What is the relationship between temperature and urchin survival?

The relationship between temperature and urchin survival varies based on the species of urchin. Generally, urchins are more resilient and can survive a wider range of temperatures than many other marine organisms. However, extreme temperatures, both cold and hot, can be detrimental to their survival.

Urchins are ectothermic animals, meaning their body temperature is determined by the ambient temperature of their environment. They are able to tolerate a wide range of temperatures, but they do have optimal temperature ranges for growth and survival.

High temperatures can increase the metabolic rate of urchins, leading to increased energy expenditure and potentially stress on their bodies. Prolonged exposure to high temperatures can also lead to heat stress and mortality in urchins. On the other hand, cold temperatures can slow down the metabolic rate of urchins, potentially leading to reduced activity and growth. Extremely cold temperatures can also be lethal for urchins.

Overall, fluctuations in temperature beyond the optimal range can have negative effects on urchin survival and can impact their populations. Climate change and rising sea temperatures are of particular concern for the survival of urchin species in the future.