On the role of soil water retention characteristic on aerobic microbial respiration
<p>Soil water status is one of the most important environmental factors that control microbial activity and rate of soil organic matter (SOM) decomposition. Its effect can be partitioned into effect of water energy status (water potential) on cellular activity, effect of water volume on cellul...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-03-01
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| Series: | Biogeosciences |
| Online Access: | https://www.biogeosciences.net/16/1187/2019/bg-16-1187-2019.pdf |
| _version_ | 1818422453751250944 |
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| author | T. A. Ghezzehei B. Sulman C. L. Arnold N. A. Bogie A. A. Berhe |
| author_facet | T. A. Ghezzehei B. Sulman C. L. Arnold N. A. Bogie A. A. Berhe |
| author_sort | T. A. Ghezzehei |
| collection | DOAJ |
| description | <p>Soil water status is one of the
most important environmental factors that control microbial activity and rate of soil
organic matter (SOM) decomposition. Its effect can be partitioned into effect of water
energy status (water potential) on cellular activity, effect of water volume on cellular
motility, and aqueous diffusion of substrate and nutrients, as well as the effect of air
content and gas-diffusion pathways on concentration of dissolved oxygen. However,
moisture functions widely used in SOM decomposition models are often based on empirical
functions rather than robust physical foundations that account for these disparate
impacts of soil water. The contributions of soil water content and water potential vary
from soil to soil according to the soil water characteristic (SWC), which in turn is
strongly dependent on soil texture and structure. The overall goal of this study is to
introduce a physically based modeling framework of aerobic microbial respiration that
incorporates the role of SWC under arbitrary soil moisture status. The model was tested
by comparing it with published datasets of SOM decomposition under laboratory conditions.</p> |
| first_indexed | 2024-12-14T13:26:30Z |
| format | Article |
| id | doaj.art-533613dc668d4870b584168d88b35ce2 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-12-14T13:26:30Z |
| publishDate | 2019-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-533613dc668d4870b584168d88b35ce22022-12-21T22:59:48ZengCopernicus PublicationsBiogeosciences1726-41701726-41892019-03-01161187120910.5194/bg-16-1187-2019On the role of soil water retention characteristic on aerobic microbial respirationT. A. Ghezzehei0B. Sulman1C. L. Arnold2N. A. Bogie3A. A. Berhe4School of Natural Sciences, University of California, Merced, CA 95340, USAEnvironmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USASchool of Natural Sciences, University of California, Merced, CA 95340, USASchool of Natural Sciences, University of California, Merced, CA 95340, USASchool of Natural Sciences, University of California, Merced, CA 95340, USA<p>Soil water status is one of the most important environmental factors that control microbial activity and rate of soil organic matter (SOM) decomposition. Its effect can be partitioned into effect of water energy status (water potential) on cellular activity, effect of water volume on cellular motility, and aqueous diffusion of substrate and nutrients, as well as the effect of air content and gas-diffusion pathways on concentration of dissolved oxygen. However, moisture functions widely used in SOM decomposition models are often based on empirical functions rather than robust physical foundations that account for these disparate impacts of soil water. The contributions of soil water content and water potential vary from soil to soil according to the soil water characteristic (SWC), which in turn is strongly dependent on soil texture and structure. The overall goal of this study is to introduce a physically based modeling framework of aerobic microbial respiration that incorporates the role of SWC under arbitrary soil moisture status. The model was tested by comparing it with published datasets of SOM decomposition under laboratory conditions.</p>https://www.biogeosciences.net/16/1187/2019/bg-16-1187-2019.pdf |
| spellingShingle | T. A. Ghezzehei B. Sulman C. L. Arnold N. A. Bogie A. A. Berhe On the role of soil water retention characteristic on aerobic microbial respiration Biogeosciences |
| title | On the role of soil water retention characteristic on aerobic microbial respiration |
| title_full | On the role of soil water retention characteristic on aerobic microbial respiration |
| title_fullStr | On the role of soil water retention characteristic on aerobic microbial respiration |
| title_full_unstemmed | On the role of soil water retention characteristic on aerobic microbial respiration |
| title_short | On the role of soil water retention characteristic on aerobic microbial respiration |
| title_sort | on the role of soil water retention characteristic on aerobic microbial respiration |
| url | https://www.biogeosciences.net/16/1187/2019/bg-16-1187-2019.pdf |
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