Niche divergence facilitated by fine-scale ecological partitioning in a recent cichlid fish adaptive radiation.
Niche divergence facilitated by fine-scale ecological partitioning in a recent cichlid fish adaptive radiation.
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DOI：
10.1111/evo.13072
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发表时间：
2016-12
期刊：
影响因子：
--
通讯作者：
Day JJ
中科院分区：
文献类型：
--
作者：
Ford AG;Rüber L;Newton J;Dasmahapatra KK;Balarin JD;Bruun K;Day JJ
生态形态分化是适应性辐射的一个关键特征，在分化之后呈现专业化和生态位扩张的总体趋势。入侵新栖息地所提供的生态机会被认为是一种生态释放，促进了多样性和物种形成。在这里，我们研究了在孤立的湖泊环境中定居后，沿着食草性营养轴辐射的一种地方性的食草鱼分支的营养适应性形态和生态学，并证明了表型与环境的相关性。在系统基因组学的背景下，研究了无翅目鱼种群的生态和形态差异，以推断在辐射范围内的生态位占据。在生态学和形态上都观察到了物种分化，支持了辐射内生态物种形成的重要性。与外群类群的比较显示，在Alcolapia适应性辐射内，生态形态上的差异较大，但基因组分化较浅。祖先的形态重建表明，纳特龙湖的多面手原色胺表型在湖泊中定居，形成了与坦噶尼喀湖和马拉维湖的专业食草动物相似的各种草食形态。
Ecomorphological differentiation is a key feature of adaptive radiations, with a general trend for specialization and niche expansion following divergence. Ecological opportunity afforded by invasion of a new habitat is thought to act as an ecological release, facilitating divergence, and speciation. Here, we investigate trophic adaptive morphology and ecology of an endemic clade of oreochromine cichlid fishes (Alcolapia) that radiated along a herbivorous trophic axis following colonization of an isolated lacustrine environment, and demonstrate phenotype‐environment correlation. Ecological and morphological divergence of the Alcolapia species flock are examined in a phylogenomic context, to infer ecological niche occupation within the radiation. Species divergence is observed in both ecology and morphology, supporting the importance of ecological speciation within the radiation. Comparison with an outgroup taxon reveals large‐scale ecomorphological divergence but shallow genomic differentiation within the Alcolapia adaptive radiation. Ancestral morphological reconstruction suggests lake colonization by a generalist oreochromine phenotype that diverged in Lake Natron to varied herbivorous morphologies akin to specialist herbivores in Lakes Tanganyika and Malawi.
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DOI：
10.1098/rspb.2013.1733
发表时间：
2013-11-07
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Friedman M;Keck BP;Dornburg A;Eytan RI;Martin CH;Hulsey CD;Wainwright PC;Near TJ
通讯作者：
Near TJ
影响因子：
3.7
作者：
Day, Julia J.;Cotton, James A.;Barraclough, Timothy G.
通讯作者：
Barraclough, Timothy G.
影响因子：
4.8
作者：
Bootsma, HA;Hecky, RE;Turner, GF
通讯作者：
Turner, GF
影响因子：
2.6
作者：
Dieleman, Jorunn;Van Bocxlaer, Bert;Verschuren, Dirk
通讯作者：
Verschuren, Dirk
影响因子：
--
作者：
Grant, PR;Grant, BR
通讯作者：
Grant, BR