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Life at the Poles

How these connect

Antarctic Krill (Euphausia superba) and what it relates to. Every line is an evidence-backed relation, and the arrangement is fixed — this address draws this picture, today and next year.

governs — CCAMLR sets the krill catch limit, and its ecosystem mandate requires that limit to take account of the species that depend on krill rather than of the stock alone.depends_on — It is the only vertebrate that breeds on sea ice: the landfast ice under the colony must hold from laying in the winter dark until the chicks fledge in spring.preys_on — Emperors take krill along with fish and squid; almost every Southern Ocean vertebrate is within one or two steps of the same crustacean.depends_on — The algae live inside the brine-channel network of the ice and on its underside; without the ice as substrate the community has no habitat.constrained_by — Antarctic krill is essentially confined to the cold side of the front, which makes an oceanographic boundary the effective edge of the Southern Ocean food web.depends_on — The dependence is a life-history one rather than a preference: larval survival through the austral winter is tied to the presence and duration of the pack ice.located_in — The species is circumpolar within the Southern Ocean and is not found north of the Antarctic Polar Front in any quantity.preys_on — Krill larvae overwinter beneath the pack ice grazing the algal layer on its underside, which is why winter ice extent sets recruitment.ORG_CCAMLRORG_CCAMLRAntarctic Polar Front (Antarctic Convergence)Antarctic Polar Front (An…Sea IceSea IceREGION_SOUTHERN_OCEANREGION_SOUTHERN_OCEANAntarctic Krill (Euphausia superba)Antarctic Krill (Euphausi…Emperor Penguin (Aptenodytes forsteri)Emperor Penguin (Aptenody…Sea-ice AlgaeSea-ice Algae
7 drawn · 13 reachable and not drawn · positions derived from object ids, never from a simulation
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Every relation drawn, in words8
  1. ORG_CCAMLR · governs · Antarctic Krill (Euphausia superba)

    CCAMLR sets the krill catch limit, and its ecosystem mandate requires that limit to take account of the species that depend on krill rather than of the stock alone.

  2. Emperor Penguin (Aptenodytes forsteri) · depends_on · Sea Ice

    It is the only vertebrate that breeds on sea ice: the landfast ice under the colony must hold from laying in the winter dark until the chicks fledge in spring.

  3. Emperor Penguin (Aptenodytes forsteri) · preys_on · Antarctic Krill (Euphausia superba)

    Emperors take krill along with fish and squid; almost every Southern Ocean vertebrate is within one or two steps of the same crustacean.

  4. Sea-ice Algae · depends_on · Sea Ice

    The algae live inside the brine-channel network of the ice and on its underside; without the ice as substrate the community has no habitat.

  5. Antarctic Krill (Euphausia superba) · constrained_by · Antarctic Polar Front (Antarctic Convergence)

    Antarctic krill is essentially confined to the cold side of the front, which makes an oceanographic boundary the effective edge of the Southern Ocean food web.

  6. Antarctic Krill (Euphausia superba) · depends_on · Sea Ice

    The dependence is a life-history one rather than a preference: larval survival through the austral winter is tied to the presence and duration of the pack ice.

  7. Antarctic Krill (Euphausia superba) · located_in · REGION_SOUTHERN_OCEAN

    The species is circumpolar within the Southern Ocean and is not found north of the Antarctic Polar Front in any quantity.

  8. Antarctic Krill (Euphausia superba) · preys_on · Sea-ice Algae

    Krill larvae overwinter beneath the pack ice grazing the algal layer on its underside, which is why winter ice extent sets recruitment.