Spatial distribution and geochemical background of quartzitic and ferruginous rupestrian field soils

IF 5.4 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2024-09-24 DOI:10.1016/j.catena.2024.108369

Daniela Arcanjo Paiola Ferreira , Mariangela Garcia Praça Leite , Maria Cristina Teixeira Braga Messias , Maria Augusta Gonçalves Fujaco , Eduardo Duarte Marques , Lucas Mardones Gaião , Alessandra Rodrigues Kozovits

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引用次数: 0

Abstract

Recent changes in Minas Gerais (Brazil) environmental legislation increased the threats caused by mining activities on the conservation of ferruginous rupestrian fields (FRF). The permission to compensate areas to be degraded by others with different vegetation, if there is “ecological equivalence”, now allows that quartzitic rupestrian fields (QRF) can be used to compensate the suppression of FRF. This work provides scientific basis for discussing this issue using soil data (one of the main determinants of vegetation structure and diversity) from the Iron Quadrangle (IQ), a unique region where QRF and FRF share the same geological evolution that defined two deformational domains. Al, As, Ba, Cd, Cu, Fe, Mn, K, P, Pb and Zn geochemical background values were calculated in the QRF and FRF soils throughout the entire IQ and separately in its domains. FRF soils have significantly higher Fe and P average concentrations and background values, at least twice as those found in QRF. In turn, QRF soils present higher Ba, Cu and K average concentrations, with background values one order of magnitude higher. The high standard deviation of background values of some elements reflects the great heterogeneity of each lithotype soil, leading to non-significant differences, as for Al (FRF=51,025 mg.kg⁻¹, QRF=18,100 mg.kg⁻¹). Geological evolution that created IQ domains seems to have exert a strong influence on the geochemistry of rupestrian fields (RF) soils, as first demonstrated in this study. In the western, Al, Ba, K, Mn, Pb and Zn average concentrations are significantly higher. FRF in mid-eastern IQ region stand out for the highest Ba, Cd, Pb and Zn concentrations. Considering differences observed between QRF and the FRF soils and the influence of edaphic parameters on the vegetation structure and species composition of RF, it becomes evident that these areas should not be automatically defined as ecological equivalents.

查看原文本刊更多论文

石英质和铁锈质冲积平原土壤的空间分布和地球化学背景

米纳斯吉拉斯州（巴西）环境立法的最新变化增加了采矿活动对铁锈斑岩地（FRF）保护的威胁。如果存在 "生态等同性"，允许用植被不同的其他区域来补偿退化的区域，现在可以用石英质铁锈田（QRF）来补偿铁锈田的退化。这项工作利用铁四角区（IQ）的土壤数据（植被结构和多样性的主要决定因素之一）为讨论这一问题提供了科学依据，铁四角区是一个独特的地区，QRF 和 FRF 具有相同的地质演变过程，确定了两个变形域。计算了整个 IQ 地区的 QRF 和 FRF 土壤中的铝、砷、钡、镉、铜、铁、锰、钾、磷、铅和锌地球化学背景值，并分别计算了各区域的背景值。FRF 土壤中铁和磷的平均浓度和背景值明显较高，至少是 QRF 土壤的两倍。而 QRF 土壤中的钡、铜和钾平均浓度较高，背景值也高出一个数量级。某些元素的背景值标准偏差很大，反映出每种岩性土壤的差异很大，导致差异不显著，如铝（FRF=51,025 毫克/千克-1，QRF=18,100 毫克/千克-1）。正如本研究首次证明的那样，形成 IQ 区域的地质演化似乎对芦笋田（RF）土壤的地球化学有很大影响。在西部，Al、Ba、K、Mn、Pb 和 Zn 的平均浓度明显较高。中东部 IQ 地区的 FRF 尤以 Ba、Cd、Pb 和 Zn 的浓度最高。考虑到观察到的 QRF 和 FRF 土壤之间的差异，以及环境参数对 RF 植被结构和物种组成的影响，这些地区显然不应被自动定义为生态等同区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.