Long‐term Changes in Fruit Phenology in a West African Lowland Tropical Rain Forest are Not Explained by Rainfall
Long‐term Changes in Fruit Phenology in a West African Lowland Tropical Rain Forest are Not Explained by Rainfall
复制标题
西非低地热带雨林果实物候的长期变化不能用降雨来解释
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
C. Boesch
中科院分区：
文献类型：
--
作者：
Leo Polansky;C. Boesch
降雨量的减少被认为会对热带雨林产生负面影响，西非目前正经历多年降雨量的下降。在这里，我们提出了一个长期的数据集上的植物结果状态从个人的44种热带雨林的塔霍河国家公园，科特迪瓦的分析。这项研究包括1401个人的记录，收集在每月的间隔超过12年，984在整个研究期间存活。本研究的目的是：（1）量化物种和森林规模水果存在的年际趋势;（2）测试降雨量在解释年际水果存在变化方面的重要性。大多数物种的预期果实个体比例呈长期上升趋势，而没有发现显著的下降趋势，推动了群落水平的显著上升趋势。上升趋势物种的生产高峰月份与旱季或雨季无关。显着的降雨量与显示水果的个人的总比例的相关性一般是负的，只有五个物种表现出显着的正相关性。总之，这些结果表明，所观察到的水果丰度的年际趋势和变化目前与降雨量无关。我们讨论几个简约和复杂的替代解释。
Decreases in rainfall have been proposed to have a negative impact on tropical rain forests, and West Africa is currently experiencing a decline in rainfall at the multi‐decadal scale. Here, we present analyses of a long‐term dataset on the plant fruiting status from individuals of 44 species of the tropical rain forest of Taï National Park, Côte d'Ivoire. This study includes records of 1401 individuals collected at monthly intervals for over 12 yr, 984 of which survived throughout the entire study period. The aims of this study were to: (1) quantitate inter‐annual trends in species and forest scale fruit presence; and (2) test the importance of rainfall in explaining inter‐annual fruit presence variability. Long‐term upward trends in the expected proportion of individuals with fruits were found for the majority of species, while no significant downward trends were detected, driving a significant upward trend at the community level. Peak production months of the upward trending species were not associated with the dry or wet season. Significant rainfall correlations with the total proportion of individuals showing fruit were generally negative, with only five species showing significant positive correlations. Taken together, these results suggest that the observed inter‐annual trends and variability of fruit abundance are currently not associated with rainfall. We discuss several parsimonious and complex alternative explanations.
DOI：
--
发表时间：
2015-10
期刊：
--
影响因子：
--
作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
通讯作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker