Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8168
Authors: | Tedesco, L.* Vichi, M.* Thomas, D.* |
Title: | Process studies on the ecological coupling between sea ice algae and phytoplankton | Journal: | Ecological modelling | Series/Report no.: | /226(2012) | Publisher: | Elsevier Science Limited | Issue Date: | 2012 | DOI: | 10.1016/j.ecolmodel.2011.11.011 | Keywords: | Sea ice ; Ecosystem modelling; Acclimation; Adaptation; Seeding; Climate change |
Subject Classification: | 02. Cryosphere::02.01. Permafrost::02.01.02. Cryobiology 02. Cryosphere::02.04. Sea ice::02.04.99. General or miscellaneous 03. Hydrosphere::03.01. General::03.01.01. Analytical and numerical modeling 03. Hydrosphere::03.01. General::03.01.07. Physical and biogeochemical interactions 03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cycles |
Abstract: | The seasonal dynamics of pelagic and sea ice communities are closely related in ice-covered waters, however, modelling works that analyse such interactions are scarce. We use the Biogeochemical Flux Model in Sea Ice (BFM-SI) coupled to the pelagic Biogeochemical Flux Model (BFM) in a study area in Greenland to quantitatively investigate: (1) the significance of photoacclimation/photoadaptation strategies of autotrophs, (2) the fate of the sea ice biomass in case of algae seeding, algae aggregation and at different mixed layer depths and (3) the changes in community production under a climate change scenario. The results show that sea ice algae need to be both photoacclimated and photoadapted to the sea ice environment in order to grow, while phytoplankton may adopt different strategies for optimising their growth. The seeding of the phytoplankton bloom shows to be driven, both in timing and magnitude, by the viability of sea ice algae and by the degree of aggregation of algae released from the ice, which also affects the sinking rate to the sea floor. Under a mild climate change scenario (SRES B2, 2071–2090) the sea ice community is projected to be generally more productive, whereas phytoplankton growth will be reduced because the melt of sea ice will occur earlier in the season when light is less favourable to sustain the growth. While it is generally anticipated that the melting of multi-year ice in the Arctic Ocean will cause an increase in marine production, this study shows that seasonal ice-covered seas in the Northern hemisphere may actually be less productive and may shift to more oligotrophic conditions within the next 100 years. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Tedesco12.pdf | Published paper | 1.43 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
20
32
checked on Feb 10, 2021
Page view(s) 5
458
checked on Mar 16, 2024
Download(s) 50
113
checked on Mar 16, 2024