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A wildfire in an Amazonian canga community maintained important ecosystem properties
International Journal of Wildland Fire ( IF 3.1 ) Pub Date : 2020-01-01 , DOI: 10.1071/wf20033
Luciula Cunha Barbosa , Pedro Lage Viana , Grazielle Sales Teodoro , Cecílio Frois Caldeira , Silvio Junio Ramos , Markus Gastauer

Because wildfires alter plant communities, we describe the effects of a single fire event on the composition and diversity of Amazonian ferruginous savannas, locally known as cangas. We installed 20 observation plots in burned and unburned parts of a homogeneous canga site from the Carajas Massif. The single fire event shifted community composition slightly, increased functional richness and the abundance of anemochoric and subshrub species, but did not influence the number of phanerophyte species, highlighting the importance of both seeding and resprouting strategies in the post-fire scenario. In contrast, neither taxonomic nor phylogenetic diversity was affected by the fire event. The absence of differences in the phylogenetic community structure indicated that specific adaptations to fires are widespread within the canga phylogeny, although fires are not an eminent part of these ecosystems, as in other neotropical savannas. As diversity metrics were not negatively affected by a single fire event and only small shifts in species composition were observed, our data indicate maintenance of important ecosystem properties despite an occasional wildfire event in the analysed canga shrubland. Further research should outline how different physiognomies are affected and how different fire regimes influence communities to assist in the design of effective management plans for this ecosystem.

中文翻译:

亚马逊 Canga 社区的一场野火保持了重要的生态系统特性

由于野火改变了植物群落,我们描述了单一火灾事件对亚马逊铁质稀树草原(当地称为 cangas)的组成和多样性的影响。我们在 Carajas Massif 的同质 Canga 遗址的燃烧和未燃烧部分安装了 20 个观察地块。单次火灾事件略微改变了群落组成,增加了功能丰富度和风叶植物和亚灌木物种的丰度,但不影响显性植物物种的数量,突出了火灾后情况下播种和重新发芽策略的重要性。相比之下,分类学和系统发育多样性都不受火灾事件的影响。系统发育群落结构没有差异表明对火的特定适应在 canga 系统发育中广泛存在,尽管火灾不像其他新热带稀树草原那样是这些生态系统的重要组成部分。由于多样性指标不受单一火灾事件的负面影响,并且仅观察到物种组成的微小变化,我们的数据表明,尽管分析的坎加灌木丛中偶尔发生野火事件,但重要的生态系统特性得以维持。进一步的研究应概述不同的地貌如何受到影响以及不同的火灾制度如何影响社区,以协助为该生态系统设计有效的管理计划。我们的数据表明,尽管所分析的坎加灌木丛中偶尔会发生野火事件,但重要的生态系统特性得到了维护。进一步的研究应概述不同的地貌如何受到影响以及不同的火灾制度如何影响社区,以协助为该生态系统设计有效的管理计划。我们的数据表明,尽管所分析的坎加灌木丛中偶尔会发生野火事件,但重要的生态系统特性得到了维护。进一步的研究应概述不同的地貌如何受到影响以及不同的火灾制度如何影响社区,以协助为该生态系统设计有效的管理计划。
更新日期:2020-01-01
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