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Publication Type J
Authors Gul, B. and D. J. Weber
Title Seed bank dynamics in a Great Basin salt playa
Source Journal of Arid Environments
Author Keywords germination; marsh; temperature; communities; salinity
Abstract Salt playa are common in the Great Basin area with halophytes as the dominant flora. The relationship between the seed bank flora and existing vegetation was studied. The seed bank flora showed a high degree of similarity with that of perennial and annual halophytic vegetation. Both above and below ground components of the community are dominated by halophyte species like Allenrolfea occidentalis, Holosteum umbellatum, Salicornia rubra and Salicornia utahensis. Seasonal variation in the seed bank was also studied for the 1995-1996 and 1996-1997 growing seasons. The seeds of A. occidentalis persist in the soil of the upper zone in large densities. Salicornia utahensis was much higher in the upper zone throughout the study period. Most species demonstrated the persistent nature of the seed banks with their numbers increasing after seed dispersal and decreasing in subsequent months. The variation illustrates the transient nature of the seed bank. We concluded that A. occidentalis is more dependent on a large seed bank for maintaining its population than the two annual halophytes. The significance of the seed bank and their variation due to environmental conditions for perennial and annual species of the Great Basin salt playa community is discussed. (C) 2001 Academic Press.
Author Address Brigham Young Univ, Dept Bot & Range Sci, Provo, UT 84602 USA Brigham Young Univ, Dept Bot & Range Sci, Provo, UT 84602 USA Weber DJ Brigham Young Univ, Dept Bot & Range Sci, Provo, UT 84602 USA
29-Character Source Abbreviation J. Arid. Environ.
Publication Date Dec
Year Published 2001
Volume 49
Issue 4
Beginning Page 785-794
Unique Article Identifier ISI:000173469500009
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