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UID:029009da-255f-44a3-9de3-5e78673ec014@nexttoyou
DTSTAMP:20261106T174729Z
DTSTART:20261112T233000Z
DTEND:20261113T003000Z
SUMMARY:HMSC Research Seminar: The Response of the Olympia Oyster (Ostrea 
 lurida) to Increased Alkalinity: Implications for Ocean Alkalinity Enhanc
 ement.
LOCATION:Hatfield Marine Science Center Carmen Ford Phillips Auditorium in
  the Gladys Valley Marine Studies Building\, 2030 SE Marine Science Dr\, 
 Newport\, OR 97365
DESCRIPTION:Speaker: Ben Epley\, Ph.D. Student\, College of Ocean\, Earth 
 and Atmospheric Sciences\, Oregon State University\n\nTopic: Ocean Alkali
 nity Enhancement (OAE) is a proposed marine carbon dioxide removal (mCDR)
  technique which increases the ocean’s capacity to absorb carbon dioxide 
 and simultaneously mitigates ocean acidification. While ostensibly benefi
 cial\, the effect a rapid increase in alkalinity would have on most marin
 e organisms remains poorly constrained. The Olympia Oyster (Ostrea lurida
 ) is a brooding species native to the US west coast. In previous work\, t
 he PD1 larvae have demonstrated an acute sensitivity to alkalization\, ra
 ising questions about sensitivity at subsequent life stages. We exposed a
 dult Olympia Oysters to alkalization scenarios ranging from a control (no
  alkalinity addition) to approximately double the control\, ~4000 µmol kg
 -1\, while maintaining near atmospheric CO2 equilibrium to isolate the ef
 fect of alkalinity additions on physiology. Responses were quantified wit
 h physiological rate measurements of biomineralization and respiration\, 
 shell/tissue growth\, and measurements of shell composition. We found sta
 tistically significant increases in biocalcification rate when ΩCa is gre
 ater than ~ 8\, with no observable change in respiration or growth rate. 
 However\, changes in shell Mg:Ca and proportion metabolic carbon across t
 reatment conditions are suggestive of a weakening control over biocalcifi
 cation. Finally\, we observed a notable increase in mortality rate \n\nht
 tp://next-to-u.app/events/029009da-255f-44a3-9de3-5e78673ec014
URL:http://next-to-u.app/events/029009da-255f-44a3-9de3-5e78673ec014
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