Role of above- and belowground traits in the functional structure and species dominance of tropical fern communities in response to edge effects

IF 1 4区 生物学 Q3 PLANT SCIENCES
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Abstract

Recent investigations have revealed the coordination and trade-offs between above- and belowground traits in structuring functional strategies of plant communities, but none of these have addressed ferns, a diverse plant lineage in tropical forests. We investigated terrestrial ferns from the perspective of how below- and aboveground traits are coordinated with functional responses to forest edges, which represent a significant part of the world’s forest cover. Specifically, we examined differences in functional strategies between forest edges and forest interior as well as traits associated with species dominance. Fern richness and abundance were sampled in 24 edge plots and 44 interior plots within the Brazilian Atlantic Forest. We obtained data for five leaf traits and three rhizome traits. Ferns did not express any functional coordination between above- and belowground traits. At the edge, ferns did not display functional homogenization. In both the interior and at the edge, ferns exhibited multiple trait covariations across a broad spectrum of plant sizes and leaf numbers, associated with rhizome type and the presence of leaf trichomes and stolons. There were no cohesive functional groups of generalists or of exclusive species of forest edges and the forest interior. Fern species dominance was related to the species-specific number of leaves and the presence of stolons. We conclude that below- and aboveground traits did neither respond in conjunction nor as a functional response to edge effects. However, both kinds of traits affected the functional structure and species dominance of fern communities at the edge and in the interior of the forest.

地面和地下特征在热带蕨类群落的功能结构和物种优势中对边缘效应的作用
摘要 近期的研究揭示了地上和地下性状在构建植物群落功能策略中的协调和权衡,但这些研究都没有涉及蕨类植物--热带雨林中的一个多样化植物品系。我们从地下和地上性状如何与森林边缘的功能反应相协调的角度研究了陆生蕨类植物,森林边缘在世界森林覆盖中占有重要地位。具体来说,我们研究了森林边缘和森林内部功能策略的差异,以及与物种优势相关的特征。我们在巴西大西洋森林的 24 个边缘地块和 44 个内部地块对蕨类植物的丰富度和丰度进行了采样。我们获得了五种叶片特征和三种根茎特征的数据。蕨类植物在地上和地下性状之间没有表现出任何功能上的协调。在边缘地带,蕨类植物没有表现出功能同质化。在内部和边缘,蕨类植物在植株大小和叶片数量的广泛范围内表现出多种性状共变,这与根茎类型以及叶片毛状体和匍匐茎的存在有关。森林边缘和森林内部并不存在一致的通性或专性物种功能群。蕨类物种的优势与特定物种的叶片数量和匍匐茎的存在有关。我们的结论是,地下和地上性状对边缘效应既没有联合反应,也没有功能反应。然而,这两种性状都影响了森林边缘和内部蕨类群落的功能结构和物种优势。
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来源期刊
Folia Geobotanica
Folia Geobotanica 生物-植物科学
CiteScore
2.40
自引率
0.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: The journal Folia Geobotanica publishes articles in vegetation science, plant ecology and plant systematics, including the topics of temporal community patterns, population and ecosystem ecology, and invasion and conservation ecology. Within the field of plant systematics, Folia Geobotanica welcomes papers on systematic and evolutionary botany, including phylogenetic reconstructions, phylogeographic and biogeographic inferences, studies of microevolutionary processes, taxonomic studies, and broader taxonomic revisions.
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