長期研究で進化の秘密を解明:ダーウィンの実地観察が支える成果(Nature’s Time Machine: How Long-Term Studies Unlock Evolution’s Secrets)

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2025-03-19 ジョージア工科大学

ジョージア工科大学の研究者は、進化の過程を解明するために長期研究がいかに重要かを強調したレビュー論文を発表した。ガラパゴス諸島でのダーウィンフィンチの40年にわたる野外観察や、バクテリア75,000世代にわたる実験室内進化などの事例を紹介し、新種形成や代謝能力の進化など、短期研究では捉えられない進化現象を明らかにしている。また、進化の速度は技術では早められず、継続的な観察が不可欠であると強調。気候変動や環境変化が進む現代において、生物の適応を実時間で把握する長期研究の必要性がますます高まっている。

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長期的研究が進化に関するユニークな洞察をもたらす Long-term studies provide unique insights into evolution

James T. Stroud & William C. Ratcliff
Nature  Published:19 March 2025
DOI:https://doi.org/10.1038/s41586-025-08597-9

長期研究で進化の秘密を解明:ダーウィンの実地観察が支える成果(Nature’s Time Machine: How Long-Term Studies Unlock Evolution’s Secrets)

Abstract

From experimental evolution in the laboratory to sustained measurements of natural selection in the wild, long-term studies have revolutionized our understanding of evolution. By directly investigating evolutionary dynamics in real time, these approaches have provided unparallelled insights into the complex interplay between evolutionary process and pattern. These approaches can reveal oscillations, stochastic fluctuations and systematic trends that unfold over extended periods, expose critical time lags between environmental shifts and population responses, and illuminate how subtle effects may accumulate into significant evolutionary patterns. Long-term studies can also reveal otherwise cryptic trends that unfold over extended periods, and offer the potential for serendipity: observing rare events that spur new evolutionary hypotheses and research directions. Despite the challenges of conducting long-term research, exacerbated by modern funding landscapes favouring short-term projects, the contributions of long-term studies to evolutionary biology are indispensable. This is particularly true in our rapidly changing, human-dominated world, where such studies offer a crucial window into how environmental changes and altered species interactions shape evolutionary trajectories. In this Review article, we showcase the groundbreaking discoveries of long-term evolutionary studies, underscoring their crucial role in advancing our understanding of the complex nature of evolution across multiple systems and timescales.

生物工学一般
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