Adaptation of soil microbial growth to temperature: Using a tropical elevation gradient to predict future changes
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Nottingham, Andrew T.; Bååth, Erland; Reischke, Stephanie; Salinas, Norma; Meir, Patrick
Description
Terrestrial biogeochemical feedbacks to the climate are strongly modulated by the temperature response of soil microorganisms. Tropical forests, in particular, exert a major influence on global climate because they are the most productive terrestrial ecosystem. We used an elevation gradient across tropical forest in the Andes (a gradient of 20°C mean annual temperature, MAT), to test whether soil bacterial and fungal community growth responses are adapted to long‐term temperature differences....[Show more]
dc.contributor.author | Nottingham, Andrew T. | |
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dc.contributor.author | Bååth, Erland | |
dc.contributor.author | Reischke, Stephanie | |
dc.contributor.author | Salinas, Norma | |
dc.contributor.author | Meir, Patrick | |
dc.date.accessioned | 2019-11-14T00:31:14Z | |
dc.date.available | 2019-11-14T00:31:14Z | |
dc.identifier.issn | 1354-1013 | |
dc.identifier.uri | http://hdl.handle.net/1885/186104 | |
dc.description.abstract | Terrestrial biogeochemical feedbacks to the climate are strongly modulated by the temperature response of soil microorganisms. Tropical forests, in particular, exert a major influence on global climate because they are the most productive terrestrial ecosystem. We used an elevation gradient across tropical forest in the Andes (a gradient of 20°C mean annual temperature, MAT), to test whether soil bacterial and fungal community growth responses are adapted to long‐term temperature differences. We evaluated the temperature dependency of soil bacterial and fungal growth using the leucine‐ and acetate‐incorporation methods, respectively, and determined indices for the temperature response of growth: Q10 (temperature sensitivity over a given 10oC range) and Tmin (the minimum temperature for growth). For both bacterial and fungal communities, increased MAT (decreased elevation) resulted in increases in Q10 and Tmin of growth. Across a MAT range from 6°C to 26°C, the Q10 and Tmin varied for bacterial growth (Q10–20 = 2.4 to 3.5; Tmin = −8°C to −1.5°C) and fungal growth (Q10–20 = 2.6 to 3.6; Tmin = −6°C to −1°C). Thus, bacteria and fungi did not differ significantly in their growth temperature responses with changes in MAT. Our findings indicate that across natural temperature gradients, each increase in MAT by 1°C results in increases in Tmin of microbial growth by approximately 0.3°C and Q10–20 by 0.05, consistent with long‐term temperature adaptation of soil microbial communities. A 2°C warming would increase microbial activity across a MAT gradient of 6°C to 26°C by 28% to 15%, respectively, and temperature adaptation of microbial communities would further increase activity by 1.2% to 0.3%. The impact of warming on microbial activity, and the related impact on soil carbon cycling, is thus greater in regions with lower MAT. These results can be used to predict future changes in the temperature response of microbial activity over different levels of warming and over large temperature ranges, extending to tropical regions. | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | Blackwell Publishing Ltd | |
dc.rights | © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.source | Global Change Biology | |
dc.title | Adaptation of soil microbial growth to temperature: Using a tropical elevation gradient to predict future changes | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 25 | |
dc.date.issued | 2019 | |
local.identifier.absfor | 060705 - Plant Physiology | |
local.identifier.ariespublication | u3102795xPUB917 | |
local.publisher.url | https://www.wiley.com/en-gb | |
local.type.status | Published Version | |
local.contributor.affiliation | Nottingham, Andrew T., University of Edinburgh | |
local.contributor.affiliation | Bååth, Erland, Lund University | |
local.contributor.affiliation | Reischke, Stephanie, Lund University | |
local.contributor.affiliation | Salinas, Norma , Universidad La Católica | |
local.contributor.affiliation | Meir, Patrick, College of Science, ANU | |
dc.relation | http://purl.org/au-research/grants/arc/DP170104091 | |
local.bibliographicCitation.issue | 3 | |
local.bibliographicCitation.startpage | 827 | |
local.bibliographicCitation.lastpage | 838 | |
local.identifier.doi | 10.1111/gcb.14502 | |
local.identifier.absseo | 970106 - Expanding Knowledge in the Biological Sciences | |
dc.date.updated | 2019-05-05T09:19:07Z | |
local.identifier.scopusID | 2-s2.0-85059587397 | |
dcterms.accessRights | Open Access | |
dc.provenance | This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited | |
dc.rights.license | Creative Commons Attribution License | |
Collections | ANU Research Publications |
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