2024-12-13 ジョージア工科大学
<関連情報>
- https://research.gatech.edu/when-two-lizards-meet-first-time-scientists-witness-evolution-action
- https://www.nature.com/articles/s41467-024-54302-1
新奇な脊椎動物群集におけるプロセスからパターンへの特性変位を観察する Observing character displacement from process to pattern in a novel vertebrate community
James T. Stroud,Sean T. Giery,Robert J. P. Heathcote,Sarin Tiatragul,Michael L. Yuan,Kenneth J. Feeley & Jonathan B. Losos
Nature Communications Published:14 November 2024
DOI:https://doi.org/10.1038/s41467-024-54302-1
Abstract
Ecological character displacement, whereby shifts in resource use in the presence of competing species leads to adaptive evolutionary divergence, is widely considered an important process in community assembly and adaptive radiation. However, most evidence for character displacement has been inferred from macro-scale geographic or phylogenetic patterns; direct tests of the underlying hypothesis of divergent natural selection driving character displacement in the wild are rare. Here, we document character displacement between two ecologically similar lizards (Anolis sagrei and A. cristatellus) experiencing novel contact. We identify directional selection during the incipient stages of sympatry in a new community that corresponds to repeated trait divergence across multiple established sympatric communities. By identifying the role of natural selection as character displacement unfolds, we connect how natural selection operating at short timescales may drive broader patterns of trait distributions at larger spatial and temporal scales.
