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Latitudinal variation of leaf morphological traits from species to communities along a forest transect in eastern China

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Journal of Geographical Sciences 2016年第1期26卷 15-26页

作者：王瑞丽于贵瑞何念鹏王秋凤赵宁徐志伟 Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCAS University of Chinese Academy of Sciences Cold and Arid Regions Environmental and Engineering Research Institute CAS School of Geographical Sciences Northeast Normal University

Comprehensive information on geographic patterns of leaf morphological traits in Chinese forests is still *** explore the spatial patterns of leaf traits,we investigated leaf area(LA),leaf thickness(LT),specific leaf area(SLA),and leaf dry matter content(LDMC) across 847 species from nine typical forests along the North-South Transect of Eastern China(NSTEC) between July and August 2013,and also calculated the community weighted means(CWM) of leaf traits by determining the relative dominance of each *** results showed that,for all species,the means(± SE) of LA,LT,SLA,and LDMC were 2860.01 ± 135.37 mm2,0.17 ± 0.003 mm,20.15 ± 0.43 m2 kg–1,and 316.73 ± 3.81 mg g–1,***,latitudinal variation in leaf traits differed at the species and community ***,at the species level,SLA increased and LDMC decreased as latitude increased,whereas no clear latitudinal trends among LA or LT were found,which could be the result of shifts in plant functional *** scaling up to the community level,more significant spatial patterns of leaf traits were observed(R2 = 0.46–0.71),driven by climate and soil N *** results provided synthetic data compilation and analyses to better parameterize complex ecological models in the future,and emphasized the importance of scaling-up when studying the biogeographic patterns of plant traits.

关键词： latitudinal pattern leaf morphological trait community weighted mean forest ecosystem North-South Transect of Eastern China

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Carbon sequestration potential and its eco-service function in the karst area, China

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Journal of Geographical Sciences 2017年第8期27卷 967-980页

作者： SONG Xianwei GAO Yang WEN Xuefa GUO Dali YU Guirui HE Nianpeng ZHANG Jinzhong College of Resources and Environment Southwest University Chongqing 400716 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

The karst critical zone is an essential component of the carbon （C） pool, constituting the global C cycle. It is referred to as one of the ＂residual land sink＂ that remains largely in- determinate. Karst area （2.2×10^7 km^2） comprises 15% of the world＇s land area, and karst area comprises 3.44~106 km^2 of area in China. Due to the complexity of karst structure and its considerable heterogeneity, C sequestration rate estimations contain large inaccuracies, especially in relation to the different methods used in calculations. Therefore, we reevaluated rock weathering-related C sink estimations in China （approximately 4.74 Tg C yr^-1）, which we calibrated from previous studies. Additionally, we stipulated that more comprehensive re- search on rock-soil-biology-atmosphere continuum C migration is essential to better under- stand C conversion mechanisms based on uncertainty analyses of C sink estimations. Moreover, we stressed that a collective confirmation of chemical methods and simulated models through a combined research effort could at least partially eliminate such uncertainty. Furthermore, integrated C cycling research need a long-term observation of the carbon flux of multi-interfaces. The enhanced capacity of ecosystem C and soil C pools remains an effective way of increasing C sink. Karst ecosystem health and security is crucial to human social de- velopment, accordingly, it is critical that we understand thresholds or potential C sink capacities in karst critical zones now and in the future.

关键词： karst karst critical zone carbon sink carbon sequestration rate China

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THE CARBON STORAGE OF OLD-GROWTH FORESTS MEANS THE HUGE POTENTIAL CARBON SEQUESTRATION FOR THE WORLD FOREST

THE CARBON STORAGE OF OLD-GROWTH FORESTS MEANS THE HUGE POTE...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Yingchun Liu Guirui Yu Graduate University of Chinese Academy of Sciences BeijingChina Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina

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CARBON-WATER RELATIONS IN TYPICAL ecosystemS IN CHINA:RESULTS FROM FLUX MEASUREMENTS AND FIELD SURVEYS ALONG CLIMATIC GRADIENTS

CARBON-WATER RELATIONS IN TYPICAL ECOSYSTEMS IN CHINA:RESULT...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Hu Zhongmin Yu Guirui Zhu Xianjin Wang Qiufeng Li Shenggong Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

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PATTERNS AND DRIVING FACTORS OF WUE AND NUE IN NATURAL FOREST ecosystemS ALONG NORTH-SOUTH TRANSECT OF EASTERN CHINA------BASED ON ISOTOPE AND STOICHIOMETRY ANALYSES

PATTERNS AND DRIVING FACTORS OF WUE AND NUE IN NATURAL FORES...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Wenping Sheng Shujie Ren Guirui YU Huajun Fang Key Laboratory of Ecosystem Network Observation and Modeling Synthesis Research Center of Chinese Ecosystem Research NetworkInstitute of Geographic Sciences and Natural Resources ResearchCASBeijing 1O0101China

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Estimating the optimal vegetation coverage for the dominant tree and shrub species over China's northwest drylands

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Science China Earth Sciences 2024年第5期67卷 1500-1517页

作者： Zhongdian ZHANG Xiaoxu JIA Ping ZHU Mingbin HUANG Lidong REN Ming’an SHAO School of Geographic Sciences Xinyang Normal UniversityXinyang 464000China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China Yellow River Delta Modern Agricultural Engineering Laboratory Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationNorthwest A&F UniversityYangling 712100China

Anthropogenic revegetation is an effective way to control soil erosion and restore degraded ecosystems in China's northwest drylands(NWD).However,excessive vegetation cover expansion has long been known to increase evapotranspiration,leading to reduced local water availability,which can in turn threaten the health and services of restored *** the optimal vegetation coverage(OVC)is critical for balancing the trade-off between plant growth and water consumption in water-stressed areas,yet quantitative assessments over the entire NWD are still *** this study,a modified Biome BioGeochemical Cycles(Biome-BGC)model was used to simulate the long-term(1961–2020)dynamics of actual evapotranspiration(ET_(a)),net primary productivity(NPP),and leaf area index(LAI)for the dominant non-native tree(*** and ***)and shrub(*** and ***)species at 246 meteorological sites over *** modified model incorporated the Richards equation to simulate transient unsaturated water flow in a multilayer soil module,and both soil and eco-physiological parameters required by the model were validated using field-observed ETadata for each *** distributions of OVC(given by the mean maximum LAI,LAI_(max))for the dominant species were determined within three hydrogeomorphic sub-areas(i.e.,the loess hilly-gully sub-area,the windy and sandy sub-area,and the desert sub-area).The modified Biome-BGC model performed well in terms of simulating ET_(a) dynamics for the four plant *** distributions of mean ET_a,NPP,and LAI_(max)generally exhibited patterns similar to mean annual precipitation(MAP).In the loess hilly-gully sub-area(MAP:210 to 710 mm),the OVC respectively ranged from 1.7 to 2.9 and 0.8 to 2.9 for *** and *** the windy and sandy sub-area(MAP:135 to 500 mm),the OVC ranged from 0.3 to 3.3,0.5 to 2.6 and 0.6 to 2.1for ***,*** and ***,*** the desert sub-

关键词： Optimal vegetation coverage Water balance Leaf area index Biome-BGC model Dryland

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ENVIRONMENTAL CONTROLS OVER THE SEASONAL VARIATION OF SOIL RESPIRATION IN THREE STANDS IN A NORTH SUBTROPICAL FOREST,CENTRAL CHINA

ENVIRONMENTAL CONTROLS OVER THE SEASONAL VARIATION OF SOIL R...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Qingpeng Yang Ming Xu Yonggang Chi Yunpu Zheng Lixiang Liu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

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A Meta-analysis of the Effects of Warming and Elevated CO_2 on Soil Microbes

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Journal of Resources and Ecology 2019年第1期10卷 69-76页

作者： FU Gang ZHANG Haorui LI Shaowei SUN Wei Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Soil microbes play important roles in terrestrial ecosystem carbon and nitrogen cycling. Climatic warming and elevated CO2 are two aspects of climatic change. In this study, we used a meta-analysis approach to synthesise observations related to the effects of warming and elevated CO2 on soil microbial biomass and community structure. ecosystem types were mainly grouped into forests and grasslands. Warming methods included open top chambers and infrared radiators. Experimental settings included all-day warming, daytime warming and nighttime warming. Warming increased soil actinomycetes and saprotrophic fungi, while elevated CO2 decreased soil gram-positive bacteria(G+). Mean annual temperature and mean annual precipitation were negatively correlated with warming effects on gram-negative bacteria(G–) and total phospholipid fatty acid(PLFA), respectively. Elevation was positively correlated with the warming effect on total PLFA, bacteria, G+ and G–. Grassland exhibited a positive response of total PLFA and actinomycetes to warming, while forest exhibited a positive response in the ratio of soil fungi to bacteria(F/B ratio) to warming. The open top chamber method increased G–, while the infrared radiator method decreased the F/B ratio. Daytime warming rather than all-day warming increased G–. Our findings indicated that the effects of warming on soil microbes differed with ecosystem types, warming methods, warming times, elevation and local climate conditions.

关键词： ecosystem types elevated CO2 increased temperature response ratio warming methods

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Moving toward a new era of ecosystem science

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Geography and Sustainability 2021年第3期2卷 151-162页

作者： Guirui Yu Shilong Piao Yangjian Zhang Lingli Liu Jian Peng Shuli Niu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing 100871China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

ecosystem is a fundamental organizational unit of the biosphere in which biological communities interact with their non-biological environment through energy flows and material *** science is the study of patterns,processes,and services of *** the 1990s,rising concerns regarding global climate change,biodiversity loss,ecosystem degradation,and sustainability of the human-dominated biosphere have stimulated the growth of ecosystem science,which is expected to provide systematic solutions to many of these major issues facing human *** paper provides a comprehensive review of the current progress in ecosystem science and identifies some key research challenges facing this *** demonstrate that a key feature of the current progress in ecosystem science is its evolution from primarily theoretical explorations toward more systematic,integrative and application-oriented ***,five major changes in the discipline over the past several decades can be *** include:(1)the expansion of the primary goal from understanding nature to include human activities;(2)the broadening of the research focus from single ecosystem types to macro-ecosystems comprising multiple regional ecosystems;(3)the shifting of research methods from small-scale observations and experiments to large-scale observations,network experiments,and model simulations;(4)the increasing attention to comprehensive integration of ecosystem components,processes,and scales;and(5)the shifting from a primarily biology-oriented focus to an integrated multi-disciplinary scientific *** ecosystem science still faces many challenges in the future,these directional changes,along with the rapidly enriched research tools and data acquisition capabilities,lay a promising ground for the discipline’s future as a fundamental scientific basis for solving many environmental challenges facing human societies.

关键词： Large-scale macro-systems Sustainable development Interdisciplinary research ecosystem science

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Analysis of the Potential for Crop-livestock Integration in Burang County, China

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Journal of Resources and Ecology 2020年第1期11卷 69-76页

作者： DUAN Cheng SHI Peili ZONG Ning ZHANG Xianzhou Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy ofSciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100190China

Crop-livestock integration(CLI)is a significant practice for livestock grazing systems in alpine range*** offers the potential to achieve sustainable crop and livestock ***,the separate crop and livestock systems that exist today have led to issues of intensive agriculture,rangeland degradation and forage shortage in the Tibetan *** crop-livestock integration through sown pastures can be an effective way to lift pasture productivity and improve livestock ***,to explore the potential for integrating crop and livestock production in alpine grazing systems,an assessment of potential forage and livestock production using multiple datasets was carried out in Burang County,*** showed the marginal land potentially available for sown pastures was about 560 ha,located mostly in the Burang township of the Karnali ***mulated temperature was the dominant limiting factor for establishing sown pastures,therefore cold tolerance of forage species and growth period should be taken into ***,the number of livestock decreased during the period 2012–2016;yet often,the number of livestock in rangeland landscape was greater than that in agro-pastoral *** average number of livestock was about 110000 standard sheep units(SU)in the study area,but forage from sown pastures and crop residues could potentially feed about 11000 SU,accounting for 50%of the livestock population in the Karnali *** found that integrating crop and forage production could fill feed gaps for grazing systems,particularly in the agro-pastoral landscape of the Karnali *** results of this study provide scientific support to guide future forage production and to promote further crop and livestock integration in Burang County.

关键词： crop-livestock integration(CLI) sown pastures forage production alpine rangelands Burang County

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