OA ORGANISM RESPONSES TO HIGH pCO2 & LOW pH 2

Question 1

What happened to survival, rate of development, growth and selective breeding in wild vs selectively bred adults of Saccostrea glomerata under high CO2?

Answer 1

• lower survival under high co2 irrespective of adult conditioning
• rate of development to umbonate larvae and eyed larvae significantly reduced high co2 and when adults were exposed
• growth significantly reduced under high co2 and with adult exposure
• selective breeding had positive carry-over effects on larvae

Question 2

adults of which CO2 level spawned larvae of Saccostrea glomerata which had higher growth, irrespective of adult source (wild vs selective)?
did larvae from wild or selectively bred oysters had higher metabolic rates?
which type of larvae were more resilient, giving them a higher capacity to acclimate or adapt to elevated co2?

Answer 2

high
selectively bred
selectively bred

Question 3

SUMMARY
anticipated levels of … … have the potential to affect a range of m…, p… and b… traits
organisms are continually exposed to … v… environmental conditions -> it is the … of change and the shifting … that is the problem
knowledge is largely based on …-term experiments; little incorporation of … or ad…; …-term effects may be different to what …-term experiments suggest
ability to … or adapt is very species specific
some organisms can r…, whilst others may even … under … CO2 conditions -> e.g. those with protective … layers or those relying on … to meet their energy demands

Answer 3

ocean acidification
morphological, physiological and behavioural
naturally variable
rate
baseline
short
acclimation
adaptation
long
short
acclimatise
resist
thrive
high
organic
photosynthesis