How does rising atmospheric CO2 affect marine organisms?

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Kootenay Valley, Southern Canadian Rockies, Canada
Hallett, D.J. and Hills, L.V. 2006. Holocene vegetation dynamics, fire history, lake level and climate change in the Kootenay Valley, southeastern British Columbia, Canada. Journal of Paleolimnology 35: 351-371.

Working with a sediment profile obtained from Dog Lake, British Columbia (5046'N, 11606'W), the authors reconstructed the Holocene environmental history of Kootenay Valley in the southern Canadian Rockies, based on data related to fire frequency, drought and forest type and cover, all of which are influenced by temperature and precipitation. This effort revealed that current global warming is only just beginning to orchestrate the return of the Valley landscape back to what it was like in medieval times (AD 800-1200).