Remnants of Semideciduous Atlantic Forest surrounded by numerous industries, intense road traffic and agricultural lands in Southeast Brazil have been affected by trace elements. We implemented a passive biomonitoring with the three most abundant native tree species (Astronium graveolens, Croton floribundus and Piptadenia gonoacantha) to answer these questions: 1) which species has the greatest potential to accumulate trace elements?; 2) does the leaf accumulation level of trace elements vary between the edge and interior of the forest remnants, between dry and wet periods or due to the distance from the industrial area?; 3) which species, among the most abundant in the forest remnants, would better indicate the spatial variations in trace elements pollution and which elements would be the most relevant for such spatial discrimination? Leaf samples were collected during the dry and wet seasons, at the edge and interior of four forest remnants. Trace elements were determined using inductively coupled plasma mass spectrometry (ICP MS). Few edge effects were evidenced in the leaf concentrations in all species. Higher concentrations of most trace elements were measured during dry season. Although C. floribundus showed the most accumulating capacity, A. graveolens was the most appropriate species to discriminate spatial variations. The forest closer to the industrial area was distinguished from the others by Mn and Ni from oil burning, but the metal pollution from the industrial area did not interfere on the leaf concentrations in A. graveolens sampled in the urban and rural forests.

在巴西东南部，半落叶的大西洋森林的残余物被众多产业，密集的公路交通和农业用地所包围，受到微量元素的影响。我们对三种最丰富的本地树种（天竺葵，巴豆，花Cro和Piptadenia gonoacantha）实施了被动生物监测）回答以下问题：1）哪种物种最有可能积累微量元素？2）微量元素的叶片积累水平在森林残余物的边缘和内部，干旱和潮湿时期之间还是由于与工业区的距离而变化吗？3）在森林残留物中最丰富的物种中，哪种物种能更好地表明痕量元素污染的空间变化，哪些元素与这种空间歧视最相关？在干燥和潮湿的季节，在四个森林残余物的边缘和内部收集叶片样品。痕量元素使用电感耦合等离子体质谱法（ICP MS）测定。在所有物种的叶片浓度中几乎没有边缘效应被证明。在干旱季节，大多数痕量元素的含量较高。虽然C. floribundus的积累能力最强，而A.gravololens是区分空间变异的最合适的物种。靠近工业区的森林通过燃烧燃油中的Mn和Ni而与其他森林区分开来，但是工业区的金属污染并未干扰城市和乡村森林中采摘的A.gravolens的叶片浓度。