LEO Network

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The LEO Network is a worldwide network of observers and experts that share their observations of environmental change.
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Observations

High clam mortality rate forces closure on east Cook Inlet next year
An approximate 69% of adult razor clams at Ninilchik beaches and 84% at Clam Gulch beaches have died. The department said the cause of the high natural mortality rate of the clams remains unknown, but may be due to a combination of heavy surf, habitat changes, environmental stressor and predation.
Clam Gulch, Alaska, United States
Peninsula Clarion

Invasive European green crab found in Nuu-chah-nulth territories
The Lummi Nation has declared a disaster after removing 70,000 invasive European green crabs from their sea pond in November.
According to Seattle-based King News, the Lummi Nation cultivates shellfish and juvenile salmon in their 750-acre sea pond. The European green crab preys on young oysters, clams, and are known to dig down into the sand, uprooting eel grass, which is habitat for juvenile salmon.
Marietta-Alderwood, Washington, United States
Ha-Shilth-Sa

Harmful algae colours the Oslo fjord green
Scientists now say that the harmful alga will survive the winter and that it will probably turn green in the Oslo fjord next year as well.
Oslofjord, Oslo, Norway
NRK
Lea Girolami Bråthen, Dag Aasdalen, Maren Nan Myrseth

Jellyfish attack nuclear power plant
Scotland’s only working nuclear power plant at Torness shut down in an emergency procedure this week when jellyfish clogged the sea water-cooling intake pipes at the plant. To protect marine life and avert nuclear disasters, scientists are investigating the use of drones to provide estimates of jellyfish locations, amounts, and density.
Torness Power Station, Scotland
Bulletin of the Atomic Scientists

Gumboot Chiton Cryptochiton stelleri Die-off
We saw over 100 on a 1/2 mile stretch of beach. I am wondering if the chiton die-off is related to the stormy conditions or something else?
Coupeville, Washington, United States

Valuable crab populations are in a ‘very scary’ decline in warming Bering Sea
King and snow crab populations in the Bering Sea have plummeted ahead of the harvest season, some by 99% compared to previous years.
Bering Sea
The Seattle Times

An invasive parasite is taking over Alaska blue mud shrimp. Researchers want to kill it.
Orthione griffenis, or O. griffenis, eventually kills its host shrimp, and soon the remaining shrimp can’t find each other to reproduce, rendering a blue mud shrimp population extinct.
Sitka, Alaska, United States
Alaska Public Media

Large jellyfish threaten fisheries in the Sea of Japan
Swarms of giant jellyfish are floating along the coastline of the Sea of Japan, and the damage they may cause to fisheries is feared to be the worst in more than a decade.
Wakasa Bay, Japan
The Japan News

Decrease in Prawn Abundance of Desolation Sound
It is apparent that this area of coastline has experienced a sharp decline in its prawn populations. This may be due to increased fishing pressure from commercial prawn fishermen.
Powell River, British Columbia, Canada
David Oswald, Cody Thomas, Conlan Magel, Tom Okey

Marine vomit spread along the western coast of Norway
A self-cloning and invincible enemy invades coastal areas. The carpet sea squirt (Didemnum vexillum) or “marine vomit” have been observed nearby Stavanger and Bergen. Large yellow flakes has spread on the seabed and kills everything beneath. It may grow on boats and can spread along the coast.
Engøysundet, Stavanger, Rogaland, Norway
NRK
Josef Benoni Ness Tveit, Håkon Mannsåker

Sea cucumber die-off near Vancouver Island
When Kathleen Reed descended for her usual weekly dive off the coast of Nanaimo, B.C., last Saturday she was shocked by how many dead sea cucumbers she saw. Experts and harvesters fear that sea cucumbers are being hit by an illness similar to sea star wasting disease.
Dolphin Beach, British Columbia, Canada
CBC

Not seeing as many earthworms after rain events
"This year I walked along the same route after a rainstorm and see only one or two — sometimes none"
Anchorage, Alaska, United States
Kimberly Porter, Luke Williams, Derek Sikes

He has lived for 74 years – for the first time the river is dry
Extreme drought in the west means that households with private waterworks are out of water. Elvar's dried up. "The situation is very serious," he says.
Skinlo, Breim, Vestland, Norway
NRK

Seeing some Worms in Kenai Salmon
About 10% of our catch during dip net fishing at mouth of Kenai River was harboring these worms.
Kenai River, Alaska, United States
Jayde Ferguson, Mike Brubaker, Ian Williams

Sea Life Die-Off Found on Beach
"While on a field trip for work, we stopped at the beach and you can notice hundreds of dead clams and star fish littering the beach."
Elim, Alaska, United States
Carol Oliver, Derek Sikes, Leigh Takak, Gay Sheffield, Racheal Lee

B.C.'s heat wave may be to blame for several cases of shellfish poisoning
Several people have fallen ill with food poisoning after eating shellfish in B.C. in the last 10 days, and health officials are warning that warm ocean waters might be to blame.
Vancouver, British Columbia, Canada
CBC

Blue mussel die-off in Skagway
"The first wave of dead mussels washed ashore on July 14th, possibly earlier but this was the first report we received. I took the pictures included in my LEO observation on July 16th, and the temperatures were only just then beginning to climb into the upper 70s and lower 80s."
Skagway, Alaska, United States
Kris Holderied, Mandy Lindeberg, Reuben Cash

European Skipper (Thymelicus lineola) in Northwest, BC
A European Skipper butterfly is observed in Northwest BC, an introduced species and one of several stressors underlying insect declines.
Smithers, British Columbia, Canada

Intertidal life after significant heat wave
In Malahat Drive in BC, an extraordinary heat wave, combined with low tides during the middle of the day resulted in the die off of possibly billions of intertidal invertebrates along the coast of British Columbia and Washington State.
Malahat Drive

Extreme heat cooks shellfish alive on Puget Sound beaches
A record-shattering heat wave June 26-28 coincided with some of the year's lowest tides on Puget Sound. The combination was lethal for millions of mussels, clams, oysters, sand dollars, barnacles, sea stars, moon snails, and other tideland creatures exposed to three afternoons of intense heat.
Anacortes, Washington, United States
KUOW

Paralytic Shellfish Toxin Advisory
The Southeast Alaska Tribal Ocean Research program found that all shellfish species in Settler's Cove and Seaport Beach in Ketchikan and Starrigavan North beach in Sitka are affected by high levels of Paralytic Shellfish Toxin, posing the risk of Paralytic Shellfish Poisoning for consumers.
Ketchikan, Alaska, United States
Southeast Tribal Ocean Research

Turkey struck by ‘sea snot’ because of global heating
Increasing blanket of mucus-like substance in water threatens coral and fishing industry
Sea of Marmara
the Guardian

Washed up - euphausiid shrimp on area beach
Thousands of euphausiid shrimp, the species identified here in Resurrection Bay as Thysanoessa spinifera. were washed into the intertidal zone and on the beach near Whittier
Whittier, Alaska, United States
Gary Freitag, Melissa Good, Amy Holman, Sunny Rice, Tuula Hollmen, Julie Matweyou, Kris Holderied, Richard Hocking

Alaskans urged to destroy moss balls that could contain invasive mussels
Last week, Alaska became one of at least 32 states to report finding zebra mussels in a product called moss balls which were sold at local pet stores.
Anchorage, Alaska, United States

Large crayfish spotted in Osoyoos Lake
"I've seen some way bigger than that, like a baby lobster."
Osoyoos Lake, British Columbia, Canada
INFOnews

Zebra mussels on Marimo moss balls are causing an emergency in WA
Moss balls imported from Ukraine to pet shops in the United States have been found to house the invasive Zebra mussel. Once in bodies of water, this mussel reproduces rapidly and wreaks havoc on ecosystems.
Seattle, Washington, United States
Crosscut

Marine species wash up on beaches as red tide hits West Coast
A harmful algal bloom, better known as a red tide, has been building up at Elands Bay on the West Coast, about 220km north of Cape Town.
Cape Town, Western Cape, South Africa
African News Agency

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