Publicado por: pongpesca | 2020/01/03

You’ve likely never heard of the world’s greatest ocean migration. Satellite data is helping scientists study it

Phys.org“The greatest animal migration on Earth is likely something you never heard of and few have witnessed: legions of tiny marine creatures rising to the ocean surface every night to feed on tiny plants, then sinking back into the deep, dark water at dawn. Called the diel vertical migration, it was first recorded nearly 200 years ago by hauling ship nets through the water column. Today, marine scientists still sample the movement using shipboard nets. They also shoot acoustic signals into the water to track the sound “backscattering” off the zooplankton as they migrate up and down. Some collect data from aircraft, deploying a lidar system that uses a kind of laser radar to create the backscatter.”

Ver artigo completo aqui.

Fonte: Phys.org, 2 de janeiro de 2020.


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