The concentration of As, Pb, Cd, Zn, Fe, Mn, and Cu and the Sr and Pb isotopic compositions were determined in four species of the vascular epiphyte Tillandsia (T. caput medusae, T. ionantha, T. recurvata, and T. sp), to evaluate their capacity to biomonitor the air quality and the sources of lithogenic particles and toxic elements in a severely contaminated site from the mining region of Taxco de Alarcón, Guerrero (southern Mexico). With the exception of Cu, mean concentrations are typically higher in the contaminated site relative to a reference (uncontaminated) site, and the incrustation of metal-bearing particles (mainly PM₁₀ and PM_2.5) on leaves and roots seems to be the most significant mechanism of incorporation of these pollutants to plants. The Sr isotopic composition indicated that surrounding lithology is the main source of lithogenic particles, whereas statistical tools and Pb isotope ratios revealed a genetic link of toxic elements in epiphytes with Taxco ores and mining wastes, which confirm the capacity of the evaluated epiphytes to record local environmental conditions. The presence of abundant metal-bearing particles, particularly in the PM_2.5, may represent a serious threat to the health of wild fauna, livestock, and humans in the zone. The study demonstrated that vascular epiphytes of the Tillandsia genus could be used as an efficient, low-cost, biotechnological tool for monitoring the air quality in severely contaminated polymetallic sites such as mining and smelting zones, as well as for sourcing lithogenic and metal-bearing particles.

砷，铅，镉，锌，铁，锰，和Cu以及Sr和Pb同位素组合物的浓度在四种血管真菌的测定铁兰（T.蛇头，T.紫罗兰，T. recurvata和Ť （ sp.sp.），以评估其对来自格雷罗（墨西哥南部）的塔斯科·德·阿拉尔孔（Taxco deAlarcón）采矿区受严重污染的场所进行空气质量监测以及生石颗粒和有毒元素来源的生物监测能力。除铜外，受污染部位的平均浓度通常比参考（未受污染）部位高，并且含金属颗粒（主要是PM ₁₀和PM _2.5）结垢）在叶和根上似乎是将这些污染物掺入植物的最重要机制。Sr同位素组成表明，周围的岩性是成岩颗粒的主要来源，而统计工具和铅同位素比揭示了附生植物中的有毒元素与塔斯科矿石和采矿废物之间的遗传联系，这证实了所评估的附生植物记录当地植物的能力。环境条件。富含金属的颗粒（尤其是在PM _2.5中）的存在可能对该区域的野生动植物，牲畜和人类的健康构成严重威胁。研究表明，铁兰的附生植物 属可以用作一种高效，低成本的生物技术工具，用于监测严重污染的多金属站点（例如采矿和冶炼区）中的空气质量，以及用于采购成岩和含金属的颗粒。