Oxygen Depletion Zones In Tropical Oceans Expanding, Maybe Due To Global Warming

13959779015_fbe280f364_z

ScienceDaily (May 2, 2008)

Scientists confirm computer model predictions that oxygen-depleted zones in tropical oceans are expanding, possibly because of climate change. An international team of physical oceanographers including a researcher from Scripps Institution of Oceanography at UC San Diego has discovered that oxygen-poor regions of tropical oceans are expanding as the oceans warm, limiting the areas in which predatory fishes and other marine organisms can live or enter in search of food.

The study, “Expanding Oxygen-Minimum Zones in the Tropical Oceans,” appears in the May 2 edition of the journal Science.

photo by Chris Combe

Si espande l’Oceano povero di ossigeno

Le acque povere di ossigeno occupano ampi volumi degli oceani tropicali orientali di profondità intermedia. Le condizioni di scarsità di ossigeno hanno infatti un impatto ad ampio raggio sugli ecosistemi, dal momento che importanti macrorganismi mobili evitano tali zone, ma anche in tal modo non riescono a sopravvivere. I modelli climatici prevedono un declino nell’ossigeno disciolto nell’oceano a causa del riscaldamento globale.

Si tratta di riduzioni significative che, se non corrette nei prossimi anni, non mancheranno di avere drammatiche e conseguenze per gli ecosistemi costieri e sulle economie basate sul loro sfruttamento.

Fonte: Le Scienze

Advertisements

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