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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 | Mangement of Sterrte neerosis in instances of severeacute Pancreatitis显示文摘 | Ran B Pralle U Uhl W | 1995 | Jan Cell Sing1995，181，4： | 2 |
| 3 | Field studies on 32P movement and P leaching from flooded paddy soils in the region of Taihu lake, China显示文摘 | Xie X J Ran W Shen Q R | 2004 | Environmental Geochemistry and Health2004，26，： | 1 |
| 4 | Application of bio-organic fertilizer significantly affected fungal diversity of soils显示文摘 | Luo J Ran W Hu J | 2010 | Soil Biology and Biochemistry2010，74，6： | 1 |
| 5 | Magnetically switchable bioe- lectrocatalytic system based on ferrocene grafted iron oxide nanoparticles 显示文摘 | Peng R Zhang W J Ran Q | 2011 | Langmuir2011，27，： | 1 |
| 6 | Degradability of forage proteins by in situ and in vitro enzymatic methods 显示文摘 | COBLENTZ W K ABDELGADIR I E O COCH- RAN R C | 1999 | Journal of Dairy Science1999，82，： | 1 |
| 7 | Hapten - protein conjugates prepared by the mixed anhydride method显示文摘 | Gendloff E H Casale W L Ran B P | 1986 | Journal of lmmunological Melhod1986，92，： | 1 |
| 8 | Wetting on Nanoporous Alumina Surface: Transition Between Wenzel and Cassie States Controlled by Surface Structure 显示文摘 | RAN C DING G LIU W | 2008 | Langmuir2008，24，18： | 1 |
| 9 | Human targets of Pseudomonas aeruginosa pyocyanin显示文摘 | Ran H Hassett D J Lau G W | 2003 | Proc Natl Acad Sci USA2003，100，14： | 1 |
| 10 | Field studies on 32P movement and P leaching from flooded paddy soils in the region of Taihu Lake,China显示文摘 | Xie X J Ran W Shen Q R | 2004 | Environmental Geochemistry and Health2004，26，2： | 1 |
| 11 | Long-term monito- ring and safety evaluation of a metro station during deep excavation显示文摘 | Ran L Ye X W Zhu H H | 2011 | Procedia Engineer- ing2011，14，： | 1 |
| 12 | A monoclonal antibody that blocks VEGF binding to VEGFR2 (KDR/Flk-1) inhibits vascular expression of Flk-1 and tumor growth in an orthotopic human breast cancer model显示文摘 | Zhang W Ran S Sambade M | 2002 | Angiogenesis2002，5，12： | 1 |
| 13 | Epidemiology of Campylobacter and campylobacter-iosis 显示文摘 | Shu Y W Zhang L S Ran Lu | 2004 | Chin J Food Hygiene2004，1，： | 1 |
| 14 | Glucose biosensor enhanced by nanoparticle显示文摘 | Tang F Q Men D X W Ran J G | 2000 | Science in China(B series)2000，3，： | 1 |
| 15 | The role of condensed or- ganic matter in the nonlinear sorption of hydrophobic organic contaminants by a peat and sediments 显示文摘 | RAN Y HUANG W RAO P S | 2002 | Journal of Environ- mental Quality2002，31，6： | 1 |
| 16 | Mechanisms of nitrite accumulation occurring in soil nitrification显示文摘 | Shen Q R Ran W Cao Z H | 2003 | Chemosphcre2003，50，6： | 1 |
| 17 | Coevolution of codon usage and tRNA genes leads to alternative stable states of biased codon usage 显示文摘 | HIGGS P G RAN W | 2008 | Molecular Biology and Evolution2008，25，11： | 1 |
| 18 | Acute hypoxia activates store- operated Ca (2 + ) entry and increases intracellular Ca (2 + ) concentration in rat distal pulmonary venous smooth muscle cells 显示文摘 | Peng G Ran P Lu W | 2013 | J Thorac Dis2013，5，5： | 1 |
| 19 | Large-scale freeway network traffic monitoring:A map-matching algorithm based on low-logging frequency GPS probe data显示文摘 | Wang W Jin J Ran B | 2011 | Journal of Intelligent Transportation Systems2011，15，2： | 1 |
| 20 | Performance and mecha-nism of a multi-functional superplasticizer for concrete显示文摘 | RAN Q P MIAO C W LIU J P | 2006 | Materials Transactions2006，47，6： | 1 |
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