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This ‘algae’ is a colorful coastal catastrophe

August 9, 2016Beach News Serviceasbpa_web

It’s an inland (and upland) problem with a serious coastal impact… and experts warn conditions in the future could make it even more prevalent in our coastal ecosystems.

The issue is colloquially referred to as “blue-green algae” (actually, cyanobacteria), which can produce harmful toxins. Florida is facing cyanobacteria-contaminated waters now, particularly on the east coast where Lake Okeechobee (source for the freshwater bacteria, which is very resistant to salt water) drains into the Atlantic. But these blooms have occurred on the Atlantic, Pacific and Gulf coasts and on the Great Lakes, with increasing regularity and growing scope and longevity. This isn’t just a U.S. problem, by the way – China, for one, has seen serious blooms in recent years, as have other areas in the Pacific Ocean.

Experts predict we could see more of these deadly blooms in the years ahead if conditions are left unchanged. Why? Because the conditions that spawn them are likely to become more prevalent and persistent.

  • Climate change means warmer waters both inland and nearshore – which algae loves.
  • Unless extensive (and expensive) action is taken to clean runoff and move away from septic systems, nutrient levels will continue to rise in inland waters, feeding the blooms that eventually head to the coast.
  • More summer rainfall and sea level rise (which promote brackish shallow areas of water ripe for this bacteria) could likewise contribute to “perfect storm” conditions for bacteria blooms similar to what we have seen lately.

The impact is equally serious all across the ecosystem. By reducing the dissolved oxygen while releasing toxins in the water, these blooms wreak havoc with fish, plants, birds and anything else that relies on clean water to thrive. That can include humans, who can be sickened by inhaling or ingesting the toxins – so the potential impact to drinking water drawn from contaminated areas is equally distressing.

And, of course, the recreational (and, therefore, economic) impact of these blooms on boating, fishing and beach usage is substantial and lingering. How bad? In addition to the actual closure of beaches and waterways due to high levels of toxins from a bloom, imagine trying to erase the images of pea-soup-green waters along your coastal or riverine waters in the minds of tourists with long memories and plenty of other vacation choices.

What can coastal advocates and managers do?

  • Support efforts to reduce nutrient runoff into waterways, both coastal and inland. This can be fertilizer, animal waste, septic system runoff and more.
  • Look at natural and infrastructural responses that can control the nutrient impact, including storage and filtration methods.
  • Similarly, support water monitoring programs that help assess the damage and support a scientific response to algae and all manner of pollution and degradation issues.
  • Work with inland areas equally affected by blooms to come up solutions – and not to blame each other for the problem to begin with.
  • Obviously, support sound science on the issues of climate change and nutrient impacts across ecosystems. Then, use this sound science to support sound policies (with the necessary funding) to address the conditions that foster this kind of festering.

The problems that have spawned these toxic algae blooms took years (decades) to develop, so obviously solving the dilemma may take just as long. The danger is that the longer action is delayed the worst the environmental damage can be – and the more expensive any reasonable repair will become.
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ABOUT ASBPA: Founded in 1926, the American Shore & Beach Preservation Association (ASBPA) is a 501(c)3 nonprofit that advocates for healthy coastlines by promoting the integration of science, policies and actions that maintain, protect and enhance the coasts of America. For more information on ASBPA, go to www.asbpa.org, Facebook or www.twitter.com/asbpa. For information, to change your email address or to unsubscribe from this list, contact us at managing@asbpa.org. A complete collection of Beach News Service articles is available for media access online at. https://asbpa.org/publications/american-beach-news-service/

Tags: algae, blue-green algae, harmful algal blooms, toxins

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