| DOI: | 10.1016/j.foreco.2017.06.042
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| Scopus记录号: | 2-s2.0-85021184015
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| 论文题名: | Tree size thresholds produce biased estimates of forest biomass dynamics |
| 作者: | Searle E.B.; Chen H.Y.H.
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| 刊名: | Forest Ecology and Management
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| ISSN: | 0378-1127
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| 出版年: | 2017
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| 卷: | 400 | | 起始页码: | 468
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| 结束页码: | 474
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| 语种: | 英语
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| 英文关键词: | Boreal forest
; Climate change
; Sampling bias
; Size threshold
; Stand development
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| Scopus关键词: | Biomass
; Climate change
; Dynamics
; Productivity
; Above ground biomass
; Boreal forests
; Diameter-at-breast heights
; Observational study
; Permanent sample plots
; Sampling bias
; Size threshold
; Stand development
; Forestry
; aboveground biomass
; biomass
; boreal forest
; climate change
; data set
; forest dynamics
; forest management
; growth rate
; mortality
; sampling bias
; spatial analysis
; stand structure
; threshold
; Canada
; Manitoba
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| 英文摘要: | Studies that examine forest biomass dynamics often rely on long-term, spatially extensive, repeatedly measured permanent sample plots. Due to the intensive cost of sampling all trees within these plots, an arbitrary size threshold is typically imposed, which leads to only larger trees being sampled. However, it remains unclear whether the sampling of only large trees is representative of the entirety of stands of diverse sizes; the sampling of only large trees may produce biased estimates of biomass dynamics (growth, ingrowth, and mortality). Using a network of 141 permanent sample plots from Manitoba, Canada, with all trees of >1.3 m in height repeatedly measured, we constructed three distinct data sets, with 10 cm, 5 cm, and no diameter at breast height threshold, to illustrate that total productivity and mortality are increasingly underestimated with increasingly larger diameter at breast height thresholds. This effect is particularly significant in young stands, where productivity estimates peak at least 20 years earlier than the determined estimates under large thresholds. We highlight the need to account for smaller trees in long-term observational studies to ensure unbiased estimates of stand level aboveground biomass productivity and loss. © 2017 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/64262
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| Appears in Collections: | 影响、适应和脆弱性
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作者单位: | Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada
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| Recommended Citation: | |
Searle E.B.,Chen H.Y.H.. Tree size thresholds produce biased estimates of forest biomass dynamics[J]. Forest Ecology and Management,2017-01-01,400
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