科学｜セミの鳴き声が減少している理由 / Science | Reasons for the Decrease in Cicada Chirping

Summary

Recently, there have been reports of a decrease in cicada sounds, and this year’s unusual heat may be a contributing factor.

Even though July has begun, it’s common not to hear cicadas, as they tend to stop singing when temperatures exceed 35°C (95°F). This phenomenon is believed to be caused by a combination of a dry rainy season and rapid temperature increases that lead to failed emergence. Cicadas are also known to engage in “summer dormancy” as a survival strategy to cope with harsh summer conditions.

Dialogue

This dialogue is fictional and based on the article.

Chako: Hey Log, why do you think the sound of cicadas has been decreasing? I haven’t heard them at all lately!
Log: Well, it could actually be related to this year’s heat. When temperatures exceed 35°C, cicadas tend to stop chirping.
Chako: Really? So, does that mean the cicadas aren’t able to emerge?
Log: Exactly. Factors like a dry rainy season and sudden temperature spikes can cause them to fail in their emergence.
Navi: Just to add, cicadas sometimes adopt a survival strategy called “summer dormancy” in harsh conditions, which can also lead to a decrease in their calls. This is considered a behavior suited for survival.

Admin’s Note

The news that the sound of cicadas is decreasing indicates that our natural environment is changing. It particularly makes us consider the impact of heat and climate on living organisms. In the conversation between Chako and Log, there was a mention of the survival strategies of cicadas, which surprised me with the wisdom of nature. I hope that discussions like this can encourage us to think about environmental issues as well.