Scholarlink

<p>Understanding lineage divergence is crucial for uncovering cryptic biodiversity. Adaptive divergence, geographic isolation and life-history traits drive speciation in heterogeneous environments. The gentoo penguin complex (<i>Pygoscelis</i> spp.), historically treated as a single species, provides an ideal system to examine divergence across its full distribution. Here, we show the existence of four divergent evolutionary lineages (northern, southern, southeastern, and eastern), supported by phylogenomic and lineage-specific selective pressures, despite ancestral gene flow. South Georgia and Macquarie individuals whose status has been debated, were included. Genomic scans reveal lineage-specific signals of positive selection in genes related to thermoregulation, oxygen transport, metabolism, and skeletal development, consistent with ecological and morphological differentiation across the Antarctic Polar Front. Future niche projections indicate severe habitat losses for three lineages, whereas the southern gentoo may expand its range. We propose a taxonomic revision recognizing four distinct gentoo penguin&#xa0;species, including <i>Pygoscelis kerguelensis</i> sp. nov., with important conservation implications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Integrative evidence reveals adaptive divergence and speciation in gentoo penguins

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月23日

查看全文
  • Daly Noll,
  • Jane Younger,
  • Luis R. Pertierra,
  • Michelle Greve,
  • Eduardo J. Pizarro,
  • Fabiola León,
  • Debora Y. C. Brandt,
  • Joshua Tyler,
  • Gemma Clucas,
  • Hila Levy,
  • W. Brian Simison,
  • Julie McInnes,
  • Pierre Pistorius,
  • Céline Le Bohec,
  • Francesco Bonadonna,
  • Phil N. Trathan,
  • Andrés Barbosa,
  • Andrea Raya Rey,
  • Gisele P. M. Dantas,
  • Rauri C. K. Bowie,
  • Elie Poulin,
  • Juliana A. Vianna

摘要

Understanding lineage divergence is crucial for uncovering cryptic biodiversity. Adaptive divergence, geographic isolation and life-history traits drive speciation in heterogeneous environments. The gentoo penguin complex (Pygoscelis spp.), historically treated as a single species, provides an ideal system to examine divergence across its full distribution. Here, we show the existence of four divergent evolutionary lineages (northern, southern, southeastern, and eastern), supported by phylogenomic and lineage-specific selective pressures, despite ancestral gene flow. South Georgia and Macquarie individuals whose status has been debated, were included. Genomic scans reveal lineage-specific signals of positive selection in genes related to thermoregulation, oxygen transport, metabolism, and skeletal development, consistent with ecological and morphological differentiation across the Antarctic Polar Front. Future niche projections indicate severe habitat losses for three lineages, whereas the southern gentoo may expand its range. We propose a taxonomic revision recognizing four distinct gentoo penguin species, including Pygoscelis kerguelensis sp. nov., with important conservation implications.