Geraldo de Brito Freire-Jr, André Elias-Paiva, Danilo Bandini Ribeiro, Raquel Fernandes Araujo, Chanchanok Sudta, Elizabeth S. de Araújo, Hernani F. M. Oliveira, Fabrício Escarlate-Tavares, Fabricius M. C. B. Domingos
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引用次数: 0
摘要
火灾极大地塑造了巴西塞拉多动植物的动态,但人类活动和气候变化的干扰破坏了自然火灾制度,危及多种动植物种群。我们的研究在Brasília-Brazil的Ecológica do Roncador reserve (rec - ibge)进行,研究了火灾频率和火灾后间隔对大草原林地果食蝴蝶多样性模式的影响。我们采集了16种蝴蝶1059只,其中最具代表性的是盲蝶科和沙棘科。与间隔较长的地点相比,火灾频率高、火灾后间隔短的地点具有更高的分类、功能和系统发育多样性。火后间隔期较长的地点主要以书目科为主,而火后间隔期较短的地点则以火苗科和杏花科为主。有翅膀眼斑的物种在最近发生火灾的地方繁衍生息。这些发现强调了火在维持开阔植被方面的关键作用,这对保护蝴蝶群落,特别是沙克辛类和沙克辛类蝴蝶至关重要。重要的是,灭火导致燃料堆积,增加了塞拉多发生严重野火的风险。总之,我们的研究结果强调了零火政策对昆虫群落的不利影响,包括在这个独特的生态系统中以水果为食的蝴蝶。
Fostering Biodiversity in Neotropical Savannahs: Fire as a Diversity Driver for Fruit-Feeding Butterfly Assemblages in the Cerrado
Fire has significantly shaped the dynamics of Brazilian Cerrado fauna and flora, but the interference of human activities and climate change has disrupted the natural fire regime, imperilling multiple animal and plant populations. Our study, performed at Reserva Ecológica do Roncador (RECOR-IBGE) in Brasília-Brazil, examined the influence of fire frequency and post-fire intervals on diversity patterns of fruit-feeding butterflies in savannah woodlands. We sampled 1059 individuals from 16 butterfly species, in which Biblidinae and Charaxinae were the most representative clades. Sites with higher fire frequency and shorter post-fire intervals exhibited higher taxonomic, functional and phylogenetic diversity compared to sites with longer intervals. Sites with longer post-fire intervals were primarily dominated by Biblidinae, whereas charaxines and satyrines mostly occurred in sites with shorter post-fire intervals. Species exhibiting wing eyespots thrived in sites with recent fires. These findings emphasise fire's pivotal role in maintaining open vegetation, crucial for conserving butterfly assemblages, particularly charaxines and satyrines. Importantly, fire suppression leads to fuel accumulation, elevating the risk of severe wildfires in the Cerrado. In conclusion, our results underscore the adverse impact of a zero-fire policy on insect communities, including fruit-feeding butterflies, within this unique ecosystem.
期刊介绍:
Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere.
Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region.
Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.