Metal pollution in Spanish terrestrial ecosystems during the twentieth century.
We show here additional biological evidence of the alteration in global biogeochemistry by human activities during the twentieth century. The mineral concentration of herbarium specimens of 24 species of vascular plants and three species of bryophytes collected in North and East regions of Spain have substantially changed throughout the twentieth century. While V, a proxy tracer of oil pollution, exponentially increased in the last decades, other metals such as Cr, Ba, Sr, Al, Fe, Pb, Cd and Ti increased up to 1960-1970 and started to decrease in 1985-1995, when environmental legal regulations started to be effective. Multivariate principal component analysis showed an overall change in plant elemental concentrations throughout the different decades of the century and a clear separation of vascular plants and bryophytes. Likely important consequences for ecosystem structure and functioning and even for human health may be expected from these changes in mineral concentration.
Peñuelas
Josep
J
CSIC-CREAF Ecophysiology Unit, Center for Ecological Research and Forestry Applications (CREAF), Edifici C, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. josep.penuelas@uab.es
Filella
Iolanda
I
D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis* / Q000493:pharmacokinetics; D010944:Plants / Q000737:chemistry*; D011634:Public Health; D011640:Public Policy; D012189:Retrospective Studies; D013030:Spain
D004785:Environmental Pollutants; D019216:Metals, Heavy