When: Monday 30th Mai 2022: 09:15-10:45
Where: Store auditorium Høyteknologisenteret (HIB), Marineholmen
Visitors from Scripps Institution of Oceanography (SIO) and State University New York (SUNY) will give guest seminars at the Department of Biological Sciences.
The visitors Lisa Levin (SIO) and Karin Limburg (SUNY) are collaborators on the HypOnFjordFish project: https://hyponfjordfish.w.uib.no/
09:15: Professor Lisa Levin (SIO): Deep-Sea Biodiversity Challenges in the 21st century: Climate, Resource Extraction and Sustainability
Abstract: As the human population continues to grow, pressures on the deep ocean from climate change and resource extraction are inextricably rising, creating a serious situation in our planet’s greatest frontier. This presentation will discuss the science of climate change in deep ocean environments, industrialization of the deep sea, deep ecosystem responses and effects on ecosystem services. It will consider the governance challenges these present, possible solutions and how scientific networks such as the Deep Ocean Stewardship Initiative (DOSI) and the Deep Ocean Observing Strategy (DOOS) can help address these.
Lisa’s web page: https://llevin.scrippsprofiles.ucsd.edu/
10:00: Professor Karin Limburg (SUNY): Through the Heads of Fishes: Anthropogenic Impacts on Fishes Revealed by Otolith Chemistry
Abstract: Fishes are increasingly subject to the accelerating, intensifying pressures of human activities, from direct alterations of habitat to climate change. As fishery biologists, we have our various “windows” through which we peer into fish population ecology: genetics, tracking, modeling, etc. Here I’ll discuss the insights that emerge from studying fish otolith chemistry. Otoliths are interesting biominerals because they are composed of aragonite (CaCO3) precipitated on a complex scaffolding of proteins, and as such, various trace elements and isotopes can become incorporated in both materials. Although we surely do not understand all the mechanisms driving incorporation, new insights are continually gained. The rich chemical detail that can be collected over individual fishes’ lives is time-stamped by the chronometric properties of otoliths. Thus, details of life histories are beginning to emerge that allow us greater interpretation of stresses. I will present a few case studies that illustrate how we can use otolith chemistry to understand the impacts of the Anthropocene: ocean deoxygenation; damming large rivers; and possible proxies of metabolism that can track lifetime condition. I’ll conclude with a few thoughts about future directions.
Karin’s web page: https://sites.google.com/esf.edu/k-limburg-site/home