---Previous studies that attempted to explain why the shifts were occurring at different rates and in different directions than expected did not have the data necessary to study changes in detail. By looking at the larger data sets, researchers working on this study could examine individual species and groups of species within a geographic region, the temperature range inhabited by each species or species group, and the impact of temperature changes over time. By determining the preferred temperature for each species, where the preferred temperatures moved, and then where the species had moved, the researchers found that many of the species matched those shifts over time in what they called “the complex mosaic of local climate velocities.” Atlantic cod are another cold-water species that may be migrating to escape warmer water, NOAA says. Atlantic cod are another cold-water species that may be migrating to escape warmer water, NOAA says. Across all taxa, 74 percent shifted latitude in the same direction as climate velocity, and 70 percent shifted depth in the same direction. Likewise, 73 percent of shifts to lower latitudes and 75 percent of shifts to shallower water were explained by climate velocity. Local variations in the environment appear to be a much more accurate predictor of species shifts than variations in the species life histories and other factors. - See more at: netnewsledger/2013/09/16/climate-change-shifting-marine-species-noaa/#sthash.lnt3I4WE.dpuf
Posted on: Tue, 17 Sep 2013 00:05:07 +0000
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