Figure 1.

The Estimated Sentiment of Reintroduction Abstracts Is Associated with Meaningful Terms

(A) The most frequent terms occurring in 4,313 labeled scientific abstracts, associated with either positive (blue) or negative (red) sentiment as determined from the AFINN lexicon. “Success” drives positive sentiment, and words challenging reintroduction successes (e.g., “threaten,” “loss,” and “risk,” among others) occur with negative sentiment.

(B) Ensemble (black line) of five independent models, pooled annually, of annual sentiment shows a robust increase in sentiment with an accompanying decrease in uncertainty (gray confidence interval) over three decades. This indicates that words and sentences associated with positive sentiment are increasing over time, which, given (A), suggests that reintroduction science is achieving positive results and becoming more successful over the last 30 years. ave, ensemble model average; sd, standard deviation.