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Título
Study of the vegetation cover of an environment contaminated by heavy metal sulphides: strategies and specific distribution
Autor
Facultad/Centro
Área de conocimiento
Asignaturas
International Conference Contaminated Sites 2022
Datos de la obra
Juan A. Campos, Villena, J., Eva M. García-Noguero, Castro, H., Moreno, M., & Higueras, P. (2022). Study of the vegetation cover of an environment contaminated by heavy metal sulphides: strategies and specific distribution. International Conference Contaminated Sites 2022, 118-122.
Editor
Agencia eslovaca del medio ambiente
Fecha
2022
Abstract
[EN] After the extraction of sulfide minerals such as galena, sphalerite and pyrite for decades, the abandoned minesites are a sort of mosaic of different substrates related with the different activities carried out on mineral management and processing. After the exploitation time, a slow but steady natural colonization starts by a select group of species, resilient enough to the very harsh conditions. The presence of high levels of heavy metals, acidic pH and a poor water retention are the key limiting factors. The list of the species and their specific role in the colonization strategies have been studied with the aim of determining the physiological or ecological mechanisms involved in overcoming the environmental restrictions. Phragmites australis can be considered as a pioner species, colonizing first the substrate and creating the necessary conditions for other species to stablish themselves in the area. This species creates a shallow network of rhizomes that allows the accumulation of resources (organic matter, finer mineral particles, etc.) that will ease the germination and growth of other species, specially Retama sphaerocarpa. We have observed some interspecific strategies that lead to the improvement of edaphic conditions, increasing the organic matter content, favoring compaction, water retention and some enzymatic activities linked to microbial activity. This study draws predictions on the hypothetical ability to gerenate resources by plants and how different soil types alter plant strategies to achieve a sustainable plant cover, despite trenchant environmental constraints.The general objective of this study is to gather knowledge to understand the relationship between soil properties and species distribution in harsh environment.
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