Malanson George P, O'Leary John F
Department of Geography, University of California, 90024, Los Angeles, CA, USA.
Oecologia. 1982 Jun;53(3):355-358. doi: 10.1007/BF00389013.
Regeneration methods for coastal sage srub vegetation after fire were studied in the coastal Santa Monica Mountains of southern California. Six sites were sampled two years after a large fire of fall, 1978. The intensity of fire varied. Foliar cover and flowering incidence were recorded for individuals regenerating by resprouting or from seed. Resprouting plants contributed most to post-fire recovery, comprising 95% of the relative foliar shrub cover; 84% of resprout and 47% of seedling cover had flowered. An ANOVA of reproductive mode and fire intensity indicates that resprout total cover and individual size are significantly greater than those of seedlings, regardless of fire intensity. Among sites the average foliar cover of resprouts exceeded that of seedlings by factors ranging from 9 to 63. All coastal sage species examined resprout, although the potential vigor of resprouting appears to vary widely within genera (e.g. Encelia, Eriogonum, and Salvia) and even within species. In the second growing season following fire seedling density increased due to seeds shed by resprouted shrubs. Most of the cover on these stands of coastal sage scrub is destined to be either crown-sprouted individuals or their progeny.
在南加利福尼亚沿海的圣莫尼卡山脉，对火灾后海岸鼠尾草灌木丛植被的再生方法进行了研究。1978年秋季一场大火过后两年，对六个地点进行了采样。火灾强度各不相同。记录了通过萌蘖或种子再生的个体的叶覆盖度和开花发生率。萌蘖植物对火灾后的恢复贡献最大，占相对叶灌木覆盖度的95%；84%的萌蘖植物和47%的幼苗覆盖度已开花。对繁殖方式和火灾强度进行的方差分析表明，无论火灾强度如何，萌蘖植物的总覆盖度和个体大小均显著大于幼苗。在不同地点之间，萌蘖植物的平均叶覆盖度超过幼苗的倍数在9到63之间。所有被研究的海岸鼠尾草物种都会萌蘖，尽管萌蘖植物的潜在活力在属内（如叶仙人掌属、荞麦属和鼠尾草属）甚至在种内似乎差异很大。在火灾后的第二个生长季节，由于萌蘖灌木散落的种子，幼苗密度增加。这些海岸鼠尾草灌木丛林分中的大部分覆盖物将是顶芽萌蘖个体或它们的后代。
