Alder-to-Willow Ratio Trends in Browsed vs Control Ecosystems (1989-2007) #2326831 (License: Personal Use)

This bar-and-line chart illustrates the Alder:Willow ratio across four time points (1989, 1995, 2001, 2007), comparing ecosystems subjected to browsing pressure (solid black bars) versus ungrazed control sites (white outlined bars). A dashed line traces the trend for each group, revealing accelerating disparity-by 2007, the browsed ratio reaches ~17:1, while the control remains near 5:1. The data suggests browsing suppresses willow growth or favors alder dominance over time.

Used in ecology or wildlife management articles to demonstrate trophic cascade effects, especially in riparian zones impacted by ungulate browsing; targets researchers, conservationists, and students seeking empirical evidence of vegetation response to herbivory.