caa a22 4500 469097361 CHVBK 20180323133035.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF00317233 doi (NATIONALLICENCE)springer-10.1007/BF00317233 Effectiveness of phosphate acquisition by juvenile cold-desert perennials from different patterns of fertile-soil microsites [Elektronische Daten] [O. Van Auken, J. Manwaring, M. Caldwell] Summary: 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 from the nearest microsites by the end of the experiment. Phosphate uptake was four to five times higher for Artemisia than for Agropyron on a shoot mass basis and seven to eight times greater than for Pseudoroegneria, which reflects species relative growth rates. Differences in shoot dry mass were significant among species, but little evidence was found for interspecific competition. Root density, root dry mass and P uptake in the upper part of the soil mixture was higher for Artemisia than the other species. Phosphate acquisition seems to be influenced by the distance of microsites and their density and the ability of plants to encounter and proliferate absorbing organs in the microsites. Springer-Verlag, 1992 Phosphate acquisition nationallicence Microsites nationallicence Colddesert nationallicence Perennials nationallicence Van Auken O. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut Manwaring J. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut Caldwell M. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut Oecologia Springer-Verlag 91/1(1992-08-01), 1-6 0029-8549 91:1<1 1992 91 442 https://doi.org/10.1007/BF00317233 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317233 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Van Auken O. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut NATIONALLICENCE 700 1- Manwaring J. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut NATIONALLICENCE 700 1- Caldwell M. Range Science Department and the Ecology Center, Utah State University, 84322-5230, Logan, UT, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/1(1992-08-01), 1-6 0029-8549 91:1<1 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer