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Salcha River sonar near Salchaket
Salcha River sonar near Salchaket
Salcha River sonar near Salchaket
A field of peatland surrounded by spruce and other understory plants in Alaska. Mountains can be seen in the background.
Thawing Peatlands, Alaska
Thawing Peatlands, Alaska
Thawing Peatlands, Alaska

Cores were collected from various areas of thawing permafrost-peatlands in Alaska. Permafrost thaw results in ground subsidence and inundation that kills black spruce and other understory plants living on the permafrost plateau. 

Cores were collected from various areas of thawing permafrost-peatlands in Alaska. Permafrost thaw results in ground subsidence and inundation that kills black spruce and other understory plants living on the permafrost plateau. 

Black-legged Kittiwakes sitting on the side of a rock wall in Cook Inlet, Alaska
Black-legged Kittiwakes in a colony in Cook Inlet, Alaska
Black-legged Kittiwakes in a colony in Cook Inlet, Alaska
Black-legged Kittiwakes in a colony in Cook Inlet, Alaska

Black-legged Kittiwakes in a colony in Cook Inlet, Alaska. One bird on a nest.

A lot of small fish from a fyke net set near Kaktovik, AK.  Biologists sort through them.
The catch from a fyke net set near Kaktovik, Alaska
The catch from a fyke net set near Kaktovik, Alaska
The catch from a fyke net set near Kaktovik, Alaska

Biologists identify species, count, measure length, and release thousands of fish each year to understand how fish use nearshore habitats.

Biologists identify species, count, measure length, and release thousands of fish each year to understand how fish use nearshore habitats.

Underwater view of fish inside a fyke net
Underwater image of fish captured by a fyke net
Underwater image of fish captured by a fyke net
Underwater image of fish captured by a fyke net

An underwater image of fish captured by a fyke net near Kaktovik, Alaska, Beaufort Sea, USA. The small silver fish with dark backs are young-of-year (age-0) Arctic cisco (Coregonus autumnalis) and the flatfish are Arctic flounder (Liopsetta glacialis).

An underwater image of fish captured by a fyke net near Kaktovik, Alaska, Beaufort Sea, USA. The small silver fish with dark backs are young-of-year (age-0) Arctic cisco (Coregonus autumnalis) and the flatfish are Arctic flounder (Liopsetta glacialis).

A fish trap set in the ocean along the shore near Kaktovik, AK
A fyke net set to catch nearshore fish near Kaktovik, Alaska
A fyke net set to catch nearshore fish near Kaktovik, Alaska
A fyke net set to catch nearshore fish near Kaktovik, Alaska

A fyke net or fish trap used for continuous sampling of nearshore fish in shallow waters. Fish swimming along the beach are stopped by a small-mesh net that guides them in to one of these two underwater fish traps that are set side by side. Researchers visit nets at least once a day to identify, count, and release fish.

A fyke net or fish trap used for continuous sampling of nearshore fish in shallow waters. Fish swimming along the beach are stopped by a small-mesh net that guides them in to one of these two underwater fish traps that are set side by side. Researchers visit nets at least once a day to identify, count, and release fish.

A small arctic grayling near the bottom of the Imelyak River
Small arctic grayling in the Imelyak River, Brooks Range
Small arctic grayling in the Imelyak River, Brooks Range
Small arctic grayling in the Imelyak River, Brooks Range

Small arctic grayling hugging the bottom in the Imelyak River in the Brooks Range. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.

Small arctic grayling hugging the bottom in the Imelyak River in the Brooks Range. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.

Scientist walking up the Imelyak River
Sampling the Imelyak River in the Brooks Range
Sampling the Imelyak River in the Brooks Range
Sampling the Imelyak River in the Brooks Range

Sampling the Imelyak River in the Boreal-Arctic transition of the Brooks Range in Noatak National Park and Preserve, Kobuk Valley National Park. This is part of the Hydro-Ecology of Arctic Thawing (HEAT) project.

Sampling the Imelyak River in the Boreal-Arctic transition of the Brooks Range in Noatak National Park and Preserve, Kobuk Valley National Park. This is part of the Hydro-Ecology of Arctic Thawing (HEAT) project.

Young of year Arctic cisco
Young of year Arctic cisco
Young of year Arctic cisco
Young of year Arctic cisco

Young of year Arctic cisco (Coregonus autumnalis).

Flock of birds over Arey Island near Kaktovik on the coastline of the Beaufort Sea
Beaufort Sea coastline on Arey Island with flock of birds
Beaufort Sea coastline on Arey Island with flock of birds
Beaufort Sea coastline on Arey Island with flock of birds

Flock of birds over Arey Island near Kaktovik on the coastline of the Beaufort Sea.

Fyke net set in Kaktovik Lagoon with the town of Kaktovik, Alaska in the background
Fyke net set in Kaktovik Lagoon with Kaktovik, AK in the background
Fyke net set in Kaktovik Lagoon with Kaktovik, AK in the background
Scientist walking up the Akilik River with a minnow trap to catch fish
Akilik River stream sampling
Akilik River stream sampling
Akilik River stream sampling

Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.

Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.

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