Glacier retreat alters downstream fjord ecosystem structure and function in Greenland

Meire, L.; Paulsen, M.L.; Meire, P.; Rysgaard, S.; Hopwood, M.J.; Sejr, M.K.; Stuart-Lee, A.E.; Sabbe, K.; Stock, W.; Mortensen, J.

doi:/10.1038/s41561-023-01218-y

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Glacier retreat alters downstream fjord ecosystem structure and function in Greenland

Meire, L.; Paulsen, M.L.; Meire, P.; Rysgaard, S.; Hopwood, M.J.; Sejr, M.K.; Stuart-Lee, A.; Sabbe, K.; Stock, W.; Mortensen, J. (2023). Glacier retreat alters downstream fjord ecosystem structure and function in Greenland. Nature Geoscience 16(8): 671-674. https://dx.doi.org/10.1038/s41561-023-01218-y

In: Nature Geoscience. Nature Publishing Group: London. ISSN 1752-0894; e-ISSN 1752-0908

Available in	Authors
VLIZ: Open access 391603 [ download pdf ] NIOZ: NIOZ Open Repository 393947 [ CC BY ] [ download pdf ]

Keyword

Marine/Coastal

Author keywords

CO2 UPTAKE;MELTWATER;DISCHARGE;CARBON;RATES

Authors		Top
Meire, L. Paulsen, M.L. Meire, P. Rysgaard, S.	Hopwood, M.J. Sejr, M.K. Stuart-Lee, A.E.	Sabbe, K., more Stock, W. Mortensen, J.

Abstract

The melting of the Greenland Ice Sheet is accelerating, with glaciers shifting from marine to land termination and potential consequences for fjord ecosystems downstream. Monthly samples in 2016 in two fjords in southwest Greenland show that subglacial discharge from marine-terminating glaciers sustains high phytoplankton productivity that is dominated by diatoms and grazed by larger mesozooplankton throughout summer. In contrast, melting of land-terminating glaciers results in a fjord ecosystem dominated by bacteria, picophytoplankton and smaller zooplankton, which has only one-third of the annual productivity and half the CO₂ uptake compared to the fjord downstream from marine-terminating glaciers.

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