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The effects of fertilization on the trait-abundance relationships in a Tibetan alpine meadow community

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Journal of Plant Ecology 2016年第2期9卷 144-152页

作者： Xiaolong Zhou Youshi Wang Pengfei Zhang Zhi Guo chengjin chu Guozhen Du State Key Laboratory of Grassland and Agro-ecosystems School of Life SciencesLanzhou University222 Tianshui RoadLanzhou 730000GansuPeople's Republic of China Ministry of Education Key Laboratory of Western China’s Environmental Systems Research School of Arid Environment and Climate ChangeLanzhou University222 Tianshui RoadLanzhou 730000GansuPeople'Republic of China SYSU-Alberta Joint Lab for Biodiversity Conservation State Key Laboratory of Biocontrol and School of Life SciencesSun Yat-sen University135 Xingang RoadGuangzhou 510275GuangdongPeople'Republic of China

Aims Comparisons of the trait-abundance relationships from various habitat types are critical for community ecology,which can offer us insights about the mechanisms underlying the local community assembly,such as the relative role of neutral *** processes in shaping community ***,we explored the responses of trait-abundance relationships to nitrogen(N),phosphorus(P)and potassium(K)fertilization in an alpine *** Five fertilization treatments(an unfertilized control and additions of N,P,K and NPK respectively)were implemented using randomized block design in an alpine Tibetan *** relative abundance(SRA),plant above-ground biomass and species richness were measured in each *** 24 common species,we measured species functional traits:saturated height,specific leaf area(SLA)and leaf dry matter content(LDMC)in each treatment but seed size only in the unfertilized *** major axis(SMA)regression and phylogenetically independent contrasts(PICs)analysis were used to analyse species trait-abundance relationships in response to different fertilization *** Findings Positive correlations between SRA and saturated height were raised following N,P and NPK fertilizations,which indicated an increase in light competition in these *** P fertilized plots,SRA was also positively correlated with LDMC because tall grasses with a nutrients conservation strategy often have a relative competitive advantage in capturing limited light and soil *** K fertilized plots,neither the trait-abundance relationships nor above-ground biomass or species richness significantly differed from that in the control,which suggests that K was not a limiting resource in our study *** significant correlations between species traits and relative abundance in fertilized treatment suggest that trait-based selection plays an important role in determining species abundance within local communities in alpine meadows.

关键词： community structure community assembly functional trait non-neutral process species relative abundance

Beyond direct neighbourhood effects: higher-order interactions improve modelling and predicting tree survival and growth

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National Science Review 2021年第5期8卷 38-47页

作者： Yuanzhi Li Margaret M.Mayfield Bin Wang Junli Xiao Kamil Kral David Janik Jan Holik chengjin chu Department of Ecology State Key Laboratory of BiocontrolSchool of Life SciencesSun Yat-sen University Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain Guangxi Institute of BotanyGuangxi Zhuang Autonomous Region and Chinese Academy of Sciences Department of Silviculture Faculty of Forestry and Wood TechnologyMendel University in Brno School of Biological Sciences The University of Queensland Department of Forest Ecology Silva Tarouca Research Institute

It is known that biotic interactions are the key to species coexistence and maintenance of species *** studies focus overwhelmingly on pairwise interactions between organisms, ignoring complex higher-order interactions(HOIs). In this study, we present a novel method of calculating individual-level HOIs for trees, and use this method to test the importance of size-and distance-dependent individual-level HOIs to tree performance in a 25-ha temperate forest dynamic plot. We found that full HOI-inclusive models improved our ability to model and predict the survival and growth of trees, providing empirical evidence that HOIs strongly influence tree performance in this temperate forest. Specifically, assessed HOIs mitigate the competitive direct effects of neighbours on survival and growth of focal trees. Our study lays a foundation for future investigations of the prevalence and relative importance of HOIs in global forests and their impact on species diversity.

关键词： pairwise interactions indirect interactions density-dependent size- and distance-dependent Zofin Forest Dynamic Plot

Global latitudinal patterns in leaf herbivory are related to variation in climate, rather than phytochemicals or mycorrhizal types

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National Science Review 2023年第12期10卷 66-69页

作者： Hui Tang Xianhui Zhu Yonglin Zhong Yuanzhi Li Wenqi Luo Hanlun Liu Patrice Descombes Alan C.Gange chengjin chu State Key Laboratory of Biocontrol School of Ecology/School of Life Sciences Sun Yat-sen University Guangdong Provincial Key Laboratory of Silviculture Protection and Utilization Guangdong Academy of Forestry Musée et Jardins botaniques cantonaux Department of Ecology and Evolution University of Lausanne Department of Biological Sciences Royal Holloway University of London

Plant-herbivore interactions are among the most important factors shaping plant community dynamics and ecosystem functioning. The latitudinal herbivory hypothesis proposed that insect herbivory rates decline with increasing latitudes owing to benign environmental conditions in the tropics, but studies have produced contradictory conclusions[1–3].

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Effects of traits,species identity and local environmental conditions on the assessment of interactions:insights from an alpine meadow community

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Journal of Plant Ecology 2009年第3期2卷 135-141页

作者： chengjin chu Youshi Wang Qi Li Luqiang Zhao Zhengwei Ren Sa Xiao Jianli Yuan Gang Wang MOE Key Laboratory of Arid and Grassland Ecology Lanzhou UniversityLanzhou 730000China MOE Key Laboratory of Western China’s Environmental System Lanzhou UniversityLanzhou 730000China

Aims The prediction that facilitation is the dominant interaction in physically stressful conditions has been supported by many but not all field *** the present paper,we tested the effects of the identity of species,the local environmental conditions and the currencies of performance measurement on such *** Using contrasting two plots,six species,and up to five multiple traits,we comprehensively explored the effects of the above factors on the assessment of plant interactions in an alpine meadow of the QingHai Tibetan ***,we attempted to figure out the possible mechanisms underlying the responses *** data were analysed by both standard ANOVAs and multivariate *** findings Our results demonstrated that the response to the removal of neighbours was both species and trait specific,and the effect of the ocal environmental conditions was dependent on the species *** contrast between plots had crucial influence on the net interactions of Kobresia macrantha,but little effect on Elymus *** the abiotic conditions,neighbours had significant impact on soil temperature,moist and solar *** results contribute to advance our knowledge on the potential underlying factors influencing the assessment of facilitation.

关键词： positive interactions species specific trait specific neighbour removal multivariate statistics PERMANOVA

Conceptual and theoretical dimensions of biodiversity research in China: examples from plants

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National Science Review 2021年第7期8卷 30-33页

作者： chengjin chu Lei Chen Pengfei Fan Ziwen He Yuanzhi Li Jinbao Liao Xubing Liu Kechang Niu Xingfeng Si Shaopeng Wang Xinqiang Xi State Key Laboratory of Biocontrol and School of Life Sciences Sun Yat-sen University Department of Ecology School of Life Sciences Nanjing University Zhejiang Tiantong Forest Ecosystem National Observation and Research Station School of Ecological and Environmental Sciences East China Normal University Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University

The search for the underlying mechanisms of species origin, maintenance and extinction is among the highest priorities in biodiversity science. In parallel with the rapid accumulation of empirical evidence for existin...

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Effects of resource additions on species richness and ANPP in an alpine meadow community

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Journal of Plant Ecology 2010年第1期3卷 25-31页

作者： Zhengwei Ren Qi Li chengjin chu Luqiang Zhao Jieqi Zhang Dexiecuo Ai Yingbo Yang Gang Wang MOE Key Laboratory of Arid and Grassland Ecology Lanzhou UniversityLanzhou 730000China

Aims Theories based on resource additions indicate that plant species richness is mainly determined by the number of limiting ***,the individual effects of various limiting resources on species richness and aboveground net primary productivity(ANPP)are less well ***,we analyzed potential linkages between additions of limiting resources,species loss and ANPP increase and further explored the underlying *** Resources(N,P,K and water)were added in a completely randomized block design to alpine meadow plots in the Qinghai-Tibetan *** aboveground biomass,species composition,mean plant height and light availability were measured in each *** and analysis of variance were used to analyze the responses of these measures to the different resource-addition *** Findings Species richness decreased with increasing number of added limiting resources,suggesting that plant diversity was apparently determined by the number of limiting *** was the most important limiting resource affecting species richness,whereas Pand K alone had negligible *** largest reduction in species richness occurred when all three elements were added in *** played a different role compared with the other limiting *** richness increased when water was added to the treatments with N and P or with N,P and *** decreases in species richness after resource additions were paralleled by increases in ANPP and decreases in light penetration into the plant canopy,suggesting that increased light competitionwas responsible for the negative effects of resource additions on plant species richness.

关键词： ANPP biodiversity resource additions species richness number of limiting resources

Positive interactions can produce species-rich communities and increase species turnover through time

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Journal of Plant Ecology 2012年第4期5卷 417-421页

作者： Youshi Wang M.D.Farnon Ellwood Fernando TMaestre Zhiyong Yang Gang Wang chengjin chu MOE Key Laboratory of Western China’s Environmental Systems Research School of Arid Environment and Climate ChangeLanzhou UniversityLanzhou 730000China Department of Zoology University of CambridgeDowning StreetCambridge CB23EJUK Area de Biodiversidad y Conservacion Departamento de Biología y GeologíaESCETUniversidad Rey Juan Carlosc/Tulipan s/n28933 MostolesSpain State Key Laboratory of Grassland Agro-ecosystems School of Life SciencesLanzhou UniversityLanzhou 730000China

Aims The process of facilitation,where a species increases the survival,growth,and fitness of another species,is becoming increasingly recognized as a critical factor in shaping the structure of plant *** process is particularly important in stressful *** few studies have attempted to incorporate positive interactions into community ecological theories such as the neutral theory of ***,we use an equalizing trade-off model as a foundation to study the potential impact of facilitation on species richness and community temporal *** Based on a spatially explicit birth–death trade-off model,we assume that the occurrence of facilitation is dependent on the presence of interspecific *** further propose that the realized birth rate for a given individual subject to facilitation is proportional to the number of interspecific neighbours within its ***,in our model,the individuals of rare species will benefit more from the existence of heterospecific individuals than common *** Findings As the facilitative coefficient increased,the species richness for simulated communities at the dynamically stochastic equilibrium was also *** also demonstrated that facilitation could increase the replacement of species through time:communities with facilitation become more dissimilar(*** smaller Bray–Curtis similarity values)than communities without or with a lower degree of facilitation after the same time *** from interspecific neighbours on rare species increased their population sizes and consequently made them less prone to extinction,thus enhancing species ***,in a saturated community,with the increase of species richness,mean population size of entire communities decreased,making species more prone to extinction on average,and thus increased the community temporal *** results suggest that future experimental work on the effect of

关键词： Bray–Curtis similarity index positive interactions species coexistence species temporal turnover

Using intraspecific variation of functional traits and environmental factors to understand the formation of nestedness patterns of a local forest community

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Journal of Plant Ecology 2022年第6期15卷 1185-1198页

作者： Weitao Wang Yun Jiang Yongfa Chen Wenqi Luo Dong He Youshi Wang chengjin chu Buhang Li State Key Laboratory of Biocontrol School of Life Sciences/School of EcologySun Yat-sen UniversityGuangzhou 510275China Zhuhai Branch of State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University at ZhuhaiZhuhai 519087China College of Resources and Environment Science Xinjiang UniversityUrumqi 830046China

The concept of nestedness originated from the field of biogeography decades ago and has been widely used in metacommunities and biological interaction networks,but there is still a lack of research within local ***,studies on nestedness usually rarely incorporate the functional traits of the species and the environmental characteristics of the *** this study,we constructed a species presence–absence matrix of a 50-ha forest plot,used the simulated annealing algorithm to reveal the maximum nested structure and further tested the significance of nestedness patterns by constructing null *** nested ranks were used to represent the orders of species and quadrats in the maximum nestedness *** regression tree analysis was used to reveal the relationships of nested ranks with environmental factors and functional *** found that the co-occurrence pattern of local plant communities was significantly *** regression tree results showed that the nested ranks of quadrats were determined by soil available phosphorus,soil water content,soil organic carbon and soil *** variation of functional traits,including leaf C,leaf pH,leaf dry matter content and maximum photosynthetic rate rather than means of functional traits,provided a better explanation for the formation of species’nested *** the causes of species and quadrats nested ranks provides novel lens and useful insights into ecological processes underlying nestedness,and further improves our knowledge of how local plant communities are assembled.

关键词： environmental factors functional traits nestedness spatial pattern subtropical forest

Species abundance is jointly determined by functional traits and negative density dependence in a subtropical forest in southern China

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Journal of Plant Ecology 2021年第3期14卷 491-503页

作者： Weitao Wang Yun Jiang Buhang Li Nianxun Xi Yongfa Chen Dong He Jiayi Feng chengjin chu Department of Ecology State Key Laboratory of BiocontrolSchool of Life SciencesSun Yat-sen UniversityGuangzhou 510275China School of Ecological and Environmental Sciences East China Normal UniversityShanghai 200241China

Aims The factors affecting species abundance are a subject of ongoing debates in community *** studies have demonstrated that tree abundance is affected by plant functional traits and negative density dependence(NDD).However,few studies have focused on the combined effects of NDD and plant functional traits on species *** In this study,we used tree functional traits and two census data from a 50-ha forest dynamic plot in the Heishiding(HSD)Nature Reserve to explore the combined effects of functional traits and NDD on species *** hierarchical Bayesian models,we analyzed how neighbor densities affected the survival of saplings from 130 species and extracted posterior means of the coefficients to represent *** structural equation modeling(SEM)analysis was then applied to investigate the causal relationships among species functional traits,NDD and species *** Findings SEM showed that tree functional traits,including specific leaf area(SLA),leaf area(LA),leaf dry matter content(LDMC),leaf N content(LNC),maximum electron transport rate(ETRmax)and conspecific adult negative density dependence(CNDDadult),together explained 20%of the total variation in tree ***,SLA affected tree abundance both directly and indirectly via CNDDadult,with a totally negative influence on *** and LNC had only indirect effects mediated by CNDDadult on tree *** and LA had directly negative effects on abundance,but their direct connections with CNDDaduIt were not *** addition,CNDDadult was negatively correlated with species abundance,indicating that abundant species are under stronger *** these investigated traits,SLA contributed the most to the variation in CNDDaduIt and *** argued that our findings of trait-CNDDadult-abundance relationships can improve our understanding of the determinants of species commonness and rarity in forests.

关键词： tree abundance negative density dependence functional traits common species rare species