Fowler Norma L
Department of Botany, University of Texas at Austin, 78712, Austin, Texas, USA.
Oecologia. 1984 Jun;62(3):424-428. doi: 10.1007/BF00384278.
Individuals of two perennial bunch grasses, Bouteloua rigidiseta and Aristida longiseta, were transplanted into otherwise undisturbed natural short-grass vegetation in which these species are dominants. Significant differences in survivorship and growth rate were found among quadrats for both species. The relative favorability of quadrats for Bouteloua, but not for Aristida, changed during the course of the two year study. For neither species was a consistent relationship between pre-existing density and transplant performance found. However, one patch type was identified in which Bouteloua transplants grow well, although this species is not naturally present there, apparently because it cannot establish. Microsite differences, created by different soil in transplanted peat pots, were also found to be important. Bouteloua had a higher survivorship the first year, Aristida the second, which suggests that Aristida is the more tolerant of drier years.
将两种多年生丛生禾本科植物硬直布氏草（Bouteloua rigidiseta）和长芒三芒草（Aristida longiseta）的植株移植到原本未受干扰、以这些物种为主导的天然矮草植被中。发现这两个物种在不同样方中的存活率和生长速率存在显著差异。在为期两年的研究过程中，样方对硬直布氏草的相对适宜性发生了变化，但对长芒三芒草而言并非如此。对于这两个物种，均未发现原有密度与移植表现之间存在一致的关系。然而，确定了一种斑块类型，尽管硬直布氏草并非自然生长在那里，但移植的该物种却生长良好，显然是因为它无法自然定居。还发现，移植的泥炭盆中不同土壤造成的微生境差异也很重要。硬直布氏草第一年的存活率较高，长芒三芒草第二年的存活率较高，这表明长芒三芒草更能耐受较干旱的年份。
