首页|Fire triggers reestablishment of invasive grasses in a neotropical savanna under restoration

Fire triggers reestablishment of invasive grasses in a neotropical savanna under restoration

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  • NETL
  • NSTL
  • Wiley
Excluding invasive grasses is a significant challenge for neotropical savanna restoration. Invasive grasses alter fire regimes with feedbacks on soil nutrient pools, favoring their own dominance over native species. Here we combine remote sensing with an opportunistic experiment to monitor a savanna under restoration before and after a large natural fire. We measured vegetation and soil fertility in a 4-year-old restoration area in Central Brazil, which was subsequently hit by a lightning fire. The restoration area was originally utilized as pasture, dominated by invasive grasses. Over the restoration period, native fast-growing grasses replaced the invasive species. Within the first year after the fire, we found that the fire had reduced aboveground biomass, species diversity, and abundance of native species with acquisitive resource-use strategies. Soil phosphorus and pH increased after the fire and favored the re-invasion of exotic grass species. Our findings suggest that fire occurrence early in the restoration process may trigger exotic grass re-invasion driven by soil nutrient enrichment. To diminish the re-invasion risk from exotic grasses in savannas undergoing restoration, managers should beware of the early fire or manage soil fertility after fire events. Successful restoration may also benefit by incorporating native species with high post-fire recovery capacity.

Cerradoexotic invasive grassfire resiliencefunctional traitssavanna restoration

Andre L. Giles、Mateus C. Silva、Guilherme G. Mazzochini、Bernardo M. Flores、Lucy Rowland、Patricia de Britto Costa、Marcio B. Cure、Marcelo Monge、Isabel B. Schmidt、Anna Abrahao、Alexandre B. Sampaio、Claudomiro de Almeira Côrtes、Rafael S. Oliveira

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Departamento de Fitotecnia, Centro de Ciencia Agrarias, Universidade Federal de Santa Catarina, Florianopolis, Santa Catarina, Brazil||Universidade Estadual de Campinas (UNICAMP), Instituto de Biologia, Campinas,Sao Paulo, Brazil

Department of Geography, Faculty of Environment Society and Economy, University of Exeter, Exeter, U.K.

Universidade Estadual de Campinas (UNICAMP), Instituto de Biologia, Campinas,Sao Paulo, Brazil||Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

Department of Ecology and Zoology, Federal University of Santa Catarina,Florianopolis, Santa Catarina, Brazil

Universidade Estadual de Campinas (UNICAMP), Instituto de Biologia, Campinas,Sao Paulo, Brazil

Institute of Biology, Federal University of Uberlândia, Uberlândia, Minas Gerais,Brazil

Departamento de Ecologia, Universidade de Brasilia, Brasilia, Federal District, Brazil

Departamento de Biologia, Centro de Ciencias, Universidade Federal do Ceara,Fortaleza, Ceara, Brazil

Instituto Chico Mendes de Conservacaao da Biodiversidade, ICMBio, Brasilia,Federal District, Brazil, Brazil

Associac˜ao Cerrado de Pe, Alto Paraiso de Goias, Goias, Brazil

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2025

10.1111/rec.14295

Restoration ecology

Restoration ecology

ISSN：1061-2971
年,卷(期)：2025.33(3)
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