Final answer:
Species richness is generally expected to be greater in older lakes due to factors such as more time for species diversification and evolution, as well as more stable and complex habitats. Therefore, you would expect species richness to be greater in a lake that was formed 100,000 years ago compared to a similar lake formed 10,000 years ago.
Step-by-step explanation:
Species richness is generally expected to be greater in a lake that is older. In this case, you would expect species richness to be greater in a similar lake that was formed 100,000 years ago compared to a similar lake that was formed 10,000 years ago.
There are several factors that contribute to higher species richness in older lakes. One factor is that older lakes have had more time for species to diversify and evolve. Additionally, older lakes tend to have more stable and complex habitats, which can support a greater variety of species. For example, older lakes may have developed more vegetation, more diverse food sources, and more diverse ecological niches for species to occupy.