|
|||||
|
|
The temperature responses of soil respiration in deserts: a seven desert synthesis |
|
| Authors: | Jessica M Cable Kiona Ogle Richard W Lucas Travis E Huxman Michael E Loik Stanley D Smith David T Tissue Brent E Ewers Elise Pendall Jeffrey M Welker Therese N Charlet Meagan Cleary Alden Griffith Robert S Nowak Matthew Rogers Heidi Steltzer Patrick F Sullivan Natasja C van Gestel |
| Institution: | 1. International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, 99775, USA 11. Environment and Natural Resources Institute, University of Alaska Anchorage, Anchorage, AK, 99508, USA 2. Department of Botany and Program in Ecology, University of Wyoming, Laramie, WY, 82071, USA 3. Department of Statistics, University of Wyoming, Laramie, WY, 82071, USA 4. Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Ume?, Sweden 5. Ecology and Evolutionary Biology Department, University of Arizona, Tucson, AZ, 85721, USA 6. B2 Earthscience, University of Arizona, Tucson, AZ, 85721, USA 7. Department of Environmental Studies, University of California, Santa Cruz, CA, 95064, USA 8. School of Life Sciences, University of Nevada, Las Vegas, NV, 89154, USA 10. Center for Plants and the Environment, University of Western Sydney, Richmond, NSW, 2753, Australia 9. Department of Biology, Texas Tech University, Lubbock, TX, 79409, USA 16. Biological Sciences Department, University of Alaska Anchorage, Anchorage, AK, 99501, USA 12. Wellesley College Botanic Gardens, Wellesley, MA, 02482, USA 13. Department of Natural Resources and Environmental Science, University of Nevada, Reno, NV, 89557, USA 14. Natural Resource Ecology Laboratory, Colorado State University, Ft. Collins, CO, 80523, USA 15. Department of Biology, Fort Lewis College, Durango, CO, 81301, USA |
| Abstract: | The temperature response of soil respiration in deserts is not well quantified. We evaluated the response of respiration to temperatures spanning 67°C from seven deserts across North America and Greenland. Deserts have similar respiration rates in dry soil at 20°C, and as expected, respiration rates are greater under wet conditions, rivaling rates observed for more mesic systems. However, deserts differ in their respiration rates under wet soil at 20°C and in the strength of the effect of current and antecedent soil moisture on the sensitivity and magnitude of respiration. Respiration increases with temperature below 30°C but declines for temperatures exceeding 35°C. Hot deserts have lower temperature sensitivity than cold deserts, and insensitive or negative temperature sensitivities were predicted under certain moisture conditions that differed among deserts. These results have implications for large-scale modeling efforts because we highlight the unique behavior of desert soil respiration relative to other systems. These behaviors include variable temperature responses and the importance of antecedent moisture conditions for soil respiration. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |