Long Creek Conceptual Model

This model was developed for Long Creek, a coastal plain stream in Maine. Hexagons represent sources; rectangles represent proximate stressors; ovals represent biological effects; and round-edged rectangles represent additional steps in the causal pathway. Note that invertebrate effects are also proximate stressors for brook trout, due to reductions in fish prey.

Figure 2-1. A conceptual model for increased water temperature as a candidate causal agent of biological impairment.