Altitudinal variation of trace elements deposition in forest ecosystems along the NW side of Mt. Amiata (central Italy): Evidence from topsoil, mosses and epiphytic lichens
Section snippets
Credit author statement
Ancora S: Methodology, Resources, Writing – Review & Editing. Dei R.: Resources, Investigation. Rota E: Formal analysis; Writing – Review & Editing. Mariotti G: Investigation, Validation. Bianchi N: Validation, Formal analysis. Bargagli R: Conceptualization, Writing – original draft, Review & Editing, Supervision.
Study area
Mt. Amiata (1738 m a.s.l.; 42°53′N 11°37′E) originated in the late Pleistocene (about 300–230 kyr ago) from volcanic activity (Laurenzi et al., 2015) and isolation is one of its peculiar features. Starting from an altitude of about 700 m a.s.l., volcanic materials (mostly porphyric trachydacites and trachyandesites with sanidine mega-crystals) rest unconformably on structurally complex Neogene tectono-sedimentary deposits. The southern and eastern slopes of the mountain are characterized by
Fine fraction of topsoil
Mean Pb, Hg and Cd concentrations in topsoil samples from beech woods were higher than those in chestnut and oak woods, whereas samples from woods on calcareous substrata (below 700 m a.s.l.) had higher and significantly interrelated Al, Fe, Cu and Zn concentrations (Table 2 and Suppl. Table 1). Although significant relationships (p < 0.05) were found between Hg, Cd and Pb concentrations (Suppl. Table 1), only the distribution pattern of Pb along the mountain slope showed a significant positive
Discussion
Although rather variable, the concentrations of Al, Cd, Cu, Fe, Mn and Zn in the fine fraction of topsoils from the northwestern side of Mt. Amiata (Table 2) were mostly in the same range as, and the Hg and Pb content was slightly higher than, those reported for forest soils (e.g. Kabata-Pendias, 2010). The elemental composition of epiphytic lichens (Table 3) agrees with the results of previous biomonitoring surveys performed in forest ecosystems of central Italy by using the same lichen
Conclusions
Mt. Amiata is a cone-shaped and isolated mountain in central Italy and is characterized by steep altitudinal gradients of temperature and precipitation and succession of oak, chestnut and beech woods. The latter grow above 1200–1300 m of altitude on volcanic substrata and in agreement with the results of previous surveys on topsoils collected along the slopes of mountain ecosystems, our study shows that also in a very isolated mountain, far from significant anthropogenic sources of trace
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Lichen biomonitoring of airborne trace elements in the industrial-urbanized area of eastern algiers (Algeria)
2023, Atmospheric Pollution ResearchCitation Excerpt :It was not unexpected that heavy metals and rare earths concentrations in Pseudevernia furfuracea lichen transplants are significantly higher in all selected urban-industrial sites of Rouiba−Reghaia region relative to the Reghaia Nature Reserve and the Theniet El-Had control site. In this latter regard, background elements concentrations found at the TH site are plausible control levels (Bergamaschi et al., 2004; Ancora et al., 2021) in agreement with the literature values obtained in unpolluted sites worldwide listed in Table S5 (Freitas et al., 1993; Adamo et al., 2003; Culicov and Yurukova, 2006; Malaspina et al., 2014; Pantelica et al., 2016). Indeed, lichen biomonitoring studies, including the present investigation, have identified Al, Fe, and, in a lesser extent, Mn and Zn, as the major contributors to the contemporary background atmospheric burden.
Peer review under responsibility of Turkish National Committee for Air Pollution Research and Control.