Madagascar's fire regimes challenge global assumptions about landscape degradation

Fire and environmental dataset (2003 - 2019) for Phelps et al. (2022, Global Change Biology). Associated manuscript abstract: Narratives of landscape degradation are often linked to unsustainable fire use by local communities. Madagascar is a case in point: the island is considered globally exceptional, with its remarkable endemic biodiversity seen as threatened by unsustainable anthropogenic fire. Yet, fire regimes on Madagascar have not been empirically characterised or globally contextualised. Here, we apply a comparative approach using MODIS remote sensing data (2003-2019), to determine relationships between Madagascar’s fire regimes and global patterns and trends. We demonstrate that Madagascar’s fire regimes are similar to 88% of tropical burned area, with shared climate and vegetation characteristics. Therefore, rather than a global exception, Madagascar’s fire regimes could usefully be understood as a microcosm of most tropical fire regimes, which contribute to global understand..., Fire: We defined fire regimes with Global Fire Atlas data (Andela et al. 2019), based on the MODIS dataset MCD64A1 version 6 (Giglio et al. 2018), available from 2003 - 2016. 12 fire characteristics were calculated and hierarchically clustered in order to define Madagascar’s fire regimes (column 4: \"orig_Mada_regime\"). The 12 fire characteristics (column 12-23) include yearly and monthly variables of average burned area (column 14-15), coefficient of variation (CV) in burned area (column 12-13), average fire number (column 18-19), CV of fire number (column 16-17), average fire size (column 22-23), and CV of fire size (column 20-21). Monthly CV characteristics reflect average annual seasonality, and yearly CV characteristics reflect year-to-year variation across the study period. Average fire season length was also calculated by the number of months burned per year (column 24: \"BAseasonLength\"). No landscape-scale fire (NLSF) regimes were identified as pixels without burned area (column ...,

用于Phelps等人（2022年发表于《全球变化生物学》(Global Change Biology)）的2003-2019年火灾与环境数据集。相关论文摘要：景观退化的叙事往往与当地社区不可持续的用火方式挂钩。马达加斯加便是典型案例：该岛屿被视为全球特例，其独特的特有生物多样性被认为受到人为不合理用火的威胁。然而，学界尚未对马达加斯加的火灾制度开展实证特征刻画或全球语境下的对比分析。本研究采用基于MODIS（中分辨率成像光谱仪，Moderate Resolution Imaging Spectroradiometer）遥感数据（2003-2019年）的对比分析方法，探究马达加斯加火灾制度与全球模式及趋势之间的关联。研究表明，马达加斯加的火灾制度覆盖了全球88%的热带火烧面积，二者具有相似的气候与植被特征。因此，马达加斯加的火灾制度并非全球特例，反而可作为多数热带火灾制度的缩影，这有助于深化全球对……的认知。
火灾相关说明：本研究依托全球火灾图集（Global Fire Atlas）数据（Andela等，2019）定义火灾制度，该数据集基于2003-2016年可用的MODIS MCD64A1第6版数据（Giglio等，2018）。研究计算了12项火灾特征指标，并通过层级聚类划定马达加斯加的火灾制度（第4列："orig_Mada_regime"）。这12项火灾特征指标（第12-23列）涵盖年均与月均火烧面积（第14-15列）、火烧面积变异系数（Coefficient of Variation，CV，第12-13列）、年均火灾次数（第18-19列）、火灾次数变异系数（CV，第16-17列）、年均过火斑块平均面积（第22-23列）以及过火斑块面积变异系数（CV，第20-21列）。月尺度变异系数特征反映年度平均季节动态，年尺度变异系数特征则反映研究时段内的年际波动。本研究同时通过每年火烧月份数计算了平均火季长度（第24列："BAseasonLength"）。未将无火烧像元（第……列）划归为景观尺度火灾制度（无景观尺度火烧，NLSF）。