Which invasive species is known for affecting aquatic habitats in Colorado?

The Eurasian watermilfoil is known for its significant impact on aquatic habitats in Colorado. This invasive aquatic plant grows rapidly and can form dense mats on the water's surface. These mats can obstruct sunlight, limit oxygen exchange, and hinder the growth of native aquatic vegetation. As a result, it disrupts the ecosystem, affecting fish populations and other wildlife that depend on these habitats for survival. The aggressive growth of Eurasian watermilfoil can also impede recreational activities such as boating and swimming.

In contrast, while the mountain pine beetle is a well-known pest affecting forest trees, it primarily targets coniferous forests rather than aquatic environments. Asian carp, although relevant to aquatic ecosystems, are more commonly associated with river systems and are not as prevalent in Colorado's aquatic habitats. The brown tree snake, primarily an issue in Guam, does not directly influence Colorado’s aquatic environments. Thus, Eurasian watermilfoil stands out as the invasive species with the most significant impact on Colorado's aquatic habitats.