Petaluma, CA--Newly published research by Petaluma-based non-profit, Point Blue Conservation Science, shows how Adélie penguins within the Ross Sea, Antarctica use sea ice in their annual migrations. The results were published in the journal Ecology , a publication of the Ecological Society of America.
Adélie penguins, though flightless, can undertake extraordinary migrations like their flying relatives, traveling thousands of kilometers out to sea from their on-land breeding colonies in Antarctica, tracking daylight and food during the long Antarctic winter. Many other species are known to use wind or ocean currents to help them save energy as they travel but, until now, relatively little has been known about if and how Adélies might use the movement of sea ice to support their travels. Understanding this interaction can provide new ecological and conservation insights, especially as long-term monitoring has revealed record low levels of sea-ice extent and concentration in Antarctica and within the Ross Sea over the last 10 years.
Point Blue has studied Adélie penguins on Ross Island, Antarctica since 1996. Recent advances in the miniaturization of electronic tags allowed researchers to track the winter movements of 87 individuals across 146 trips spanning 3 years
Point Blue’s Dennis Jongsomjit, lead author of the study noted that “Combining these new tracking tags with remotely sensed satellite data of sea-ice movement meant that we were able to investigate in greater detail than we’ve ever done before if and how Adélie penguins interacted with sea ice.”
Key results from the study included:
The study also underscores the interconnectedness of various species in the Southern Ocean, with ocean and sea ice currents influencing not just penguins but also the life history of other species they interact with, like krill, silverfish, and Antarctic toothfish.
“As climate change alters sea ice patterns,” Jongsomjit added, “it could impact the energetic costs of migration, breeding success, and population dynamics of Adélie penguins, as well as the overall ecology within one of the most pristine ecosystems on Earth.”
The paper was published in the peer-reviewed journal Ecology with the title: “Going with the floe: Sea‐ice movement affects distance and destination during Adélie penguin winter movements.” The paper can be found at: https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecy.4196 .
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About Point Blue Conservation Science:
Point Blue advances conservation of birds, other wildlife and ecosystems through science, partnerships, and outreach. Our highest priority is to reduce the impacts of habitat loss, climate change, and other environmental threats while promoting nature-based solutions for wildlife and people, on land and at sea. Visit Point Blue at www.pointblue.org .
Ecology
Observational study
Animals
Going with the floe: Sea‐ice movement affects distance and destination during Adélie penguin winter movements.
7-Jan-2024