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Phosphate uptake was measured for Artemisia tridentata, Agropyron desertorum and Pseudoroegneria spicata, three common perennial North American Great Basin species. Four patterns of nutrient-rich microsites were used in the experiments (different distances, densities and nutrient concentrations) All species were more efficient at taking up P from microsites nearest the plants than from more distant microsites. Artemisia and Agropyron acquired P more rapidly from the distant microsites when there was a larger number of microsites and, therefore, a greater probability of encounter. Uptake from the nearest microsites did not increase after 26 days, while uptake from distant microsites increased and was equal to uptake...

    map background search result map search result map Effectiveness of phosphate acquisition by juvenile cold-desert perennials from different patterns of fertile-soil microsites