February 14, 2016 — In his letter, “Menhaden are critical for bay restoration,” Tscharner D. Watkins III begins with a protracted discussion of the Chesapeake Bay ecosystem before resorting to hyperbole. Referring to the menhaden, he states “these filter feeders kept our waters clear, much like the waters in the Caribbean.”
The Chesapeake Bay is a tidal estuary of the Atlantic Ocean — which is also fed by more than 150 streams and rivers within its watershed, emanating from six states and the District of Columbia. Thus it contains the same saline waters of the Atlantic, but has not borne within the past (nor does it continue to bear) any resemblance to the more pristine waters of the Caribbean Sea.
The marine dead zones are hypoxic waters which are so depleted of oxygen that they are unable to support life, resulting oftentimes in massive fish kills. The oxygen-robbing algal blooms which are symptomatic of the hypoxia are caused by the problematic runoff of residential, agricultural and industrial effluent throughout the watershed. Therefore, the menhaden are ill-affected by the disruption in the marine food chain, but should not necessarily be regarded as the root cause of the hypoxia.