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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 | Land-use impact on soil carbon and nitrogen sequestration in typical steppe ecosystems, Inner Mongolia显示文摘在内部蒙古的草地为土壤碳(C) 隐遁探索最佳的陆地使用,我们在使遭到了到不同陆地使用类型的 8 个花地并且地形的类似的地点在土壤和土壤部分调查了 C 和氮(N) 存储(免费放牧的、放牧排除,刈草,放牧的冬季,和开垦) 。与免费放牧的草地相比,在 0-50 厘米层的 C 和 N 存储增加了18.3%( 15.5 Mg C ha1 )并且9.3%( 0.8 Mg N ha1 )在以后擦伤排除10年,分别地并且21.9%( 18.5 Mg C ha1 )并且11.5%( 0.9 Mg N ha1 )在30年的放牧排除以后分别地。同样,玷污 15.3% 增加的 C 和 N 存储(12.9 Mg C ha1 ) 并且 10.2%(0.8 Mg N ha1 ) 在 10 年的刈草以后,分别地并且 19.2%(16.2 Mg C ha1 ) 并且 7.1%(0.6 Mg N ha1 ) 在分别地的 26 年的刈草以后。相反,土壤 C 和 N 存储在 10.6% 衰退了(9.0 Mg C ha1 ) 并且 11.4%(0.9 Mg N ha1 ) 在 49 年的开垦以后分别地。而且, C 和 N 存储的增加主要与擦伤排除并且刈草在 0-10 厘米土壤层发生在沙和淤泥部分。我们的调查结果提供了内部蒙古的草地有能力扣押的证据在有改进管理的土壤的 C 和 N 练习,它在顺序:放牧排除 > 刈草 > 冬季放牧 > 开垦。 | HE Nianpeng ZHANG Yunhai DAI Jingzhong HAN Xingguo BAOYIN Taogetao YU Guirui | 2012 | Journal of Geographical Sciences2012，22，5： | 19 |
| 3 | Effects of Temperature and Moisture on Soil Organic Matter Decomposition Along Elevation Gradients on the Changbai Mountains, Northeast China显示文摘Decomposition of soil organic matter(SOM) is of importance for CO_2 exchange between soil and atmosphere and soil temperature and moisture are considered as two important factors controlling SOM decomposition. In this study, soil samples were collected at 5 elevations ranging from 753 to 2 357 m on the Changbai Mountains in Northeast China, and incubated under different temperatures(5, 10, 15, 20, 25, and 30?C) and soil moisture levels(30%, 60%, and 90% of saturated soil moisture) to investigate the effects of both on SOM decomposition and its temperature sensitivity at different elevations. The results showed that incubation temperature(F = 1 425.10, P < 0.001), soil moisture(F = 1 327.65, P < 0.001), and elevation(F = 1 937.54, P < 0.001) all had significant influences on the decomposition rate of SOM. The significant effect of the interaction of incubation temperature and soil moisture on the SOM decomposition rate was observed at all the 5 sampling elevations(P < 0.001). A two-factor model that used temperature and moisture as variables fitted the SOM decomposition rate well(P < 0.001) and could explain 80%–93% of the variation of SOM decomposition rate at the 5 elevations. Temperature sensitivity of SOM decomposition, expressed as the change of SOM decomposition rate in response to a 10?C increase in temperature(Q_(10)), was significantly different among the different elevations(P < 0.01), but no apparent trend with elevation was discernible. In addition, soil moisture and incubation temperature both had great impacts on the Q_(10) value(P < 0.01), which increased significantly with increasing soil moisture or incubation temperature. Furthermore, the SOM decomposition rate was significantly related to soil total Gram-positive bacteria(R^2= 0.33, P < 0.01) and total Gram-negative bacteria(R^2= 0.58, P < 0.001). These findings highlight the importance of soil moisture to SOM decomposition and its Q_(10) value,which needs to be emphasized under warming climate scenarios. | WANG Dan HE Nianpeng WANG Qing LV Yuliang WANG Qiufeng XU Zhiwei ZHU Jianxing | 2016 | Pedosphere2016，26，3： | 12 |
| 4 | Nitrogen Deposition and Its Spatial Pattern in Main Forest Ecosystems along North-South Transect of Eastern China显示文摘A continuous three-year observation(from May 2008 to April 2011)was conducted to characterize the spatial variation of dissolved inorganic nitrogen(DIN)deposition at eight main forest ecosystems along the north-south transect of eastern China(NSTEC).The results show that both throughfall DIN deposition and bulk DIN deposition increase from north to south along the NSTEC.Throughfall DIN deposition varies greatly from 2.7 kg N/(ha·yr)to 33.0 kg N/(ha·yr),with an average of 10.6 kg N/(ha·yr),and bulk DIN deposition ranges from 4.1 kg N/(ha·yr)to 25.4 kg N/(ha·yr),with an average of 9.8 kg N/(ha·yr).NH4+-N is the dominant form of DIN deposition at most sampling sites.Additionally,the spatial variation of DIN deposition is controlled mainly by precipitation.Moreover,in the northern part of the NSTEC,bulk DIN deposition is 17%higher than throughfall DIN deposition,whereas the trend is opposite in the southern part of the NSTEC.The results demonstrate that DIN deposition would likely threaten the forest ecosystems along the NSTEC,compared with the critical loads(CL)of N deposition,and DIN deposition in this region is mostly controlled by agricultural activities rather than industrial activities or transportation. | ZHAN Xiaoyun YU Guirui HE Nianpeng FANG Huajun JIA Bingrui ZHOU Mei WANG Chuankuan ZHANG Junhui ZHAO Guangdong WANG Silong LIU Yunfen YAN Junhua | 2014 | Chinese Geographical Science2014，24，2： | 10 |
| 5 | Spatial pattern of grassland aboveground biomass and its environmental controls in the Eurasian steppe显示文摘Vegetation biomass is an important component of terrestrial ecosystem carbon stocks. Grasslands are one of the most widespread biomes worldwideplaying an important role in global carbon cycling. Thereforestudying spatial patterns of biomass and their correlations to environment in grasslands is fundamental to quantifying terrestrial carbon budgets. The Eurasian steppean important part of global grasslandsis the largest and relatively well preserved grassland in the world. In this studywe analyzed the spatial pattern of aboveground biomass(AGB)and correlations of AGB to its environment in the Eurasian steppe by meta-analysis. AGB data used in this study were derived from the harvesting method and were obtained from three data sources(literatureglobal NPP database at the Oak Ridge National Laboratory Distributed Active Archive Center(ORNL)some data provided by other researchers). Our results demonstrated that:(1) as for the Eurasian steppe overallthe spatial variation in AGB exhibited significant horizontal and vertical zonality. In detailAGB showed an inverted parabola curve with the latitude and with the elevationwhile a parabola curve with the longitude. In additionthe spatial pattern of AGB had marked horizontal zonality in the Black Sea-Kazakhstan steppe subregion and the Mongolian Plateau steppe subregionwhile horizontal and vertical zonality in the Tibetan Plateau alpine steppe subregion.(2) Of the examined environmental variablesthe spatial variation of AGB was related to mean annual precipitation(MAP)mean annual temperature(MAT)mean annual solar radiation(MAR)soil Gravel contentsoil p H and soil organic content(SOC) at the depth of 0–30 cm. NeverthelessMAP dominated spatial patterns of AGB in the Eurasian steppe and its three subregions.(3) A Gaussian function was found between AGB and MAP in the Eurasian steppe overallwhich was primarily determined by unique patterns of grasslands and environment in the Tibetan Plateau. AGB was significantly positively related to MAP in the Black Sea-Kazakhstan steppe subregion(elevation < 3000 m)the Mongolian Plateau steppe subregion(elevation < 3000 m) and the surface(elevation ≥ 4800 m) of the Tibetan Plateau. Neverthelessthe spatial variation in AGB exhibited a Gaussian function curve with the increasing MAP in the east and southeast margins(elevation < 4800 m) of the Tibetan Plateau. This study provided more knowledge of spatial patterns of AGB and their environmental controls in grasslands than previous studies only conducted in local regions like the Inner Mongolian temperate grasslandthe Tibetan Plateau alpine grasslandetc. | JIAO Cuicui YU Guirui HE Nianpeng MA Anna GE Jianping HU Zhongmin | 2017 | Journal of Geographical Sciences2017，27，1： | 7 |
| 6 | Vertical Distribution of Soil Carbon, Nitrogen, and Phosphorus in Typical Chinese Terrestrial Ecosystems显示文摘Characterization of the vertical distribution of soil organic carbon(C), nitrogen(N), and phosphorus(P) may improve our ability to accurately estimate soil C, N, and P storage. Based on a database of 21 354 records in 74 long-term monitoring plots from 2004 to 2013 in the Chinese Ecosystem Research Network(CERN), we built fitting functions to quantify the vertical distribution of soil C, N, and P(up to 100 cm depth) in the typical Chinese terrestrial ecosystems. The decrease of soil C, N, and P content with depth can be well fitted with various mathematical functions. The fitting functions differed greatly between artificial(agriculture) and natural(desert, forest, and grassland) ecosystems, and also differed with respect to soil C, N, and P content. In both the artificial and natural ecosystems, the best fitting functions were exponential functions for C, quadratic functions for N, and quadratic functions for P. Furthermore, the stoichiometric ratios of soil C, N, and P were ranked in descending order: grassland > forest > agriculture > desert, and were also associated with climate. This study is the first to build the fitting functions for the profile distribution of soil C, N, and P in China at a national scale. Our findings provide a scientific basis to accurately assess the storage of C, N, and P in soils at a large scale, especially for the integrative analysis of historical data. | CHAI Hua YU Guirui HE Nianpeng WEN Ding LI Jie FANG Jiangping | 2015 | Chinese Geographical Science2015，25，5： | 7 |
| 7 | Carbon sequestration potential and its eco-service function in the karst area, China显示文摘石灰岩地区常见的地形批评地区是碳(C) 水池的一个必要部件,组成全球 C 周期。它被叫作仍然保持大部分不确定的剩余陆地水池之一。石灰岩地区常见的地形区域(2.2?? | SONG Xianwei GAO Yang WEN Xuefa GUO Dali YU Guirui HE Nianpeng ZHANG Jinzhong | 2017 | Journal of Geographical Sciences2017，27，8： | 4 |
| 8 | Regional Variation in Carbon Sequestration Potential of Forest Ecosystems in China显示文摘Enhancing forest carbon(C) storage is recognized as one of the most economic and green approaches to offsetting anthropogenic CO_2 emissions. However, experimental evidence for C sequestration potential(C_(sp)) in China's forest ecosystems and its spatial patterns remain unclear, although a deep understanding is essential for policy-makers making decisions on reforestation. Here, we surveyed the literature from 2004 to 2014 to obtain C density data on forest ecosystems in China and used mature forests as a reference to explore C_(sp). The results showed that the C densities of vegetation and soil(0–100 cm) in China's forest ecosystems were about 69.23 Mg C/ha and 116.52 Mg C/ha, respectively. In mature forests, the C_(sp) of vegetation and soil are expected to increase to 129.26 Mg C/ha(87.1%) and 154.39 Mg C/ha(32.4%) in the coming decades, respectively. Moreover, the potential increase of C storage in vegetation(10.81 Pg C) is estimated at approximately twice that of soil(5.01 Pg C). Higher C_(sp) may occur in the subtropical humid regions and policy-makers should pay particular attention to the development of new reforestation strategies for these areas. In addition to soil nutrients and environment, climate was an important factor influencing the spatial patterns of C density in forest ecosystems in China. Interestingly, climate influenced the spatial patterns of vegetation and soil C density via different routes, having a positive effect on vegetation C density and a negative effect on soil C density. This estimation of the potential for increasing forest C storage provided new insights into the vital roles of China's forest ecosystems in future C sequestration. More importantly, our findings emphasize that climate constraints on forest C sequestration should be considered in reforestation strategies in China because the effects of climate were the opposite for spatial patterns of C density in vegetation and soil.Enhancing forest carbon(C) storage is recognized as one of the most economic and green approaches to offsetting anthropogenic CO2 emissions. However, experimental evidence for C sequestration potential(Csp) in China's forest ecosystems and its spatial patterns remain unclear, although a deep understanding is essential for policy-makers making decisions on reforestation. Here, we surveyed the literature from 2004 to 2014 to obtain C density data on forest ecosystems in China and used mature forests as a reference to explore Csp. The results showed that the C densities of vegetation and soil(0–100 cm) in China's forest ecosystems were about 69.23 Mg C/ha and 116.52 Mg C/ha, respectively. In mature forests, the Csp of vegetation and soil are expected to increase to 129.26 Mg C/ha(87.1%) and 154.39 Mg C/ha(32.4%) in the coming decades, respectively. Moreover, the potential increase of C storage in vegetation(10.81 Pg C) is estimated at approximately twice that of soil(5.01 Pg C). Higher Csp may occur in the subtropical humid regions and policy-makers should pay particular attention to the development of new reforestation strategies for these areas. In addition to soil nutrients and environment, climate was an important factor influencing the spatial patterns of C density in forest ecosystems in China. Interestingly, climate influenced the spatial patterns of vegetation and soil C density via different routes, having a positive effect on vegetation C density and a negative effect on soil C density. This estimation of the potential for increasing forest C storage provided new insights into the vital roles of China's forest ecosystems in future C sequestration. More importantly, our findings emphasize that climate constraints on forest C sequestration should be considered in reforestation strategies in China because the effects of climate were the opposite for spatial patterns of C density in vegetation and soil. | XU Li WEN Ding ZHU Jianxing HE Nianpeng | 2017 | Chinese Geographical Science2017，27，3： | 3 |
| 9 | 1980~2050年大气沉降导致中国森林土壤酸化显示文摘稳定的土壤pH对维持生态系统的结构和功能至关重要.中国是酸沉降最严重的区域,长期高剂量的酸沉降可能将导致土壤pH显著降低,甚至造成严重的区域生态环境问题.然而,目前有关酸沉降对中国森林土壤酸化的影响还未见报道.本文利用土壤酸化过程模型结合长期监测的大气沉降、植物-土壤养分含量数据、社会发展、气候和污染控制情景,评估并预测1980~2050年间大气沉降导致的森林土壤酸化趋势.结果表明:1980~2019年,表层土壤pH和碱基饱和度分别平均下降0.56和18%.氮沉降的贡献小于硫沉降,但它仍在持续增加.预测结果表明,2020~2050年可持续发展结合高强度减排情景相较于不采取措施情景可使土壤pH下降减少60%,但仍不能逆转土壤pH降低.因此,在未来不仅需要继续控制酸性污染物的排放,还需要加强氮的控制,并在土壤酸化高风险区采取相应恢复措施. | Qiongyu Zhang Jianxing Zhu Qiufeng Wang Li Xu Mingxu Li Guanhua Dai Jan Mulder Yue Xi Nianpeng He | 2022 | Science Bulletin2022，67，9： | 2 |
| 10 | Effects of the frequency and the rate of N enrichment on community structure in a temperate grassland显示文摘Aims Nitrogen(N)enrichment caused by human activities threatens bio-diversity and alters plant community composition and structure.It has been found that heavy and infrequent N inputs may over-estimate species extinction,but it remains unclear whether plant community structure will equally respond to frequent reactive N enriched conditions.Methods We independently manipulated the rates and the frequencies of N addition in a temperate steppe,northern China,between 2008 and 2013.Important Findings We found that plant community structure changes,measured by‘Euclidean distance’involving species richness,composition and productivity,were significantly positively related to increasing N enrichment rates rather than frequencies.Changes in aboveground net primary productivity(ANPP),plant species richness and shifts in dominant species were observed.Community ANPP increased with N enrichment,whereas species richness reduced.The frequency of N enrichment increased species richness but had no impacts on community ANPP and the relative ANPP of the two dominant spe-cies,C3 perennial bunchgrass Stipa grandis and C3 perennial rhi-zome grass Leymus chinensis.The ANPP and relative ANPP of the two dominant species were significantly negatively correlated with each other.Moreover,changes in the relative ANPP of S.grandis was negatively associated with the changes in community structure.After 5 years’treatment,direct influence of the frequency of N en-richment on plant community structure was not observed,but the effects of the rate of N enrichment were apparent.Our results sug-gested that further study in various ecosystems and with long-term and well-controlled comparisons the frequency vs.the rate of N enrichment may still be needed. | Yunhai Zhang Jing Wang Carly J.Stevens Xiaotao Lü Nianpeng He Changhui Wang Xingguo Han | 2018 | Journal of Plant Ecology2018，11，5： | 2 |
| 11 | Ammonia emissions from soil under sheep grazing in Inner Mongolian grasslands of China显示文摘Ammonia (NH3) emission and redeposition play a major role in terrestrial nitrogen (N) cycles and can also cause environmental problems, such as changes in biodiversity, soil acidity, and eutrophication. Previous field grazing experiments showed inconsistent (positive, neutral, and negative) NH3 volatilization from soils in response to varying grazing intensities. However, it remains unclear whether, or to what extent, NH3 emissions from soil are affected by increasing grazing intensities in Inner Mongolian grasslands. Using a 5-year grazing experiment, we investigated the relationship between NH3 volatilization from soil and grazing pressure (0.0, 3.0, 6.0, and 9.0 sheep/hm2 ) from June to September of 2009 and 2010 via the vented-chamber method. The results show that soil NH3 volatilization was not significantly different at different grazing intensities in 2009, although it was higher at the highest stocking rate during 2010. There was no significant linear relationship between soil NH3 volatilization rates and soil NH4+-N, but soil NH3 volatilization rates were significantly related to soil water content and air temperature. Grazing intensities had no significant influence on soil NH3 volatilization. Soil NH3 emissions from June to September (grazing period), averaged over all grazing intensities, were 9.6±0.2 and 19.0±0.2 kg N/hm2 in 2009 and 2010, respectively. Moreover, linear equations describing monthly air temperature and precipitation showed a good fit to changes in soil NH3 emissions (r=0.506, P=0.014). Overall, grazing intensities had less influence than that of climatic factors on soil NH3 emissions. Our findings provide new insights into the effects of grazing on NH3 volatilization from soil in Inner Mongolian grasslands, and have important implications for understanding N cycles in grassland ecosystems and for estimating soil NH3 emissions on a regional scale. | YunHai ZHANG NianPeng HE GuangMing ZHANG JianHui HUANG QiBing WANG QingMin PAN XingGuo HAN | 2013 | Journal of Arid Land2013，5，2： | 2 |
| 12 | Changes in leaf stomatal traits of different aged temperate forest stands显示文摘Stomata control carbon and water vapor exchange between the leaves and the atmosphere,thus infl uencing photosynthesis and transpiration.Combinations of forest patches with different stand ages are common in nature,however,information of which stomatal traits vary among these stands and how,remains limited.Here,seven different aged forest stands(6,14,25,36,45,55,and 100 years)were selected in typical temperate,mixed broadleaf-conifer forests of northeast China.Stomatal density,size and relative area of 624 species,including the same species in stands of different ages were selected.Stomatal density,size and relative area were distributed log-normally,differing across all species and plant functional groups.Stomatal density ranged from 4.2 to 1276.7 stomata mm^(–2),stomatal size ranged from 66.6 to 8315.7μm^(2),and stomatal relative area 0.1–93.3%.There was a significant negative relationship between density and size at the species and functional group levels,while the relative stomatal area was positively correlated with density and size.Stomatal traits of dominant species were relatively stable across different stand ages but were significantly different for herbs.The results suggest that stomatal traits remain relatively stable for dominant species in natural forests and therefore,spatial variation in stomatal traits across forest patches does not need to be incorporated in future ecological models. | Qian Li Jihua Hou Nianpeng He Li Xu Zihao Zhang | 2021 | Journal of Forestry Research2021，32，3： | 2 |
| 13 | Carbon and nitrogen store and storage potential as affected by land-use in a Leymus chinensis grassland of northern China显示文摘 | Nianpeng He Qiang Yu Ling Wu Yuesi Wang Xingguo Han | 2008 | Soil Biology and Biochemistry2008，，12： | 1 |
| 14 | Effects of reactive nitrogen deposition on terrestrial and aquatic ecosystems显示文摘 | Yang Gao Nianpeng He Xinyu Zhang | 2014 | Ecological Engineering2014，，： | 1 |
| 15 | Spatial and dec- adal variations in inorganic nitrogen wet deposition in China induced by human activity 显示文摘 | JIA Yanlong YU Guirui HE Nianpeng | 2014 | Scientific Reports2014，4，3763： | 1 |
| 16 | 脉冲降水对森林中土壤有机物矿化的影响:空间变化和控制因素显示文摘降水脉冲效应使土壤有机物在短时间内迅速分解并释放大量CO2到大气中。降水脉冲效应对生态系统的碳循环和土壤碳平衡的研究具有十分重要的意义,但它在森林土壤中的空间变化和基本机制仍不清楚。我们采集中国东部22个典型森林生态系统的土壤样品(0–10cm),研究模拟脉冲降水对土壤微生物呼吸速率的影响。模拟降水脉冲使土壤样品达到65%饱和含水量,以分钟为单位测量Rs,持续48小时。研究结果显示,降水脉冲可以使微生物呼吸速率迅速增加1.70–38.12倍。微生物最大呼吸速率(R_(s-soil-max))、碳释放总量Rs(A_(Rs-soil))和达到呼吸峰值的时间(T_(Rs-soil-max))在不同的土壤中存在显著差异。此外,不同气候区的脉冲效应也有明显不同。中温带的R_(s-soil-max)(11.701μg C g^(-1) soil h^(-1))和A_(Rs-soil)(300.712μg C g^(-1) soil)最高。土壤化学特性(总碳和总氮、pH值和氧化还原电位)和土壤粒径与森林土壤的脉冲效应密切相关,但土壤微生物的贡献较小。我们的研究结果表明,在大尺度范围内,脉冲变化短期内增加森林土壤中CO2的排放,并揭示了对这种变化影响最大的因素。这些发现为未来对森林生态系统的碳循环和调节全球生态系统碳循环的研究提供科学数据支持。 | Zhaoxia Jiang Hongfeng Bian Li Xu Mingxu Li Nianpeng He | 2021 | Journal of Plant Ecology2021，14，5： | 1 |
| 17 | Carbon and Nitrogen Store and Storage Potential as Affected by Land - Use in a Leymus Chinensis Grassland of Northern China显示文摘 | Nianpeng He Qiang Yu Yuesi Wang | 2008 | Soil Biology and Biochemistry2008，40，： | 1 |
| 18 | 中国植物叶片硫含量的空间变异与适应机制显示文摘硫是植物生长发育和形态建成所必需的营养元素之一,并在其非生物胁迫抗性和环境适应等方面发挥着重要作用。因此,揭示植物叶片硫含量(leaf sulfur content,LSC)的空间变异规律和适应机制,将有助于我们进一步了解植物的进化机制以及功能元素利用策略。本研究采用统一的采样流程和测试方法,构建了中国80个典型生态系统(包括31个森林、38个草原和11个荒漠)、2207种植物叶片硫含量的实测数据库,系统地评估了不同植物生长型(PGFs)和生态系统之间LSC的差异,并探讨了LSC的空间变异规律及其主要环境驱动因素。研究结果表明:(1)中国区域自然植被LSC的变化范围为0.15–48.64 g·kg^(-1),平均值为2.13±0.04 g·kg^(-1)。(2)LSC在不同生态系统和植被类型之间存在显著的空间变异特征。尤其发现干旱地区或草本植物的LSC较高。叶片在干旱、低温和强紫外线辐射环境中倾向于积累更多的硫,可能是植物增强胁迫生境抗逆性的重要途径。(3)温度、降水、辐射、土壤硫含量和干旱的交互作用共同调控着LSC,并解释了其79%的空间变异;而系统发育对LSC空间变异没有显著影响。本研究从中国区域尺度揭示了LSC的空间变异规律,证实LSC在植物应对极端环境的重要作用及其机制,拓展了人们对硫的生物功能的认识。 | Wenzong Zhao Chunwang Xiao Mingxu Li Li Xu Nianpeng He | 2022 | Journal of Plant Ecology2022，15，4： | 1 |
| 19 | Stoichiometric homeostasis of vascular plants in the Inner Mongolia grassland 显示文摘 | YU Qiang ELSER J J HE Nianpeng | 2011 | Oecologia2011，166，： | 1 |
| 20 | Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors显示文摘Microbial metabolic quotient(MMQ) is the rate of soil microbial respiration per unit of microbial biomass, and represents the capacity of soil microbes to utilize soil organic matter.Understanding the regional variation and determinants of MMQ can help predict the responses of soil respiration rate to global climate change.Accordingly, we measured and analyzed MMQ-related data(e.g., soil basic respiration rate at 20℃ and soil microbial biomass) from 17 grassland sites, which located in meadow steppe, typical steppe, and desert steppe along a 1000-km transect across the Inner Mongolian grasslands, China.Results showed that MMQ varied significantly among the different grassland types(P < 0.05;desert > typical > meadow) and decreased from southwest to northeast(r =–0.81) with increasing latitude(r = – 0.50), and with increasing mean annual precipitation(r = –0.69).Precipitation accounted for 56% of the total variation in MMQ, whereas temperature accounted for 26%.MMQ was negatively correlated with precipitation across the Inner Mongolian grasslands.Therefore, climate change, especially in regard to precipitation, may influence soil microbial respiration and soil carbon dynamics through altering MMQ.These results highlighted the importance of spatial patterns in MMQ for accurately evaluating the responses of soil respiration to climate change at regional and global scales. | CAO Yingqiu XU Li ZHANG Zhen CHEN Zhi HE Nianpeng | 2019 | Chinese Geographical Science2019，29，6： | 1 |
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