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Plant Disseminules in Wind-Blown Debris from a Glacier in Colorado
Erik K. Bonde
Arctic and Alpine Research
Vol. 1, No. 2 (Spring, 1969), pp. 135-139
Published by: INSTAAR, University of Colorado
Stable URL: http://www.jstor.org/stable/1550020
Page Count: 5
You can always find the topics here!Topics: Species, Alpine glaciers, Plants, Achenes, Plant adaptation, Aeolian transport, Alpine plants, Germination, Glacial transport, Ice
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Thirty-five species of seed plants were isolated by germination from wind-blown debris collected on the surface of St. Mary's Glacier at about 3,350 m. In addition, viable parts of Polytrichum piliferum, Selaginella densa, and four lichens were identified. Among the seed plants, bulblets of Bistorta vivipara (Polygonum viviparum) were by far the most numerous, followed by seeds of Minuartia obtusiloba (Arenaria obtusiloba) and Saxifraga rhomboidea. Disseminule transport in the direction of the strong winds from the west appears to be significant for many alpine species despite general lack of special adaptations. Such transport would appear to overcome some geographical isolating factors but results in considerable loss of disseminules by some species.