Final answer:
The decline in the number of Native American communities on maps from the 1500s to the 1700s is attributable to European colonization, which led to land dispossession, cultural assimilation, and demographic collapses due to war and disease.
Step-by-step explanation:
Between 1500 and 1700, the Native American communities underwent significant changes primarily due to European colonization. The arrival of European settlers led to the loss of Native American territories and drastic population declines. Causes included wars, forced removals, and the introduction of new diseases to which Native Americans had no immunity. This period saw many tribal confederacies and independent bands lose their autonomy and land, culminating in the creation of reservations. These factors significantly reduced the visibility of Native American communities on maps as European geopolitical claims overtook Native lands.
European misunderstanding of Native American land use and the imposition of European concepts of land ownership disrupted Native societies. The cultural assimilation policies, along with the introduction of European goods and weapons, altered traditional ways of life and power dynamics between tribes. Over time, the Native American populous decreased, and European colony names and boundaries replaced native community representations on maps. This reflects the broader impacts of colonization on indigenous populations.