Urbanisation is expected to function as a filter for plant species by changing the physiochemical environment, causing species turnover along an urbanisation gradient. Analyses of the functional traits of species characteristic of different urbanisation levels allow for comparisons across studies, irrespective of exact species composition. This study aims to examine how plant species and functional traits vary with urbanisation. An independent dataset obtained through the Global Biodiversity Information Facility was used to validate the identified indicator species. The study was performed in Trondheim, Norway. Indicator species of two different urbanisation levels were identified from a structured plot vegetation survey, and their functional traits were contrasted. The functional trait patterns were compared to patterns identified from an independent GBIF dataset. Changes in species composition along the urbanisation gradient identified a shift in environmental‐ and anthropogenic variables, filtering species with different functional traits. Indicators of urban areas displayed higher SLA, nitrogen affinity and disturbance tolerance than indicators from non‐urban areas. Not all functional trait differences observed between the indicator species from the vegetation survey were recognised in the independent dataset from GBIF. Nevertheless, the overall trends were consistent. Urbanisation favours species adhering to different trait syndromes than species outside of urban areas; disturbance‐over stress‐tolerance, and species adapted for rapid resource acquisition rather than species adapted for resource conservation.

中文翻译：

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竞争者和徒前往城镇：沿城市化梯度的植物群落组成和功能

预计城市化将通过改变其物理化学环境来充当植物物种的过滤器，从而沿城市化梯度引起物种更新。对不同城市化水平的物种特征的功能性状进行分析后，可以进行跨研究的比较，而不必考虑确切的物种组成。这项研究旨在研究植物种类和功能性状如何随城市化而变化。通过全球生物多样性信息基金获得的独立数据集用于验证已确定的指标物种。该研究在挪威特隆赫姆进行。从结构化样地植被调查中确定了两种不同城市化水平的指示物种，并对其功能特征进行了对比。将功能性状模式与从独立GBIF数据集识别的模式进行了比较。沿着城市化梯度的物种组成变化确定了环境和人为变量的变化，过滤了具有不同功能性状的物种。与非城市地区的指标相比，城市地区的指标显示出更高的SLA，氮亲和力和抗干扰性。在来自GBIF的独立数据集中，并不是从植被调查中观察到的指标物种之间观察到的所有功能性状差异都没有得到识别。然而，总体趋势是一致的。与城市地区以外的物种相比，城市化更倾向于具有不同性状的物种。压力容忍干扰