Karlsson P S
Abisko Scientific Research Station, S-980 24, Abisko, Sweden.
Oecologia. 1992 Sep;91(3):346-349. doi: 10.1007/BF00317622.
Leaf longevities were determined for 16 species of evergreen shurbs (Ericaceae and Empetraceae) at different habitats at three latitudes (c. 47°, 55-58° and 68°N) in central and north Europe to determine whether any general trends exist in variation in leaf longevity within and among species. Among these species and sites, mean leaf longevity varied between 1.4 and 3.8 seasons, which is similar to the values reported for other evergreen shrubs, but shorter than for many evergreen conifers. Consistent differences in leaf longevity were found when comparing latitudes (ignoring altitude and habitat type): longevities were longer at 68°N than at the two lower latitudes. No consistent trends were found among species within altitudes.
为了确定在物种内部和物种之间叶片寿命的变化是否存在任何一般趋势，研究人员测定了北欧中部三个纬度（约47°、55 - 58°和68°N）不同栖息地的16种常绿灌木（杜鹃花科和岩高兰科）的叶片寿命。在这些物种和地点中，平均叶片寿命在1.4至3.8个季节之间变化，这与其他常绿灌木报道的值相似，但比许多常绿针叶树的寿命短。在比较纬度时（忽略海拔和栖息地类型）发现了叶片寿命的一致差异：68°N的叶片寿命比两个较低纬度的更长。在海拔范围内的物种之间未发现一致的趋势。
