Phylogenetic analysis of trait evolution and species diversity variation among angiosperm families
Phylogenetic analysis of trait evolution and species diversity variation among angiosperm families
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DOI：
10.1111/j.1558-5646.1999.tb05367.x
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发表时间：
1999-06-01
期刊：
影响因子：
3.3
通讯作者：
Chase, MW
中科院分区：
文献类型：
--
作者：
Dodd, ME;Silvertown, J;Chase, MW
被子植物科之间在物种丰富度（S）上存在很大差异。以往的研究认为，传粉方式（生物/非生物）和生长方式（草本/木本）对物种形成率的影响是造成这种差异的重要因素，但这些研究都忽略了科间的系统发育关系，难以解释。我们使用被子植物家族的分子遗传学来重新分析S和家族水平性状之间的相关性，并使用性状进化的重建来解释结果。我们证实，授粉模式和生长形式与S相关，并表明大多数授粉模式的变化涉及从生物到非生物授粉的变化与相关的物种形成率下降。大多数的生长形式的变化涉及从木质化的草食性与相关的物种形成率上升的演变。我们检验了Ricklefs和Renner（1994）的假设，即“进化的灵活性”而不是其他性状的变化引发了某些家族物种形成率的增加，但几乎没有发现支持这一假设的证据。
Angiosperm families differ greatly from one another in species richness (S). Previous studies have attributed significant components of this variation to the influence of pollination mode (biotic/abiotic) and growth form (herbaceous/woody) on speciation rate, but these results suffer difficulties of interpretation because all the studies ignored the phylogenetic relationships among families. We use a molecular phylogeny of the angiosperm families to reanalyse correlations between S and family-level traits and use reconstructions of trait evolution to interpret the results. We confirm that pollination mode and growth form are correlated with S and show that the majority of changes in pollination mode involved a change from biotic to abiotic pollination with an associated fall in speciation rate. The majority of growth form changes involved the evolution of herbaceousness from woodiness with a correlated rise in speciation rate. We test the hypothesis of Ricklefs and Renner (1994) that "evolutionary flexibility" rather than other trait changes triggered increased speciation rates in some families, but find little support for the hypothesis.