British admirality charts from 1858 to 1956 have helped Prof. Maycira Costa and her team map kelp distribution in the first historical digital map of B.C.'s coastal kelp forests
An example of a British chart from the 1850s showing the drawing of kelp blades to indicate kelp beds.A serendipitous meeting between a professor and a colleague last year led to a treasure trove of historical maps indicating kelp bed locations off British Columbia’s coast, helping experts understand the changes in the ocean’s rainforests.
Using those British admiralty charts from 1858 to 1956, Costa and her research team have now created the first historical digital map of B.C.’s coastal kelp forests. The province has two types of kelp forests, bull and giant. They grow from shallow areas to depths of about 20 to 25 metres, Costa said.
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