The loss of competitive fitness in the calcifying alga had strong impacts on the ecosystem. (sciencedaily.com)
It takes extreme commitment, time management, and focus to train as a varsity or collegiate athlete, a marathon runner, or participate in competitive fitness competitions (i.e. Spartan Race, Iron Man, Tough Mudder). (feedspot.com)
Unfortunately, that is what happened, and it led to two myths about evolution that persist today: that there is a prescient directionality to evolution and that survival depends entirely on cutthroat competitive fitness. (scientificamerican.com)