Threat of oxygen-poor 'dead zones' surfacing on BC central coast

Threat of oxygen-poor 'dead zones' surfacing on BC central coast

The spectre of low-oxygen “dead zones” is surfacing along BC’s Central Coast, threatening the region’s rich marine ecosystems and fisheries.  Widespread hypoxia — when oxygen levels in the ocean fall below levels required by marine life — is being detected in the deep waters of Queen Charlotte Sound for the first time, said Sam Stevens, an oceanographer at the Hakai Institute and lead author of a new study.  Aggravated worldwide by climate chang…