气候变化领域集成服务门户(CCPortal): Floristic evidence for alternative biome states in tropical Africa

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DOI	10.1073/pnas.2011515117
	Floristic evidence for alternative biome states in tropical Africa
	Aleman J.C.; Fayolle A.; Favier C.; Staver A.C.; Dexter K.G.; Ryan C.M.; Azihou A.F.; Bauman D.; te Beest M.; Chidumayo E.N.; Comiskey J.A.; Cromsigt J.P.G.M.; Dessard H.; Doucet J.-L.; Finckh M.; Gillet J.-F.; Gourlet-Fleury S.; Hempson G.P.; Holdo R.M.; Kirunda B.; Kouame F.N.; Mahy G.; Maiato F.; Gonçalves P.; McNicol I.; Nieto Quintano P.; Plumptre A.J.; Pritchard R.C.; Revermann R.; Schmitt C.B.; Swemmer A.M.; Talila H.; Woollen E.; Swaine M.D.
发表日期	2020
ISSN	0027-8424
起始页码	28183
结束页码	28190
卷号	117 期号:45
英文摘要	The idea that tropical forest and savanna are alternative states is crucial to how we manage these biomes and predict their future under global change. Large-scale empirical evidence for alternative stable states is limited, however, and comes mostly from the multimodal distribution of structural aspects of vegetation. These approaches have been criticized, as structure alone cannot separate out wetter savannas from drier forests for example, and there are also technical challenges to mapping vegetation structure in unbiased ways. Here, we develop an alternative approach to delimit the climatic envelope of the two biomes in Africa using tree species lists gathered for a large number of forest and savanna sites distributed across the continent. Our analyses confirm extensive climatic overlap of forest and savanna, supporting the alternative stable states hypothesis for Africa, and this result is corroborated by paleoecological evidence. Further, we find the two biomes to have highly divergent tree species compositions and to represent alternative compositional states. This allowed us to classify tree species as forest vs. savanna specialists, with some generalist species that span both biomes. In conjunction with georeferenced herbarium records, we mapped the forest and savanna distributions across Africa and quantified their environmental limits, which are primarily related to precipitation and seasonality, with a secondary contribution of fire. These results are important for the ongoing efforts to restore African ecosystems, which depend on accurate biome maps to set appropriate targets for the restored states but also provide empirical evidence for broad-scale bistability. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Alternative stable states \| tropical biomes \| tree species composition precipitation and seasonality \| fire
语种	英语
scopus关键词	Africa; article; forest; precipitation; quantitative analysis; savanna; seasonal variation; species composition
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160737
作者单位	Aleman, J.C., Gembloux Agro-Bio Tech, Université de Liège, Gembloux, 5030, Belgium, Département de Géographie, Université de Montréal, Montréal, QC H2V 0B3, Canada; Fayolle, A., Gembloux Agro-Bio Tech, Université de Liège, Gembloux, 5030, Belgium; Favier, C., Institut des Sciences de l’Evolution–Montpellier, CNRS, Ecole Pratique des Hautes Etudes, Institut de Recherche pour le Développement, Universitéde Montpellier, Montpellier, 34000, France; Staver, A.C., Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, United States; Dexter, K.G., School ofGeoSciences, University of Edinburgh, Edinburgh, EH8 9YL, United Kingdom, Tropical Diversity Section, Royal Botanic Garden Edinburgh, Edinburgh, EH3 5LR, United Kingdom; Ryan, C.M., School ofGeoSciences, University of Edinburgh, Edinburgh, EH8 9YL, United Kingdom; Azihou, A.F., Laboratory of Applied Ecology, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, 01 BP 526, Benin; Bauman, D., Environmental Change I...
推荐引用方式 GB/T 7714	Aleman J.C.,Fayolle A.,Favier C.,et al. Floristic evidence for alternative biome states in tropical Africa[J],2020,117(45).
APA	Aleman J.C..,Fayolle A..,Favier C..,Staver A.C..,Dexter K.G..,...&Swaine M.D..(2020).Floristic evidence for alternative biome states in tropical Africa.Proceedings of the National Academy of Sciences of the United States of America,117(45).
MLA	Aleman J.C.,et al."Floristic evidence for alternative biome states in tropical Africa".Proceedings of the National Academy of Sciences of the United States of America 117.45(2020).