Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera
Soil bacteria play a fundamental role in pedogenesis. However, knowledge about both the impact of climate and slope aspects on microbial communities and the consequences of these items in pedogenesis is lacking. Therefore, soil-bacterial communities from four sites and two different aspects along th...
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MDPI AG
2022-04-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/10/5/847 |
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| author | Victoria Rodriguez Lisa-Marie Moskwa Rómulo Oses Peter Kühn Nicolás Riveras-Muñoz Oscar Seguel Thomas Scholten Dirk Wagner |
| author_facet | Victoria Rodriguez Lisa-Marie Moskwa Rómulo Oses Peter Kühn Nicolás Riveras-Muñoz Oscar Seguel Thomas Scholten Dirk Wagner |
| author_sort | Victoria Rodriguez |
| collection | DOAJ |
| description | Soil bacteria play a fundamental role in pedogenesis. However, knowledge about both the impact of climate and slope aspects on microbial communities and the consequences of these items in pedogenesis is lacking. Therefore, soil-bacterial communities from four sites and two different aspects along the climate gradient of the Chilean Coastal Cordillera were investigated. Using a combination of microbiological and physicochemical methods, soils that developed in arid, semi-arid, mediterranean, and humid climates were analyzed. <i>Proteobacteria</i>, <i>Acidobacteria</i>, <i>Chloroflexi</i>, <i>Verrucomicrobia</i>, and <i>Planctomycetes</i> were found to increase in abundance from arid to humid climates, while <i>Actinobacteria</i> and <i>Gemmatimonadetes</i> decreased along the transect. Bacterial-community structure varied with climate and aspect and was influenced by pH, bulk density, plant-available phosphorus, clay, and total organic-matter content. Higher bacterial specialization was found in arid and humid climates and on the south-facing slope and was likely promoted by stable microclimatic conditions. The presence of specialists was associated with ecosystem-functional traits, which shifted from pioneers that accumulated organic matter in arid climates to organic decomposers in humid climates. These findings provide new perspectives on how climate and slope aspects influence the composition and functional capabilities of bacteria, with most of these capabilities being involved in pedogenetic processes. |
| first_indexed | 2024-03-10T03:22:45Z |
| format | Article |
| id | doaj.art-1524f4b127174e04a414389683ae1b0b |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-10T03:22:45Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-1524f4b127174e04a414389683ae1b0b2023-11-23T12:13:50ZengMDPI AGMicroorganisms2076-26072022-04-0110584710.3390/microorganisms10050847Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal CordilleraVictoria Rodriguez0Lisa-Marie Moskwa1Rómulo Oses2Peter Kühn3Nicolás Riveras-Muñoz4Oscar Seguel5Thomas Scholten6Dirk Wagner7GFZ German Research Centre for Geosciences, Section Geomicrobiology, 14473 Potsdam, GermanyGFZ German Research Centre for Geosciences, Section Geomicrobiology, 14473 Potsdam, GermanyCentro Regional de Investigación y Desarrollo Sustentable de Atacama, Universidad de Atacama (CRIDESAT UDA), Copayapu 484, Copiapó 1530000, ChileDepartment of Geosciences, Soil Science and Geomorphology, University of Tübingen, 72070 Tübingen, GermanyDepartment of Geosciences, Soil Science and Geomorphology, University of Tübingen, 72070 Tübingen, GermanyFacultad de Ciencias Agronómicas, Universidad de Chile, Av. Santa Rosa #11315, La Pintana, Santiago 8820808, ChileDepartment of Geosciences, Soil Science and Geomorphology, University of Tübingen, 72070 Tübingen, GermanyGFZ German Research Centre for Geosciences, Section Geomicrobiology, 14473 Potsdam, GermanySoil bacteria play a fundamental role in pedogenesis. However, knowledge about both the impact of climate and slope aspects on microbial communities and the consequences of these items in pedogenesis is lacking. Therefore, soil-bacterial communities from four sites and two different aspects along the climate gradient of the Chilean Coastal Cordillera were investigated. Using a combination of microbiological and physicochemical methods, soils that developed in arid, semi-arid, mediterranean, and humid climates were analyzed. <i>Proteobacteria</i>, <i>Acidobacteria</i>, <i>Chloroflexi</i>, <i>Verrucomicrobia</i>, and <i>Planctomycetes</i> were found to increase in abundance from arid to humid climates, while <i>Actinobacteria</i> and <i>Gemmatimonadetes</i> decreased along the transect. Bacterial-community structure varied with climate and aspect and was influenced by pH, bulk density, plant-available phosphorus, clay, and total organic-matter content. Higher bacterial specialization was found in arid and humid climates and on the south-facing slope and was likely promoted by stable microclimatic conditions. The presence of specialists was associated with ecosystem-functional traits, which shifted from pioneers that accumulated organic matter in arid climates to organic decomposers in humid climates. These findings provide new perspectives on how climate and slope aspects influence the composition and functional capabilities of bacteria, with most of these capabilities being involved in pedogenetic processes.https://www.mdpi.com/2076-2607/10/5/847bacterial-community structurebacterial diversityclimate gradientslope aspectChilean Coastal Cordillerasoil formation |
| spellingShingle | Victoria Rodriguez Lisa-Marie Moskwa Rómulo Oses Peter Kühn Nicolás Riveras-Muñoz Oscar Seguel Thomas Scholten Dirk Wagner Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera Microorganisms bacterial-community structure bacterial diversity climate gradient slope aspect Chilean Coastal Cordillera soil formation |
| title | Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera |
| title_full | Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera |
| title_fullStr | Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera |
| title_full_unstemmed | Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera |
| title_short | Impact of Climate and Slope Aspects on the Composition of Soil Bacterial Communities Involved in Pedogenetic Processes along the Chilean Coastal Cordillera |
| title_sort | impact of climate and slope aspects on the composition of soil bacterial communities involved in pedogenetic processes along the chilean coastal cordillera |
| topic | bacterial-community structure bacterial diversity climate gradient slope aspect Chilean Coastal Cordillera soil formation |
| url | https://www.mdpi.com/2076-2607/10/5/847 |
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