The 6th ICES/PICES Zooplankton Production Symposium "New Challenges in a Changing Ocean" is taking place this week in Bergen, Norway and ICES news will feature articles from some of the keynote speakers throughout the week. Our second installment from Ruben Escribano integrates main findings, after nearly 20 years of research on population dynamics of pelagic copepods and euphausiids from the coastal upwelling zone, along with climate-induced oceanographic variation, providing insights about mechanisms and factors controlling zooplankton production and how they can be impacted by ongoing climate change.
The impact of global warming on zooplankton in a coastal upwelling ecosystems. Increased upwelling linked to global warming rises the oxygen minimum zone, cools down the water column, causes hypoxia, lowers the pH, and generates more offshore advection. A vertically constrained habitat also reduces the extension of diel vertical migration (DVM). The potential effect is a reduction in zooplankton biomass and production, despite a projected increased in primary production and phytoplankton biomass.