Abstract The ecological performance of different plant species in a given ecosystem is associated with their functional traits. Plants may adopt ecological strategies to optimize resources’ acquisition and use in resource-poor environments, such as sandplain (restinga) forests. The CSR theory points out the three main types of ecological strategies observed in plants: competitors ("C"); tolerant to stresses ("S") and ruderals ("R"). The aim of the current study is to evaluate: i) the CSR strategies used by dominant species in restinga environments; ii) the functional traits mostly associated with plants’ ecological strategies and trade-offs between traits; iii) whether the functional traits or percentage of CSR strategies can explain plant species importance value. We evaluated the relative proportions of CSR strategies using the StrateFy tool and if the set of functional traits (leaf and wood) was associated with species’ importance value. According to the CSR model, the investigated species were highly tolerant to stress. Sandplain forest species showed different sets of traits and trade-offs influencing their performance. The investigated species showed variation in their strategies, such as the combination of traits capable of assuring high environmental resistance, traits associated with structural defenses and traits capable of assuring higher water storage capacity. The importance value of species in sandplain were related to the set of leaf and wood traits. Results showed that despite the convergency in CSR strategies, the investigated plants species presented a diversity of traits combination and trade-offs capable of enabling stress tolerance in sandplain forests.

中文翻译：

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亚马逊沙平原木本树种的CSR生态策略、功能性状与权衡

摘要 不同植物物种在特定生态系统中的生态表现与其功能特性有关。植物可以采用生态策略来优化资源贫乏环境中的资源获取和使用，例如沙平原（restinga）森林。CSR 理论指出了在植物中观察到的三种主要生态策略类型：竞争者（“C”）；耐受压力（“S”）和粗暴（“R”）。当前研究的目的是评估：i) 优势物种在 restinga 环境中使用的 CSR 策略；ii) 主要与植物生态策略相关的功能性状以及性状之间的权衡；iii) CSR 策略的功能性状或百分比是否可以解释植物物种的重要性价值。我们使用 StrateFy 工具评估了 CSR 策略的相对比例，以及功能特性集（叶和木）是否与物种的重要性值相关联。根据CSR模型，被调查的物种对压力具有高度耐受性。沙平原森林物种表现出不同的特性和影响其性能的权衡。被调查的物种表现出其策略的变化，例如能够确保高环境抵抗力的特征、与结构防御相关的特征以及能够确保更高储水能力的特征的组合。沙原物种的重要价值与叶木性状的集合有关。结果表明，尽管企业社会责任战略趋同，