The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations
| Autor: | Kajsa Tönnesson, Marie Maar, Eva Friis Møller, Sigrun Jonasdottir, Torkel Gissel Nielsen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Ecology 010604 marine biology & hydrobiology Calanus finmarchicus Clupea Haddock Aquatic Science Biology Oceanography biology.organism_classification 01 natural sciences Zooplankton Herring 13. Climate action Calanus Gadus 14. Life underwater Copepod 0105 earth and related environmental sciences |
| Zdroj: | Limnology and oceanography (0024-3590) (ASLO), 2012, Vol. 57, N. 1, P. 211-220 Møller, E F, Maar, M, Jónasdóttir, S H, Nielsen, T G & Tönnesson, K 2012, ' The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations ', Limnology and Oceanography, vol. 57, no. 1, pp. 211-220 . https://doi.org/10.4319/lo.2012.57.1.0211 |
| DOI: | 10.4319/lo.2012.57.1.0211 |
| Popis: | We studied the response in development times of Calanus finmarchicus and Calanus helgolandicus to changes in temperature and food conditions. Grazing experiments were performed at different temperatures for both species, and the results were implemented in a stage-resolved zooplankton population model that predicted development times from biomass increments controlled by ingestion and metabolic losses. Predictions were validated against development data from the literature, and show that C. finmarchicus develops faster than C. helgolandicus below 11uC and slower above. The different relative development rates of the species are related to different temperature responses in ingestion rates. A temperature increase of 1u Ct o 2uC may have consequences for the relative contribution of C. helgolandicus and C. finmarchicus to the copepod community, and both seasonal and spatial displacements of the Calanus populations can be expected under climate change. Copepods of the genus Calanus are key species in the North Atlantic Ocean. They are central for the trophodynamics of the system, and a change in abundance is likely to influence food web dynamics, energy transfer efficiency, and the biological carbon pump (Hirche and Kosobokova 2007; Beaugrand 2009; Falk-Petersen et al. 2009). Calanus has been shown to be a crucial prey for fish species such as cod (Gadus morhua), haddock (Melanogrammus aeglefinus), herring (Clupea harengus), and mackerel (Scomber scombrus) (Gaard and Reinert 2002; Gislason and Astthorsson 2002; Ringuette et al. 2002), as well as for marine birds and marine mammals (Laidre et al. 2007; Karnovsky et al. 2003). Four Calanus species exist in the North Atlantic. Calanus glacialis and Calanus hyberboreus dominate in Arctic waters, while Calanus finmarchicus has its center in the North Atlantic and Calanus helgolandicus prevails farther south (Beaugrand et al. 2002; Bonnet et al. 2005; Falk-Petersen et al. 2009). Here we consider the latter two species, their responses in feeding and development time to changing temperature and food conditions, and how this may affect the competition between them. In the North Atlantic, occurrence of cod has been shown to be associated with high abundances of C. finmarchicus (Beaugrand and Kirby 2010). In the North Sea, a shift in the spatial distribution of C. finmarchicus and C. helgolandicus is |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|