Harmful Algae & Red Tides


A Fatal Attraction for Harmful Algae

A Fatal Attraction for Harmful Algae

Estuaries are the borderlands between salt and freshwater environments, and they are incredibly diverse

both biologically and physically. The diversity and the high

energy of the ecosystem make estuaries remarkably resilient.

With a better understanding of these systems, we can reverse

their decline and restore the ecological richness of these

valuable, albeit muddy, environments.

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Red Tides and Dead Zones

Red Tides and Dead Zones

The most widespread, chronic environmental problem in the coastal ocean is caused by an excess of chemical nutrients. Over the past century, a wide range of human activities—the intensification of agriculture, waste disposal, coastal development, and fossil fuel use—has substantially increased the discharge of nitrogen, phosphorus, and other nutrients into the environment. These nutrients are moved around by streams, rivers, groundwater, sewage outfalls, and the atmosphere and eventually end up in the ocean.

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The Growing Problem of Harmful Algae

The Growing Problem of Harmful Algae

Harmful algal blooms are natural and they are not new. But ocean scientists are growing concerned that they are now all too common. The unprecedented growth of human activities in coastal watersheds—including agriculture, aquaculture, industry, housing, and recreation—has drastically increased the amount of fertilizer flowing into coastal waters and fueled unwanted algal growth.

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