Images

Biologists are checking a fyke net in the Pilgrim River for juvenile sockeye salmon to tag with archival tags.  Unfortunately none were large enough for tagging.

Bar-tailed godwit "Z0" instrumented with an implanted Argos satellite transmitter (note dorsally exposed antenna) to facilitate aerodynamics during the species non-stop flights across the Pacific Ocean.

Bar-tailed Godwit tagged Z0 near Naknek, Alaska

Biologists checking a fyke net as part of a fish project for the Norton Sound Economic Development Corporation.  Otoliths were extracted and read for ages from the fish captured in this fyke net.

Biologists checking a fyke net as part of a fish project for the Norton Sound Economic Development Corporation.  Otoliths were extracted and read for ages from the fish captured in this fyke net.

An inclined plane trap on the Kwethluk River. Biologists are capturing chum salmon juvenile smolt.

Marbled Godwit on a nest near Ugashik, Alaska.

A side channel of the Matanuska River. Results from this study were published in Curran, J.H., McTeague, M.L., Burril, S.E., and Zimmerman, C.E., 2011, Distribution, persistence, and hydrologic characteristics of salmon spawning habitats in clearwater side channels of the Matanuska River, southcentral Alaska: U.S.

An arctic fox in it's white winter phase. Taken during polar bear studies on the northern coast of Alaska.

A bearded seal on the edge of the sea ice

A polar bear with hair loss (alopecia) along its neck. The bear was captured by USGS scientists using the immobilizing drug Telazol

Black-capped Chickadee with elongated upper beak. Avian keratin disorder (AKD) is a disease characterized by debilitating beak overgrowth and other abnormalities of keratinized tissues. Affected birds have difficulty feeding and preening and may suffer high rates of mortality.

Dunlin flock near Egegik, Alaska.

Photograph of Pingok Island, Alaska, reveals physical features of a changing Arctic: collapsing bluffs, salt-killed tundra (lighter brown near the bluff edge), and drained thermokarst lakes (rust-colored depressions).

This oblique aerial photograph is of Flaxman Island off the Alaska coast and shows a tapped thermokarst lakes, caribou tracks and ice-rich bluffs that are eroding.

This photograph shows ice-wedge polygons and an eroding shoreline at Cape Halkett on the Beaufort Sea coast of Alaska. Coastal erosion along the Arctic coast is chronic, widespread and potentially accelerating, posing threats to infrastructure important for defense and energy purposes, natural shoreline habitats and nearby Native communities.

This photograph shows ice-wedge polygons and an eroding shoreline at Cape Halkett on the Beaufort Sea coast of Alaska. Coastal erosion along the Arctic coast is chronic, widespread and potentially accelerating, posing threats to infrastructure important for defense and energy purposes, natural shoreline habitats and nearby Native communities.

This photograph shows caribou tracks on ice-wedge polygons near Garry Creek in Alaska. Coastal erosion along the Arctic coast is chronic, widespread and potentially accelerating, posing threats to infrastructure important for defense and energy purposes, natural shoreline habitats and nearby Native communities.

A polar bear stands on a low-lying barrier shoal near the Huluhula River on the Beaufort Sea coast of Alaska. Coastal erosion along the Arctic coast is chronic, widespread and potentially accelerating, posing threats to infrastructure important for defense and energy purposes, natural shoreline habitats and nearby Native communities.

This photograph shows ice-wedge polygons and an eroding shoreline at Cape Halkett on the Beaufort Sea coast of Alaska. Coastal erosion along the Arctic coast is chronic, widespread, and potentially accelerating, posing threats to infrastructure important for defense and energy purposes, natural shoreline habitats, and nearby Native communities.

Unuk River is one of the transboundary watersheds of Southeast Alaska.