The hypoxic zone in the Gulf of Mexico is not unique at leas

The hypoxic zone in the Gulf of Mexico is not unique at least 200 dead zones exist at estuaries and along seacoasts worldwide. These low-oxygen regions share many of the same causes and they all have ecological and economic repercussions for ecosystems and people. Fortunately, we can pursue strategies to lessen the number, severity, and impacts of dead zones. The following answers for the Causes and Consequences features are examples and are not intended to represent a comprehensive list. In addition, the sequence of items is not meant to connote relative importance. Sort the examples below into the appropriate bin. Think about which factors contribute to the development of dead zones (the cause), the consequences that result from dead zones, and possible solutions.

Solution

Cause: nutrient runoff from agricultural fertilisers, manure, and urban sources, which lead to rapid algal growth and subsequent bacterial decompostion.

Cosequences: economis losses for fisheries, death of aquatic organisms that cannot escape, shifts in marine food web

Results: policies to promote no-till agriculture, reduction of fertiliser use to decrease nutrient pollution from farms, construction of wetlands to absorb nutrients,