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- W2070542818 abstract "Global climate change is expected to modify the spatial distribution of marine organisms.However, projections of future changes should be based on robust information on the ecologicalniche of species. This paper presents a macroecological study of the environmental tolerance andecological niche (sensu Hutchinson 1957, i.e. the field of tolerance of a species to the principal factorsof its environment) of Calanus finmarchicus and C. helgolandicus in the North Atlantic Ocean andadjacent seas. Biological data were collected by the Continuous Plankton Recorder (CPR) Survey,which samples plankton in the North Atlantic and adjacent seas at a standard depth of 7 m. Elevenparameters were chosen including bathymetry, temperature, salinity, nutrients, mixed-layer depthand an index of turbulence compiled from wind data and chlorophyll a concentrations (used hereinas an index of available food). The environmental window and the optimum level were determinedfor both species and for each abiotic factor and chlorophyll concentration. The most important parametersthat influenced abundance and spatial distribution were temperature and its correlates suchas oxygen and nutrients. Bathymetry and other water-column-related parameters also played animportant role. The ecological niche of C. finmarchicus was larger than that of C. helgolandicus andboth niches were significantly separated. Our results have important implications in the context ofglobal climate change. As temperature (and to some extent stratification) is predicted to continue torise in the North Atlantic sector, changes in the spatial distribution of these 2 Calanus species can beexpected. Application of this approach to the 1980s North Sea regime shift provides evidence thatchanges in sea temperature alone could have triggered the substantial and rapid changes identifiedin the dynamic regimes of these ecosystems. C. finmarchicus appears to be a good indicator of theAtlantic Polar Biome (mainly the Atlantic Subarctic and Arctic provinces) while C. helgolandicus isan indicator of more temperate waters (Atlantic Westerly Winds Biome) in regions characterised bymore pronounced spatial changes in bathymetry." @default.
- W2070542818 created "2016-06-24" @default.
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- W2070542818 date "2007-09-13" @default.
- W2070542818 modified "2023-10-17" @default.
- W2070542818 title "Macroecology of Calanus finmarchicus and C. helgolandicus in the North Atlantic Ocean and adjacent seas" @default.
- W2070542818 doi "https://doi.org/10.3354/meps06775" @default.
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