Wednesday, 24 August 2011

Peer-review Paper - Poleward Plant Progression Propaganda Pummeled

Image: CSIRO
Poloczanska, E.S., Smith, S., Fauconnet, L., Healy, J., Tibbetts, I.R., Burrows, M.T. and Richardson, A.J. 2011. Little change in the distribution of rocky shore faunal communities on the Australian east coast after 50 years of rapid warming. Journal of Experimental Marine Biology and Ecology 400: 145-154. 

Seabra, R., Wethey, D.S., Santos, A.M. and Lima, F.P. 2011. Side matters: Microhabitat influence on intertidal heat stress over a large geographical scale. Journal of Experimental Marine Biology and Ecology 400: 200-208.

As the Idso's CO2 Science website  explains:
One of the main tenets of global warming orthodoxy is that as temperatures around the world rise, both terrestrial and aquatic plants and animals will be forced to migrate to cooler parts of the planet in order to avoid extinction, which for marine organisms can mean only that they must move poleward in latitude.
The authors had a fresh look at the surveys of marine fauna that had been conducted in the 1940s and 50s at 22 rocky shores sites located between 23 and 35ºS latitude.
Poloczanska et al. report that of the 37 species they encountered that had distributional data available from both time periods, "only six species showed poleward shifts consistent with predictions of global climate change." Four others actually moved in the opposite direction "inconsistent with expectations under climate change," while the rest "showed no significant changes in range edges."

The authors stated that it was the effect of wave exposure, local currents and the presence of large sand islands - and "not temperature.." that is the "primary factor influencing biogeographical distribution" along Australia's East Coast.

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