[Eoas-seminar] EOAS Colloquium Friday Feb 26th 3:30pm

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Mon Feb 22 13:48:25 EST 2021

Hi Everyone,

Please join us for this week's colloquium speaker:

EOAS Seminar - Friday Feb. 26 - 3:30 pm

Speaker: Dr. Moira Decima, Assistant Professor, Scripps Institution of Oceanography

Website: https://www.moiradecima.com/

Seminar Title: The effect of salp blooms on trophic pathways and carbon export in the southwest Pacific

Abstract: The potential role of salp blooms in biogeochemistry was initially proposed 4 decades ago – their rapid population growth rates coupled with production of fast sinking pellets could lead to massive exports of carbon. Investigating this process is however complicated by the unpredictability, in time and space, of salp blooms in the world ocean. However, in the Southern Ocean, and particularly in waters surrounding New Zealand, limited evidence and anecdotal accounts indicate they are regular members of the zooplankton community, and likely play important roles in the regional food-web as well as the biological carbon pump. During this talk, I will present results from three cruises conducted in the vicinity of the Chatham Rise, east of New Zealand. Two cruises exploring spatial variability in trophic flows between winter and summer indicate substantial differences in regions where Salpa fusiformis were abundant. Results from a cruise specifically designed to investigate the effects of salp blooms on biogeochemistry, the Salp Particle expOrt and Ocean Production (SalpPOOP) voyage, indicate medium-sized blooms of the salp Salpa thompsoni have high grazing rates removing large amounts of phytoplankton, and their fecal pellet production results in ~5-fold increases in carbon export below the euphotic zone and to mesopelagic depths.

Zoom information

Michael Stukel is inviting you to a scheduled Zoom meeting.

Topic: EOAS Seminar - Moira Decima
Time: Feb 26, 2021 03:30 PM Eastern Time (US and Canada)

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