Internal Cycle of Seminars at IMEDEA (CISI) consist on a cycle of seminar presentations given mainly by doctoral students, masters and junior postdocs, although it is not closed to other staff, such as visitors and staff, that take place every Friday from 12:00 p.m. to 12:30 p.m in the seminar room os IMEDEA.

This represents a great opportunity to learn more about the research carried out at the Institute and to bring those with less experience , the chance of increasing their presentation and public speaking skills. Afterwards, there will be coffee and some biscuits  😉 We strongly encourage you to participate. Join us!

Do you want to participate with a presentation? Please contact the organising team:

Next Seminars

Seminarios destacados
31/01/2025
Internal Cycle of Seminars IMEDEA - Laia Illa - «Pushing the limits: Thermotolerance experiment on rhodoliths.»
Abstract In the Western Mediterranean Sea, vast extensions of rhodolith beds hold significant ecological value. These habitats are composed of free-living species of red coralline algae which are ecosystem engineers. The calcareous composition of rhodolith species makes them susceptible to climate change impacts, mainly to seawater acidification. Mediterranean rhodolith beds are multispecific habitats found from 60 up to 100 m below the surface, a deeper distribution that likely provides a more stable environment with fewer fluctuations in warming. However, there are gaps of knowledge on the responses of this multi-specific habitat to different disturbances. In this regard, we have focused on untangle the performance of two genera of rhodoliths along a thermal gradient, specifically of Lithothamium spp. and Phymatholiton spp.. Measurements of dissolved oxygen and total alkalinity during the experiment allowed the calculation of metabolic rates. The thermal patterns and optimal temperatures for metabolic rates displayed by both genera were similar. These genera inhabit areas with mean yearly temperatures of 15°C and little temperature variation. However, both genera seem to be acclimated to a warmer range of temperature. Our findings suggest that Mediterranean rhodoliths genera are likely to cope with ocean warming.  Link to the video here

Previous Seminars

Internal Cycle of Seminars IMEDEA - Ana Laura Delgado - «Patterns and Trends in Chlorophyll-a Concentration and Phytoplankton Phenology in the Biogeographical Regions of Southwestern Atlantic.»

06/06/2024

Abstract

The Southwestern Atlantic Ocean (SWA), is considered one of the most productive areas of the world, with a high abundance of ecologically and economically important fish species. Yet, the biological responses of this complex region to climate variability are still uncertain. Using 24 years of satellite-derived Chl-a data, the SWA was classified into 9 spatially coherent regions based on the temporal variability of Chl-a concentration, as revealed by SOM (Self-Organizing Maps) analysis. These biogeographical regions were the basis of a regional trend analysis in phytoplankton biomass, phenological indices, and environmental forcing variations. A general positive trend in phytoplankton concentration was observed, especially in the highly productive areas of the northern shelf-break, where phytoplankton biomass has increased at a rate of up to 0.42 ± 0.04 mg m −3 per decade. Significant positive trends in sea surface temperature were observed in 4 of the 9 regions (0.08–0.26 °C decade −1) and shoaling of the mixing layer depth in 5 of the 9 regions (−1.50 to −3.36 m decade −1). In addition to the generally positive trend in Chl-a, the most conspicuous change in the phytoplankton temporal patterns in the SWA is a delay in the autumn bloom (between 15 ± 3 and 24 ± 6 days decade −1, depending on the region). The observed variations in phytoplankton phenology could be attributed to climate-induced ocean warming and extended stratification period. The provided results further evidence of the impact of climate change on these highly productive waters.