ARE LIANAS INCREASING IN IMPORTANCE IN TROPICAL FORESTS? A 17‐YEAR RECORD FROM PANAMA
ARE LIANAS INCREASING IN IMPORTANCE IN TROPICAL FORESTS? A 17‐YEAR RECORD FROM PANAMA
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DOI：
10.1890/02-0757
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发表时间：
2004-02
期刊：
影响因子：
4.8
通讯作者：
S. Joseph Wright;O. Calderón;Andrés Hernández;S. Paton
中科院分区：
文献类型：
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作者：
S. Joseph Wright;O. Calderón;Andrés Hernández;S. Paton
大型藤本植物（木本藤本植物）的相对重要性增加了100%的干计数在20世纪80年代和90年代广泛分散的新热带森林。我们使用三种独立类型的数据来评估假设，即藤本植物的重要性增加，在巴罗科罗拉多岛，巴拿马的老增长森林。1986年至2002年期间，藤本植物叶凋落物产量和全林由藤本植物组成的叶凋落物比例增加。与此相反，藤本植物种子生产和藤本植物幼苗密度随着时间的推移变化更大，在厄尔尼诺年期间和之后的水平特别高。将需要更长的时间序列来检测高度动态的种子和幼苗群落的生命形式组成的变化。然而，巴罗科罗拉多岛的叶生产数据是一致的假设，即藤本植物在新热带森林的重要性增加。
The relative importance of large lianas (woody vines) increased by 100% for stem enumerations conducted during the 1980s and 1990s in widely scattered Neotropical forests. We use three independent types of data to evaluate the hypothesis that lianas have increased in importance in old growth forests on Barro Colorado Island, Panama. Liana leaf litter production and the proportion of forest-wide leaf litter composed of lianas increased between 1986 and 2002. In contrast, liana seed production and liana seedling densities were much more variable through time with particularly high levels during and immediately after El Nino years. Longer time series will be required to detect shifts in life-form composition for highly dynamic seed and seedling communities. The Barro Colorado Island leaf production data are, however, consistent with the hypothesis that lianas are increasing in importance in Neotropical forests.