Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile
In recently deglaciated soils, microbial organisms drive soil transformations by increasing carbon (C) and nitrogen (N) pools while depleting available phosphorous (P), thus improving plant colonization and soil development. However, the rate of soil development can vary in response to local environ...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2020-01-01
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| Series: | Arctic, Antarctic, and Alpine Research |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/15230430.2020.1820124 |
| _version_ | 1819060351050711040 |
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| author | Fernando D. Alfaro Alejandro Salazar-Burrows Camila Bañales-Seguel Juan-Luis García Marlene Manzano Pablo A. Marquet Kriss Ruz Aurora Gaxiola |
| author_facet | Fernando D. Alfaro Alejandro Salazar-Burrows Camila Bañales-Seguel Juan-Luis García Marlene Manzano Pablo A. Marquet Kriss Ruz Aurora Gaxiola |
| author_sort | Fernando D. Alfaro |
| collection | DOAJ |
| description | In recently deglaciated soils, microbial organisms drive soil transformations by increasing carbon (C) and nitrogen (N) pools while depleting available phosphorous (P), thus improving plant colonization and soil development. However, the rate of soil development can vary in response to local environmental conditions that affect microbial abundance and activity. In this contribution we use observational and experimental approaches to evaluate the interplay between soil biogeochemical features and microbial abundance and function after approximately seventy years of soil development in the forefield of the Exploradores Glacier that is located at the northernmost end of the Northern Patagonian Ice Field. Our findings suggest that after approximately seventy years of soil development, microbial abundance and soil C and N accumulation increase with soil age, soil bulk density and pH decreased, and microbial activity measured as soil chlorophyll a and nifH gene abundance increased. In turn, decomposition increased with fungal abundance, showing higher values in the late stages of soil development where the soil C:N ratio was higher and soil pH was lower. Overall, biogeochemical changes along this chronosequence followed the predicted pattern, with gradual increases in soil nutrients and microbial abundance, in addition to decomposition processes. |
| first_indexed | 2024-12-21T14:25:36Z |
| format | Article |
| id | doaj.art-e7dae16f09614a08994e90c7dade74ba |
| institution | Directory Open Access Journal |
| issn | 1523-0430 1938-4246 |
| language | English |
| last_indexed | 2024-12-21T14:25:36Z |
| publishDate | 2020-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Arctic, Antarctic, and Alpine Research |
| spelling | doaj.art-e7dae16f09614a08994e90c7dade74ba2022-12-21T19:00:40ZengTaylor & Francis GroupArctic, Antarctic, and Alpine Research1523-04301938-42462020-01-0152155356210.1080/15230430.2020.18201241820124Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, ChileFernando D. Alfaro0Alejandro Salazar-Burrows1Camila Bañales-Seguel2Juan-Luis García3Marlene Manzano4Pablo A. Marquet5Kriss Ruz6Aurora Gaxiola7Universidad MayorPontificia Universidad Católica de ChileUniversidad de ConcepciónPontificia Universidad Católica de ChileUniversidad MayorInstituto de Ecología & Biodiversidad (IEB)Universidad MayorInstituto de Ecología & Biodiversidad (IEB)In recently deglaciated soils, microbial organisms drive soil transformations by increasing carbon (C) and nitrogen (N) pools while depleting available phosphorous (P), thus improving plant colonization and soil development. However, the rate of soil development can vary in response to local environmental conditions that affect microbial abundance and activity. In this contribution we use observational and experimental approaches to evaluate the interplay between soil biogeochemical features and microbial abundance and function after approximately seventy years of soil development in the forefield of the Exploradores Glacier that is located at the northernmost end of the Northern Patagonian Ice Field. Our findings suggest that after approximately seventy years of soil development, microbial abundance and soil C and N accumulation increase with soil age, soil bulk density and pH decreased, and microbial activity measured as soil chlorophyll a and nifH gene abundance increased. In turn, decomposition increased with fungal abundance, showing higher values in the late stages of soil development where the soil C:N ratio was higher and soil pH was lower. Overall, biogeochemical changes along this chronosequence followed the predicted pattern, with gradual increases in soil nutrients and microbial abundance, in addition to decomposition processes.http://dx.doi.org/10.1080/15230430.2020.1820124archaeabacteriafungisoil developmentandean |
| spellingShingle | Fernando D. Alfaro Alejandro Salazar-Burrows Camila Bañales-Seguel Juan-Luis García Marlene Manzano Pablo A. Marquet Kriss Ruz Aurora Gaxiola Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile Arctic, Antarctic, and Alpine Research archaea bacteria fungi soil development andean |
| title | Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile |
| title_full | Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile |
| title_fullStr | Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile |
| title_full_unstemmed | Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile |
| title_short | Soil microbial abundance and activity across forefield glacier chronosequence in the Northern Patagonian Ice Field, Chile |
| title_sort | soil microbial abundance and activity across forefield glacier chronosequence in the northern patagonian ice field chile |
| topic | archaea bacteria fungi soil development andean |
| url | http://dx.doi.org/10.1080/15230430.2020.1820124 |
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