What’s the deal with upwelling?


Phytoplankton is the foundation of the ocean food web. But it needs two things to grow: sunlight and nutrients. Sunlight is plentiful on the ocean surface where plankton float. Nutrients, not so much. Instead, they are at the bottom of the ocean where decaying organic matter sinks down to.

This is where upwelling kicks in. When strong winds blow across the surface of the ocean, it pushes water away. This water is then replaced by deeper water from beneath, bringing  nutrients with it. These nutrients act as fertilizer for phytoplankton, increasing their growth, and subsequently the fish and other marine feeding activity across the food web.

One of the greatest places to experience upwelling is the California coast near San Francisco. Here, upwelling produces nutrient rich waters that provide a smorgasbord of good marine eating.




image: NOAA


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s