气候变化领域集成服务门户(CCPortal): Assessing spectral measures of post-harvest forest recovery with field plot data

CCPortal

DOI	10.1016/j.jag.2019.04.010
	Assessing spectral measures of post-harvest forest recovery with field plot data
	White J.C.; Saarinen N.; Wulder M.A.; Kankare V.; Hermosilla T.; Coops N.C.; Holopainen M.; Hyyppä J.; Vastaranta M.
发表日期	2019
ISSN	15698432
起始页码	102
结束页码	114
卷号	80
英文摘要	Information regarding the nature and rate of forest recovery is required to inform forest management, monitoring, and reporting activities. Delayed establishment or return of forests has implications to harvest rotations and carbon uptake, among others, creating a need for spatially-explicit, large-area, characterizations of forest recovery. Landsat time series (LTS) has been demonstrated as a means to quantitatively relate forest recovery, noting that there are gaps in our understanding of the linkage between spectral measures of forest recovery and manifestations of forest structure and composition. Field plots provide a means to better understand the linkage between forest characteristics and spectral recovery indices. As such, from a large set of existing field plots, we considered the conditions present for the year in which the co-located pixel was considered spectrally recovered using the Years to Recovery (Y2R) metric. Y2R is a long-term metric of spectral recovery that indicates the number of years required for a pixel to return to 80% of its pre-disturbance Normalized Burn Ratio value. Absolute and relative metrics of recovery at 5 years post-disturbance were also considered. We used these three spectral recovery metrics to predict the stand development class assigned by the field crew for 284 seedling plots with an overall accuracy of 73.59%, with advanced seedling stands more accurately discriminated (omission error, OE = 15.74%) than young seedling stands (OE = 49.84%). We then used field-measured attributes (e.g. height, stem density, dominant species) from the seedling plots to classify the plots into three spectral recovery groups, which were defined using the Y2R metric: spectral recovery in (1) 1–5 years, (2) 6–10 years, or (3) 11–15 years. Overall accuracy for spectral recovery groups was 61.06%. Recovery groups 1 and 3 were discriminated with greater accuracy (producer's and user's accuracies > 66%) than recovery group 2 (< 50%). The top field-measured predictors of spectral recovery were mean height, dominant species, and percentage of stems in the plot that were deciduous. Variability in stand establishment and condition make it challenging to accurately discriminate among recovery rates within 10 years post-harvest. Our results indicate that the long-term metric Y2R relates to forest structure and composition attributes measured in the field and that spectral development post-disturbance corresponds with expectations of structural development, particularly height, for different species, site types, and deciduous abundance. These results confirm the utility of spectral recovery measures derived from LTS data to augment landscape-level assessments of post-disturbance recovery. © 2019
英文关键词	Boreal; Composite-to-Change; Forest; Landsat; Regeneration; Seedling plot; Time series
语种	英语
scopus关键词	boreal forest; forest management; Landsat; seedling; stand structure; time series analysis
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156452
作者单位	Canadian Forest Service, (Pacific Forestry Centre), Natural Resources Canada, 506 West Burnside Road, Victoria, BC V8Z 1M5, Canada; Department of Forest Sciences, University of Helsinki, P.O. Box 27, 00014, Finland; Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute FGI, National Land Survey of Finland, Geodeetinrinne 2, 02431 Masala, Finland; School of Forest Sciences, University of Eastern Finland, P.O. Box-111, Joensuu, 80101, Finland
推荐引用方式 GB/T 7714	White J.C.,Saarinen N.,Wulder M.A.,et al. Assessing spectral measures of post-harvest forest recovery with field plot data[J],2019,80.
APA	White J.C..,Saarinen N..,Wulder M.A..,Kankare V..,Hermosilla T..,...&Vastaranta M..(2019).Assessing spectral measures of post-harvest forest recovery with field plot data.International Journal of Applied Earth Observation and Geoinformation,80.
MLA	White J.C.,et al."Assessing spectral measures of post-harvest forest recovery with field plot data".International Journal of Applied Earth Observation and Geoinformation 80(2019).