Richness, coverage and concentration of heavy metals in vascular epiphytes along an urbanization gradient
| Autor: | Jairo Lizandro Schmitt, Diego Fedrizzi Petry Becker, Rafael Linden |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Environmental Engineering chemistry.chemical_element Zinc 010501 environmental sciences 010603 evolutionary biology 01 natural sciences Metals Heavy Urbanization Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences Cadmium Tillandsia biology Ecology Spectrophotometry Atomic biology.organism_classification Pollution Plant Leaves chemistry Environmental chemistry Environmental science Tillandsia recurvata Epiphyte Species richness Bioindicator Brazil Environmental Monitoring |
| Zdroj: | Science of The Total Environment. :48-54 |
| ISSN: | 0048-9697 |
| Popis: | Richness, coverage and concentration of heavy metals in vascular epiphytes were analyzed in isolated trees along an urbanization gradient in Southern Brazil. A total of 20 phorophytes were sampled in the main street of each site. Concentrations of chromium, cadmium, lead, manganese, nickel and zinc were measured in the leaves of Tillandsia recurvata L. using Graphite Furnace Atomic Absorption Spectrophotometry. A decreasing gradient of epiphyte richness and coverage was observed as urbanization increased. Vehicle fleet and demographic density were the parameters most correlated with the reduction of epiphytic diversity. In T. recurvata, significantly higher values of cadmium, lead and zinc were recorded in the most urbanized areas, and were strongly related to the vehicle fleet and to the demographic density in these sites. The results demonstrated that these parameters could be applied to the diagnosis of environmental quality in urban areas, allowing standardized analyses in other regions. |
| Databáze: | OpenAIRE |
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