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- Huxman, T.E.; Snyder, K.A.; Tissue, D.; Leffler, A.J.; Ogle, K.; Pockman, W.T.; Sandquist, D.R.; Potts, D.L.; Schwinning, S.
- Oecologia 2004 v.141 no.2 pp. 254
- precipitation; duration; temporal variation; soil microorganisms; microbial activity; photosynthesis; soil respiration; rain; carbon; desert soils; canopy; vegetation structure; deserts; arid zones; semiarid zones; dry environmental conditions; water; plant growth; greenhouse gases; carbon dioxide; leaf area; gas exchange; soil water; California; Mexico; Mojave Desert; Sonoran Desert
- ... In the arid and semiarid regions of North America, discrete precipitation pulses are important triggers for biological activity. The timing and magnitude of these pulses may differentially affect the activity of plants and microbes, combining to influence the C balance of desert ecosystems. Here, we evaluate how a pulse of water influences physiological activity in plants, soils and ecosystems, an ...
- Austin, Amy T.; Yahdjian, Laura; Stark, John M.; Belnap, Jayne; Porporato, Amilcare; Norton, Urszula; Ravetta, Damian A.; Schaeffer, Sean M.
- Oecologia 2004 v.141 no.2 pp. 221
- biogeochemical cycles; soil-atmosphere interactions; soil respiration; wet-dry cycles; carbon; nitrogen; mineralization; soil texture; arid zones; semiarid zones; soil fauna; soil microorganisms; carbon nitrogen ratio
- ... The episodic nature of water availability in arid and semiarid ecosystems has significant consequences on belowground carbon and nutrient cycling. Pulsed water events directly control belowground processes through soil wet-dry cycles. Rapid soil microbial response to incident moisture availability often results in almost instantaneous C and N mineralization, followed by shifts in C/N of microbiall ...