Source: Purdue University

Large hypoxic zones low in oxygen long have been thought to have negative influences on aquatic life, but a Purdue University study shows that while these so-called dead zones have an adverse affect, not all species are impacted equally.

Tomas Hook, an assistant professor of forestry and natural resources, and former Purdue postdoctoral researcher Kristen Arend used output from a model to estimate how much dissolved oxygen was present in Lake Erie's hypoxic zone each day from 1987 to 2005. That information was compared with biological information for four fish species to assess the hypoxic zone's impact on the sustainability of their habitats.

"The term 'dead zone' sounds really scary," Hook said. "But in a lot of cases a hypoxic zone will not be negative for all fish species." 

Original news release