亚马逊西北部边境地区可培养生物气溶胶及其环境驱动因素的研究

IF 3.4 Q2 ENVIRONMENTAL SCIENCES
Lizeth Russy-Velandia , Omar Ramírez , Jaime Barrera , Sebastián Mendoza-Téllez , Harry Álvarez , María Camila Patiño , Luis A. Ladino
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引用次数: 0

摘要

这项研究首次表征了亚马逊西北地区可培养的生物气溶胶,包括真菌和细菌。在2024年3月从干湿季节过渡期间,在哥伦比亚的Guaviare进行了采样。生物气溶胶收集装置(MAS-100生态影响器)放置在离地面7米的地方,以尽量减少土壤颗粒再悬浮的影响,并确保对生物气溶胶的可靠评估。结果表明,真菌浓度(642 CFU/m3)显著高于细菌浓度(228 CFU/m3)。湿度对这些微生物的早晨峰值水平有显著影响(p < 0.05)。真菌群落以裂叶菌和赫quei青霉为主,细菌群落以节杆菌、出口杆菌和帕瓦尼窄养单胞菌为主。微生物群落组成在一天中有时间变化,以厚壁菌门(56.4%)和子囊菌门(53.7%)为主。值得注意的是,存在与人类相关的物种,如腐生葡萄球菌。利用HYSPLIT模型进行的气团轨迹分析表明,49.5%的空气样本来自哥伦比亚和委内瑞拉的东北部平原,36.2%来自巴西亚马逊的东南部。这些发现表明,亚马逊西北部的空气微生物群落受区域气团和当地环境条件的影响,反映了自然和人为的影响。本研究为利用生物气溶胶作为生态破碎化的生物指标建立了基线,并强调了扩大生物监测网络以在空间和时间上跟踪这一重要生物群系中的微生物多样性的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Approach to culturable bioaerosols and their environmental drivers at a border site in the northwestern Amazon
This study represents the first characterization of culturable bioaerosols, including fungi and bacteria, in the northwestern Amazon region. Sampling was conducted in Guaviare, Colombia, during the seasonal transition from the dry to the wet period in March 2024. The bioaerosol collection device (MAS-100 Eco impactor) was positioned 7 m above ground level to minimize the influence of soil particle resuspension and ensure a reliable assessment of bioaerosols. Results showed that fungal concentrations (642 CFU/m3) were significantly higher than bacterial concentrations (228 CFU/m3). Humidity significantly influenced the morning peak levels of these microbes (p < 0.05). Fungal communities were predominantly composed of Schizophyllum commune and Penicillium herquei, while bacterial communities were predominantly composed of Arthrobacter sp., Exiguobacterium sp., and Stenotrophomonas pavani. The microbial community composition varied temporally throughout the day, with Firmicutes (56.4 %) and Ascomycota (53.7 %) predominating. Notably, human-associated species such as Staphylococcus saprophyticus were present. Air mass trajectory analysis using the HYSPLIT model indicated that 49.5 % of sampled air originated from the northeastern plains of Colombia and Venezuela, while 36.2 % came from the southeastern Brazilian Amazon. These findings suggest that airborne microbial communities in the northwestern Amazon are shaped by regional air masses and local environmental conditions, reflecting both natural and anthropogenic influences. This study establishes a baseline for employing bioaerosols as bioindicators of ecological fragmentation and highlights the need to expand biomonitoring networks to track microbial diversity spatially and temporally in this vital biome.
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来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
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