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Less Fish More Nitrogen

Feb 06,2008 SACN


Nitrogen levels in coastal waters are increasing as a result of human activity.

For a number of reasons, that isn't at all good for the marine environment.

One way in which some of that nitrogen is removed is by taking fish out of the sea, returning the nitrogen to the land.

However, declining fish stocks means that fewer fish are being taken, reducing the amount of nitrogen that is removed, with a further negative impact on the fish stocks themselves.

The answer isn't simply to remove more fish, but to take action to restore fish stocks so that more fish (and therefore more nitrogen) can be removed in future.

Just one more example of the benefits of managing fisheries for the long term health of the marine environment, whilst obtaining maximum benefit for the human population.

Bad News For Coastal Ocean: Less Fish Out, Means More Nitrogen In

Abridged from:  Science Daily

Full text: http://www.sciencedaily.com/releases/2008/01/080124132431.htm

A Canada-U.S. research team has found that commercial fisheries play an unexpected role in the decline of water quality in coastal waters. 

In a recent issue of Nature Geoscience, Roxane Maranger and Nina Caraco explain that the collapse of the fisheries from decades of over fishing has played a significant role in disturbing the balance between nitrogen entering and leaving costal water systems. 

The study, the first to examine the world's 58 coastal regions, shows how failing to maintain ecosystems in a sustainable manner has wide-ranging consequences.

See also: The Most Important Fish You've Never Heard of



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