LA in Marine Environments Flashcards
UK water temperatures
pre 1981 - Sub 10 degrees
1988-2005 - many cases well above 10 degrees
In 2400, future aragonite saturation levels will become extremely low, what does this mean?
Aragonite polymorphs are 1.5 more soluble in seawater (including corals), and therefore low saturation levels mean that they have to lay down CaCO3 faster than it is dissolving
Boyd et al, 2013 study into marine local adaptation
revealed lots of evidence on the scale of v cold (P. inermius = 5 degrees) and v warm synechoccus = 22 degrees
but findings of some maximum growth studies in the literature differed greatly, perhaps due to methodological issues opening door for further use of community wide studies
Lohbeck et al, 2012 study into Coccolithophore local adaptation
COMMON GARDEN
Experiment was to prove that that species’ capacity to calcify less (have a lower PIC/POC ratio at higher CO2) is local adaptation and not simply chemistry
2200, 1100 and 400 microatm
Local always better than foreign
export of carbon importance
Hutchins et al, 2015 = Trichodesmium study
After evolution in high CO2 - nitrogen fixation rates remained high , even after exposure to pre evoluion low CO2 conditions. Fixation rate had beenn irreversible changed - PLASTICITY CAN EVOLVE
Local adaptation to ocean acidification - Kelly et al, 2013
“Spatially varying selection may maintain necessary genetic variation for adaptation under changing pCO2 conditions
IMPORTANT: under adaptation scenario, the OA driven decrease in population is 50% smaller