伴随深海鮟鱇鱼持续辐射的进化约束减少

IF 13.9 1区 生物学 Q1 ECOLOGY
Elizabeth Christina Miller, Rose Faucher, Pamela B. Hart, Melissa Rincón-Sandoval, Aintzane Santaquiteria, William T. White, Carole C. Baldwin, Masaki Miya, Ricardo Betancur-R, Luke Tornabene, Kory Evans, Dahiana Arcila
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引用次数: 0

摘要

在一个新的栖息地殖民之后,往往会出现表型多样化的生态机会。然而,如果某些栖息地所面临的环境挑战很少能提供进化的解决方案,那么这些栖息地就会比其他栖息地具有更多的限制。我们研究了鮟鱇鱼(鲈形目)在生境转换后对宏观进化多样化的推拉作用。我们通过广泛的取样(1,092 个位点和约 38% 的物种),结合来自博物馆标本的三维表型数据,构建了一个系统发生。我们利用这些数据集研究了表型多样化的速度和模式。深海中上层鮟鱇鱼起源于底栖动物的祖先,不久之后经历了快速的品系分化。在这一转变过程中,鮟鱇鱼的颌部变大、眼睛变小,体型更加横向压缩。尽管出现了这些方向性的趋势,但这一品系在身体、头骨和颌的形状方面仍然进化出了很大的表型差异。特别是,深海鮟鱇鱼在身体伸长方面表现出很高的变异性,而底栖鮟鱇鱼则受限于最佳形状。在这一辐射范围内,表型进化主要集中在新近分化的品系中,尤其是那些偏离典型球状体型的品系。综上所述,这些结果表明,即使在生态资源匮乏、生理挑战严峻的环境中,也能发生惊人的进化辐射。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Reduced evolutionary constraint accompanies ongoing radiation in deep-sea anglerfishes

Reduced evolutionary constraint accompanies ongoing radiation in deep-sea anglerfishes

Colonization of a novel habitat is often followed by phenotypic diversification in the wake of ecological opportunity. However, some habitats should be inherently more constraining than others if the challenges of that environment offer few evolutionary solutions. We examined this push-and-pull on macroevolutionary diversification following habitat transitions in the anglerfishes (Lophiiformes). We constructed a phylogeny with extensive sampling (1,092 loci and ~38% of species), combined with three-dimensional phenotypic data from museum specimens. We used these datasets to examine the tempo and mode of phenotypic diversification. The deep-sea pelagic anglerfishes originated from a benthic ancestor and shortly after experienced rapid lineage diversification rates. This transition incurred shifts towards larger jaws, smaller eyes and a more laterally compressed body plan. Despite these directional trends, this lineage still evolved high phenotypic disparity in body, skull and jaw shapes. In particular, bathypelagic anglerfishes show high variability in body elongation, while benthic anglerfishes are constrained around optimal shapes. Within this radiation, phenotypic evolution was concentrated among recently diverged lineages, notably those that deviated from the archetypical globose body plan. Taken together, these results demonstrate that spectacular evolutionary radiations can unfold even within environments with few ecological resources and demanding physiological challenges.

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来源期刊
Nature ecology & evolution
Nature ecology & evolution Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
22.20
自引率
2.40%
发文量
282
期刊介绍: Nature Ecology & Evolution is interested in the full spectrum of ecological and evolutionary biology, encompassing approaches at the molecular, organismal, population, community and ecosystem levels, as well as relevant parts of the social sciences. Nature Ecology & Evolution provides a place where all researchers and policymakers interested in all aspects of life's diversity can come together to learn about the most accomplished and significant advances in the field and to discuss topical issues. An online-only monthly journal, our broad scope ensures that the research published reaches the widest possible audience of scientists.
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