Filters: Contacts: Richardson, Leah (X) > Types: Citation (X) > partyWithName: Davis, Kim (X) > Extensions: Citation (X)

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Deuterium enriched irrigation indicates different forms of rain use in shrub/grass species of the Colorado Plateau We contrasted the seasonal use of simulated large rain events (24 mm) by three native species of the arid Colorado Plateau: the perennial grass Hilaria jamesii and two shrubs Artemesia filifolia and Coleogyne ramosissima. Deuterium-enriched water was used to distinguish shallow "pulse" water from water in deeper soil layers that were unaffected by the water input. We also measured the leaf gas exchange rates of watered and unwatered control plants for 5 days after the rain event. H. jamesii had twice the pulse water proportion in its xylem than the two shrubs in spring (approx. 70% vs 35%). In summer, the pulse water proportions of all species were around 70%. The increase in the relative pulse water uptake of the... Categories: Publication; Types: Citation, Journal Citation; Tags: Arid ecosystems, Oecologia, Plant functional types, Precipitation pulse use, Springer Berlin / Heidelberg, All tags... Stable isotope label, Water partitioning, Fewer tags