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Zhou X, Ouyang S, Saurer M, Feng M, Bose AK, Duan H, Tie L, Shen W, Gessler A. Species-specific responses of C and N allocation to N addition: evidence from dual 13C and 15N labeling in three tree species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172164. [PMID: 38580112 DOI: 10.1016/j.scitotenv.2024.172164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/29/2024] [Accepted: 03/31/2024] [Indexed: 04/07/2024]
Abstract
Soil nitrogen (N) availability affects plant carbon (C) utilization. However, it is unclear how various tree functional types respond to N addition in terms of C assimilation, allocation, and storage. Here, a microcosm experiment with dual 13C and 15N labeling was conducted to study the effects of N addition (i.e., control, 0 g N kg-1; moderate N addition, 1.68 g N kg-1; and high N addition, 3.36 g N kg-1 soil) on morphological traits, on changes in nonstructural carbohydrates (NSC) in different organs, as well as on C and N uptake and allocation in three European temperate forest tree species (i.e., Acer pseudoplatanus, Picea abies and Abies alba). Our results demonstrated that root N uptake rates of the three tree species increased by N addition. In A. pseudoplatanus, N uptake by roots, N allocation to aboveground organs, and aboveground biomass allocation significantly improved by moderate and high N addition. In A. alba, only the high N addition treatment considerably raised aboveground N and C allocation. In contrast, biomass as well as C and N allocation between above and belowground tissues were not altered by N addition in P. abies. Meanwhile, NSC content as well as C and N coupling (represented by the ratio of relative 13C and 15N allocation rates in organs) were affected by N addition in A. pseudoplantanus and P. abies but not in A. alba. Overall, A. pseudoplatanus displayed the highest sensitivity to N addition and the highest N requirement among the three species, while P. abies had a lower N demand than A. alba. Our findings highlight that the responses of C and N allocation to soil N availability are species-specific and vary with the amount of N addition.
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Affiliation(s)
- Xiaoqian Zhou
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang 550025, China
| | - Shengnan Ouyang
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang 550025, China; Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf 8903, Switzerland.
| | - Matthias Saurer
- Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf 8903, Switzerland
| | - Mei Feng
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang 550025, China
| | - Arun K Bose
- Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf 8903, Switzerland; Forestry and Wood Technology Discipline, Khulna University, Khulna 9208, Bangladesh
| | - Honglang Duan
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang 550025, China
| | - Liehua Tie
- Institute for Forest Resources and Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang 550025, China
| | - Weijun Shen
- Guangxi Key Laboratory of Forest Ecology and Conservation, State Key Laboratory for Conservation and Utilization of Agro-bioresources, College of Forestry, Guangxi University, Nanning, Guangxi 530004, China
| | - Arthur Gessler
- Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf 8903, Switzerland; Institute of Terrestrial Ecosystems, ETH Zurich, Zurich 8902, Switzerland
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Li S, Fan W, Xu G, Cao Y, Zhao X, Hao S, Deng B, Ren S, Hu S. Bio-organic fertilizers improve Dendrocalamus farinosus growth by remolding the soil microbiome and metabolome. Front Microbiol 2023; 14:1117355. [PMID: 36876063 PMCID: PMC9975161 DOI: 10.3389/fmicb.2023.1117355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/24/2023] [Indexed: 02/17/2023] Open
Abstract
Organic and microbial fertilizers have potential advantages over inorganic fertilizers in improving soil fertility and crop yield without harmful side-effects. However, the effects of these bio-organic fertilizers on the soil microbiome and metabolome remain largely unknown, especially in the context of bamboo cultivation. In this study, we cultivated Dendrocalamus farinosus (D. farinosus) plants under five different fertilization conditions: organic fertilizer (OF), Bacillus amyloliquefaciens bio-fertilizer (Ba), Bacillus mucilaginosus Krassilnikov bio-fertilizer (BmK), organic fertilizer plus Bacillus amyloliquefaciens bio-fertilizer (OFBa), and organic fertilizer plus Bacillus mucilaginosus Krassilnikov bio-fertilizer (OFBmK). We conducted 16S rRNA sequencing and liquid chromatography/mass spectrometry (LC-MS) to evaluate the soil bacterial composition and soil metabolic activity in the different treatment groups. The results demonstrate that all the fertilization conditions altered the soil bacterial community composition. Moreover, the combination of organic and microbial fertilizers (i.e., in the OFBa and OFBmK groups) significantly affected the relative abundance of soil bacterial species; the largest number of dominant microbial communities were found in the OFBa group, which were strongly correlated with each other. Additionally, non-targeted metabolomics revealed that the levels of soil lipids and lipid-like molecules, and organic acids and their derivatives, were greatly altered under all treatment conditions. The levels of galactitol, guanine, and deoxycytidine were also markedly decreased in the OFBa and OFBmK groups. Moreover, we constructed a regulatory network to delineated the relationships between bamboo phenotype, soil enzymatic activity, soil differential metabolites, and dominant microbial. The network revealed that bio-organic fertilizers promoted bamboo growth by modifying the soil microbiome and metabolome. Accordingly, we concluded that the use of organic fertilizers, microbial fertilizers, or their combination regulated bacterial composition and soil metabolic processes. These findings provide new insights into how D. farinosus-bacterial interactions are affected by different fertilization regiments, which are directly applicable to the agricultural cultivation of bamboo.
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Affiliation(s)
- Shangmeng Li
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Wei Fan
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Gang Xu
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Ying Cao
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Xin Zhao
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Suwei Hao
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Bin Deng
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Siyuan Ren
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
| | - Shanglian Hu
- Lab of Plant Cell Engineering, Southwest University of Science and Technology, Mianyang, China.,Engineering Research Center for Biomass Resource Utilizaiton and Modification of Sichuan Province, Mianyang, China
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Wang F, Chen FS, Fang XM, Wang H, Hu X. Phosphorus addition regulates the growth of Chinese fir by changing needle nitrogen fractions in growing and dormant seasons. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158230. [PMID: 36007640 DOI: 10.1016/j.scitotenv.2022.158230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/08/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Forest productivity is generally limited by nutrient scarcity. This study aims to reveal seasonal interactions among leaf carbon (C), nitrogen (N) fractions and tree growth driven by nutrient addition in a subtropical forest. Here, a field nutrient addition experiment was conducted with six treatments, namely, +N5 (5 g N m-2 yr-1), +N10 (10 g N m-2 yr-1), +P5 (5 g P m-2 yr-1), +N5 + P5, +N10 + P5, and control (N0 + P0). C fractions (structural and non-structural carbohydrates) and N fractions (soluble N, nucleic N and protein N) in needles as well as tree growth indicated by basal area increment (BAI) were measured in growing and dormant seasons. Total N and protein N in old needles were significantly increased by P addition, while no significant differences of non-structural carbohydrates in young (<1-year old) and old needles (>1-year old) were detected among the treatments in both seasons. N and P addition increased the structural carbohydrates of old needles in dormant season. P addition decreased and increased tree growth in growing and dormant seasons, respectively. The variation of BAI was explained 18.3 % by total N and 17.8 % by protein N in growing season, and was explained 33.9 % by total N and 34.2 % by protein N in dormant season. Our study suggested that the P addition effect on Chinese fir growth mostly depends on needle N fractions. This study highlights tree seasonal growth driven by nutrient alteration might be characterized by leaf N fractions rather than C fractions in subtropical forests.
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Affiliation(s)
- Fangchao Wang
- Postdoctoral Research Station of Management Science and Engineering, Nanchang University, Nanchang 330031, China; Key Laboratory of National Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, Jiangxi Agricultural University, Nanchang 330045, China
| | - Fu-Sheng Chen
- Key Laboratory of National Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, Jiangxi Agricultural University, Nanchang 330045, China.
| | - Xiang-Min Fang
- Key Laboratory of National Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, Jiangxi Agricultural University, Nanchang 330045, China
| | - Huimin Wang
- Qianyanzhou Ecological Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiaofei Hu
- Postdoctoral Research Station of Management Science and Engineering, Nanchang University, Nanchang 330031, China.
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Jiang X, Song M, Qiao Y, Liu M, Ma L, Fu S. Long-term water use efficiency and non-structural carbohydrates of dominant tree species in response to nitrogen and water additions in a warm temperate forest. FRONTIERS IN PLANT SCIENCE 2022; 13:1025162. [PMID: 36420022 PMCID: PMC9676439 DOI: 10.3389/fpls.2022.1025162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen (N) deposition tends to accompany precipitation in temperate forests, and vegetation productivity is mostly controlled by water and N availability. Many studies showed that tree species response to precipitation or N deposition alone influences, while the N deposition and precipitation interactive effects on the traits of tree physiology, especially in non-structural carbohydrates (NSCs) and long-term water use efficiency (WUE), are still unclear. In this study, we measured carbon stable isotope (δ13C), total soluble sugar and starch content, total phenols, and other physiological traits (e.g., leaf C:N:P stoichiometry, lignin, and cellulose content) of two dominant tree species (Quercus variabilis Blume and Liquidambar formosana Hance) under canopy-simulated N deposition and precipitation addition to analyze the changes of long-term WUE and NSC contents and to explain the response strategies of dominant trees to abiotic environmental changes. This study showed that N deposition decreased the root NSC concentrations of L. formosana and the leaf lignin content of Q. variabilis. The increased precipitation showed a negative effect on specific leaf area (SLA) and a positive effect on leaf WUE of Q. variabilis, while it increased the leaf C and N content and decreased the leaf cellulose content of L. formosana. The nitrogen-water interaction reduced the leaf lignin and total phenol content of Q. variabilis and decreased the leaf total phenol content of L. formosana, but it increased the leaf C and N content of L. formosana. Moreover, the response of L. formosana to the nitrogen-water interaction was greater than that of Q. variabilis, highlighting the differences between the two dominant tree species. The results showed that N deposition and precipitation obviously affected the tree growth strategies by affecting the NSC contents and long-term WUE. Canopy-simulated N deposition and precipitation provide a new insight into the effect of the nitrogen-water interaction on tree growth traits in a temperate forest ecosystem, enabling a better prediction of the response of dominant tree species to global change.
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Affiliation(s)
- Xiyan Jiang
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Mengya Song
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Yaqi Qiao
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Mengzhou Liu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Lei Ma
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Shenglei Fu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Geography and Environmental Science, Henan University, Kaifeng, China
- Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security, College of Geography and Environmental Science, Henan University, Kaifeng, China
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Zhang S, Zhang Q, Liu Z, Mamtimin S, Zhou X, Yin B, Zhang Y. Long-term snow alters the sensitivity of nonstructural carbohydrates of Syntrichia caninervis to snow cover: Based on a 7-year experiment. FRONTIERS IN PLANT SCIENCE 2022; 13:999584. [PMID: 36311058 PMCID: PMC9614234 DOI: 10.3389/fpls.2022.999584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/01/2022] [Indexed: 06/16/2023]
Abstract
The dynamics of nonstructural carbohydrates (NSC) profoundly affect productivity and ecological adaptability to adversity in plants. Global warming induced the frequent occurrence of extreme precipitation events that altered the winter snow pattern in deserts. However, there is a lack of understanding of how desert mosses respond to long-term snow cover change at the NSC level. Therefore, in this study, long-term (7-years) winter snow removal (-S), ambient snow (CK), and double snow (+S) experiments were set in the field to investigate the content of NSC and its component in Syntrichia Caninervis. Our results showed that changes in snow depth, snow years, and their interaction significantly affected NSC and its component of Syntrichia caninervis. Compared to snow removal, NSC, soluble sugar, and starch significantly decreased with the increasing snow depth. The ratio of soluble sugar to starch significantly increased, while NSC and soluble sugar gradually returned to the normal level with an increase in snow years. It is worth mentioning that snow removal significantly reduced the soluble sugar to starch ratio compared to ambient snow depth, whereas the double snow experiment significantly increased the ratio of soluble sugar to starch during winter. This indicated an obvious trade-off between carbon utilization and carbon storage in Syntrichia caninervis. Snow removal stimulated Syntrichia caninervis to store sufficient carbon sources by starch accumulation for its future growth, while double snow promoted its current growth by soluble sugar accumulation. The variance in decomposition showed that soil physical and chemical properties, snow cover, and their interaction explained 83% of the variation in NSC and its components, with soil and plant water content, pH, and electrical conductivity (P-WC, S-WC, S-pH, and S-EC) as significant predictors. This highlights that snow indirectly affected NSC and its component contents by changing soil physical and chemical properties; however, long-term changes in snow cover could slow down its sensitivity to snow.
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Affiliation(s)
- Shujun Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China
| | - Qing Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Ziyi Liu
- Department of Geography, Economics and Geography-BSc(Econ), University College London, London, United Kingdom
| | - Sulayman Mamtimin
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China
| | - Xiaobing Zhou
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Benfeng Yin
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Yuanming Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
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Shen H, Dong S, Xiao J, Zhi Y. Effects of N and P enrichment on plant photosynthetic traits in alpine steppe of the Qinghai-Tibetan Plateau. BMC PLANT BIOLOGY 2022; 22:396. [PMID: 35964004 PMCID: PMC9375904 DOI: 10.1186/s12870-022-03781-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND N (nitrogen) and P (phosphorus) play important roles in plant growth and fitness, and both are the most important limiting factors that affect grassland structure and function. However, we still know little about plant physiological responses to N and P enrichment in alpine grassland of the Qinghai-Tibetan Plateau. In our experiment, five dominant common herbaceous species were selected and their photosynthetic parameters, leaf N content, and aboveground biomass were measured. RESULTS We found that species-specific responses to N and P enrichment were obvious at individual level. N addition (72 kg Nha-1 yr-1), P addition (36 kg Pha-1 yr-1) and NP addition (72 kg Nha-1 yr-1and 36 kg P ha-1 yr-1, simultaneously) significantly promoted net photosynthetic rate of Leymus secalinus. Differential responses also existed in the same functional groups. Responses of forb species to the nutrients addition varied, Aconitum carmichaeli was more sensitive to nutrients addition including N addition (72 kg Nha-1 yr-1), P addition (36 kg Pha-1 yr-1) and NP addition (72 kg Nha-1 yr-1and 36 kg P ha-1 yr-1). Responses of plant community photosynthetic traits were not so sensitive as those of plant individuals under N and P enrichment. CONCLUSIONS Our findings highlighted that photosynthetic responses of alpine plants to N and P enrichment were species-specific. Grass species Leymus secalinus had a higher competitive advantage compared with other species under nutrient enrichment. Additionally, soil pH variation and nutrients imbalance induced by N and P enrichment is the main cause that affect photosynthetic traits of plant in alpine steppe of the Qinghai-Tibetan Plateau.
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Affiliation(s)
- Hao Shen
- School of Grassland Science, Beijing Forestry University, Beijing, 100083, China
| | - Shikui Dong
- School of Grassland Science, Beijing Forestry University, Beijing, 100083, China.
- School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Normal University, Beijing, 100875, China.
- Department of Natural Resources, Cornell University, Ithaca, NY, 14853, USA.
| | - Jiannan Xiao
- School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Normal University, Beijing, 100875, China
| | - Yangliu Zhi
- School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Normal University, Beijing, 100875, China
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Li X, Song X, Zhao J, Lu H, Qian C, Zhao X. Shifts and plasticity of plant leaf mass per area and leaf size among slope aspects in a subalpine meadow. Ecol Evol 2021; 11:14042-14055. [PMID: 34707838 PMCID: PMC8525184 DOI: 10.1002/ece3.8113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 08/26/2021] [Accepted: 08/31/2021] [Indexed: 11/08/2022] Open
Abstract
The composition of vegetation on a slope frequently changes substantially owing to the different micro-environments of various slope aspects. To understand how the slope aspect affects the vegetation changes, we examined the variations in leaf mass per area (LMA) and leaf size (LS) within and among populations for 66 species from 14 plots with a variety of slope aspects in a subalpine meadow. LMA is a leaf economic trait that is tightly correlated with plant physiological traits, while the LS shows a tight correlation with leaf temperature, indicating the strategy of plants to self-adjust in different thermal and hydraulic conditions. In this study, we compared the two leaf traits between slope aspects and between functional types and explored their correlation with soil variables and heat load. Our results showed that high-LMA, small-leaved species were favored in south-facing slopes, while the reverse was true in north-facing areas. In detail, small dense-leaved graminoids dominated the south slopes, while large thin-leaved forbs dominated the north slopes. Soil moisture and the availability of soil P were the two most important soil factors that related to both LMA and LS, and heat load also contributed substantially. Moreover, we disentangled the relative importance of intraspecific trait variation and species turnover in the trait variation among plots and found that the intraspecific variation contributed 98% and 56% to LMA and LS variation among communities, respectively, implying a large contribution of intraspecific trait plasticity. These results indicate that LMA and LS are two essential leaf traits that affect the adaptation or acclimation of plants underlying the vegetation composition changes in different slope aspects in the subalpine meadow.
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Affiliation(s)
- Xin’e Li
- Division of Grassland ScienceCollege of Animal Science and TechnologyYangzhou UniversityYangzhouChina
| | - Xiaoyu Song
- Northwest Institute of Eco‐Environment and ResourcesChinese Academy of SciencesLanzhouChina
| | - Jun Zhao
- Department of life sciencesLvliang UniversityLvliangChina
| | - Haifeng Lu
- Division of Grassland ScienceCollege of Animal Science and TechnologyYangzhou UniversityYangzhouChina
| | - Cheng Qian
- Division of Grassland ScienceCollege of Animal Science and TechnologyYangzhou UniversityYangzhouChina
| | - Xin Zhao
- Division of Grassland ScienceCollege of Animal Science and TechnologyYangzhou UniversityYangzhouChina
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