Suppressed N fixation and diazotrophs after four decades of fertilization
Abstract Background N fixation is one of the most important microbially driven ecosystem processes on Earth, allowing N to enter the soil from the atmosphere, and regulating plant productivity. A question that remains to be answered is whether such a fundamental process would still be that important...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2019-10-01
|
| Series: | Microbiome |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s40168-019-0757-8 |
| _version_ | 1819170167182065664 |
|---|---|
| author | Kunkun Fan Manuel Delgado-Baquerizo Xisheng Guo Daozhong Wang Yanying Wu Mo Zhu Wei Yu Huaiying Yao Yong-guan Zhu Haiyan Chu |
| author_facet | Kunkun Fan Manuel Delgado-Baquerizo Xisheng Guo Daozhong Wang Yanying Wu Mo Zhu Wei Yu Huaiying Yao Yong-guan Zhu Haiyan Chu |
| author_sort | Kunkun Fan |
| collection | DOAJ |
| description | Abstract Background N fixation is one of the most important microbially driven ecosystem processes on Earth, allowing N to enter the soil from the atmosphere, and regulating plant productivity. A question that remains to be answered is whether such a fundamental process would still be that important in an over-fertilized world, as the long-term effects of fertilization on N fixation and associated diazotrophic communities remain to be tested. Here, we used a 35-year fertilization experiment, and investigated the changes in N fixation rates and the diazotrophic community in response to long-term inorganic and organic fertilization. Results It was found that N fixation was drastically reduced (dropped by 50%) after almost four decades of fertilization. Our results further indicated that functionality losses were associated with reductions in the relative abundance of keystone and phylogenetically clustered N fixers such as Geobacter spp. Conclusions Our work suggests that long-term fertilization might have selected against N fixation and specific groups of N fixers. Our study provides solid evidence that N fixation and certain groups of diazotrophic taxa will be largely suppressed in a more and more fertilized world, with implications for soil biodiversity and ecosystem functions. |
| first_indexed | 2024-12-22T19:31:05Z |
| format | Article |
| id | doaj.art-17c79e4f58dc4c478580e4469866bb2b |
| institution | Directory Open Access Journal |
| issn | 2049-2618 |
| language | English |
| last_indexed | 2024-12-22T19:31:05Z |
| publishDate | 2019-10-01 |
| publisher | BMC |
| record_format | Article |
| series | Microbiome |
| spelling | doaj.art-17c79e4f58dc4c478580e4469866bb2b2022-12-21T18:15:06ZengBMCMicrobiome2049-26182019-10-017111010.1186/s40168-019-0757-8Suppressed N fixation and diazotrophs after four decades of fertilizationKunkun Fan0Manuel Delgado-Baquerizo1Xisheng Guo2Daozhong Wang3Yanying Wu4Mo Zhu5Wei Yu6Huaiying Yao7Yong-guan Zhu8Haiyan Chu9State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of SciencesCooperative Institute for Research in Environmental Sciences, University of ColoradoInstitute of Soil and Fertilizer Research, Anhui Academy of Agricultural SciencesInstitute of Soil and Fertilizer Research, Anhui Academy of Agricultural SciencesHigh School Affiliated to Nanjing Normal UniversityHigh School Affiliated to Nanjing Normal UniversityHigh School Affiliated to Nanjing Normal UniversityKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of SciencesKey Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of SciencesState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of SciencesAbstract Background N fixation is one of the most important microbially driven ecosystem processes on Earth, allowing N to enter the soil from the atmosphere, and regulating plant productivity. A question that remains to be answered is whether such a fundamental process would still be that important in an over-fertilized world, as the long-term effects of fertilization on N fixation and associated diazotrophic communities remain to be tested. Here, we used a 35-year fertilization experiment, and investigated the changes in N fixation rates and the diazotrophic community in response to long-term inorganic and organic fertilization. Results It was found that N fixation was drastically reduced (dropped by 50%) after almost four decades of fertilization. Our results further indicated that functionality losses were associated with reductions in the relative abundance of keystone and phylogenetically clustered N fixers such as Geobacter spp. Conclusions Our work suggests that long-term fertilization might have selected against N fixation and specific groups of N fixers. Our study provides solid evidence that N fixation and certain groups of diazotrophic taxa will be largely suppressed in a more and more fertilized world, with implications for soil biodiversity and ecosystem functions.http://link.springer.com/article/10.1186/s40168-019-0757-8DiazotrophsNitrogen fixation ratesEcological clustersLong-term fertilization |
| spellingShingle | Kunkun Fan Manuel Delgado-Baquerizo Xisheng Guo Daozhong Wang Yanying Wu Mo Zhu Wei Yu Huaiying Yao Yong-guan Zhu Haiyan Chu Suppressed N fixation and diazotrophs after four decades of fertilization Microbiome Diazotrophs Nitrogen fixation rates Ecological clusters Long-term fertilization |
| title | Suppressed N fixation and diazotrophs after four decades of fertilization |
| title_full | Suppressed N fixation and diazotrophs after four decades of fertilization |
| title_fullStr | Suppressed N fixation and diazotrophs after four decades of fertilization |
| title_full_unstemmed | Suppressed N fixation and diazotrophs after four decades of fertilization |
| title_short | Suppressed N fixation and diazotrophs after four decades of fertilization |
| title_sort | suppressed n fixation and diazotrophs after four decades of fertilization |
| topic | Diazotrophs Nitrogen fixation rates Ecological clusters Long-term fertilization |
| url | http://link.springer.com/article/10.1186/s40168-019-0757-8 |
| work_keys_str_mv | AT kunkunfan suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT manueldelgadobaquerizo suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT xishengguo suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT daozhongwang suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT yanyingwu suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT mozhu suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT weiyu suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT huaiyingyao suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT yongguanzhu suppressednfixationanddiazotrophsafterfourdecadesoffertilization AT haiyanchu suppressednfixationanddiazotrophsafterfourdecadesoffertilization |