Geochemistry and microbiology of tropical serpentine soils in the Santa Elena Ophiolite, a landscape-biogeographical approach.
Geochemistry and microbiology of tropical serpentine soils in the Santa Elena Ophiolite, a landscape-biogeographical approach.
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DOI：
10.1186/s12932-022-00079-5
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发表时间：
2022-09-27
影响因子：
2.3
通讯作者：
中科院分区：
文献类型：
--
作者：
圣埃莱纳蛇绿岩是哥斯达黎加一个研究较好的超镁铁质系统，主要由橄榄岩组成。在这里，热带气候条件促进了活跃的红土形成过程，但由此产生的蛇纹石土壤的地球化学仍然知之甚少。本研究的目的是描述该地区对比景观的土壤地球化学组成和微生物群落，作为开始探索那里发生的金属地球化学的基础。土壤被确认为富含镍的蛇纹岩土壤，但不同的蛇纹岩区域内的地理位置，显示三个蛇纹岩土壤类型。风化过程导致山区土壤富含钴、锰和镍等微量金属。低地表现出地球化学的变化，尽管共享相似的景观：蛇绿岩带内的低地土壤更像周围的山地土壤，而不是北部低地土壤在蛇绿岩区的边界，在同一个河岸盆地，微量金属的浓度更高的下游朝向红树林区。微生物群落组成反映了土壤地球化学组成的差异，揭示了潜在的地质微生物输入当地金属地球化学：铁氧化还原循环细菌在山区土壤中更丰富，而更多的锰氧化细菌被发现在低地，最高的相对丰度在红树林地区。圣埃莱纳半岛的蛇纹石土壤中记录的基本生态协会及其作为蛇纹石化特有热点的潜力表明，这是一个研究热带蛇纹石区的地球化学，地球微生物学和生态学的模型网站。在线版本包含补充材料，可通过10.1186/s12932-022-00079-5获得。
The Santa Elena Ophiolite is a well-studied ultramafic system in Costa Rica mainly comprised of peridotites. Here, tropical climatic conditions promote active laterite formation processes, but the biogeochemistry of the resulting serpentine soils is still poorly understood. The aim of this study was to characterize the soil geochemical composition and microbial community of contrasting landscapes in the area, as the foundation to start exploring the biogeochemistry of metals occurring there. The soils were confirmed as Ni-rich serpentine soils but differed depending on their geographical location within the ophiolite area, showing three serpentine soil types. Weathering processes resulted in mountain soils rich in trace metals such as cobalt, manganese and nickel. The lowlands showed geochemical variations despite sharing similar landscapes: the inner ophiolite lowland soils were more like the surrounding mountain soils rather than the north lowland soils at the border of the ophiolite area, and within the same riparian basin, concentrations of trace metals were higher downstream towards the mangrove area. Microbial community composition reflected the differences in geochemical composition of soils and revealed potential geomicrobiological inputs to local metal biogeochemistry: iron redox cycling bacteria were more abundant in the mountain soils, while more manganese-oxidizing bacteria were found in the lowlands, with the highest relative abundance in the mangrove areas. The fundamental ecological associations recorded in the serpentine soils of the Santa Elena Peninsula, and its potential as a serpentinization endemism hotspot, demonstrate that is a model site to study the biogeochemistry, geomicrobiology and ecology of tropical serpentine areas. The online version contains supplementary material available at 10.1186/s12932-022-00079-5.
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影响因子：
5.4
作者：
Braun U;Crous PW;Nakashima C
通讯作者：
Nakashima C
DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
5.8
作者：
Cuong, DT;Bayen, S;Obbard, JP
通讯作者：
Obbard, JP
影响因子：
1.8
作者：
Denyer, Percy;Gazel, Esteban
通讯作者：
Gazel, Esteban
影响因子：
4.5
作者：
Butt, Charles R. M.;Cluzel, Dominique
通讯作者：
Cluzel, Dominique