The document discusses the dynamics of energy flow in a food web, specifically how species p2 competes with species p1 for resources, leading to a decreased abundance of p1. It poses a question about the effect of p2 on c1, which requires understanding different types of interactions such as direct or indirect positive or negative effects. The key concepts are the competitive relationships and their implications for species abundance within the ecosystem.

1. Q1: Reminder: the arrows are going from who is being eaten to who is doing the eating (the
direction of the flow of energy). P2 Competes with P1 for resources and this results in a lower
abundance of P1 than if P2 was not present. Describe the effect of P2 on C1. (A) Food web (B)
Interaction web A. Indirect Positive B. Indirect Negativ C. Direct Positive D. Direct Negative