High dispersal ability inhibits speciation in a continental radiation of passerine birds
High dispersal ability inhibits speciation in a continental radiation of passerine birds
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DOI：
10.1098/rspb.2011.1922
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发表时间：
2012-04-22
影响因子：
4.7
通讯作者：
Brumfield, Robb T.
中科院分区：
文献类型：
--
作者：
Claramunt, Santiago;Derryberry, Elizabeth P.;Brumfield, Robb T.
扩散可以通过促进跨越障碍的地理扩张来刺激物种形成，也可以通过维持种群间的基因流动来抑制物种形成。因此，扩散能力与物种形成率之间的关系可以是正的，也可以是负的。此外，结合正面和负面影响的“中间扩散”模型预测了扩散和多样化之间的单峰关系。由于扩散能力和物种形成率都难以量化，因此关于扩散和多样化之间关系的经验证据仍然很少。使用飞行性能的替代指标和基于物种水平dna的南美大型鸟类辐射（Furnariidae）的系统发育，我们发现具有较高扩散能力的谱系具有较低的物种形成率。我们认为，地理环境的破碎化或渗透性程度以及中间扩散模型对于调和先前关于扩散与多样化之间关系的经常相互矛盾的发现至关重要。
Dispersal can stimulate speciation by facilitating geographical expansion across barriers or inhibit speciation by maintaining gene flow among populations. Therefore, the relationship between dispersal ability and speciation rates can be positive or negative. Furthermore, an 'intermediate dispersal' model that combines positive and negative effects predicts a unimodal relationship between dispersal and diversification. Because both dispersal ability and speciation rates are difficult to quantify, empirical evidence for the relationship between dispersal and diversification remains scarce. Using a surrogate for flight performance and a species-level DNA-based phylogeny of a large South American bird radiation (the Furnariidae), we found that lineages with higher dispersal ability experienced lower speciation rates. We propose that the degree of fragmentation or permeability of the geographical setting together with the intermediate dispersal model are crucial in reconciling previous, often contradictory findings regarding the relationship between dispersal and diversification.