By 2100, the protozoa will have spread almost 300 kilometers closer to the poles
Using the data from biogeographic terrain analyses, the researchers developed a species distribution model for calculating where Amphisteginid foraminifera occur under certain environmental conditions. Based on climate models, the researchers then forecast the future range of these calcareous shell protozoa. "Amphistegina are among those profiting from the rising temperatures as a result of climate change," summarizes Prof. Langer. According to the models, the calcareous protozoa will spread 180 km (or 1.6 degrees of latitude) closer to the poles through the warming oceans by 2050. By 2100, average ocean temperatures will increase by about 2.5 degrees Celsius according to conservative estimates. Accordingly, Amphisteginid foraminifera will progress another almost 300 kilometers about 2.5 degrees of latitude closer to the poles.
Ocean acidification - survival of the fittest
"Our models are forecasting rates of spread of up to eight kilometers per year," says doctoral student Anna Weinmann from the Steinmann-Institut at the University of Bonn. Corals can spread into new territories at similarly high rates. They do, however, have problems with the acidification of the oceans that accompanies the increasing carbon dioxide rate in the atmosphere. The skeletons of corals consist of aragonite and are thus much more sensitive to acids than the fora-minifera's calcite shel
|Contact: Martin R. Langer|
University of Bonn