I think it's because of their range of tolerance.
All of the people in those populations are related.
Oceans and the carbon cycle, the oceans influance the ocean by absorbing and storing the carbon.
Answer:
The flooding of half part of the forest have successful separate the population of frogs in that ecosystem into two different set of frogs. This is an example of allopatric speciation, that is, the population become separated as a result of geographical barrier. This separation will make the two set of frog population to become new species. On the long run, the two species may become unable to relate sexually.
Explanation: