|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Photosynthetic and Respiratory Acclimation to Experimental Warming for Four SpeCies in a Tallgrass Prairie Ecosystem显示文摘全球温度被 0.6 度 C 在过去的世纪增加了并且被预言在这个世纪底由 1.4-5.8 度 C 增加。全球温暖将在高草种类上有什么影响,是不清楚的。在现在的学习,我们检验了光合的率( Pn )和叶呼吸在翠菊 ericoides 的黑暗( Rd )评估的叶网, Ambrosiapsilostachya ,向日葵女人是并且响应在大平原(俄克拉何马)的 atallgrass 大草原生态系统的试验性的温暖的 Sorghastrum 坚果 ans ,美国,在 2000-2001 的秋天。Warminghas 自从 1999 年 11 月 21 日,与红外线的加热器实现了。Pn 在春天显著地增加了,在早秋天减少了,并且没在与控制相比温暖下面在四种在夏天和晚秋变化。四种的 Rd 显著地增加了直到仲夏然后没在温暖下面变化。测量温度反应为 H.mollis 和 S 由 2.32 和 4.59 度 C 温暖增加了的 Pnshowed 弄弯 Pn (Topt ) 的最适温度。坚果 ans,分别地在 8 月,而在 5 月和 9 月没有变化,并且一。ericoides 和 A。psilostachya 也没在任何 3 个月显示出变化。然而,在显示出的最适温度(Popt ) 的 Pn 在 5 月和 Augustfor 在 9 月和没有规定击倒规定所有四种。Rd 的温度反应曲线说明 Rd 的温度敏感, Q10,与对照小区相比在温暖的阴谋是更低的除了在 8 月的 A.ericoides,而为所有四种在 5 月和 9 月没有变化。现在的学习的 Theresults 显示光合、呼吸的环境适应与种类并且在季节之中变化,发生在中间成长的季节并且不在早、迟了的生长期…… | Xuhui Zhou Xiaozhong Liu Linda L. Wallace Yiqi Luo | 2007 | Journal of Integrative Plant Biology2007，49，3： | 11 |
| 2 | Conditional inversion to estimate parameters from eddy-flux observations显示文摘Aims Data assimilation is a useful tool to extract information from large datasets of the net ecosystem exchange(NEE)of CO_(2) obtained by eddy-flux measurements.However,the number of parameters in ecosystem models that can be constrained by eddy-flux data is limited by conventional inverse analysis that estimates parameter values based on one-time inversion.This study aimed to improve data assimilation to increase the number of constrained parameters.Methods In this study,we developed conditional Bayesian inversion to maximize the number of parameters to be constrained by NEE data in several steps.In each step,we conducted a Bayesian inversion to constrain parameters.The maximum likelihood estimates of the constrained parameters were then used as prior to fix parameter values in the next step of inversion.The conditional inversion was repeated until there were no more parameters that could be further constrained.We applied the conditional inversion to hourly NEE data from Harvard Forest with a physiologically based ecosystem model.Important Findings Results showed that the conventional inversion method constrained 6 of 16 parameters in the model while the conditional inversion method constrained 13 parameters after six steps.The cost function that indicates mismatch between the modeled and observed data decreased with each step of conditional Bayesian inversion.The Bayesian information criterion also decreased,suggesting reduced information loss with each step of conditional Bayesian inversion.A wavelet analysis reflected that model performance under conditional Bayesian inversion was better than that under conventional inversion at multiple time scales,except for seasonal and half-yearly scales.In addition,our analysis also demonstrated that parameter convergence in a subsequent step of the conditional inversion depended on correlations with the parameters constrained in a previous step.Overall,the conditional Bayesian inversion substantially increased the number of parameters to be constrained by NEE data and can be a powerful tool to be used in data assimilation in ecology. | Xiaowen Wu Yiqi Luo Ensheng Weng Luther White Yong Ma Xuhui Zhou | 2009 | Journal of Plant Ecology2009，2，2： | 3 |
| 3 | Inverse analysis of coupled carbon-nitrogen cycles against multiple datasets at ambient and elevated CO_(2)显示文摘Aims Carbon(C)sequestration in terrestrial ecosystems is strongly regulated by nitrogen(N)processes.However,key parameters that determine the degree of N regulation on terrestrial C sequestration have not been well quantified.Methods Here,we used a Bayesian probabilistic inversion approach to estimate 14 target parameters related to ecosystem C and N interactions from 19 datasets obtained from Duke Forests under ambient and elevated carbon dioxide(CO_(2)).Important FindingsOur results indicated that 8 of the 14 target parameters,such as C:N ratios in most ecosystem compartments,plant N uptake and external N input,were well constrained by available datasets whereas the others,such as N allocation coefficients,N loss and the initial value of mineral N pool were poorly constrained.Our analysis showed that elevated CO_(2)led to the increases in C:N ratios in foliage,fine roots and litter.Moreover,elevated CO_(2)stimulated plant N uptake and increased ecosystem N capital in Duke Forests by 25.2 and 8.5%,respectively.In addition,elevated CO_(2)resulted in the decrease of C exit rates(i.e.increases in C residence times)in foliage,woody biomass,structural litter and passive soil organic matter,but the increase of C exit rate in fine roots.Our results demonstrated that CO_(2)enrichment substantially altered key parameters in determining terrestrial C and N interactions,which have profound implications for model improvement and predictions of future C sequestration in terrestrial ecosystems in response to global change. | Zheng Shi Yuanhe Yang Xuhui Zhou Ensheng Weng Adrien C.Finzi Yiqi Luo | 2016 | Journal of Plant Ecology2016，9，3： | 2 |
| 4 | Invasion of Spartina alterniflora Enhanced Ecosystem Carbon and Nitrogen Stocks in the Yangtze Estuary, China显示文摘 | Chengzhang Liao Yiqi Luo Lifen Jiang Xuhui Zhou Xiaowen Wu Changming Fang Jiakuan Chen Bo Li | 2007 | Ecosystems2007，，： | 1 |
| 5 | Synthesis,microstructure,and growth mechanism of dendrite ZnO nanowires显示文摘 | Zhang Ye Jia Hongbo Luo Xuhui | 2003 | J Phys Chem B2003，107，33： | 1 |
| 6 | Labile, recalcitrant, and microbial carbon and nitrogen pools of a tallgrass prairie soil in the US Great Plains subjected to experimental warming and clipping显示文摘 | Asfaw Belay-Tedla Xuhui Zhou Bo Su Shiqiang Wan Yiqi Luo | 2008 | Soil Biology and Biochemistry2008，，1： | 1 |
| 7 | Labile, recalcitrant, and microbial carbon and nitrogen pools of a tallgrass prairie soil in the US Great Plains subjected to experimental warming and clipping显示文摘 | Asfaw Belay-Tedla Xuhui Zhou Bo Su Shiqiang Wan Yiqi Luo | 2008 | Soil Biology and Biochemistry2008，，1： | 1 |
| 8 | Labile, recalcitrant, and microbial carbon and nitrogen pools of a tallgrass prairie soil in the US Great Plains subjected to experimental warming and clipping显示文摘 | Asfaw Belay-Tedla Xuhui Zhou Bo Su Shiqiang Wan Yiqi Luo | 2008 | Soil Biology and Biochemistry2008，，1： | 1 |
| 9 | Source compo- nents and interannual variability of soil CO2 e{flux un- der experimental warming and clipping in a grassland ecosystem显示文摘 | Zhou Xuhui Wan Shiqiang Luo Yiqi | 2007 | Global Change Biology2007，13，4： | 1 |
| 10 | Con-struction and Application of Soil Erosion Control and Circular Agriculture Mode in Hilly Red Soil of Southern China显示文摘 | Boqi weng Zhenmei zhong Xuhui luo | | 0，，7： | 1 |
| 11 | Construction of physical crosslink-based chitosan/liquid crystal composite hydrogel and evaluation on their cytocompatibility显示文摘In order to provide a novel biomimetic composite substrate for tissue engineering and explore the interaction between cells and this type of material,we developed chitosan/liquid crystal(CS/LC)composite hydrogel with embedded LC phases by composing of cholesterol hydroxypropyl cellulose ester liquid crystalline material and CS.The micromorphology of CS/LC composite hydrogels exhibited‘islands-sea’phase separation structures similar to the‘fluid mosaic model’of biomembrane.In vitro cell compatibility study suggested that 3T3 is fibroblasts exhibited better initial cell adhesions and higher proliferation rates on the composite hydrogel than on the polystyrene control plate and the pure LC membrane.This novel CS/LC composite hydrogel provides more favorable interface for cell growth and proliferation and may serve as potentially active substrate for engineering interfaces to live cells. | Lin Du Xiaohui Yang Wenqiang Li Xuhui Luo Hao Wu Jiaqing Zhang Mei Tu | 2017 | Regenerative Biomaterials2017，4，1： | 0 |
| 12 | Adopting A.pintoi as Live Mulch for Peach Orchards in China:Benefits of Soil and Water Conservation and Comprehensive Eco-service显示文摘Soil erosion occurred in orchards has often attracted extensive attentions from the society with environmental considerations,as orchard is one of major methods of agricultural production in China.In the hilly red soil region of China,many orchards are established on slope lands with a lack of grass covers,leading to severe soil losses.In order to mitigate this common environmental problem and evaluate the efficiency of erosion-control approaches,four treatments were set in field plots in this study,including terraced peach orchard with Arachis pintoi cv.Amarillo as mulch and Paspalum natatu and Digitariasmutsii as hedgerows(TTM),terraced peach orchard without conservation measures(TTW),sloping peach orchard with A.pintoi as mulch and P.natatu and Digitariasmutsii as hedgerows(STM),and sloping peach orchard without conservation measures(STW).The surface runoff,sediment yields and the contents of soil nutrients and organic carbon were monitored in the four treatments and the comprehensive eco-service benefits were further evaluated.The results indicate that available phosphorus(AP),available potassium(AK),total nitrogen(TN) and organic matter(OM) in the soils of the TTM treatments and STM were significantly higher than those of the treatments TTW and STW,suggesting positive effects of the vegetation covers on the soil nutrients.Mean annual surface runoff and coefficient ranged from 0.86 to 34.79 m^3,and 0.007 to 0.282,respectively;the treatment TTM exhibited the best water conservation benefits and the treatment STW was the worst.Soil erosion modulus of the plots were 0-28.76t/hm^2 per year in average,and the treatments TTM and STM reduced significantly soil loss in comparison of the treatments TTW and STW;(d) total organic carbon in the vegetation covers ranged from 130.23 to 195.93 kg per year,and that for TTM and STM treatment significantly higher than TTW and STW treatment;comprehensive eco-service values of the orchards were evaluated considering all the factors including water conservation,soil fertility conservation,CO_2 fixation and O_2 supply,ranging from 563.35 $/y to 765.51 $/y.As expected,the treatments TTM and STM had significantly greater eco-service values than the treatments TTW and STW.In summary,we concluded that terraced orchard with A.pintoi as live mulch plus Paspalum natatu and Digitariasmutsii as hedgerows is a highly sustainable land use practice for the slope lands in red soil hilly region of China. | Zhenmei ZHONG Boqi WENG Yixiang WANG Xuhui Luo Jing YE | 2016 | Agricultural Science & Technology2016，17，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员