OA lecture 4- Jasmine

Question 1

List other drivers of change also impacting marine organisms (Not just OA)

Answer 1

pollution
OA
Species invasion
habitat loss
warming
fishing intensity
hypoxia

Question 2

impacts of warming- Starfish?

Answer 2

feeding and growth rates increase, calcification surpressed slightly

Question 3

A study found that Combined effects of CO2, warming & invasive species of marine species

Answer 3

found a lower growth rate at high CO2 and temp

Question 4

what should be considered when referring to lab based simuilation of conditions?

Answer 4

• long term affects
• seaonal variation
• interspecies interaction
• combined impacts with other factors- ie. hypoxia
• changes in both macrofaunal and macronutrient diverstiy

Question 5

Ocean acidification is occurring at the same time as a multitude of other stressors including warming, eutrophication, habitat destruction…what does this mean?

Answer 5

global changes interact to affect marine organisms and ecosystems

Question 6

response to change could be what?

Answer 6

synergistic,
neutral or
antagonistic
depending on the species or the physiological processes involved.

Question 7

which stressors may outweigh OA? and why?

Answer 7

The effects of additional stressors (warming, hypoxia) may outweigh the effects of ocean acidification and depend on seasonal timing