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The Crested Ibises expanding to plain areas exhibit a higher tolerance of human proximity

Avian Research 2024年第1期15卷 60-65页

作者： Yuqi Zou Yiting Jiang Zitan Song Xiaobin Fang changqing ding School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing100083China Department of Biology University of KonstanzKonstanz78464Germany Center for the Advanced Study of Collective Behavior University of KonstanzKonstanz78464Germany School of Life Sciences Liaoning UniversityShenyang110036China Comparative Socioecology Group Max Planck Institute for Animal BehaviorKonstanz78467Germany

Animals must strike a balance between anti-predation behavior and other essential behaviors,such as *** the same species,strategies may vary on individuals’risk-taking preferences,and in this process the environment is a determinant,in addition to predator *** Crested Ibis(Nipponia nippon)exhibits such *** is an endangered species,once inhabiting exclusively in China’s Qinling *** used to be the sole remaining wild ***,over recent decades,this population has expanded.A portion has relocated to breed in the lower plain area,which is characterized by elevated level of human activities and landscape *** used flight initiation distance(FID)as an indicator of the ibises’risk-taking preference,particularly their response to human ***,we examined the environmental factors influencing their foraging site selection,including altitude,terrain openness,human activity intensity and human *** findings revealed a significantly shorter FID among individuals relocating to plain habitats,indicating a higher tolerance of human *** results showed that FID decreased with distance to the nearest human *** finding is that FID was independent of instant human activity intensity and environmental factors(altitude and terrain openness).These different may arise from various combinations of human activity,predation risk,and food abundance within the two *** results provide insights into the in situ conservation of the threatened species within the context of global urbanization.

关键词： Anti-predation behavior Flight initiation distance Habitat expansion Human activity Nipponia nippon

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Using stable isotope to compare the habitat use and trophie level between the new and old breeding range of wild Crested Ibis in the early breeding season

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Avian Research 2022年第2期13卷 202-207页

作者： Xianglong Xu Jiahu Jiang Yu Lei Chao Wang Baoping Qing changqing ding School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing100083China Shaanxi Hanzhong Crested Ibis National Nature Reserve YangxianShaanxi723300China

The concept of foraging niche provides an insight into habitat use and dietary information of *** intraspecific variation in foraging niche and trophic level is critical to the understanding of the species response to environmental changes during the process of range expansion,as well as the habitat management for conservation of threatened *** stable isotopic values of eggshell membranes(δ;C andδ;N),we examined whether there are differences in habitat use,trophic level,foraging niche width between the new and old breeding habitats(plains ***)of wild Crested Ibis(Nipponia nippon)in the early breeding *** Ibis exhibited high variability in bothδ;C andδ;N values,δ;C andδ;N varied as a function of habitat *** breeding in plains had significantly higherδ;C but lowerδ;N values compared to the birds breeding in ***δ;N suggested that individuals in mountains consumed a great proportion of higher trophic level prey species in the early breeding ***,the isotopic niches were distinctly different in positions and showed small overlap between the two habitat *** niche width was wider in old habitat than in the expanded new *** results demonstrated that the wild Crested Ibis had a high intraspecific variation in habitat uses and trophic levels in the early breeding season,and they could be divided into mountain and plain groups based on their different foraging *** difference inδ;N and niche width revealed that high trophic level food resources might be insufficient in *** findings stressed the importance of protecting foraging grounds in mountains and the necessity of improving foraging grounds in plains during winter and *** study highlights the feasibility of investigating intraspecific variation in foraging ecology of birds through non-invasive isotopes of eggshell *** foraging niche variation gives us an insight into the food resource diversity

关键词： Diet breadth Eggshell membranes Foraging niche Intraspecific variation Nipponia nippon Non-invasive Range expansion

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Linking the past and present to predict the distribution of Asian crested ibis(Nipponia nippon)under global changes

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Integrative Zoology 2022年第6期17卷 1095-1105页

作者： Fangyuan YU Yiwen SUN Tiejun WANG Andrew KSKIDMORE changqing ding Xinping YE School of Geographical Sciences and Remote Sensing Guangzhou UniversityGuangzhouChina Department of Natural Resources Faculty of Geo-Information Science and Earth ObservationUniversity of TwenteEnschedeThe Netherlands Department of Environmental Science New South WalesMacquarie UniversityMacquarieAustralia College of Nature Conservation Beijing Forestry UniversityBeijingChina College of Life Sciences Shaanxi Normal UniversityXi’anChina

Understanding how species’ecological niches adapt to environmental changes through time is critical for predicting the effect of future global change on endangered *** few studies have incorporated knowledge of past niche shifting into the assessment of species’future fate in a changing *** this study,we integrated the ecological niche dynamics into the species distribution modeling of the Asian crested ibis(Nipponia nippon)in East ***ﬁcally,we compared historical and present ecological niches of crested ibis in four-dimensional environmental space based on species occurrence and environmental *** then employed a multi-temporal ecological niche model to estimate the potential geographical distribution of crested ibis under future climate and land-use *** results show that crested ibis retained similar though not identical ecological niches over *** to the historical baseline range,the current suitable habitat for crested ibis has been reduced by 39.6%.The effects of human activity outweigh those of climate change regarding the distribution of crested *** conclude that the ecological niche of crested ibis was tended to be conservative,and future potentially suitable habitat may encounter northeastward and northwestward shift,and possibly expand by 18.7%referred to the historical ***ﬁndings of our study are of clear importance for the conservation and successful reintroduction of crested ibis in East Asia.

关键词： biogeography climate change ecological niche land-use change niche conservatism

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ON THE EMPTY CONVEX PARTITION OF A FINITE SET IN THE PLANE

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Chinese Annals of Mathematics,Series B 2002年第4期23卷 487-494页

作者： XU changqing ding RENDepartment of Mathematics, Hebei Normal University, Shijiazhuang 050016, China. Department of Mathematics Hebei Normal University Shijiazhuang 050016 China

The authors discuss the partition of a finite set of points in the plane into empty convex polygons, and improve some upper bound and lower bound in the related enumeration problems.

关键词： Partition Disjoint partition Empty partition

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Three-dimensional niche partitioning between two colonially nesting ardeid species in central China

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Avian Research 2021年第3期12卷 338-345页

作者： Yuanxing Ye Canshi Hu Yiting Jiang Geoffrey W.H.Davison changqing ding School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China College of Life Science Guizhou UniversityGui-yang 550025China Department of Life Science Liaoning UniversityShenyang 110036China National Biodiversity Centre National Parks BoardSingapore 259569Singapore

Background:Interspecific competition is known to be strongest between those species that are both closely related and *** are colonially nesting wetland birds that often overlap and can therefore be expected to compete in roosting and nesting habitat as well as in *** to the niche partitioning hypothesis,it is to be expected that these similar species would show differentiation in at least one of the main niche dimensions to reduce *** tested niche partitioning between the colonially nesting Little Egret(Egretta garzetta)and Cattle Egret(Bubulcus ibis)in temporal,spatial and trophic ***:Field study was conducted in three mixed egret colonies in Yangxian County,southwest Shaanxi Prov-ince,central *** each nest colony we recorded its spatial location,the height of nesting trees and of nests,the height of roosting trees and of roosting individuals within the *** determined the first egg-laying and first hatching dates of the two *** dissection of storm-killed egret nestlings was used to measure the *** transects were surveyed to study foraging habitat ***:We found that hatching time of Little Egrets peaked earlier(by about 1 month)than that of Cattle *** Egrets nested and roosted higher than Little *** foraging habitats used by Little Egrets were dominated by river banks(73.49%),followed by paddy fields(13.25%)and reservoirs(10.84%),whereas Cattle Egret foraging sites were characterized by grasslands(44.44%),paddy fields(33.33%)and river banks(22.22%).Little Egrets consumed more fishes(65.66%)and Odonata larvae(13.69%)than Cattle Egrets,while Cattle Egrets were found feeding mainly on Coleoptera(29.69%)and Orthoptera(23.29%).Little Egrets preyed on larger mean biomasses of food items than Cattle ***:Our results confirm the niche partitioning hypothesis as a mechanism for coexistence among ecologi-cally similar *** two coexisting egret species,

关键词： Bubulcus ibis Egretta garzetta Interspecific competition Niche partition Sympatric species

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Chinese Science Bulletin 2001年第8期46卷 669-671页

作者： LI Ming ding changqing WEI Fuwen MENG Shijie XI Yongmei LU Baozhong Institute of Zoology Chinese Academy of SciencesBeijing 100080China Department of Biology Northwest UniversityXi’an 710060China Shaanxi Crested Ibis Conservation Station Yangxian 723300China

The Crested Ibis (Nipponia nippon) is a critical endangered species of the world. At present, a reintroduction program will be conducted to save this species essentially. However, because the Crested Ibise is a sexual alike bird, it is very difficult to identify the sex from the morphological character. In order to identify the sex easily and select the right individuals for captive breeding and reintroduction, the sex related gene on W chromosome was amplified and the sex of three Crested Ibises were also identified in the present study. The 262bp fragment was also sequenced, and we found that there were 13 different nucleotide sites with 2.25 of transition/transversion based on the comparison with that of the Oriental White Stork. The sequence will also provide a theoretic base for further designing specific primer for sex related gene in the Crested Ibis.

关键词： Crested Ibis Nipponia nippon sex-related gene sex identification.

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Species distribution modeling in regions of high need and limited data： waterfowl of China

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Avian Research 2018年第1期9卷 49-62页

作者： Diann J.Prosser changqing ding R.Michael Erwin Taej Mundkur Jeffery D.Sullivan Erle C.Ellis Patuxent Wildlife Research Center U.S. Geological Survey Beltsville MD 20705 USA University of Maryland College Park MD 20742 USA College of Nature Conservation Beijing Forestry University Beijing 100083 China University of Virginia Charlottesville VA 22904 USA Wetlands International Horapark9 Ede 6717 LZ The Netherlands Natural Systems Analysts Winter Park FL 32789 USA Department of Geography and Environmental Systems University of Maryland Baltimore County Baltimore MD 21250 USA

Background: A number of conservation and societal issues require understanding how species are distributed on the landscape, yet ecologists are often faced with a lack of data to develop models at the resolution and extent desired, resulting in inefficient use of conservation *** a situation presented itself in our attempt to develop waterfowl distribution models as part of a multi-disciplinary team targeting the control of the highly pathogenic H5N1 avian influenza virus in ***: Faced with limited data, we built species distribution models using a habitat suitability approach for China's breeding and non-breeding(hereafter, wintering) *** extensive review of the literature was used to determine model parameters for habitat *** relationships were implemented in GIS using land cover *** models were validated using waterfowl census data, while breeding models, though developed for many species, were only validated for the one species with sufficient telemetry data ***: We developed suitability models for 42 waterfowl species(30 breeding and 39 wintering) at 1 km resolution for the extent of China, along with cumulative and genus level species richness *** season models showed highest waterfowl suitability in wetlands of the high-elevation west-central plateau and northeastern *** waterfowl suitability was highest in the lowland regions of southeastern *** measures indicated strong performance in predicting species *** our model outputs to China's protected areas indicated that breeding habitat was generally better covered than wintering habitat, and identified locations for which additional research and protection should be ***: These suitability models are the first available for many of China's waterfowl species, and have direct utility to conservation and habitat planning and prioritizing management of critically important

关键词： Anatidae Avian influenza China Habitat suitability H5N1 Spatial analysis Species distribution models Waterfowl

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Transcriptional analysis and histochemistry reveal that hypersensitive cell death and H2O2 have crucial roles in the resistance of tea plant (Camellia sinensis (L.) O. Kuntze) to anthracnose

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Horticulture Research 2018年第1期5卷 724-736页

作者： Yuchun Wang Xinyuan Hao Qinhua Lu Lu Wang Wenjun Qian Nana Li changqing ding Xinchao Wang Yajun Yang Tea Research Institute Chinese Academy of Agricultural Sciences/National Center for Tea Improvement/Key Laboratory of Tea Biology and Resources UtilizationMinistry of AgricultureHangzhou310008People’s Republic of China

Anthracnose causes severe losses of tea production in *** genes and biological processes involved in anthracnose resistance have been reported in other plants,the molecular response to anthracnose in tea plant is *** used the susceptible tea cultivar Longjing 43 and the resistant cultivar Zhongcha 108 as materials and compared transcriptome changes in the leaves of both cultivars following Colletotrichum fructicola *** all,9015 and 8624 genes were differentially expressed between the resistant and susceptible cultivars and their controls(0 h),*** both cultivars,the differentially expressed genes(DEGs)were enriched in 215 pathways,including responses to sugar metabolism,phytohormones,reactive oxygen species(ROS),biotic stimuli and signalling,transmembrane transporter activity,protease activity and signalling receptor activity,but DEG expression levels were higher in Zhongcha 108 than in Longjing ***,functional enrichment analysis of the DEGs showed that hydrogen peroxide(H2O2)metabolism,cell death,secondary metabolism,and carbohydrate metabolism are involved in the defence of Zhongcha 108,and 88 key genes were ***–protein interaction(PPI)network demonstrated that putative mitogen-activated protein kinase(MAPK)cascades are activated by resistance(R)genes and mediate downstream defence *** analysis subsequently validated the strong hypersensitive response(HR)and H2O2 accumulation that occurred around the hyphal infection sites in Zhongcha ***,our results indicate that the HR and H2O2 are critical mechanisms in tea plant defence against anthracnose and may be activated by R genes via MAPK cascades.

关键词： metabolism resistance analysis

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iTRAQ-based quantitative proteomic analysis of tea plant(Camellia sinensis(L.)***)during cold acclimation and de-acclimation procedures

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Beverage Plant Research 2023年第1期3卷 137-150页

作者： changqing ding Xinyuan Hao Lu Wang Nana Li Jianyan Huang Jianming Zeng Yajun Yang Xinchao Wang National Center for Tea Plant Improvement Key Laboratory of BiologyGenetics and Breeding of Special Economic Animals and PlantsMinistry of Agriculture and Rural AffairsTea Research InstituteChinese Academy of Agricultural SciencesHangzhou 310008PR China

To gain a better understanding on the mechanism of cold acclimation in tea plant[Camellia sinensis(L.)***]at the proteome level,an iTRAQ based quantitative proteome analysis was carried out to identify differentially accumulated proteins in the mature leaves which were collected at non-acclimated(NA),fully acclimated(CA)and de-acclimated(DA)stages.407 and 477 proteins identified from CA and DA showed significant abundance changes(at 95%confidence)compared with NA,***,251 protein species changed their abundance in DA compared with *** differential abundance protein species were mainly involved in metabolism,cell wall,photosynthesis,energy,protein synthesis,antioxidation,carbohydrate metabolic process and binding,and mapped to the pathways of biosynthesis of secondary metabolites,microbial metabolism in diverse environment,ribosome,metabolic pathway,sugar metabolism,protein processing,photosynthesis,and plant-pathogen interaction ***,no significant correlation was detected between the identified proteins and cognate gene transcript levels by correlation analysis and qRT-PCR *** study presents a comprehensive proteome in mature leaves at different cold acclimation status and provides new insights into cold acclimation mechanisms in tea plants.

关键词： metabolism analysis sugar

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Molecular characterization of H3N2 and H4N6 subtypes avian influenza viruses isolated from mallards in Poyang Lake,China in 2010

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Chinese Science Bulletin 2012年第27期57卷 3586-3594页

作者： ZHU Na ZHAO JiuRu LI YongDong ding changqing XIA Han TANG Shuang ZHANG Zhong YU JingFeng CHEN Jing FAN ZhaoJun KOU Zheng LI TianXian State Key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of SciencesWuhan 430071China Ningbo Municipal Center for Disease Control and Prevention Ningbo 315010China College of Biology Beijing Forestry University Beijing 100083China

Poyang Lake is the largest inland freshwater lake in China and contains many species of wild birds and *** conducted a survey of avian influenza viruses in nine semi-artificial waterfowl farms in Poyang Lake during January to March of *** of 1036 cloacal swabs collected,three H3N2 and one H4N6 influenza viruses were isolated from healthy *** the isolates were genetically and phylogenetically *** analysis of putative HA cleavage sites showed that all the four isolates possessed the molecular characteristics(QTRGL for H3N2 viruses,PEKASR for H4N6 virus) of lowly pathogenic avian influenza(LPAI) *** phylogenetic analysis of the viral genomes showed that all four virus isolates clustered in the Eurasian clade of influenza *** M gene of the viruses possessed the highest homology with highly pathogenic H5N1 influenza *** addition,co-infection of H3N2 and H4N6 in the same farm was *** interestingly,we isolated two subtypes viruses(H3N2 and H4N6) and their progeny virus(H3N2) with evidence of genome reassortment from the same farm,in which the PB1 and PB2 gene segments of H4N6 replaced those of the H3N2 *** results of animal infection experiments showed that all the four isolated viruses were lowly pathogenic to chickens and not pathogenic to mice,which was consistent with the results of genetic analysis.

关键词：禽流感病毒病毒分离分子特征鄱阳湖野鸭亚型中国系统发育分析

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