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Weddell Sea benthic communities under the influence of different ice

regimes

S. Pineda-Metz O. Kuvshinova

D. Gerdes

(2)

Arndt, J.E. et al. 2013

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Aims

• To show benthos distribution patterns in the Weddell Sea, and

• How these patterns relate to sea ice regimes

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Benthos

(5)

Sea Ice

(6)

Ice & Benthos

• Ice disturbes benthos

– Limits sea surface for production

– Sea ice modifies water characteristics

(7)

Summer sea ice coverage

(8)

Winter sea ice coverage

(9)

Questions

• How is benthos distributed in the Weddell Sea?

• Are there any differences along the shelf?

• How important is the role of sea ice?

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(11)

Stations

TIP OF THE PENINSULA

LARSEN

FILCHNER

EASTERN SHELF

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Abundance

2767 ind.m-2

682 ind.m-2

1650 ind.m-2

2535 ind.m-2

(13)

Biomass

446 g ww.m-2

78 g ww.m-2

71 g ww.m-2

3944 g ww.m-2

(14)

Production

6.4 C.y-1.m-2

1.6 C.y-1.m-2

10.3 C.y-1.m-2

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CLITELLATES AMPHIPODS

SPONGES OPHIUROIDS POLYCHAETES Abundance Biomass &

production

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Summer average sea ice coverage

Rho: 0.28 – 0.38

(17)

Conclusions

• Heterogeneous distribution pattern…

Higher values at the “extremes”

All areas differ

• Sea ice coverage plays a role, but not key

(18)

Acknowledgements

• Crew of R/V Polarstern

• POLMAR & LMH

• Bentho pelagic-processes section (AWI)

(19)

Thank you

Referenzen

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