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Webinar: Ocean Futures Explored Using a Worldwide Suite of Ecosystem Models: how ocean acidification is more dramatic than large scale protection or dramatically altering fishing

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Wednesday, 02 May 2018, 2:00

Wednesday, May 2, 2018.  2:00 PM. Webinar: Ocean Futures Explored Using a Worldwide Suite of Ecosystem Models: how ocean acidification is more dramatic than large scale protection or dramatically altering fishing.Erik Olsen, Institute of Marine Research. Sponsored by NOAA. More information here.

Abstract: Ecosystem-based management (EBM) of the ocean considers all impacts on and uses of marine and coastal systems. In recent years, there has been a heightened interest in EBM tools that allow testing of alternative management options and help identify tradeoffs among human uses. End-to-end ecosystem modeling frameworks that consider a wide range of management options are a means to provide integrated solutions to the complex ocean management problems encountered in EBM. Here, we leverage the global advances in ecosystem modeling to explore common opportunities and challenges for ecosystem-based management, including changes in ocean acidification, spatial management, and fishing pressure across eight Atlantis (atlantis.cmar.csiro.au) end-to-end ecosystem models. These models represent marine ecosystems from the tropics to the arctic, varying in size, ecology, and management regimes, using a three-dimensional, spatially-explicit structure parametrized for each system.

Results suggest stronger impacts from ocean acidification and marine protected areas than from altering fishing pressure, both in terms of guild-level (i.e.,aggregations of similar species or groups) biomass and in terms of indicators of ecological and fishery structure. Effects of ocean acidification were typically negative (reducing biomass), while marine protected areas led to both‘winners’ and ‘losers’ at the level of particular species (or functional groups). Changing fishing pressure (doubling or halving) had smaller effects on the species guilds or ecosystem indicators than either ocean acidification or marine protected areas. Compensatory effects within guilds led to weaker average effects at the guild level than the species or group level. The impacts and tradeoffs implied by these future scenarios are highly relevant as ocean governance shifts focus from single-sector objectives (e.g., sustainable levels of individual fished stocks) to taking into account competing industrial sectors' objectives (e.g., simultaneous spatial management of energy, shipping,and fishing) while at the same time grappling with compounded impacts of global climate change (e.g., ocean acidification and warming).

About the Speaker: ErikOlsen is the head of the Demersal FishResearch Group (http://www.imr.no/forskning/faggrupper/bunnfisk/en)at the Institute of Marine Research, in Bergen, Norway, (http://www.imr.no/) wherehe has been working since 1999. Born in Sweden to Norwegian and Swedish parents who worked extensively in developing countries Erik grew up and was educated in Bergen, Norway. He studied at the University of Bergen where he received a BSc in biology (1995), MSc in fisheries biology (1997) and a PhD in fisheries biology in (2002). Since completing his PhD Erik has worked as a scientist at the Institute of Marine Research primarily on issues related to ecosystem-based monitoring, assessment and management. He has developed and lead the implementation of ecosystem surveys in the Barents Sea jointly with the Russian scientists from PINRO (http://www.pinro.ru/),as well as transferring the concepts to developing nations like Mozambique and Sudan through surveys and development program

Location  Webcast