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| 1 | Mapping aboveground biomass and its prediction uncertainty using LiDAR and field data, accounting for tree-level allometric and LiDAR model errors显示文摘Background: The increasing availability of remotely sensed data has recently challenged the traditional way of performing forest inventories, and induced an interest in model-based inference. Like traditional design-based inference, model-based inference allows for regional estimates of totals and means, but in addition for wall-to-wall mapping of forest characteristics. Recently Light Detection and Ranging(LiDAR)-based maps of forest attributes have been developed in many countries and been well received by users due to their accurate spatial representation of forest resources. However, the correspondence between such mapping and model-based inference is seldom appreciated. In this study we applied hierarchical model-based inference to produce aboveground biomass maps as well as maps of the corresponding prediction uncertainties with the same spatial resolution. Further, an estimator of mean biomass at regional level, and its uncertainty, was developed to demonstrate how mapping and regional level assessment can be combined within the framework of model-based inference.Results: Through a new version of hierarchical model-based estimation, allowing models to be nonlinear, we accounted for uncertainties in both the individual tree-level biomass models and the models linking plot level biomass predictions with LiDAR metrics. In a 5005 km2 large study area in south-central Sweden the predicted aboveground biomass at the level of 18 m×18 m map units was found to range between 9 and 447 Mg·ha^-1. The corresponding root mean square errors ranged between 10 and 162 Mg·ha^-1. For the entire study region, the mean aboveground biomass was 55 Mg·ha^-1 and the corresponding relative root mean square error 8%. At this level 75%of the mean square error was due to the uncertainty associated with tree-level models.Conclusions: Through the proposed method it is possible to link mapping and estimation within the framework of model-based inference. Uncertainties in both tree-level biomass models and models linking plot level biomass with LiDAR data are accounted for, both for the uncertainty maps and the overall estimates. The development of hierarchical model-based inference to handle nonlinear models was an important prerequisite for the study. | Svetlana Saarela AndréWästlund Emma Holmström Alex Appiah Mensah Sören Holm Mats Nilsson Jonas Fridman Göran Ståhl | 2020 | Forest Ecosystems2020，7，3： | 3 |
| 2 | Direct observation of continuous electric dipole rotation in flux- closure domains in ferroelectric Pb ( Zr, Ti ) 03 显示文摘 | Jia C L Urban K W Alexe M | 2011 | Science2011，331，6023： | 1 |
| 3 | Coping style as a psychological resource of grateful people显示文摘 | Alex M W Stephen J Linley A P | 2007 | Journal of Social and Clinical Psychology2007，26，9： | 1 |
| 4 | Borehole-to-Surface Electromagnetic Survey 显示文摘 | Tseng H W Becker Alex Wilt M J Deszcz-Pann M | 1998 | Geophysics1998，63，5： | 1 |
| 5 | Australia's response to HIV among peo-ple who inject drugs 显示文摘 | Annie M Alex W | 2014 | AIDS Educat Prevent2014，26，3： | 1 |
| 6 | Coping Style as a Psychological Resource of Grateful People 显示文摘 | ALEX M W STEPHEN J | 2007 | Journal of Social and Clinical Psychology2007，26，9： | 1 |
| 7 | Characterization of polyploid wheat genomic diversity using a high-density 90 000 single nucleotide polymorphism array 显示文摘 | Wang SC Debbie W Kerrie F Alexandra A Shiaoman C Bevan EH Marco M Silvio S Sara GM Luigi C Anna MM Alex W Stuart S Gary B Ralf W Joerg P International Wheat Genome Sequencing Consortium Morten L Diane M Rudi A Rudy D Gina BG Abraham K Alina RA Catherine F Jerome S Michele M Curtis P Luo MC Jan DMM Jorge D Martin G Roberto T Cindy L Ivan M Colin C Keith JE Matthew H Eduard A | 2014 | Plant Biotechnol J2014，12，： | 1 |
| 8 | Modified enzyme activity assay to determine biofilm biomass显示文摘 | Phillip W Butterfield Alex M Bargmeyer Anne K Camper | 2002 | Journal of Microbiological Methods2002，50，： | 1 |
| 9 | Crystal structure of a GCN5-related N-acety ltransferase:serratia marcescens aminoglycoside 3-N-acetyltransferase显示文摘 | Eva w Alex V Yasutaka M | 1998 | Cell1998，，94： | 1 |
| 10 | Cross-species amplification of microsatellite loci in aphids: assessment and application 显示文摘 | ALEX C C W BLANDINE M JEAN-CHRISTOPHE S | 2004 | Molecular Ecology Notes2004，4，： | 1 |
| 11 | Root strength, growth, and rates of decay: root reinforcement changes of two tree species and their contribution to slope stability显示文摘 | Alex W Chris P Michael M | 1999 | Plant and Soil1999，217，： | 1 |
| 12 | Nitrogen and phosphorus retention in wetlands-ecoogieal approaches to solving excess nutrient problems显示文摘 | William J M Alex J H Robert W N | 2000 | Ecoogical Engineering2000，，14： | 1 |
| 13 | Extraction and PCR amplification of DNA from Minuteectopar asitic fungi显示文摘 | Alex W Blackwell M | | 0，，04： | 1 |
| 14 | 针对优化药物治疗仍高血糖的2型糖尿患者的营养干预随机对照研究(LOADD)——糖尿病生活方式高于药物治疗(摘要)显示文摘目的 确定强化饮食干预对优化药物治疗血糖仍高的2型糖尿患者的血糖控制和心血管疾病风险因素的影响程度。 | Kirsten J Coppell Minako Kataoka Sheila M Williams Alex W Chisholm Sue M Vorgers Jim I Mann 闵锐(译) 李玉秀(校) | 2010 | 英国医学杂志中文版2010，13，5： | 1 |
| 15 | Alter signaling and regulatory mechanisms of apoptosis in focal and segmental glomerulosclerosis显示文摘 | Wang W Alex T Divjak M | 2001 | J Am Soc Nephrol2001，12，7： | 1 |
| 16 | Extraction and PCR amplification of DNA from minuteectoparasitic fungi 显示文摘 | Alex W Blackwell M | 2001 | Mycologia2001，93，4： | 1 |
| 17 | Phenyl-Perfluorophenyl Stacking Interactions:Topochemical Photodimerization and Photopolymerization of Olefinic Compounds显示文摘 | Geoffrey W C Alex R D Lawrence M | 1998 | J Am Chem Soc1998，110，： | 1 |
| 18 | Well-ordered large-area arrays of epitaxial ferroelectric ( Bi, La )4Ti3O12 nanostructures fabricated by gold nanotube-membrane lithography显示文摘 | Lee S K Lee W Alexe M | 2005 | Appl Phys Lett2005，86，15： | 1 |
| 19 | Sensitivity analysis and other improvements to tailored combinatorial library design显示文摘 | Alex W | 2000 | J Chem Inf Comput Sci2000，40，2： | 1 |
| 20 | Dynamic correlation analysis of financial contagion in Asian markets in global financial turmoil 显示文摘 | Yiu M S Alex Ho W Y Choi D F | 2010 | Applied Financial Economics2010，20，4： | 1 |
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