SHR Spatial Scales

Different approaches to rehabilitating regulated rivers exist. All may be organized according to their spatial and temporal scales.

• Quick local fixes help now to prevent population crashes, but are not sustainable alone over decades and beyond.
• System changes may some day reap benefits- assuming the underlying science is correct, though most of it remains untested even now- but these broader efforts will not save collapsing populations and food webs to get to that day.
• Here we focus on the scales relevant to rregulated river reaches downstream of large dams on major rivers with few downstream tributaries.