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Jinshi Xu
School of Life Sciences, Northwest University, Xi'an, 710069, China

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Journal article
Published: 19 July 2021 in Acta Oecologica
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Leaf phenological traits vary greatly with plant species, are thought to relate to leaf functional traits, and play an important role in plant growth. In this study, we investigated leaf phenological and functional traits of 52 woody species (324 individuals) from a natural forest in the Loess Plateau in China. Shrubs obtain a longer leaf life span (LLS) through early leaf emergence and later leaf senescence. Shrubs have a longer LLS compared with trees because they have a greater leaf thickness than trees (to prevent early spring frost), leaf phosphorus content ([P]leaf, related to cell division), and C:N ratio and stem density (to prevent mechanical damage). Among all woody species, species with a small SLA and leaf area and species with thick leaves have a longer leaf emergence duration and LLS, which may be related to material energy reserves. In addition, shrubs had a greater [P]leaf and C:N ratio and a longer leaf emergence duration. Our results reveal differences in leaf phenological traits among life forms and indicate that plant functional traits can provide insight into the mechanisms underlying such differences. In addition, the results of this study provide insight into species coexistence and community assembly in temperate deciduous forests.

ACS Style

Lei Wang; Xiaohui Han; Qiulong Yin; Guoxiang Wang; Jinshi Xu; Yongfu Chai; Ming Yue. Differences in leaf phenological traits between trees and shrubs are closely related to functional traits in a temperate forest. Acta Oecologica 2021, 112, 103760 .

AMA Style

Lei Wang, Xiaohui Han, Qiulong Yin, Guoxiang Wang, Jinshi Xu, Yongfu Chai, Ming Yue. Differences in leaf phenological traits between trees and shrubs are closely related to functional traits in a temperate forest. Acta Oecologica. 2021; 112 ():103760.

Chicago/Turabian Style

Lei Wang; Xiaohui Han; Qiulong Yin; Guoxiang Wang; Jinshi Xu; Yongfu Chai; Ming Yue. 2021. "Differences in leaf phenological traits between trees and shrubs are closely related to functional traits in a temperate forest." Acta Oecologica 112, no. : 103760.

Journal article
Published: 26 November 2020 in Diversity
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Trait-based approaches present a promising avenue for improving our understanding of species coexistence and community assembly, while intraspecific trait variation (ITV) across different spatial scales is important in trait-based community assembly mechanisms, especially in extreme environments. In this study, we focused on the functional diversity and community assembly patterns of a desert community across different spatial scales and investigated whether ITV plays a significant role in community assembly processes in arid habitats. A 50 m × 50 m plot with different small quadrats was established in a typical desert community at the transition zone between the Tengger Desert and Loess Plateau in China. A total of 14 traits were selected to assess the trait-based functional diversity and assembly processes in the community. We found that functional diversity showed different patterns when considering ITV and related to different types of traits (chemical traits or morphological traits) and some soil factors (pH and nitrate nitrogen). Plant communities in this study showed stochastic distribution patterns and similar functional diversity patterns based on functional trait approaches, regardless of spatial scales. Also, the effect of ITV on community assembly did not show more effect with increasing scales. These results indicated that ITV diluted deterministic processes in community assembly across scales in arid habitats.

ACS Style

Jinshi Xu; Han Dang; Tingting Tian; Yongfu Chai; Jiaxin Quan; Maolin Lei; Xiao Liu; Yaoxin Guo; Ming Yue. Intraspecific Trait Variation Dilutes Deterministic Processes in Community Assembly of Arid Shrubs across Multiple Scales. Diversity 2020, 12, 447 .

AMA Style

Jinshi Xu, Han Dang, Tingting Tian, Yongfu Chai, Jiaxin Quan, Maolin Lei, Xiao Liu, Yaoxin Guo, Ming Yue. Intraspecific Trait Variation Dilutes Deterministic Processes in Community Assembly of Arid Shrubs across Multiple Scales. Diversity. 2020; 12 (12):447.

Chicago/Turabian Style

Jinshi Xu; Han Dang; Tingting Tian; Yongfu Chai; Jiaxin Quan; Maolin Lei; Xiao Liu; Yaoxin Guo; Ming Yue. 2020. "Intraspecific Trait Variation Dilutes Deterministic Processes in Community Assembly of Arid Shrubs across Multiple Scales." Diversity 12, no. 12: 447.

Research article
Published: 12 February 2020 in Land Degradation & Development
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Human activities may lead to land degradation, and then influencing diversity and function of semi‐arid ecosystem. Understanding the plant community assembly processes and diversity patterns along human activities‐related gradients are an important facet of ecological research and can be used to reveal vegetation dynamics under land degradation on Loess Plateau. In this study, we evaluated the net relatedness index (NRI), phylogenetic diversity, and species diversity along habitat (elevation, slope, aspect, residential distance, succession time) and comprehensive disturbance gradients on the Loess Plateau, China. We found that community assembly processes were mainly influenced by slope and succession time linked to human activity. Study regions with slope > 20°or succession time > 35 yr showed no environmental filtering effect during community assembly processes, because these region usually had fewer cropland development activities. Although phylogenetic and species diversity showed a dissimilar pattern along gradients, we also summarized human activities rather than habitat factors drive diversity patterns. In summary, we demonstrate that human activities mainly influence community assembly processes and diversity patterns. With reduction of human disturbance in future, land degradation will be ameliorated on Loess Plateau. This article is protected by copyright. All rights reserved.

ACS Style

Jinshi Xu; Han Dang; Tingting Tian; Shiqiang Liu; Yongfu Chai; Xiao Liu; Ming Yue; Chengcheng Xiang; Junke Chang. Human disturbance rather than habitat factors drives plant community assembly and diversity patterns in a semiarid region. Land Degradation & Development 2020, 31, 1803 -1811.

AMA Style

Jinshi Xu, Han Dang, Tingting Tian, Shiqiang Liu, Yongfu Chai, Xiao Liu, Ming Yue, Chengcheng Xiang, Junke Chang. Human disturbance rather than habitat factors drives plant community assembly and diversity patterns in a semiarid region. Land Degradation & Development. 2020; 31 (14):1803-1811.

Chicago/Turabian Style

Jinshi Xu; Han Dang; Tingting Tian; Shiqiang Liu; Yongfu Chai; Xiao Liu; Ming Yue; Chengcheng Xiang; Junke Chang. 2020. "Human disturbance rather than habitat factors drives plant community assembly and diversity patterns in a semiarid region." Land Degradation & Development 31, no. 14: 1803-1811.

Journal article
Published: 27 December 2019 in Forests
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Two contradictory niche-based processes, environmental filtering and competitive exclusion, are important ecological processes in community assembly. Quercus wutaishanica forests are the climax communities in the Qinling Mountains and the Loess Plateau, China. Since these areas are characterized by different climate and evolutionary histories, these forests could be a suitable study system to test the phylogenetic niche conservatism hypothesis. We compared variation in community assembly of two distinct Q. wutaishanica forest communities and analyzed how the variations are formed. Quercus wutaishanica forest communities had significantly different species pool, phylogenetic structure and phylogenetic diversity between the two regions that were driven by inconsistency in environment conditions and evolutionary history at the local scale. Soil ammonium nitrogen, soil water content, and nitrate nitrogen play a major role in phylogenetic beta diversity patterns. The effect of environmental filtering on community assembly was more significant on the Loess Plateau than in the Qinling Mountains. Our study also found that local environment is important in mediating the patterns of phylogenetic structure. These findings provide insights into the mechanisms of local community assembly.

ACS Style

Mao Wang; Jinshi Xu; Yongfu Chai; Yaoxin Guo; Xiao Liu; Ming Yue. Differentiation of Environmental Conditions Promotes Variation of Two Quercus wutaishanica Community Assembly Patterns. Forests 2019, 11, 43 .

AMA Style

Mao Wang, Jinshi Xu, Yongfu Chai, Yaoxin Guo, Xiao Liu, Ming Yue. Differentiation of Environmental Conditions Promotes Variation of Two Quercus wutaishanica Community Assembly Patterns. Forests. 2019; 11 (1):43.

Chicago/Turabian Style

Mao Wang; Jinshi Xu; Yongfu Chai; Yaoxin Guo; Xiao Liu; Ming Yue. 2019. "Differentiation of Environmental Conditions Promotes Variation of Two Quercus wutaishanica Community Assembly Patterns." Forests 11, no. 1: 43.

Journal article
Published: 17 December 2019 in Forests
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Phylogenetic and functional diversities and their relationship are important for understanding community assembly, which relates to forest sustainability. Thus, both diversities have been used in ecological studies evaluating community responses to environmental changes. However, it is unclear whether these diversity measures can uncover the actual community assembly processes. Herein, we examined their utility to assess such assembly processes by analyzing similarities in phylogenetic, functional, and taxonomic α- and β-diversities along an elevational gradient. Additionally, we examined the relationships among environment, phylogeny, and functional traits within the community. Based on our results, we evaluated whether phylogenetic or functional diversity could better reveal the actual community assembly processes. We found that taxonomic, phylogenetic, and functional α-diversities were correlated with one another. Although the functional α-diversity showed a linear correlation with the elevational gradient, taxonomic and phylogenetic α-diversities showed unimodal patterns. Both phylogenetic and functional β-diversities correlated with taxonomic β-diversity, but there was no significant relationship between the former. Overall, our results evidenced that phylogenetic diversity and taxonomic diversity showed similar patterns, whereas functional diversity showed a relatively independent pattern, which may be due to limitations in the functional trait dimensions used in the present study. Although it is difficult to unravel whether the environment shapes phylogeny or functional traits within a community, phylogenetic diversity is a good proxy for assessing the assembly processes, whereas functional diversity may improve knowledge on the community by maximizing information about the functional trait dimensions.

ACS Style

Jinshi Xu; Han Dang; Mao Wang; Yongfu Chai; Yaoxin Guo; Yu Chen; Chenguang Zhang; Ming Yue. Is Phylogeny More Useful than Functional Traits for Assessing Diversity Patterns Under Community Assembly Processes? Forests 2019, 10, 1159 .

AMA Style

Jinshi Xu, Han Dang, Mao Wang, Yongfu Chai, Yaoxin Guo, Yu Chen, Chenguang Zhang, Ming Yue. Is Phylogeny More Useful than Functional Traits for Assessing Diversity Patterns Under Community Assembly Processes? Forests. 2019; 10 (12):1159.

Chicago/Turabian Style

Jinshi Xu; Han Dang; Mao Wang; Yongfu Chai; Yaoxin Guo; Yu Chen; Chenguang Zhang; Ming Yue. 2019. "Is Phylogeny More Useful than Functional Traits for Assessing Diversity Patterns Under Community Assembly Processes?" Forests 10, no. 12: 1159.

Original research
Published: 21 November 2019 in Ecology and Evolution
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Southwestern (SW) China is an area of active tectonism and erosion, yielding a dynamic, deeply eroded landscape that influences the genetic structure of the resident populations of plants and animals. Iron walnut (Juglans regia subsp. sigillata) is a deciduous tree species endemic to this region of China and cultivated there for its edible nuts. We sampled 36 iron walnut populations from locations throughout the species' range in SW China and genotyped a total of 765 individuals at five chloroplast DNA regions and 22 nuclear microsatellite loci. Species distribution models were produced to predict the evolution and historical biogeography of iron walnut and to estimate the impacts of climate oscillations and orographic environments on the species' demography. Our results indicated that J. regia subsp. sigillata had relatively low genetic diversity, high interpopulation genetic differentiation, and asymmetric interpopulation gene flow. Based on DIYABC analysis, we identified two lineages of J. sigillata in southwestern China. The lineages (subpopulations) diverge during the last glacial period (~1.34 Ma). Southwestern China was a glacial refuge during the last glacial period, but increasingly colder and arid climates might have fostered the fragmentation of J. regia subsp. sigillata within this refugium. Finally, we found that recent habitat fragmentation has led to a reduction in population connectivity and increased genetic differentiation by genetic drift in isolated populations. Our results support a conclusion that geological and climatic factors since the Miocene triggered the differentiation, evolutionary origin, and range shifts of J. sigillata in the studied region.

ACS Style

Yi‐Wei Sun; Na Hou; Keith Woeste; Chuchu Zhang; Ming Yue; Xiao‐Ying Yuan; Peng Zhao. Population genetic structure and adaptive differentiation of iron walnutJuglans regiasubsp.sigillatain southwestern China. Ecology and Evolution 2019, 9, 14154 -14166.

AMA Style

Yi‐Wei Sun, Na Hou, Keith Woeste, Chuchu Zhang, Ming Yue, Xiao‐Ying Yuan, Peng Zhao. Population genetic structure and adaptive differentiation of iron walnutJuglans regiasubsp.sigillatain southwestern China. Ecology and Evolution. 2019; 9 (24):14154-14166.

Chicago/Turabian Style

Yi‐Wei Sun; Na Hou; Keith Woeste; Chuchu Zhang; Ming Yue; Xiao‐Ying Yuan; Peng Zhao. 2019. "Population genetic structure and adaptive differentiation of iron walnutJuglans regiasubsp.sigillatain southwestern China." Ecology and Evolution 9, no. 24: 14154-14166.

Journal article
Published: 12 November 2015 in Oecologia
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In forest succession, the ecological strategies of the dominant species that are based on functional traits are important in the determination of both the mechanisms and the potential directions of succession. Thirty-one plots were established in the Loess Plateau region of northern Shaanxi in China. Fifteen leaf traits were measured for the 31 dominant species that represented the six stages of succession, and the traits included four that were related to morphology, seven to stoichiometry and four to physiological ecology. The species from the different successional stages had different patterns of distribution of the traits, and different key traits predicted the turnover of the species during succession. The ash and the cellulose contents were key regulatory factors of species turnover in the early successional communities, and the trait niche forces in sugar and leaf dry mass content might become more important with the progression of succession. When only the three herb stages were considered, a progressive replacement of the ruderal by the competitive–ruderal species occurred in the intermediate stages of succession, which was followed by the stress-tolerant–competitive or the competitive-stress tolerant-ruderal strategists late in the succession. Thus, the different species that occurred in the different stages of succession shared different trait-based ecological strategies. Additionally, these differences occurred concomitantly with a shift toward competitive-stress tolerant-ruderal strategies.

ACS Style

Yongfu Chai; Ming Yue; Mao Wang; Jinshi Xu; Xiao Liu; Ruichang Zhang; Pengcheng Wan. Plant functional traits suggest a change in novel ecological strategies for dominant species in the stages of forest succession. Oecologia 2015, 180, 771 -783.

AMA Style

Yongfu Chai, Ming Yue, Mao Wang, Jinshi Xu, Xiao Liu, Ruichang Zhang, Pengcheng Wan. Plant functional traits suggest a change in novel ecological strategies for dominant species in the stages of forest succession. Oecologia. 2015; 180 (3):771-783.

Chicago/Turabian Style

Yongfu Chai; Ming Yue; Mao Wang; Jinshi Xu; Xiao Liu; Ruichang Zhang; Pengcheng Wan. 2015. "Plant functional traits suggest a change in novel ecological strategies for dominant species in the stages of forest succession." Oecologia 180, no. 3: 771-783.