Sentence 1: Particularly dense erosion occurred in warmer melting periods during the ice ages , when the climate of the tundra prevailed and the soil was not protected by a strong vegetation .
Sentence 2: Particularly strong erosion occurred in warmer melting periods during the ice ages , when the climate of the tundra reigned and the soil was not protected by a dense vegetation ceiling .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?