Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1111/gcb.15187 |
| A lesson unlearned? Underestimating tree cover in dryland biases global restoration maps | |
| Fagan, M. E. | |
| 通讯作者 | Fagan, ME |
| 来源期刊 | GLOBAL CHANGE BIOLOGY
 |
| ISSN | 1354-1013 |
| EISSN | 1365-2486 |
| 出版年 | 2020 |
| 卷号 | 26期号:9页码:4679-4690 |
| 英文摘要 | Two recent global maps of tree restoration potential have identified vast regions where tree cover could be increased, ranging from 0.9 to 2.3 billion hectares. Both maps, however, emphasized dryland regions, with arid biomes making up 36%-42% of potential restoration area. Dryland biomes have repeatedly been recognized as inappropriate regions for expanding tree cover due to the risks of biodiversity loss, water overconsumption, and fire, so maps that highlight these regions for restoration must sustain careful scrutiny. Here, I show that both recent attempts to map restoration potential in arid regions have been hindered by underlying errors in the global tree cover maps they used. Systematic underestimates of existing sparse tree cover led directly to large overestimates of the potential for tree recovery in drylands. The Atlas of Forest Landscape Restoration Opportunities (Laestadius et al.,Unasylva, 2011,62, 47) overestimated tree restoration potential across a third of arid biomes by between 7% and 20% (55-166 million hectares [Mha]). Similarly, Bastin, Finegold, Garcia, Mollicone, et al. (Science, 2019, 365, 76) overestimated tree restoration potential across all arid biomes by 33%-45% (316-440 Mha). These inaccuracies limit the utility of this research for policy decisions in drylands and overstate the potential for tree planting to address climate change. Given this long-standing but underappreciated challenge in mapping global tree cover, I propose various ways forward that keep this lesson in mind. To better monitor and restore tree cover, I call for re-interpretation and correction of existing global maps, and for a new focus on quantifying sparse tree cover in drylands and other systems. |
| 英文关键词 | afforestation desertification dry forests ecosystem restoration forest landscape restoration global forest change grasslands REDD plus remote sensing savannas |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000544756800001 |
| WOS关键词 | SEMIARID ECOSYSTEMS ; CLIMATE-CHANGE ; FOREST ; VARIABILITY ; VEGETATION ; GRASSLANDS ; WOODLANDS ; EXPANSION ; SAVANNAS ; IMAGERY |
| WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/324897 |
| 作者单位 | [Fagan, M. E.] Univ Maryland Baltimore Cty, Dept Geog & Environm Syst, 1000 Hilltop Circle, Baltimore, MD 21250 USA |
| 推荐引用方式 GB/T 7714 | Fagan, M. E.. A lesson unlearned? Underestimating tree cover in dryland biases global restoration maps[J],2020,26(9):4679-4690. |
| APA | Fagan, M. E..(2020).A lesson unlearned? Underestimating tree cover in dryland biases global restoration maps.GLOBAL CHANGE BIOLOGY,26(9),4679-4690. |
| MLA | Fagan, M. E.."A lesson unlearned? Underestimating tree cover in dryland biases global restoration maps".GLOBAL CHANGE BIOLOGY 26.9(2020):4679-4690. |
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