Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions
Soil bacteria play a critical role in the functioning of ecosystems but are challenging to investigate. We developed state-factor models with machine learning to understand better and to predict the abundance of 10 dominant phyla and bacterial diversities in Australian soils, the latter expressed by...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
Pergamon
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/73805 |
| _version_ | 1848763102865129472 |
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| author | Yang, Y. Viscarra Rossel, Raphael Li, S. Bissett, A. Lee, J. Shi, Z. Behrens, T. Court, L. |
| author_facet | Yang, Y. Viscarra Rossel, Raphael Li, S. Bissett, A. Lee, J. Shi, Z. Behrens, T. Court, L. |
| author_sort | Yang, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Soil bacteria play a critical role in the functioning of ecosystems but are challenging to investigate. We developed state-factor models with machine learning to understand better and to predict the abundance of 10 dominant phyla and bacterial diversities in Australian soils, the latter expressed by the Chao and Shannon indices. In the models, we used proxies for the edaphic, climatic, biotic and topographic factors, which included soil properties, environmental variables, and the absorbance at visible–near infrared (vis–NIR) wavelengths. From a cross-validation with all observations (n = 681), we found that our models explained 43–73% of the variance in bacterial phyla abundance and diversity. The vis–NIR spectra, which represent the organic and mineral composition of soil, were prominent drivers of abundance and diversity in the models, as were changes in the soil-water balance, potential evapotranspiration, and soil nutrients. From independent validations, we found that spectro-transfer functions could predict well the phyla Acidobacteria and Actinobacteria (R2 > 0.7) as well as other dominant phyla and the Chao and Shannon diversities (R2 > 0.5). Predictions of the phyla Firmicutes were the poorest (R2 = 0.42). The vis–NIR spectra markedly improved the explanatory power and predictability of the models. |
| first_indexed | 2025-11-14T10:58:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-73805 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:58:08Z |
| publishDate | 2019 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-738052019-08-14T06:10:30Z Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions Yang, Y. Viscarra Rossel, Raphael Li, S. Bissett, A. Lee, J. Shi, Z. Behrens, T. Court, L. Soil bacteria play a critical role in the functioning of ecosystems but are challenging to investigate. We developed state-factor models with machine learning to understand better and to predict the abundance of 10 dominant phyla and bacterial diversities in Australian soils, the latter expressed by the Chao and Shannon indices. In the models, we used proxies for the edaphic, climatic, biotic and topographic factors, which included soil properties, environmental variables, and the absorbance at visible–near infrared (vis–NIR) wavelengths. From a cross-validation with all observations (n = 681), we found that our models explained 43–73% of the variance in bacterial phyla abundance and diversity. The vis–NIR spectra, which represent the organic and mineral composition of soil, were prominent drivers of abundance and diversity in the models, as were changes in the soil-water balance, potential evapotranspiration, and soil nutrients. From independent validations, we found that spectro-transfer functions could predict well the phyla Acidobacteria and Actinobacteria (R2 > 0.7) as well as other dominant phyla and the Chao and Shannon diversities (R2 > 0.5). Predictions of the phyla Firmicutes were the poorest (R2 = 0.42). The vis–NIR spectra markedly improved the explanatory power and predictability of the models. 2019 Journal Article http://hdl.handle.net/20.500.11937/73805 10.1016/j.soilbio.2018.11.005 Pergamon restricted |
| spellingShingle | Yang, Y. Viscarra Rossel, Raphael Li, S. Bissett, A. Lee, J. Shi, Z. Behrens, T. Court, L. Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title | Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title_full | Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title_fullStr | Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title_full_unstemmed | Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title_short | Soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| title_sort | soil bacterial abundance and diversity better explained and predicted with spectro-transfer functions |
| url | http://hdl.handle.net/20.500.11937/73805 |