Map: Ocean warming could push marine species beyond their limits – Carbon Brief

How a warming ocean affects marine animals is about more than how high temperatures get. It also matters whether or not fish and other creatures can tolerate that change, a new study says.

The map below, published in a new paper in Nature, identifies which present-day habitats are likely to warm in excess of what shallow-water fish and invertebrates can cope with.

The study considers almost 4,000 different species in habitats around the world. The map colours indicate the proportion of existing species that are expected to be pushed beyond their limits by 2025 (upper map) and 2115 (lower map) under a high emissions scenario.

The dark blue shading illustrates where conditions will get too warm for only 10% of species. At the other end of the scale, regions with red shading are likely to exceed the tolerance of 100% of species. For the 2115 map, the red shading covers a third of all the regions analysed in the study.

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