February 1st to 5th 2016
Olhão, Portugal
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Stress response to El nino conditions in giant kelp

Scientific Exhibition
Future Oceans
Wednesday, February 3, 2016 -
18:30 to 20:00

Barreto, L. 1 Ladah, L. 2 Pearson, G.A. 3 Serrão, E.A. 4 Zertuche, J. 5 Reed, D.C. 6

1University of Algarve
2Department of Biological Oceanography, CICESE
3CCMAR, CIMAR-Laboratório Associado, University of Algarve
4CCMAR, CIMAR-Laboratório Associado, University of Algarve
5Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California
6Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal

The study of marine foundation species is a crucial step in order to understand how climate alterations will affect the entire ecosystem. Here we test the effect of increase water temperature and reduction of nutrients on a foundation species Macrocystis pyrifera combining a photosynthesis indicator (Fluorometer) and gene expression within four populations from the Northeast Pacific and two depths (surface and bottom). Five blades from each population and depth were place at three temperatures (15, 20 and 24ºC) and with and without nutrient (three replicates per treatment) for 72h. Our results show that top blades and south populations are less able to cope to stress conditions.
keywords: 
Macrocystis pyrifera, climate change, photosynthesis, ecophysiology

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