Pirinioetako altuera handiko lakuetako sedimentuak, inguruko kutsadura metalikoaren adierazle
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Abstract
Pirinioetako altuerako aintzirak oso ekosistema aproposak dira kutsadura kimikoaren ondorioz gerta daitezkeen aldaketak aztertzeko eta kuantifikatzen saiatzeko. Helburu horrekin sedimentuzko zutabeak bildu genituen 2013ko udan Pirinioetako altuerako 18 aintziretan eta 24 metalen kontzentrazioak neurtu ziren zutabe guztietan, geruzetan banatu ondoren. Lortutako emaitzen tratamendu estatistikoa (korrelazio-analisia) eta kimiometrikoa (Osagai Nagusien Analisia) egin genuen. Gainazaleko sedimentuetan aintzirak 5 talde desberdinetan banatzen ziren metal kontzentrazioen antzekotasunak kontutan izanda. Zn-Cd, Pb-Sb eta Ni-Co elementuen arteko korrelazio esanguratsuak (%95eko konfiantza-mailan) adierazi ziren. Estelat eta Romero de Dalt aintziretan lortutako sedimentuzko zutabe sakonak erabili ziren inguru horietako kutsadura historikoa eta ekarpen antropogenikoa aztertzeko.
High altitude lakes in the Pyrenees are very sensitive ecosystems to detect and quantify chemical pollution. With this aim, sediment samples were collected in 18 high altitude Pyrenean lakes in summer 2013. The concentration of 24 elements was measured in all the samples. Statistic (correlation analysis) and chemometric (Principal Component Analysis) treatment of the results were carried out. 5 different clusters of lakes were identified according to their metal content in the surface sediments. Significant correlations (at 95% confidence level) were detected for Zn-Cd, Pb-Sb eta Ni-Co. Sediment deep cores of Estelat and Romero de Dalt lakes were investigated to find out the anthropogenic origin and historical record of the metal pollution.
High altitude lakes in the Pyrenees are very sensitive ecosystems to detect and quantify chemical pollution. With this aim, sediment samples were collected in 18 high altitude Pyrenean lakes in summer 2013. The concentration of 24 elements was measured in all the samples. Statistic (correlation analysis) and chemometric (Principal Component Analysis) treatment of the results were carried out. 5 different clusters of lakes were identified according to their metal content in the surface sediments. Significant correlations (at 95% confidence level) were detected for Zn-Cd, Pb-Sb eta Ni-Co. Sediment deep cores of Estelat and Romero de Dalt lakes were investigated to find out the anthropogenic origin and historical record of the metal pollution.
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Pirinioak; sedimentuak; kutsadura metalikoa; altuera handiko aintzirak; naturala; antropogenikoa, Pyrenees; sediments; metal pollution; high altitude lakes; natural; anthropogenic