Task 1.1: Determine the impact of acidification and warming on the function of key species
Coordinated by Martin Solan, Aberdeen U
H0 Elevated CO2 x temperature will have no significant long-term impact on organism activity and function.
In benthic habitats, the activity of key organisms (often known as ecosystem engineers) can have a significant impact on the composition and functioning of ecosystems. In particular, statistical models, which attempt to predict the likely consequences of ocean acidification for ecosystem functions, such as nutrient cycling and productivity, need input algorithms describing how key biological activities (bioturbation, bioirrigation, growth, calcification and feeding) are likely to change in a high CO2 future.
In Task 1.1 we will quantify the impact of exposure (3, 6, 12 & 18 mth) to elevated CO2 x temperature on the rate and efficiency of these key biologically mediated ecosystem processes. Individuals (n = 20) of each species will be sampled from each of the long-term exposure experiments run in Aberdeen, PML, Heriot-Watt and Sweden for physiological assessment.
During the initial field collection of organisms and establishment of the exposure experiments, individuals from each species will be sampled to provide T0 data. In addition, the following mechanisms that underpin key ecological functions will be quantified.