Abstract Animal pollination is one of the most important ecosystem services that benefit both natural plant communities and plant crops. A failure in pollination service can result in pollen limitation of fruit and seed set. This scenario can be even worse in endangered ecosystems such as tropical dry forests. Pollen limitation is a way of measuring the reproductive performance of plants by comparing the output of natural pollination with that of supplemental hand cross-pollination. Studies have shown that pollen limitation can be moderated by plant traits, such as plant habit, mating system, pollinator dependence and floral specialisation. Herein, we carried out a meta-analysis to determine the magnitude of pollen limitation in 60 plant species from the Caatinga vegetation of the Brazilian seasonal dry forest. We found an overall mean pollen limitation of 0.41 and a prevalence of 35%. Trees, shrubs, and self-incompatible, pollinator dependent and generalist plants were pollen limited. We found a significant interaction between plant habit and floral specialisation. Specialist and generalist trees and generalist shrubs were pollen limited. Trees and shrubs are mostly threatened in the endangered Caatinga. Species that are not pollen limited, such as lianas and herbs, may also be indirectly threatened by deforestation and intensive farming.

中文翻译：

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植物性状相互作用以平衡巴西季节性干旱森林的花粉限制：荟萃分析

摘要 动物授粉是最重要的生态系统服务之一，对自然植物群落和植物作物都有好处。授粉服务失败会导致果实和种子集的花粉限制。在热带干旱森林等濒危生态系统中，这种情况可能更糟。花粉限制是一种通过比较自然授粉和补充手异花授粉的产量来衡量植物繁殖性能的方法。研究表明，花粉限制可以通过植物特性来调节，例如植物习性、交配系统、传粉媒介依赖性和花的特化。在此，我们进行了荟萃分析，以确定来自巴西季节性干旱森林的 Caatinga 植被的 60 种植物的花粉限制程度。我们发现总体平均花粉限制为 0.41，流行率为 35%。乔木、灌木和自交不相容、依赖传粉者和通才植物的花粉是有限的。我们发现植物习性和花卉特化之间存在显着的相互作用。专科和多科树木以及多科灌木花粉有限。在濒临灭绝的卡廷加，树木和灌木大多受到威胁。不受花粉限制的物种，如藤本植物和草本植物，也可能受到森林砍伐和集约化农业的间接威胁。在濒临灭绝的卡廷加，树木和灌木大多受到威胁。不受花粉限制的物种，如藤本植物和草本植物，也可能受到森林砍伐和集约化农业的间接威胁。在濒临灭绝的卡廷加，树木和灌木大多受到威胁。不受花粉限制的物种，如藤本植物和草本植物，也可能受到森林砍伐和集约化农业的间接威胁。