Executive Order 11987 directed agencies to restrict the introduction of what into natural ecosystems?

Executive Order 11987 focuses on the management of natural ecosystems and specifically aims to curb the introduction of exotic species. Exotic species are non-native species that are introduced to an ecosystem either accidentally or intentionally. The concern with these species is that they can disrupt local ecosystems by outcompeting native species for resources, altering habitats, and leading to declines or extinctions of indigenous flora and fauna. The implications of introducing exotic species can be profound, potentially undermining biodiversity and ecosystem health.

This directive emphasizes the importance of protecting native ecosystems from potentially harmful foreign organisms that may not have natural predators in their new environment, thus ensuring the sustainability of local wildlife and plant populations. The concept of managing and restricting exotic species introduction aligns With the broader goals of conservation and ecological balance detailed in various environmental policies.