Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.

The relative importance of fuel, topography, and weather on fire spread varies at different spatial scales, but how the relative importance of these controls respond to changing spatial scales is poorly understood. We designed a "moving window" resampling technique that allowed us to quant...

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Autores principales:	Zhihua Liu, Jian Yang, Hong S He
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/31e929295b1f44eca27ef41ac85216ba
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spelling	oai:doaj.org-article:31e929295b1f44eca27ef41ac85216ba2021-11-18T07:59:06ZIdentifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.1932-620310.1371/journal.pone.0055618https://doaj.org/article/31e929295b1f44eca27ef41ac85216ba2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23383247/?tool=EBIhttps://doaj.org/toc/1932-6203The relative importance of fuel, topography, and weather on fire spread varies at different spatial scales, but how the relative importance of these controls respond to changing spatial scales is poorly understood. We designed a "moving window" resampling technique that allowed us to quantify the relative importance of controls on fire spread at continuous spatial scales using boosted regression trees methods. This quantification allowed us to identify the threshold value for fire size at which the dominant control switches from fuel at small sizes to weather at large sizes. Topography had a fluctuating effect on fire spread across the spatial scales, explaining 20-30% of relative importance. With increasing fire size, the dominant control switched from bottom-up controls (fuel and topography) to top-down controls (weather). Our analysis suggested that there is a threshold for fire size, above which fires are driven primarily by weather and more likely lead to larger fire size. We suggest that this threshold, which may be ecosystem-specific, can be identified using our "moving window" resampling technique. Although the threshold derived from this analytical method may rely heavily on the sampling technique, our study introduced an easily implemented approach to identify scale thresholds in wildfire regimes.Zhihua LiuJian YangHong S HePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e55618 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhihua Liu Jian Yang Hong S He Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
description	The relative importance of fuel, topography, and weather on fire spread varies at different spatial scales, but how the relative importance of these controls respond to changing spatial scales is poorly understood. We designed a "moving window" resampling technique that allowed us to quantify the relative importance of controls on fire spread at continuous spatial scales using boosted regression trees methods. This quantification allowed us to identify the threshold value for fire size at which the dominant control switches from fuel at small sizes to weather at large sizes. Topography had a fluctuating effect on fire spread across the spatial scales, explaining 20-30% of relative importance. With increasing fire size, the dominant control switched from bottom-up controls (fuel and topography) to top-down controls (weather). Our analysis suggested that there is a threshold for fire size, above which fires are driven primarily by weather and more likely lead to larger fire size. We suggest that this threshold, which may be ecosystem-specific, can be identified using our "moving window" resampling technique. Although the threshold derived from this analytical method may rely heavily on the sampling technique, our study introduced an easily implemented approach to identify scale thresholds in wildfire regimes.
format	article
author	Zhihua Liu Jian Yang Hong S He
author_facet	Zhihua Liu Jian Yang Hong S He
author_sort	Zhihua Liu
title	Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
title_short	Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
title_full	Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
title_fullStr	Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
title_full_unstemmed	Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.
title_sort	identifying the threshold of dominant controls on fire spread in a boreal forest landscape of northeast china.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/31e929295b1f44eca27ef41ac85216ba
work_keys_str_mv	AT zhihualiu identifyingthethresholdofdominantcontrolsonfirespreadinaborealforestlandscapeofnortheastchina AT jianyang identifyingthethresholdofdominantcontrolsonfirespreadinaborealforestlandscapeofnortheastchina AT hongshe identifyingthethresholdofdominantcontrolsonfirespreadinaborealforestlandscapeofnortheastchina
_version_	1718422655921553408

Identifying the threshold of dominant controls on fire spread in a boreal forest landscape of Northeast China.

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