Life-history correlates of plant invasiveness at regional and continental scales
Life-history correlates of plant invasiveness at regional and continental scales
复制标题
DOI：
10.1111/j.1461-0248.2005.00809.x
复制
发表时间：
2005-10-01
期刊：
影响因子：
8.8
通讯作者：
Licari, D
中科院分区：
文献类型：
--
作者：
Hamilton, MA;Murray, BR;Licari, D
我们实施了跨物种和独立对比多元回归模型，比较生活史相关的入侵成功之间的区域和大陆的空间尺度在澳大利亚东部的非本地植物。我们专注于三个生活史性状，代表在植物生活史的变化主轴：比叶面积（SLA），株高和种子质量。在控制了停留时间和与其他生活史特征的互相关性后，小种子质量在大陆和区域尺度上与入侵成功显著且独特地相关。高SLA是显着的和唯一的相关性与入侵成功的大陆规模。株高不能解释在任何空间尺度上入侵成功的独特变化。空间尺度之间的变化的意义和强度的生活史关系与入侵的成功表明，预测工具的入侵搜索不一定是徒劳的，只要预测调查的目标是在适当的空间尺度。
We implemented cross-species and independent-contrasts multiple regression models to compare life-history correlates of invasion success between regional and continental spatial scales among non-native plants of eastern Australia. We focussed on three life-history traits that represent major axes of variation in plant life history: specific leaf area (SLA), plant height and seed mass. After controlling for residence time and cross-correlation with other life-history traits, small seed mass was significantly and uniquely correlated with invasion success at continental and regional scales. High SLA was significantly and uniquely correlated with invasion success at the continental scale only. Plant height could not explain unique variation in invasion success at either spatial scale. Variation among spatial scales in the significance and strength of life-history relationships with invasion success suggests that the search for predictive tools of invasion need not be fruitless, as long as predictive investigations are targeted at appropriate spatial scales.