Skip to content
RichseenAtlas← AtlasSign in

The Halley Bay emperor colony fails and does not recover

node

The fast ice under one of the largest and apparently most stable emperor penguin colonies breaks out before the chicks can fledge, and does so again in following seasons. Numbers at the nearby Dawson-Lambton colony rise over the same period. The episode establishes two things at once: that a colony can be destroyed by a single ice season, and that emperors will relocate rather than simply die - which makes the species' prospects a question about where suitable fast ice will still exist, not only about how much.

A node is not a place. Drawing it on a map would assert something about the world that no stored fact supports.

Read in · 1

Evidence · 1
Timeline

No dated observations are stored for this object. Atlas shows what was observed and when — it does not infer a history.

Connections · 3
Assembled narrative · 1

Assembled from 35 blocks · 1 evidence · 29 related

  1. Story
  2. The fast ice under one of the largest and apparently most stable emperor penguin colonies breaks out before the chicks can fledge, and does so again in following seasons. Numbers at the nearby Dawson-Lambton colony rise over the same period. The episode establishes two things at once: that a colony can be destroyed by a single ice season, and that emperors will relocate rather than simply die - which makes the species' prospects a question about where suitable fast ice will still exist, not only about how much.
  3. Knowledge
  4. Sea Ice
  5. Emperor Penguin (Aptenodytes forsteri)
  6. Halley Bay Emperor Penguin Colony
  7. The Halley Bay emperor colony fails and does not recover
  8. Connections
  9. Halley Bay Emperor Penguin Colony
  10. Emperor Penguin (Aptenodytes forsteri)
  11. Sea Ice
  12. Sea Ice
  13. Antarctica
  14. The Halley Bay emperor colony fails and does not recover
  15. Sea Ice
  16. Antarctica
  17. Antarctic Krill (Euphausia superba)
  18. Scott reaches the South Pole and finds he is second
  19. The Halley Bay emperor colony fails and does not recover
  20. The emperor penguin is listed as threatened under the US Endangered Species Act
  21. Polynya
  22. Arctic Amplification
  23. Antarctic Krill (Euphausia superba)
  24. Polar Bear (Ursus maritimus)
  25. Emperor Penguin (Aptenodytes forsteri)
  26. Halley Bay Emperor Penguin Colony
  27. The continuous satellite sea-ice record begins
  28. A long-term decline in krill density is linked to winter sea ice
  29. The Arctic summer minimum drops far below anything previously observed
  30. The lowest Arctic sea-ice extent in the satellite record
  31. The Halley Bay emperor colony fails and does not recover
  32. The emperor penguin is listed as threatened under the US Endangered Species Act
  33. Antarctic sea ice reaches a record low, a year after the previous one
  34. Evidence
  35. Satellite imagery shows near-total breeding failure at the Halley Bay emperor penguin colony in successive seasons from 2016, following early break-out of the fast ice, with a concurrent increase in numbers at the nearby Dawson-Lambton colony consistent with relocation rather than mortality alone. V55 VERIFICATION BASIS: not opened during production; no research channel was available. Chick-loss counts and the exact sequence of seasons are not quoted anywhere in this pack for that reason.
Close the narrative
Observed changes · 0

No public Signals are attached to this object. Signals show what changed and when it was observed — never a direction or a rank.

Actions

Read the assembled narrativeContinue in StudioOpen TwinTwin does not start a decision from this kind of object.ShareSaveSaved objects are part of the authenticated projection, which is declared and not yet built.

/atlas?object=EVT_POLES_HALLEY_FAILURE_2016&experience=EVT_POLES_HALLEY_FAILURE_2016