Details

Autor(en) / Beteiligte

• Smolina, Irina
• Kollias, Spyros
• Møller, Eva F.
• Lindeque, Penelope
• Sundaram, Arvind Y. M.
• Fernandes, Jorge M. O.
• Hoarau, Galice

Titel

Contrasting transcriptome response to thermal stress in two key zooplankton species, Calanus finmarchicus and C. glacialis

Ist Teil von

• Marine ecology. Progress series (Halstenbek), 2015-08, Vol.534, p.79-93

Ort / Verlag

Inter-Research

Erscheinungsjahr

2015

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Climate change has already led to the range expansion of warm-water plankton assemblages in the northeast Atlantic and the corresponding range contraction of colder-water species. The temperate copepod Calanus finmarchicus is predicted to shift farther northward into polar waters traditionally dominated by the arctic copepod C. glacialis. To identify temperature-mediated changes in gene expression that may be critical for the thermal acclimation and resilience of the 2 Calanus spp., we conducted a whole transcriptome profiling using RNA-seq on an Ion Torrent platform. Transcriptome responses of C. finmarchicus and C. glacialis from Disko Bay, west Greenland, were investigated under realistic thermal stresses (at + 5, +10 and +15°C) for 4 h and 6 d. C. finmarchicus showed a strong response to temperature and duration of stress, involving up-regulation of genes related to protein folding, transcription, translation and metabolism. In sharp contrast, C. glacialis displayed only low-magnitude changes in gene expression in response to temperature and duration of stress. Differences in the thermal responses of the 2 species, particularly the lack of thermal stress response in C. glacialis, are in line with laboratory and field observations and suggest a vulnerability of C. glacialis to climate change.