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| 1 | Altered trends in carbon uptake in China’s terrestrial ecosystems under the enhanced summer monsoon and warming hiatus显示文摘The carbon budgets in terrestrial ecosystems in China are strongly coupled with climate changes.Over the past decade,China has experienced dramatic climate changes characterized by enhanced summer monsoon and decelerated warming.However,the changes in the trends of terrestrial net ecosystem production(NEP)in China under climate changes are not well documented.Here,we used three ecosystem models to simulate the spatiotemporal variations in China's NEP during 1982–2010 and quantify the contribution of the strengthened summer monsoon and warming hiatus to the NEP variations in four distinct climatic regions of the country.Our results revealed a decadal-scale shift in NEP from a downtrend of–5.95 Tg C/yr^2(reduced sink)during 1982–2000 to an uptrend of 14.22 Tg C/yr^2(enhanced sink)during 2000–10.This shift was essentially induced by the strengthened summer monsoon,which stimulated carbon uptake,and the warming hiatus,which lessened the decrease in the NEP trend.Compared to the contribution of 56.3%by the climate effect,atmospheric CO2 concentration and nitrogen deposition had relatively small contributions(8.6 and 11.3%,respectively)to the shift.In conclusion,within the context of the global-warming hiatus,the strengthening of the summer monsoon is a critical climate factor that enhances carbon uptake in China due to the asymmetric response of photosynthesis and respiration.Our study not only revealed the shift in ecosystem carbon sequestration in China in recent decades,but also provides some insight for understanding ecosystem carbon dynamics in other monsoonal areas. | Honglin He Shaoqiang Wang Li Zhang Junbang Wang Xiaoli Ren Lei Zhou Shilong Piao Hao Yan Weimin Ju Fengxue Gu Shiyong Yu Yuanhe Yang Miaomiao Wang Zhongen Niu Rcmg Ge Huimin Yan Mei Huang Guoyi Zhou Yongfei Bai Zongqiang Xie Zhiyao Tang Bingfang Wu Leiming Zhang Nianpeng He Qiufeng Wang Guirui Yu | 2019 | National Science Review2019，6，3： | 24 |
| 2 | Asymmetric competition for light varies across functional groups显示文摘Aims Asymmetric competition for light may depress the growth rates(GRs)to different extents for different-sized tree individuals.Various responses of different functional groups to light availability result that tree individuals of different functional groups may experience different competition intensities,e.g.canopy and deciduous species grow faster and demand more light than understory and evergreen species.In this study,we estimated the effects of asymmetric competition for light using individual GRs and explored the effects of asymmetric competition on growth among different functional groups(e.g.canopy vs.understory species and deciduous vs.evergreen species).Methods We measured growth in circumference to determine the radial increments of a total of 2233 stems with diameter at breast height≥5.0 cm in a permanent plot(140×80 m^(2))located in a typical evergreen and deciduous broadleaved mixed forest on Mt Shennongjia,China.All of the measurements were carried out at~6-month intervals every April and October from 2012 to 2014,and biomass of each individual was calculated based on its diameter and species-specific allometry.We then calculated GRs of annual biomass growth(growth between October and the next October).Considering the hypothesis that asymmetric competition for light among trees of different sizes may result in a steeper allometric growth curve with increasing tree size,we further divided the sampled trees into different subsets according to their height,at intervals of 1 m,and then fitted the scaling relationship between the logarithm of the biomass GR(logGR)and the logarithm of diameter(logD)for each height class using standardized major axis regression.Finally,we used simple linear regression to test whether the scaling exponent was related to tree height.The above analyses were conducted for the annual growth of all tree species,canopy species,understory vs.treelets species and deciduous vs.evergreen species.Important findings We observed a concave curve for the relationship between logGR and logD with an increase in the scaling exponent between logGR and logD with increasing tree height.This pattern held for the annual growth of canopy species and deciduous species but not for the annual growth of understory species,treelets or evergreen species.These results suggest that asymmetric competition for light is more important in regulating the GRs of the fast-growing species,such as canopy species and deciduous species,than those of shade-tolerant species,such as understory species,treelets and evergreen species. | Qiang Guo Xiulian Chi Zongqiang Xie Zhiyao Tang | 2017 | Journal of Plant Ecology2017，10，1： | 5 |
| 3 | C:N:P stoichiometry of Ericaceae species in shrubland biomes across Southern China:influences of climate,soil and species identity显示文摘Aims Carbon(C),nitrogen(N)and phosphorus(P)stoichiometry strongly affect functions and nutrient cycling within ecosystems.However,the related researches in shrubs were very limited.In this study,we aimed to inves-tigate leaf stoichiometry and its driving factors in shrubs,and whether stoichiometry significantly differs among closely related species.Methods We analyzed leaf C,N and P concentrations and their ratios in 32 species of Ericaceae from 161 sites across southern China.We examined the relationships of leaf stoichiometry with environmen-tal variables using linear regressions,and quantified the interactive and independent effects of climate,soil and species on foliar stoi-chiometry using general linear models(GLM).Important Findings The foliar C,N and P contents of Ericaceae were 484.66,14.44 and 1.06 mg g−1,respectively.Leaf C,N and P concentrations and their ratios in Ericaceae were significantly related with latitude and altitude,except the N:P insignificantly correlated with latitude.Climate(mean annual temperature and precipitation)and soil properties(soil C,N and P and bulk density)were significantly influenced element stoichiom-etry.The GLM analysis showed that soil exerted a greater direct effect on leaf stoichiometry than climate did,and climate affected leaf traits mainly via indirect ways.Further,soil properties had stronger influ-ences on leaf P than on leaf C and N.Among all independent factors examined,we found species accounted for the largest proportion of the variation in foliar stoichiometry.These results suggest that species can largely influence foliar stoichiometry,even at a lower taxonomic level. | Qiang Zhang Qing Liu Huajun Yin Chunzhang Zhao Lin Zhang Guoying Zhou Chunying Yin Zhijun Lu Gaoming Xiong Yuelin Li Jiaxiang Li Wenting Xu Zhiyao Tang Zongqiang Xie | 2019 | Journal of Plant Ecology2019，12，2： | 4 |
| 4 | Two Ultraviolet Radiation Datasets that Cover China显示文摘Ultraviolet(UV) radiation has significant effects on ecosystems, environments, and human health, as well as atmospheric processes and climate change. Two ultraviolet radiation datasets are described in this paper. One contains hourly observations of UV radiation measured at 40 Chinese Ecosystem Research Network stations from 2005 to 2015. CUV3 broadband radiometers were used to observe the UV radiation, with an accuracy of 5%, which meets the World Meteorology Organization's measurement standards. The extremum method was used to control the quality of the measured datasets. The other dataset contains daily cumulative UV radiation estimates that were calculated using an all-sky estimation model combined with a hybrid model. The reconstructed daily UV radiation data span from 1961 to 2014. The mean absolute bias error and root-mean-square error are smaller than 30% at most stations, and most of the mean bias error values are negative, which indicates underestimation of the UV radiation intensity. These datasets can improve our basic knowledge of the spatial and temporal variations in UV radiation. Additionally, these datasets can be used in studies of potential ozone formation and atmospheric oxidation, as well as simulations of ecological processes. | Hui LIU Bo HU Yuesi WANG Guangren LIU Liqin TANG Dongsheng JI Yongfei BAI Weikai BAO Xin CHEN Yunming CHEN Weixin DING Xiaozeng HAN Fei HE Hui HUANG Zhenying HUANG Xinrong LI Yan LI Wenzhao LIU Luxiang LIN Zhu OUYANG Boqiang QIN Weijun SHEN Yanjun SHEN Hongxin SU Changchun SONG Bo SUN Song SUN Anzhi WANG Genxu WANG Huimin WANG Silong WANG Youshao WANG Wenxue WEI Ping XIE Zongqiang XIE Xiaoyuan YAN Fanjiang ZENG Fawei ZHANG Yangjian ZHANG Yiping ZHANG Chengyi ZHAO Wenzhi ZHAO Xueyong ZHAO Guoyi ZHOU Bo ZHU | 2017 | Advances in Atmospheric Sciences2017，34，7： | 2 |
| 5 | Preparation and characterization of fluorinated poly(aryl ether oxadiazole)s anion exchange membranes based on imidazolium salts显示文摘 | Qunhui Hu Yuming Shang Yaowu Wang Min Xu Shubo Wang Xiaofeng Xie Yonggang Liu Hailiang Zhang Jinhai Wang Zongqiang Mao | 2012 | International Journal of Hydrogen Energy2012，，17： | 1 |
| 6 | Synthesis and characterization of anion exchange membranes for alkaline direct methanol fuel cells显示文摘 | Guoshun Liu Yuming Shang Xiaofeng Xie Shubo Wang Jinhai Wang Yaowu Wang Zongqiang Mao | 2011 | International Journal of Hydrogen Energy2011，，1： | 1 |
| 7 | Impacts of large dams on riparian vegetation: applying global experience to the case of China’s Three Gorges Dam显示文摘 | Thomas New Zongqiang Xie | | 0，2008，： | 1 |
| 8 | Distribution of shrublands in relation to soil and climate in mid-subtropical China显示文摘Aims Understanding relationships between vegetation and environments is of importance for ecosystem restoration and management.However,information on how environments influence the floristic patterns of shrublands is lack,especially in the subtropical China.In this study,we explored how environments regulate species composition of shrublands at landscape scale in mid-subtropical China.Methods We investigated species composition and measured the climate and soil environments for 207 shrubland plots in mid-subtropical China(24°39′-30°08′N,108°47′-114°15′E).We applied a hierarchical cluster analysis and indicator species analysis based on the Bray-Curtis similarity index to identify the main shrubland types and employed principal coordinate analysis(PCoA)to explore the relationship between floristic composition and environment.Important Findings We identified four shrubland types occurring in different environmental conditions.Montane shrubland,dominated by species suitable for cool climates(e.g.Rhododendron simsii),were distributed in steep areas at comparatively high altitudes;foothill shrubland,dominated by mesophilous species(e.g.Loropetalum chinense),were distributed in low mountains and hills;pioneer shrubland,dominated by fast grow and short-life cycles species(e.g.Rhus chinensis),were distributed at low altitudes with dense population;and finally,limestone shrubland,dominated by calcicole plants(e.g.Coriaria nepalensis),were distributed in the extensive karst areas.Communities occurring in high pH soils were completely separated from those in low pH soils according to the hierarchical cluster analysis.PCoA ordination associated the four types with distinct edaphic and climatic gradients.Soil pH explained 63.3%of variation in PCoA,followed by soil depth and soil bulk density. | Jiaxiang Li Gaoming Xiong Wenting Xu Zongqiang Xie | 2016 | Journal of Plant Ecology2016，9，4： | 1 |
| 9 | Reproductive allocation, seed dispersal and germination of Myricaria laxiflora, an endangered species in the Three Gorges Reservoir area显示文摘 | Chen Fangqing Xie Zongqiang | 2007 | Plant Ecology2007，191，： | 1 |
| 10 | Impacts of large dams on riparian vegetation: applying global experience to the case of China’s Three Gorges Dam显示文摘 | Thomas New Zongqiang Xie | | Biodiversity and Conservation0，，： | 1 |
| 11 | Impacts of large dams on riparian vegetation: applying global experience to the case of China's Three Gorges Dam显示文摘 | NEW T XIE Zongqiang | 2008 | Biodiversity and Conservation2008，17，13： | 1 |
| 12 | Preparation and characterization of fluorinated poly(aryl ether oxadiazole)s anion exchange membranes based on imidazolium salts显示文摘 | Qunhui Hu Yuming Shang Yaowu Wang Min Xu Shubo Wang Xiaofeng Xie Yonggang Liu Hailiang Zhang Jinhai Wang Zongqiang Mao | 2012 | International Journal of Hydrogen Energy2012，，17： | 1 |
| 13 | yunnansheng xianggelila daxiagu zangzu shenshan zai ziran baohu zhong de yiyi(The Natural Protection Meaning of Tibetan Sacred Mountains in the Great Gorge of Shangri-la,Yunnan)显示文摘 | Zhou Li Xie Zongqiang Ou Xiaokun | | 0，，01： | 1 |
| 14 | Synthesis and characterization of anion exchange membranes for alkaline direct methanol fuel cells显示文摘 | Guoshun Liu Yuming Shang Xiaofeng Xie Shubo Wang Jinhai Wang Yaowu Wang Zongqiang Mao | 2011 | International Journal of Hydrogen Energy2011，，1： | 1 |
| 15 | Correlated observations linking loss of energetic protons to EMIC waves显示文摘Electromagnetic ion cyclotron(EMIC)emission is an efficient mechanism for scattering loss of energetic protons.Here,we report an event that provides both in-situ observation of energetic proton differential fluxes in the inner magnetosphere and precipitation of protons at ionospheric altitudes.During the 7-8 September 2015 geomagnetic storm the Van Allen Probes observed strong EMIC waves around L=5 and a distinct decrement in fluxes of tens of keV protons around pitch angles 0°-45°.Meanwhile,precipitating protons at ionospheric altitudes were found to significantly enhanced(by several orders of magnitude),measured by NOAA 18 and 19 when they magnetically linked to the Van Allen Probe-A.By solving the Fokker-Planck diffusion equation,we show that EMIC waves can efficiently produce loss of energetic protons within about 2 h in the pitch angle range of~0°-45°,comparable to the satellite observations. | YANG Chang WANG ZongQiang XIAO FuLiang HE ZhaoGuo XIE YanQiong ZHANG Sai HE YiHua LIU Si ZHOU QingHua | 2022 | Science China(Technological Sciences)2022，65，1： | 0 |
| 16 | Strong restrictions on the trait range of co-occurring species in the newly created riparian zone of the three Gorges Reservoir Area, china显示文摘Aims community assembly links plant traits to particular environmental conditions.Numerous studies have adopted a trait-based approach to understand both community assembly processes and changes in plant functional traits along environmental gradients.In most cases these are long-established,natural or semi-natural environments.However,increasingly human activity has created,and continues to create,a range of new environmental conditions,and under-standing community assembly in these‘novel environments’will be increasingly important.Methods Built in 2006,the three Gorges Dam,largest hydraulic project in china,created a new riparian area of 384 km^(2),with massively al-tered hydrology.this large,newly created ecosystem is an ideal platform for understanding community assembly in a novel environment.We sampled environment variables and plant communities within 103 plots located in both the reservoir riparian zone(RRZ)and adjacent non-flooded and semi-natural upland(Upland)at the three Gorges Reservoir Area.We measured six traits from 168 plant species in order to calculate community-level distribution of trait values.We expected that the altered hydrology in RRZ would have a profound effect on the community assembly process for the local plants.Important Findingsconsistent with previous work on community assembly,the dis-tribution of trait values(range,variance,kurtosis and the standard deviation of the distribution neighbor distances)within all plots was significantly lower than those from random distributions,indicat-ing that both habitat filtering and limiting similarity simultaneously shaped the distributions of traits and the assembly of plant commu-nities.considering the newly created RRZ relative to nearby sites,community assembly was different in two main ways.First,there was a large shift in the mean trait values.compared to Upland commu-nities,plant communities in the RRZ had higher mean specific leaf area(SLA),higher nitrogen per unit leaf mass(Nmass),and lower max-imum height(MH).Second,in the RRZ compared to the Upland,for the percentage of individual plots whose characteristic of trait values was lower than null distributions,the reductions in the community-level range for SLA,Nmass,nitrogen per unit leaf area(Narea)and phos-phorus per unit leaf area(Parea)were much larger,suggesting that the habitat filter in this newly created riparian zone was much stronger compared to longer established semi-natural upland vegetation.this stronger filter,and the restriction to a subset of plants with very similar trait values,has implications for predicting riparian ecosystems’responses to the hydrological alterations and further understanding for human’s effect on plant diversity and plant floras. | Aiying Zhang Will Cornwell Zhaojia Li Gaoming Xiong Dayong Fan Zongqiang Xie | 2019 | Journal of Plant Ecology2019，12，5： | 0 |
| 17 | The Impact of the Three Gorges Hydroelectric Project on and the Preservation Strategies for the Biodiversity in the Affected Region显示文摘 | HE JINSHENG XIE ZONGQIANG | 1995 | 生物多样性1995，3，B06： | 0 |
| 18 | The Two-dimensional Time Coordinate System and Time Prediction Research of M≥6.7 Strong Earthquakes in the Sichuan-Yunnan Region显示文摘Since the 20 thcentury,the time intervals of M ≥6.7 strong earthquakes in the SichuanYunnan region show obvious regularity.Using the years of the strong events,a twodimensional time coordinate system is generated,based on which,the time prediction model is constructed for strong earthquakes in the Sichuan-Yunnan region.Prediction analysis shows that there is risk of generating four earthquakes with M ≥ 6.7 in the Sichuan-Yunnan region in the future 16 years,and there are strong signals for M ≥6.7earthquakes for periods 2012-2021 and 2025-2029.The strong earthquakes may occur around 2014-2015,2019 and 2027. | Sun Zongqiang Xie Xiaojing Gao Huayan Wang Yongmei Fang Yanxun Wang Bin Yao Yuxia Cao Xiaoli Wu Yanfang | 2015 | Earthquake Research in China2015，29，1： | 0 |
| 19 | Structures and topographical pattern of the tree layer of Fagus engleriana-Cyclobalanopsis oxyodon community in Shennongjia area, Hubei Province, China显示文摘Shennongjia represents an area of considerable plant biodiversity,not only for China but for the whole world.The numerous species are distributed along an altitude gradient.The genus Fagus,commonly known as Beeches,constitutes one of the dominant woody species of the humid temperate forests in China.This paper deals with the community structure of a mixed,broadleaved deciduous-evergreen beech forest dominated by the Fagus engleriana and Cyclobalanopsis oxyodon,which occurs along an altitude gradient range in this area.The community consists of 46 woody species,belonging to 22 families and 27 genera.The tree layer can be divided into three sub-strata.The upper layer is composed of deciduous trees,80.7%of which is F.engleriana.The second and third layers are dominated by the evergreen species,such as C.oxyodon and the Rhododendron hypoglaucum.These species increase from 55.9%in the second layer to 80.5%in the third,and regeneration at that rate allows us to assume that the stability of the community may be guaranteed.The micro-site heterogeneity plays an important role in maintaining species diversity in plant communities.In this research,a terrain surface of 0.96hm 2 was simulated using the digital elevation model(DEM)in order to analyze the influence of the topography on plant community structures on a small scale.The slope relief aspect obtained with the DEM showed an accentuated heterogeneity.Semivariance analysis was used to measure the heterogeneity scale.The range and nugget variance of the semivariograms for slope were 285.8 and 280.5,respectively;for aspect,were 21.8 and 498,respectively.The elevated value of the nugget variance suggested that even on a small scale,the topographic variations influenced the species distribution.Twenty-four species were selected to estimate the correlation coefficient between the slope,aspect,and orientation.Then based on the correlation results using the Square Euclidean Distance cluster analysis,the 24 species were divided into four groups. | Mi ZHANG Zongqiang XIE Gaoming XIONG Dayong FAN | 2009 | Frontiers in Biology2009，4，4： | 0 |
| 20 | The Janzen-Connell effect on the population dynamics of a Fagus engleriana- Cyclobalanopsis oxyodon community in a subtropical zone of China显示文摘The Janzen-Connell(J-C)hypothesis provides a mechanism explaining the high species diversity in tropical rainforests.It postulates that predation could cause greater mortality on seeds and seedlings near their parental trees.In this study,we tested the hypothesis in a subtropical zone,a mixed evergreen-deciduous broad-leaved forest dominated by the Fagus engleriana and Cyclobalanopsis oxyodon.The study area was in the Shennongjia region,a key area of biodiversity conserva-tion in both China and the world.The recruitment probability index was used to detect the J-C effect on nine species of the community,which were more than 50 individuals.Six large adults of each species were selected,and the numbers of saplings and adults were counted at the distance intervals of 0–5,5–10,10–15,15–20,and 20–25m from each focal tree.Two species in saplings stage and six in adult stage supported the J-C hypothesis,but theirχ2 was not significant.Three species,the F.engleri-ana,Rhododendron hypoglaucum,and Toona sinensis,showed a strong Hubbell pattern in the adult stage.Because of these results,we reject the J-C hypothesis and conclude that species could recruit near the conspecific trees in subtropical forest.The reasons why the J-C hypothesis fails to explain the species diversity in this community are the shortage of seed-consuming agents of subtropical forest and the influence of microsite topo-graphic variation. | Mi ZHANG Gaoming XIONG Zhigang CHEN Zongqiang XIE | 2009 | Frontiers in Biology2009，4，4： | 0 |
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