin and its temperature sensitivity (Q10) through a soil downward transplantation experiment based on three reference baseline altitudes (3800 m, 4000 m, and 4200 m). The results showed that high altitudes generally led to low values of Nmin. Structural equation modelling analysis revealed that Nmin along the altitude was mainly controlled by soil temperature. Increased temperature caused by the altitude transplantation significantly elevated Nmin for all of the three reference altitudes. The value of Q10 was 3.4 for soil samples transplanted from the reference altitude of 4200 m, which was about twice that of the lower reference altitudes of 4000 m and 3800 m.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46942282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Does a tragedy of the commons due to individual competition arise from genetically fixed traits or plastic traits in dryland wheat? An experimental verification 旱地小麦的遗传固定性状或可塑性性状是否会导致个体竞争造成的公地悲剧?实验验证
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-02-08 DOI: 10.1093/jpe/rtad004
Li Zhu, Jun Xiang, Da‐Yong Zhang, Wen Wang, Shuang-Guo Zhu, Bao-Zhong Wang, Mengyang Li, Y. Xiong
{"title":"Does a tragedy of the commons due to individual competition arise from genetically fixed traits or plastic traits in dryland wheat? An experimental verification","authors":"Li Zhu, Jun Xiang, Da‐Yong Zhang, Wen Wang, Shuang-Guo Zhu, Bao-Zhong Wang, Mengyang Li, Y. Xiong","doi":"10.1093/jpe/rtad004","DOIUrl":"https://doi.org/10.1093/jpe/rtad004","url":null,"abstract":"\u0000 Growth redundancy, the overgrowth of resource-foraging organs in crop stands, is often detrimental to yield and is thus called a ‘tragedy of the commons’. A tragedy can also arise owing to the plastic overproduction of competitive structures when intra-variety individuals forage in close proximity to each other. However, little is known about the sensitivity of crop varieties and resource availability to this ‘plastic’ tragedy. Pot experiments were designed to investigate this issue. The root competition environment was imposed by growing two plants of the same variety in mesh and plastic partitions. Two wheat varieties (old Monkhead and modern 92-46) were used, and two resource levels were established. Compared to 92-46, Monkhead allocated more biomass to stems and leaves and concurrently less to seeds. We identified intra-variety neighbour effects only in 4 out of 24 allometric comparisons with a small magnitude. Allometric data also revealed a lowered response to fertiliser addition in 92-46 than in Monkhead. Based on a limited sample size, our results revealed a trade-off between above-ground vegetative growth and crop yield. This trade-off results in a tragedy of the commons in old Monkhead and enhanced yields in modern 92-46. The tragedy of the commons in wheat may generally arise from genetically fixed traits in terms of growth redundancy in old varieties, rather than from the plastic behaviour of individuals. Modern 92-46 may adopt a conservative strategy of resource use, whereas old Monkhead employs an exploitative strategy. Our findings highlight breeders should select genotypes with low individual competitiveness.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45103570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Observer error in grassland vegetation surveys: Effects on species diversity metrics and species-abundance relationships 草地植被调查中的观察者误差:对物种多样性指标和物种丰度关系的影响
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-01-21 DOI: 10.1093/jpe/rtad002
L. Morrison, S. Leis, Mike DeBacker
{"title":"Observer error in grassland vegetation surveys: Effects on species diversity metrics and species-abundance relationships","authors":"L. Morrison, S. Leis, Mike DeBacker","doi":"10.1093/jpe/rtad002","DOIUrl":"https://doi.org/10.1093/jpe/rtad002","url":null,"abstract":"\u0000 We investigated the effect of observer error on four commonly used species diversity measures: species richness, Shannon-Weiner diversity, Shannon-Weiner evenness, and Simpson's index of diversity. We also evaluated how observer error affects inferences derived from multivariate analyses of species-abundance relationships as determined by non-metric multidimensional scaling (NMS) ordination. Grassland vegetation was sampled by three different botanists at two national park units in Missouri and Kansas, USA. The same plots were sampled by two of the botanists, who compiled lists of species composition and estimated foliar cover. Differences in the data records were then compared. Pseudoturnover (i.e., apparent turnover due to observer error) ranged from 17.1 to 22.1%, and differences in cover class estimation ranged from 21.5 to 30.5%. The percentage difference in species diversity measures between pairs of observers depended on how data were summarized, but were always <20%, and often <10%. Based on these results, species diversity metrics are affected to a relatively smaller extent by observer error than turnover indices. Turnover indices, however, contain more information because they track individual species, whereas species are interchangeable in most species diversity indices. Thus less of the error is identified because of how species diversity indices are calculated. NMS ordinations revealed that while the characterizations of some plots by different observers were similar, differences between observers’ records for other plots resulted in greater separation in ordination space. Points representing one observer’s records were often shifted in ordination space in the same direction compared to the other observer.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42512471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aboveground carbon sequestration rate in alpine forests on the eastern Tibetan Plateau: Impacts of future forest management options 青藏高原东部高山森林地上固碳率:未来森林管理方案的影响
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-01-11 DOI: 10.1093/jpe/rtad001
Yang Lin, Jiangtao Xiao, Yongping Kou, Jiaxing Zu, Xinran Yu, Yuanyuan Li
{"title":"Aboveground carbon sequestration rate in alpine forests on the eastern Tibetan Plateau: Impacts of future forest management options","authors":"Yang Lin, Jiangtao Xiao, Yongping Kou, Jiaxing Zu, Xinran Yu, Yuanyuan Li","doi":"10.1093/jpe/rtad001","DOIUrl":"https://doi.org/10.1093/jpe/rtad001","url":null,"abstract":"\u0000 Alpine forests in the eastern Tibetan Plateau are important ecological barriers in the upper reaches of the Yangtze River. However, due to continuous high-intensity harvesting, a large number of plantings, and the complete harvesting ban measures in recent decades, the forest tree species and age cohorts have become relatively homogenous, and the biodiversity and ecological functions have been reduced.\u0000 To design effective forest management options to optimize forest structure and increase carbon sequestration capacity, Mao County was selected as the study site and six forest management options (harvesting, planting) of different intensities were tested using the LANDIS-II model to simulate and compare the differences in forest aboveground carbon sequestration rate (ACSR) between these options and the current management option over the next 100 years. Our study indicates that (1) the different harvesting and planting intensities significantly changed the ACSR compared to the current management options; (2) different communities responded differently to the management options, with the ACSR differing significantly in cold temperate conifers and temperate conifers but not in broad-leaved trees (p<0.05); and (3) a comprehensive consideration of forest management options at the species, community and landscape levels is necessary. Our results suggested that implementing a longer harvesting and planting interval (20 years) at the study site can maximize forest ACSR. This study provides an important reference for evaluating the ability of forest management options to restore forest ecological functions and increase carbon sequestration capacity and for selecting effective forest management programs in the eastern Tibetan Plateau.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41947984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dominant species play a leading role in shaping community stability in the northern Tibetan grasslands 优势种对藏北草原群落稳定性的形成起主导作用
2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2023-01-02 DOI: 10.1093/jpe/rtac110
Ge Hou, Peili Shi, Tiancai Zhou, Jian Sun, Ning Zong, Minghua Song, Xianzhou Zhang
{"title":"Dominant species play a leading role in shaping community stability in the northern Tibetan grasslands","authors":"Ge Hou, Peili Shi, Tiancai Zhou, Jian Sun, Ning Zong, Minghua Song, Xianzhou Zhang","doi":"10.1093/jpe/rtac110","DOIUrl":"https://doi.org/10.1093/jpe/rtac110","url":null,"abstract":"Abstract Dominant species may strongly influence biotic conditions and interact with other species, and thus are important drivers of community dynamics and ecosystem functioning, particularly in the stressed environment of alpine grasslands. However, the effects of dominant species on the community stability of different ecosystems remain poorly understood. We examined the mechanisms underlying temporal stability (2014–2020 year) of aboveground productivity and community stability in four alpine grasslands (alpine meadow, alpine meadow steppe, alpine steppe and alpine desert steppe) of the northern Tibetan with different species composition and dominance. Our results showed that community stability was significantly higher in the alpine meadow than in the other three types of grasslands. This difference was mainly attributed to the higher compensatory effect and selection effect in the alpine meadows. Furthermore, dominant species strongly affected community stability by increasing dominant species stability and species asynchrony. However, species richness had little effect on community stability. Our findings demonstrate that dominant species, as foundation species, may play leading roles in shaping community stability in the alpine grasslands, highlighting the importance of conserving dominant species for stable ecosystem functioning in these fragile ecosystems under increasing environmental fluctuations.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":"389 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135653905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The nonlinear change in pollinator assemblages and self-mating syndromes of Primula atrodentata along elevation gradients 报春花传粉者组合和自交综合征沿海拔梯度的非线性变化
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2022-12-29 DOI: 10.1093/jpe/rtac109
Yin-Mei Ma, Yong-Peng Cha, Zhao Tong, Jie Zhang, Qing‐Jun Li
{"title":"The nonlinear change in pollinator assemblages and self-mating syndromes of Primula atrodentata along elevation gradients","authors":"Yin-Mei Ma, Yong-Peng Cha, Zhao Tong, Jie Zhang, Qing‐Jun Li","doi":"10.1093/jpe/rtac109","DOIUrl":"https://doi.org/10.1093/jpe/rtac109","url":null,"abstract":"\u0000 The reproductive strategies of alpine plants are often altered by environmental changes caused by changes in the spatial distribution of the gradient. However, few studies have investigated whether reproductive patterns of the same species vary with elevation. Three natural populations of Primula atrodentata, which are distributed in the eastern Himalayas and have a long flowering period, were selected along the elevation gradients in Shergyla Mountain, Tibet, China. Morph ratio investigation, floral trait measurement, pollinator observation, and manipulated pollination experiments were conducted to explore the changes in self-compatibility and floral traits associated with the selfing syndrome along elevation gradients. We found that the breeding system of the S-morph is facultative outcrossing, and that of the L-morph is obligatory outcrossing. We further found that with increasing elevation, the number of pollen and ovules, anther-stigma distance, and inbreeding depression index first increased and then decreased, whereas the seeds per fruit and seed setting rate under hand self-pollination, pollen limitation, and self-incompatibility index tended to decrease first, but then increased. In addition, pollinator diversity and visiting frequency were the highest at the middle elevation (4050 population), which can better explain the non-linear change in self-fertility with elevation. Our findings provide insights into the evolutionary pattern of self-compatibility in alpine plants along elevational gradients.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45625607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Leaf traits of clonal grasses responding to the ratios of ammonium to nitrate in a semi-arid grassland: leaf order matters 半干旱草地无性系牧草叶片性状对铵硝比的响应:叶片顺序的影响
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2022-12-26 DOI: 10.1093/jpe/rtac108
Ruoxuan Liu, Jungang Chen, Zhengru Ren, Xinfa Chen, Haining Lu, Yuqiu Zhang, Yunhai Zhang
{"title":"Leaf traits of clonal grasses responding to the ratios of ammonium to nitrate in a semi-arid grassland: leaf order matters","authors":"Ruoxuan Liu, Jungang Chen, Zhengru Ren, Xinfa Chen, Haining Lu, Yuqiu Zhang, Yunhai Zhang","doi":"10.1093/jpe/rtac108","DOIUrl":"https://doi.org/10.1093/jpe/rtac108","url":null,"abstract":"\u0000 Leaf is the main organ of photosynthesis. Leaf phenotypic plasticity largely determines the adaptation of plants to enriched nitrogen (N) environments. However, it remains unclear whether the optimal number (proportion) of leaves representing the leaf traits of the whole plant is similar between ambient and N-enriched conditions. Moreover, whether alteration in ammonium (NH4+–N) to nitrate (NO3––N) ratios in atmospheric N deposition will alter the optimal leaf number is unexplored. By adding three NH4+–N/NO3––N ratios in a temperate grassland of northern China since 2014, three traits (leaf area, thickness, and chlorophyll content) of two dominant clonal grasses, Leymus chinensis and Agropyron cristatum, were measured in August 2020. Results showed that under ambient conditions, the mean leaf area, thickness, and chlorophyll content values of two fully expanded leaves were similar to these of all leaves at the plant level, except for the leaf area of L. chinensis, which needed five leaves (78.82% of leaves in the plant). The ratios of NH4+–N/NO3––N increased the number of required sampled leaves and significantly changed the mean value of leaf traits and the maximum value along leaf order. Moreover, the ratios of NH4+–N/NO3––N altered the trade-off among the three leaf traits, which is dependent on leaf order, by increasing leaf area and decreasing leaf thickness. Therefore, our study suggests that to better indicate the leaf traits’ value of the whole plant under N-enriched conditions, measuring all fully expanded leaves or providing a suitable scaling-up parameter is needed.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43999508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The costs of reproduction in plants cannot differ between the sexes 植物的繁殖成本在两性之间没有差别
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2022-12-12 DOI: 10.1093/jpe/rtac103
J. Midgley
{"title":"The costs of reproduction in plants cannot differ between the sexes","authors":"J. Midgley","doi":"10.1093/jpe/rtac103","DOIUrl":"https://doi.org/10.1093/jpe/rtac103","url":null,"abstract":"","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43361197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Interactive effects of plant density and nitrogen availability on the biomass production and leaf stoichiometry of Arabidopsis thaliana 植物密度和氮素有效性对拟南芥生物量生产和叶片化学计量的交互影响
IF 2.7 2区 环境科学与生态学
Journal of Plant Ecology Pub Date : 2022-12-12 DOI: 10.1093/jpe/rtac101
Zhengbing Yan, D. Tian, Han-Yue Huang, Yuan-Feng Sun, Xing-Hui Hou, W. Han, Ya-long Guo, Jingyao Fang
{"title":"Interactive effects of plant density and nitrogen availability on the biomass production and leaf stoichiometry of Arabidopsis thaliana","authors":"Zhengbing Yan, D. Tian, Han-Yue Huang, Yuan-Feng Sun, Xing-Hui Hou, W. Han, Ya-long Guo, Jingyao Fang","doi":"10.1093/jpe/rtac101","DOIUrl":"https://doi.org/10.1093/jpe/rtac101","url":null,"abstract":"\u0000 Plant density and nitrogen (N) availability influence plant survival and nutrient use strategies, but the interaction between these two factors for plant growth and the balance of elements remains poorly addressed. Here we conducted experimental manipulations using Arabidopsis thaliana, with the combination of four levels of plant density and four levels of N addition, and then examined the corresponding changes in plant biomass production (indicated by total plant biomass and biomass partitioning) and nutrient use strategies (indicated by leaf N and phosphorus (P) stoichiometry). The biomass-density relationship was regulated by N availability, with a negative pattern in low N availability but an asymptotic constant final yield pattern at high N availability. Excessive N addition reduced plant growth at low plant density, but this effect was alleviated by increasing plant density. The root to shoot biomass ratio increased with plant density at low N availability, but decreased at high N availability. N availability was more important than plant density in regulating leaf N and P stoichiometry, with the increasing leaf N concentration and decreasing leaf P concentration under increasing N addition, resulting in a negative scaling relationship between these two elemental concentrations. Our results show that N availability and plant density interactively regulate plant biomass production and leaf stoichiometry of A. thaliana, and highlight that the interactive effects of these two factors should be considered when predicting plant growth behavior under intraspecific competitive environments in the context of nutrient changes.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61597356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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