Escobar Indra Elena C, Santos Vilma M, da Silva Danielle Karla A, Fernandes Marcelo F, Cavalcante Uided Maaze T, Maia Leonor C
Programa de Pós-Graduação em Biologia de Fungos, Departamento de Micologia, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Recife, PE, 50740-600, Brazil,
Environ Manage. 2015 Jun;55(6):1433-45. doi: 10.1007/s00267-015-0470-8. Epub 2015 Mar 31.
The aim of this study was to describe the impact of re-vegetation on the restoration of microbial community structure and soil microbiological properties in sand dunes that had been affected by mining activity. Soil samples were collected during the dry and rainy seasons from a chronosequence (1, 9, 21 years) of re-vegetated dunes using a single preserved dune as a reference. The composition of the fatty acid methyl esters and soil microbial properties were evaluated. The results showed that the changes in microbial community structure were related to seasonal variations: biomarkers of Gram-positive bacteria were higher than Gram-negative bacteria during the dry season, showing that this group of organisms is more tolerant to these stressful conditions. The microbial community structure in the natural dune was less affected by seasonal variation compared to the re-vegetated areas, whereas the opposite was observed for microbiological properties. Thus, in general, the proportion of saprobic fungi was higher in the natural dune, whereas Gram-negative bacteria were proportionally more common in the younger areas. Although over time the re-vegetation allows the recovery of the microbial community and the soil functions, these communities and functions are different from those found in the undisturbed areas.
本研究的目的是描述植被恢复对受采矿活动影响的沙丘微生物群落结构恢复和土壤微生物特性的影响。在旱季和雨季，从一个植被恢复沙丘的时间序列（1年、9年、21年）中采集土壤样本，并以一个未受干扰的沙丘作为对照。对脂肪酸甲酯的组成和土壤微生物特性进行了评估。结果表明，微生物群落结构的变化与季节变化有关：旱季革兰氏阳性菌的生物标志物高于革兰氏阴性菌，表明这类生物体对这些压力条件更具耐受性。与植被恢复区相比，天然沙丘的微生物群落结构受季节变化的影响较小，而微生物特性则相反。因此，总体而言，天然沙丘中腐生真菌的比例较高，而革兰氏阴性菌在较年轻的区域中比例更为常见。虽然随着时间的推移，植被恢复使微生物群落和土壤功能得以恢复，但这些群落和功能与未受干扰地区的不同。
