LEO Network

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

Observations

Researchers Are Using Catfish to Combat Sea Urchins
Researchers have relocated 20 Atlantic catfish to artificial kelp forest units in Melkøy Sound, Northern Norway, to test if reintroducing sea urchin predators can help restore kelp forests overgrazed by booming sea urchin populations.
Melkøy Sound, Troms og Finnmark, Norway
High North News

Gardeners, Academic at Odds on How to Best Deal with Growing Japanese Beetle Population
Japanese beetles are aggressively feeding on ornamental and edible plants in the Halifax area, prompting debate between experts who recommend labor-intensive hand removal and gardeners using pheromone traps that may attract more beetles.
Dartmouth, Nova Scotia, Canada
CBC News

Tick observations double compared to last year – permanent tick population established in Rovaniemi
Tick observations in Lapland have doubled year-on-year, and a University of Turku study reports that a stable tick population is now established in Rovaniemi.
Rovaniemi, Lapland, Finland
Lapin Kansa

Catches of salmon in Chukotka exceed the indicators of previous years
Salmon catches in Chukotka have significantly surpassed previous years' records, with a notable increase of 64.5% compared to 2023, highlighting an unexpected abundance in the region's fishery.
Anadyr, Chukotskiy Avtonomnyy Okrug, Russia
prochukotku.ru

New Trap to Stop Pink Salmon in the Tana River
The Norwegian Veterinary Institute begins building a trap at Seida to sort out invasive pink salmon migrating up the Tana River.
Seida, Tana Municipality, Troms og Finnmark, Norway
NRK Troms og Finnmark

Fish Hatchery Ships Over 60,000 Nelma Fingerlings for Release into Lake Keta
On June 11, 2025, a Norilsk fish incubation plant delivered more than 60,000 nelma juveniles to be released into Lake Keta as part of Nornickel’s ongoing efforts to replenish regional fish stocks.
Norilsk, Krasnoyarsk Krai, Russia
Taimyr Telegraph

Ticks are surging and spreading across the U.S. – here’s how to protect yourself
Tick populations are surging in the United States. Binghamton University experts offer tips to avoid tick bites. -
Binghamton, New York, United States
Ticks are surging and spreading across the U.S. – here’s how to protect yourself | Binghamton News - Binghamton University

Annual meeting highlights positive trends for Western Arctic Caribou Herd though there is no population count this year
Despite the inability to conduct a population count this year due to weather conditions, recent data indicates slightly improved survival rates for cows and calves in the Western Arctic Caribou Herd, offering a glimmer of hope amid ongoing concerns about the herd's decline.
Northwest Arctic, Alaska
Anchorage Daily News

Christmas Bird Count spots more than 8,000 birds
The 2024 Christmas Bird Count in Homer, Alaska, recorded over 8,000 birds across 64 species, despite challenging weather conditions.
Homer, Alaska, United States
Peninsula Clarion

Deer are cute, but their over-abundance is bad news for B.C. forests, birds. Here's why.
Deer populations in southwestern British Columbia have expanded beyond historical levels, causing significant harm to forest plants and bird species. This article explores the impacts and possible solutions to manage deer populations and restore ecological balance.
Southwestern British Columbia, Canada
Vancouver Sun

Small fish size linked to poorer runs of Chinook in Alaska's biggest rivers
A study identifies shrinking salmon size as a factor affecting Chinook salmon productivity in Alaska's Yukon and Kuskokwim rivers, impacted by conditions like extreme temperatures and high runoff.
Yukon and Kuskokwim Rivers, Alaska, United States
Alaska Beacon

Halibut catch, sizes below normal again as Gulf fishery closes
The 2024 Pacific halibut fishing season has ended with below-average catches and fish sizes across Alaska's fisheries. The decreasing size of halibut poses a threat to their population, as smaller females produce significantly fewer eggs, raising concerns for future stock sustainability.
Kodiak, Alaska, United States
Kodiak Daily Mirror

Bristol Bay's sockeye run surpasses forecast, but fishermen face low prices
The Bristol Bay sockeye salmon run exceeded forecasts in 2024, but fishermen earned lower-than-expected profits due to smaller fish sizes and poor market conditions.
Bristol Bay, Alaska, United States
KDLG

Alaska's total commercial salmon harvest this year was ultra-low in both quantity and value
Alaska's commercial salmon harvest in 2024 hit the third lowest recorded since 1985 both in fish quantity and financial returns.
Juneau, Alaska, United States
Juneau Empire

Lowest commercial harvest on record highlighted in 2024 preliminary figures
The Alaska Department of Fish and Game's preliminary report for 2024 shows a record low in Norton Sound's commercial fishery, with an exvessel value of $146,326 from a salmon harvest of 21,490. Statewide salmon harvests declined by 56% from the previous year.
Norton Sound, Alaska, United States
KNOM Radio Mission

Dire condition of Alaska's seafood industry has many causes and no easy fixes, experts say
Alaska's seafood industry is facing significant challenges due to climate change, geopolitical factors, and economic pressures. Efforts to address these issues are underway, but solutions are complex and require substantial investment and policy change.
Alaska, United States
Alaska Beacon

A dog on Prince of Wales Island is helping to conserve wolves by tracking their poop
A trained Australian Shepherd named Barley is aiding conservation efforts by locating wolf scat on Prince of Wales Island, providing crucial data for wildlife management.
Craig, Alaska, United States
Alaska Public Media

Marquee Alaska sockeye run was bigger than expected, but the individual fish were small
Alaska's largest sockeye salmon run exceeded expectations in numbers but featured the smallest fish on record, posing challenges for commercial harvest.
Bristol Bay, Alaska, United States
Alaska Public Media

Moose hunting closed for 22C and 22D
Moose hunting in Alaska's Game Units 22C and 22D was closed after hunters quickly reached the quota, with a record 40 moose harvested in 22C in just two days.
Nome, Alaska, United States
The Nome Nugget

Bristol Bay sees smallest sockeye sizes on record, despite large run
Sockeye salmon returning to Bristol Bay this year were, on average, the smallest the Alaska Department of Fish and Game has ever seen. So far, the average weight of Bristol Bay sockeye was 4.2 pounds this year. Fish and Game biologist Stacy Vega said that’s the smallest average weight on record.
Dillingham, Alaska, United States
Alaska Public Media

Studies show there are likely more ‘sushi worms’ in Alaska salmon and other fish than there used to be
These worms, present in halibut, cod, salmon and other saltwater fish, are increasing. If the worms are well frozen or cooked, they don’t pose a health threat.
Anchorage, Alaska, United States

National Park Service bans sport hunters from baiting bears
The National Park Service has banned sport hunters from baiting bears in Alaska's National Park Service-managed Preserves, citing safety and wildlife conservation concerns.
Alaska, United States

No clamming in Ninilchik or Clam Gulch this year
Adult abundance “well below” fishery thresholds on both beaches. This outcome was not unanticipated, as the department said when opening the fishery in Ninilchik last year that adult abundance met necessary thresholds for allowing harvest — at least meeting or exceeding 50% of the historical average — but juvenile abundance was low, meaning there would likely not be enough adult clams this year or next.
Homer, Alaska, United States
Homer News

An influx of chum salmon in the Canadian Arctic could be the same fish missing from Western Alaska
An increase in chum salmon in the Canadian Arctic, potentially linked to climate change, may be the same fish missing from Western Alaska, raising ecological concerns.
Aklavik, Northwest Territories, Canada

Japan to start hunting fin whales after five years of commercial whaling
Japan plans to expand its commercial whaling to include fin whales, five years after resuming whaling and leaving the IWC.
Japan
The Japan Times

Whale fight: Right-wing leader wants to shoot more and market whales abroad
A right-wing leader advocates for increased whale hunting and international marketing of whale meat, despite global regulations and declining participation in the industry.
Norway
NRK

Beaver expansion into Alaska’s Arctic tundra presents problems for people – and opportunities
Beavers are transforming Alaska's Arctic tundra, creating both challenges for local communities and ecological opportunities, as their population and dam-building activities alter landscapes and affect permafrost.
The Arctic
Alaska Beacon

Hatcheries hurt nearly all wild salmon populations, study finds
A comprehensive analysis of over 200 studies reveals that fish hatchery programs have predominantly negative impacts on wild salmon populations, reducing genetic diversity and overall health.
Pacific Ocean
ArcticToday

Northern states prepare for battle against invasion of feral Canadian ‘super pigs’
Northern states are implementing measures to prevent the spread of invasive "super pigs" from Canada, which are a crossbreed of wild boar and domestic swine, causing significant ecological and agricultural damage.
Canada
Anchorage Daily News

Western Arctic Caribou Herd keeps shrinking, 2023 census shows
The Western Arctic Caribou Herd in Alaska has continued to decline, with a 7% decrease in population from the previous year, prompting concerns about the need for harvest reduction to preserve the herd.
Kobuk, Alaska, United States
Anchorage Daily News

Slithering their way in: Common garter snakes are no longer a rarity in southwestern Newfoundland
Common garter snakes are no longer rare in southwestern Newfoundland, and researchers are conducting genetic work to determine their origin.
Newfoundland and Labrador, Canada
Saltwire

Does monkshood, a purple flower that grows abundantly in Alaska, pose a danger to hikers and gardeners?
Monkshood, a common yet highly poisonous plant in Alaska, has seen an unusual bloom this year, raising concerns about its safety among hikers and gardeners. Experts affirm that while the plant is toxic, casual contact is unlikely to cause harm.
Alaska, United States

Hot, dry N.W.T. weather keeping the mosquitoes down or for now
An entomologist who works with the N.W.T. government said mosquito populations throughout the territory are lower than average. That’s because most types of mosquitoes "love water," and conditions in parts of the territory have been hot and dry instead.
Yellowknife, Northwest Territories, Canada
CBC

One gardener’s ambitious plan to plant half a million carrots is growing Kodiak’s local food movement
You could say Dave Jackson is Kodiak’s carrot kingpin. Carrots are one of the key vegetables in the gardening/farming practices in the archipelago's of Alaska
Kodiak, Alaska, United States

Thousands of seals to be hunted — to protect fisheries
The Swedish Environmental Protection Agency has allowed for 1,500 grey seals to be hunted in the Baltic Sea and 630 harbour seals on the west coast.
Sweden

The Bering Sea’s smallest organisms are losing fat, putting larger predators at risk
Large, high-fat copepods — distantly related to shrimp and crab — are dwindling and loosing fat with the lack of sea ice from global warming.
Bering Sea

Artists fear proposed changes to Southeast Alaska sea otter hunting rules could threaten traditional craft
Only certain Alaska Native people can hunt sea otters. But as otter populations have grown, so have calls to loosen federal laws protecting them.

Hogs are running wild in the U.S.—and spreading disease
The nation's six million feral pigs are destroying crops and preying on endangered species. But the most serious threat they pose is to human health.
United States
Animals

Grain Farmer Fights Off Swan Invasion with Falcon-Shaped Kites
A farmer in South Iceland is resorting to a unique method to combat a unique threat to his grain crops. RÚV reports that Björgvín Þór Harðarson, a pig and grain farmer in Laxárdalur, is using falcon-shaped kites to scare away the whooper swans that are consuming and causing significant damage to his crops.
Iceland Review

Salmon returns set records in Bristol Bay while Southeast runs struggle
For the past 5-6 years, salmon runs all over Bristol Bay have been very strong.“This year’s record-breaking return is the result of this careful stewardship,” said executive director of United Tribes of Bristol Bay. “Our lands and waters must be protected so future generations can continue our way of life and Bristol Bay can remain the salmon stronghold for the planet.”
Koliganek, Alaska, United States
Juneau Empire

Baby boom: More Right whale babies spotted off East Coast this season
An endangered species of whale that lives off the East Coast is having its best season for new babies in several years.
Portland, Maine, United States
WMUR

If cruise ships aren't behind Ketchikan’s beach bacteria problem, what is?
For the fourth year in a row, weekly summer water quality tests show that most Ketchikan beaches have elevated levels of bacteria that could make people sick. That happened this year even without dozens of cruise ships sailing through the Inside Passage and discharging wastewater.
Ketchikan, Alaska, United States

Bocaccio rockfish recruitment event
Bocaccio rockfish have made a huge comeback in B.C. since being deemed endangered in 2013, but the success story is being met with some trepidation as trawler fishermen can’t seem to avoid netting them now.
Canada's Pacific marine ecosystems
CBC

Fish runs and berries are down, bear break-ins in Southeast Alaska are way up
Some biologists think the trend is related to the reduced hunting pressure from Outside hunters this year.
Haines, Alaska, United States

Study shows Alaska salmon are shrinking
The shrinking of chinook, sockeye, coho and chum salmon has a negative impact on the number of eggs fish lay, but smaller body sizes also mean fewer meals, fewer commercial fishing dollars and fewer nutrients transported into rivers every year.

Alaska's salmon are getting smaller, affecting people and ecosystems
The size of salmon returning to rivers in Alaska has declined dramatically over the past 60 years because they are spending fewer years at sea, according to a new study led by researchers at the University of California, Santa Cruz, and the University of Alaska Fairbanks.
Phys.Org

Wildlife shows signs its thriving amid the COVID-19 pandemic
South Africa
CGTN

Newly-discovered seaweed species threatens protected coral reefs in Pacific
Scientists have said the algae is spreading faster than anything they have seen in the remote Northwestern Hawaiian Islands.
Pearl & Hermes Atoll, Midway, US Minor Outlying Islands
Sky News

Century-old photos show effects of climate change in Rocky Mountain forests
Towering crags and peaks of the Canadian Rocky Mountains have been getting steadily greener over the past century, according to a new study.
Canadian Rocky Mountains
Vancouver Sun

Climate change leading to Arctic spider baby boom
Scientists discover Arctic wolf spiders are doubling their egg production due to warmer weather. At the Zackenberg Research Station in Greenland, the scientists observed wolf spider populations in the area between 1996 and 2014 and noticed the arachnids were laying many more eggs as the Arctic experienced warmer weather.
Zackenberg Research Station
CNET

Record number of salmon eggs found in Maine river
Atlantic salmon laid a record number of eggs in a Maine river last year, according to a conservation group that tracks the animal's status in the wild.
East Machias, Maine, United States
Houston Chronicle

Yukon reopens hunt as Fortymile caribou population booms
Reduced to just 6,500 animals in 1995, the Fortymile caribou herd in Yukon has seen a remarkable comeback, now numbering around 84,000.
Dawson City, Yukon, Canada
CBC

Grizzly bears move north in High Arctic as climate change expands range
Hunters say grizzly bears are showing up in growing numbers on islands of the Beaufort Sea.
Sachs Harbour, Northwest Territories, Canada
National Post

How climate change is triggering a chain reaction that threatens the heart of the Pacific
The fast-warming Sea of Okhotsk, wedged between Russia and Japan, is a cautionary tale of the far-reaching consequences when climate dominoes begin to fall.
Shiretoko Peninsula
Washington Post

Australia's lost shellfish reefs are roaring back to life
In just a few years, 8 million native angasi oyster hatchlings have been placed in the waters off Victoria, South Australia, Queensland and Western Australia, on the recycled mollusc shells collected from restaurants. They've turned empty, sandy seabeds into thriving ecosystems.
Port Philip Bay, Victoria, Australia
ABC News

Sea urchin explosion decimates kelp forests off Pacific coast
Similar to what has happened in B.C., tens of millions of voracious purple sea urchins have chomped their way through towering underwater kelp forests in California.
Coastal Oregon and California

What to do if your pup gets quilled by a porcupine
More porcupine sightings have been reported in Yellowknife this year compared to previous years. What should you do if your furry friend meets a porcupine?
Yellowknife, Northwest Territories, Canada

Alaska residents to see increased jellyfish sightings
The number of moon jellyfish in Alaska waters has increased. Warm ocean temperatures and plentiful food in the form of zooplankton have contributed to the increased sightings
Juneau, Alaska, United States
AP NEWS

More batty visitors in the N.W.T? Northerners on social media think so
Out of the eight species of bats in the Northwest Territories, residents are most likely to see the little brown bats.
Yellowknife, Northwest Territories, Canada

Pink Salmon smash June record
One theory is the pinks were traveling somewhere else to spawn, and taking a longer than usual route to avoid warming water.
Cold Bay, Alaska, United States
Bristol Bay Times
Alaska Media, LLC., Steve Keller designer and application developer

Swamp rats have invaded California
Somewhere between the size of a sewer rat and a beaver, with a tail resembling that of an opossum and protruding, nacho cheese-colored teeth, the nutria is both impressively unattractive and highly destructive.
Central Valley, California, United States
Los Angeles Times

The Legacy of the Blob
From California to Alaska, animals born during the infamous Blob are coming of age.
Northern California Current Ecosystem
Hakai Magazine

Unusual amount of grizzly bear sightings on Vancouver Island
Grizzly bears sightings are on the rise on Vancouver Island, and experts have a few theories as to why this is happening.
Vancouver Island, British Columbia, Canada
The Weather Network

Mexico struggles to understand, solve, seaweed invasion
Mexico has spent US$17 million to remove over a half-million tons of sargassum seaweed from its Caribbean beaches, and the problem doesn't seem likely to end any time soon.
Playa del Carmen, Quintana Roo, Mexico
CTVNews

Glowing 'Blue Tears' in China's Seas are Incredibly Toxic and Growing
The glowing algae is suffocating sea life.
Matsu Islands, Taiwan, East China Sea
Live Science

Bullhead City, Arizona Was a Retiree Paradise. Then Came a Biblical Plague of Flies.
Environmentalists often decry the loss of species diversity in rivers that have been dammed. But while some species lose when we meddle with rivers, others win, sometimes in dramatic and ways.
Bullhead City, Arizona, United States
OneZero

Nigerian fishers hit by criminals, imports and climate change
From African waters to China and back again, over half the fish on Nigerian tables is imported
Ikeja, Lagos, Nigeria
chinadialogue ocean

Why seaweed is strangling Mexican tourism, and how science could help
Sargassum is infesting Mexico’s coastline. Researchers are scrambling to stop an ecological crisis, and maybe even make something good of it.
Puerto Morelos, Quintana Roo, Mexico
MIT Technology Review

Wild pigs are a big problem. Here’s how they kill ’em in Texas
'There's nothing good about them.' They carry disease and cause billions in damage
Canada
National Post

El Niño Triggered Disease Outbreaks Across Globe
The 2015 to 2016 El Niño event brought weather conditions that triggered regional disease outbreaks throughout the world.
Tropical Pacific Ocean
Laboratory Equipment

Changing southern Gulf of St. Lawrence ecosystem
The survey started in 1971 as a review of commercially important fish like cod and halibut, but has grown into an annual scientific assessment of all sea life hauled up from the deep.
Southern Gulf of Saint Lawrence
Global News

Ecosystem changes following loss of great white sharks
A new study has documented unexpected consequences following the decline of great white sharks from an area off South Africa. The study found that the disappearance of great whites has led to the emergence of sevengill sharks, a top predator from a different habitat. A living fossil, sevengill sharks closely resemble relatives from the Jurassic period, unique for having seven gills instead of the typical five in most other sharks.
Seal Island, False Bay, South Africa
Phys.org

Saimaa seal population climbs to nearly 400
Fifty percent of Saimaa ringed seal pups born between the years of 2014-2017 entered the world in a snowdrift constructed by volunteers.
Ristiina, Southern Savonia, Finland
Yle Uutiset

Mysterious Microbes Turning Polar Ice Pink, Speeding Up Melt
Thriving communities of red algae are doing something nefarious to the world's ice sheets: melting them more quickly.
Port Charcot
National Geographic

Mysterious Microbes Turning Polar Ice Pink, Speeding Up Melt
Thriving communities of red algae are doing something nefarious to the world's ice sheets: melting them more quickly.
Greenland
National Geographic

Loads of seaweed are threatening the Caribbean’s sea life and tourism. Experts say we may be to blame
Scientists say the threat from sargassum is as serious as rising sea levels and hurricanes.
Quintana Roo, Mexico
Washington Post

Ticks are an increasing problem
Several serious diseases are in and around the Czech Republic, If you're planning on staying in Prague for any length of time, it makes sense to familiarize yourself with the healthcare options available in the city. Nothing is more important than your health!
Prague, Praha, Czech Republic
Prague TV

Aequorea (hydrozoan) bloom in the Northern California Current
Dataset from Dr. Brian Burke (NOAA; brian.burke@noaa.gov); derived from surface trawls taken during NOAA Northwest Fisheries Science Center Juvenile Salmon & Ocean Ecosystem Survey (JSOES).
Northern California Current
NOAA NWFSC CCIEA Custom Plotting

Endangered plant thrives after Sidney Spit restoration
Coastal sand ecosystem returning to health after 1.5 years of work
Sidney Spit National Marine Park, Canada
Saanich News

Crowdsourcing capelin: New website to alert biologists to locations of 'key' fish
Keeping tabs on capelin — from the shores of the Atlantic ocean to the world wide web.
Newfoundland and Labrador

How the American bullfrog is eating its way into BC
Like a horde of slimy green zombies, the incredibly invasive American bullfrog is hopping the border into the West Kootenay.
Creston Valley Wildlife Management Area, British Columbia, Canada
Nelson Star

Sargassum seaweed partly responsible for Guyana's reduced fish production
Guyana’s fish production has suffered a significant decline partly due to the adverse impact of sargassum seaweed, local and regional fishery experts said.
Demerara Waves

Sea Lice Exploded among Wild Young Salmon near BC Fish Farms
B.C salmon farms last year were besieged by sea lice, according to a new University of Toronto study, which also found a dangerously steep rise of infestation among young wild salmon who swam nearby.
Broughton Archipelago, British Columbia, Canada
The Tyee

Humboldt squid on the move
July 23, 2007 – Over the last five years, large, predatory Humboldt squid have moved north from equatorial waters and invaded the sea off Central California, where they may be decimating populations of Pacific hake, an important commercial fish.
Monterey Submarine Canyon, California, United States
MBARI

Measuring up: How meteorologists gauge the snowfall as Anchorage nears a season record
Experts use measuring sticks and tanks in regular intervals to monitor snowfall as this season’s total approaches an all-time high.
Anchorage, Alaska, United States

70,000 pink salmon caught in Norwegian rivers
“Dramatic”, says researcher Henrik H. Berntsen. The Norwegian Environment Agency has launched a major offensive to get rid of the invasive species. But, despite more fishing, there appear to be ever more humpback salmon arriving in Norwegian rivers. Currently, around 70,000 pink salmon have been caught in Norwegian watercourses this year.
Norway
SalmonBusiness

Can sunflower sea stars keep sea urchins from overfeeding on declining kelp forests?
Researchers at Oregon State University are studying the relationship between sunflower sea stars and sea urchins to determine if the reintroduction of the sea stars can help protect declining kelp forests from overgrazing by sea urchins.
Sitka, Alaska, United States

Redpolls, feisty songbirds of the Alaska winter, are flocking to feeders this season
Unusually high numbers of the chunky little finches in Southcentral are prompting surprising questions from bird lovers.
Anchorage, Alaska, United States

Bristol Bay records its largest sockeye run on record
Bristol Bay’s 2021 sockeye run is the largest on record: 63.2 million fish have returned to the bay, breaking the 2018 record of 62.9 million.
Dillingham, Alaska, United States

More shrubs means way more moose in western Alaska
Biologists want to know why there are so many moose. It may have a lot to do with shrubs — moose feast on their leaves during the spring and summer. These short woody plants are spreading west, aided by climate change, and moose populations are expanding along with them.
Bethel, Alaska, United States

The lessons for British Columbia in Alaska’s epic Bristol Bay sockeye run
Bristol Bay’s prolific salmon runs are also made possible because of the effective and transparent management of the Alaskan salmon fishery, according to both Hill and Schindler. Decisions are made in real time, on the ground — or, to be precise, overlooking the water — compared to the much more cumbersome and bureaucratic Canadian system.
Bristol Bay
The Narwhal

As beavers gain foothold in Arctic Alaska, some see benefits in how they reshape the landscape
Beavers, on the other hand, leave a mark on the landscape that you can sometimes see from space.Swarming ponds, building dams and expanding waterways, beavers are moving farther and farther into the Arctic, and are changing what the region looks like.
Ambler, Alaska, United States

More shrubs means way more moose in western Alaska
Fall moose hunts are beginning across Alaska. In western parts of the state, biologists hope that hunting pressure will help protect the health of booming populations. They also want to know why there are so many moose in the first place. It may have a lot to do with shrubs — particularly scrubby willows shooting up at the edges of open tundra. Moose feast on their leaves during the spring and summer. These short woody plants are spreading west, aided by climate change, and moose populations are expanding along with them.
Bethel, Alaska, United States

Support

Observation Template