Warm ocean ‘blob’ could be behind mass starvation of North Pacific seabirds: study

Unprecedented death toll raises red flag for North American marine ecosystems

A new report suggests a warm “blob” of water could be behind the mass starvation of a North Pacific seabird.

According to a report published in the science journal PLOS ONE, about 62,000 dead or dying common murres washed ashore between California and Alaska between summer 2015 and spring 2016. Carcass recovery brings the death estimate up to around one million in total.

On Jan. 1 and 2, 2016, 6,540 common murre carcasses were found washed ashore near Whitter, Alaska, translating into about 8,000 bodies per mile of shoreline – one of the highest beaching rates recorded during the mass mortality event. (Photo by David B. Irons)

The report says there’s nothing to suggest the emaciated birds died from anything other than starvation.

Additionally, no murre chicks were born at breeding colonies between 2015 and 2017.

READ ALSO: Climate change threatens extinction for most birds, especially in Canada: report

Researchers linked the deaths to a “large mass of unusually warm seawater” known as the “Blob” and the strong El Niño that followed, creating a “severe marine heatwave” stretching from California to Alaska between 2014 and 2016.

In a statement, authors said the mass deaths “raise a red-flag warning about the state of marine ecosystems on the continental shelf of western North America.”

The study links to previous research suggesting that warmer marine temperatures reduce both the quantity and quality of phytoplankton – reducing the health and numbers of fish who eat them and increasing the metabolic needs of larger fish that compete with murres for food.

Researchers hypothesize that the warm water ultimately led to the birds’ mass starvation and lack of reproduction.

The murre die-off revealed a major disruption in marine food webs, with alarming declines not only in murres, but in other seabirds, commercial fish and great whales between 2016 and 2019.

Researchers say they are only beginning to understand “the mechanisms and full magnitude of effects of the 2014-16 heatwave, and what it portends if such heatwaves become stronger and more frequent, as predicted.”

READ ALSO: Three billion fewer birds in North America than in 1970, study finds



nina.grossman@blackpress.ca

Follow us on Instagram
Like us on Facebook and follow us on Twitter.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

 

Comments are closed

Just Posted

Rosslanders celebrate Canada Day in style

Locals organized a museum scavenger hunt, a Mt. Roberts flag-raising ceremony and evening fireworks

Interior Health will not expand Police and Crisis Team

Southeast Division Chief Superintendent Brad Haugli asked IH to expand the program

Hwy 1 flooding causes massive delays on certain Arrow Lakes ferry routes

Motorists have been waiting around three hours to get on ferries

Rossland Museum and Discovery Centre expands operations online

The facility also opened back up to the public earlier in June

Mills oppose Celgar’s ask for cheaper logs destined for chipper

The Castlegar mill has asked the province for a lower rate for any log that goes straight to pulp

VIDEO: Musqueam Chief captures captivating footage of bald eagle catching meal

‘This is why we have chosen to live here since time immemorial,’ Chief Wayne Sparrow’s nephew says

Police ramp up efforts to get impaired drivers off B.C. roads this summer

July is dedicated to the Summer CounterAttack Impaired Driving Campaign

Migrant workers stage multi-city action for full status amid COVID-19 risks

‘COVID-19 has exacerbated an existing crisis’

Okanagan school drops ‘Rebels’ sports team name, citing links with U.S. Civil War

Name and formerly-used images “fly in the face” of the district’s human rights policy, says board chair

PHOTOS: B.C.’s top doc picks up personalized Fluevog shoes, tours mural exhibition

Murals of Gratitude exhibit includes at least one portrait of Henry alongside paintings of health-care workers

In troubled times: Independence Day in a land of confusion

Buffeted by invisible forces and just plain worn out, the United States of America celebrates its 244th birthday

Stop enforcing sex work laws during COVID-19, advocates say

There are provisions in Canada’s prostitution laws that make workers immune from prosecution, but not from arrest

Liberal party finished 2019 having spent $43 million, raised $42 million

All political parties had until midnight June 30 to submit their financial reports for last year

B.C. teacher loses licence after sexual relationships with two recently-graduated students

The teacher won’t be allowed to apply for a teaching certificate until 2035

Most Read