Case 1: The biome of a small agricultural community in the western United States changes from grassland to desert. A species of migrating duck, which can carry bird flu, goes locally extinct.
Case 2: The biome in northern Russia changes from tundra to taiga. Timber harvesting in the region becomes possible. Arctic foxes go locally extinct and are replaced by red foxes that commonly carry rabies.
Sort the consequence based on whether it would apply to Case 1, Case 2, or both: disease vector range changes
The consequence "disease vector range changes" would apply to both Case 1 and Case 2.
In Case 1, the extinction of the migrating duck species that can carry bird flu may lead to changes in the dynamics of disease vectors in the area, potentially affecting the spread of bird flu or other diseases.
In Case 2, the replacement of Arctic foxes with red foxes, which commonly carry rabies, indicates a change in the range and presence of disease vectors in that biome as well.
Therefore, the correct sorting is: both.