The pygmy mammoth was able to thrive in all of the many different ecosystems found on Santa Rosae, such as high elevation plateaus, to dune, grassland, riparian and steppe-tundra ecosystems. Their fossils are found in the Channel Islands and in the California Channel. The evidence of their habituation in all of those diverse dwellings is revealed by the pollen and plant pieces found in sediments and in dung. In addition, each habitat has a specific isotope mark from the unique types of soil, plants and water. These mammoths sometimes modified their habitats, specifically in Channel Islands, where they created more spacious grassland in result of their roaming.