Change in Impact

We focused on two ways to analyze and present how cumulative human impact on the ocean changed over the five years of our study (2008 to 2013). The first (top map) shows the absolute change in cumulative impact scores for every single patch of ocean. The highest score in either period was 11.1, so increases of two to three points represent substantial changes. The second (bottom map) classifies patches of ocean as scoring high or low in its current cumulative impact and indicates the trend as strongly increasing or strongly decreasing. Each of these scenarios present different conservation priorities, challenges, and strategies.