Images

Two different age classes of sand lance showing length differences and condition between fish in an age class.

Thawing ice wedges create ponds on the Arctic Coastal Plain.  The shape of these ponds influences how their water levels and nutrient concentrations change over the year.  These variables in turn influence pond ecosystems and use by waterbirds.

Table Top Mountain and the West Twin Creek catchment.

Colin and Colby use ground penetrating radar to measure the depth to ground ice in the watershed

Catch of forage fish from a trawl in Prince William Sound, Alaska. Trawling was part of detecting long-term changes in forage fish populations.

A Tufted Puffin on the water

One of two trawl winches on the  R/V Alaskan Gyre

The research vessel Alaskan Gyre is near a glacier in Prince William Sound, Alaska.

Scientist holding an Yellow Warbler on the Seward Peninsula, Alaska.  This photo is part of the Changing Arctic Ecosystems Boreal-Arctic Transition program.

Stream outflow from a lake on the Arctic Coastal Plain. Surface water connectivity affects the occupancy of fish species in lakes, influencing richness, composition, and food web complexity.

Ninespine stickleback experimental release. The addition of small-bodied ninespine stickleback to fishless thermokarst ponds provided valuable information on their ability to influence invertebrate prey. Through consumption, ninespine stickleback substantially reduced invertebrate biomass during the 6-week experiment.

Greater white-fronted geese on the Arctic Coastal Plain

Two Least Auklets sitting on rocks on Kasatochi Volcano four years after the catastrophic eruption in 2008.

A Least and Crested Auklet on Kasatochi Volcano in 2012

A Crested Auklet egg wedged between rocks on Kasatochi Volcano in 2012. They laid there eggs in crevices because of the lack of vegetation on the island due to the August 2008 catastrophic eruption.

Scientist holding an Arctic Warbler on the Seward Peninsula, Alaska.  This photo is part of the Changing Arctic Ecosystems Boreal-Arctic Transition program.

Juvenile Bluethroat on the Seward Peninsula, Alaska.  This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.

Bluethroat on the Seward Peninsula, Alaska.  This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.

A stream winding through polygonal ground on the Arctic Coastal Plain

Spectacled Eiders nest along Arctic coasts of Alaska and Russia and on the Yukon-Kuskokwim Delta in Alaska. Spectacled eiders arrive on the breeding grounds as pairs in late-May or in June. 

Researchers collect water chemistry and invertebrates from a degrading trough pond.