Urban tardigrades are studied little worldwide. In Salta (Argentina), two studies have evaluated their diversity in an urban–native gradient. Vehicular traffic in Salta city has increased over the last decade, increasing environmental pollution. Our aim is to determine whether biotic homogenization occurs in this city. Sampling sites were selected considering different vehicular traffic intensities (high, medium and low). Tardigrades were sampled from bryophytes growing on tree trunks. Specimens were treated according to the usual study methodology. Different biotic and environmental abiotic variables of the microhabitat were considered. A total of 3049 specimens of 16 species of heterotardigrades and eutardigrades were reported. The low vehicular transit habitat was more diverse than the others. Ordination analyses evidenced a nested pattern in the studied urban habitats. Milnesium sp. nov. 3 and Minibiotus sp. nov. 1 were reported as detector species for habitats with medium vehicular traffic. The partition of the β diversity showed that the species turnover was higher among low and high vehicular traffic communities than medium, whereas a loss of species was evidenced between high and medium habitats. The high diversity of tardigrades in Salta city and their assemblages are partly dependent on several factors, including vehicular traffic.

中文翻译：

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城市化对阿根廷Targradegrades社区的影响

在世界范围内对城市缓坡的研究很少。在萨尔塔（阿根廷），有两项研究评估了它们在城市本地梯度中的多样性。在过去的十年中，萨尔塔市的车辆交通有所增加，从而加剧了环境污染。我们的目标是确定该城市是否发生生物均质化。根据不同的车辆交通强度（高，中和低）选择采样地点。从树干上生长的苔藓植物中提取了缓坡植物。根据通常的研究方法对标本进行处理。考虑了微生境的不同生物和环境非生物变量。总共报告了30种标本，包括16种异戊二烯和正丁二烯。低机动车过境生境比其他人更多样化。镁sp。十一月 3和Minibiotus sp。十一月 据报导有1种是中等车辆通行的栖息地的检测物种。β多样性的划分表明，低，高车辆通行社区中的物种周转率高于中度，而高中度生境之间的物种流失得到了证实。萨尔塔市的节肢动物及其组成的高度多样性部分取决于几个因素，包括车辆通行。