How geraniums are sending a climate change distress signal to the Cape

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South Africa Headlines News

Geraniums in the Western Cape are blooming nearly 12 days earlier than they did a century ago due to climate change.

The plants — more correctly known as pelargoniums — are at the centre of a new data-gathering and number-crunching exercise which combed through 108 years of records from weather stations and herbariums., are that a temperature increase more than three times the global average is the reason pelargoniums flowered 11.6 days earlier in 2009 than they did in 1901.Climate Change Ecology

“Projections focused on the fynbos biomes ... showed that if temperatures warm 2.3°C above pre-industrial levels by 2050, habitat loss could reach 51-65% [and] 23% of the species in this region are projected to go extinct. To do so, they combined records from more than 6,200 herbarium specimens of pelargoniums with historical temperature data from more than 460 weather stations in the 91,000km² Cape region.

“These environmental changes coupled with other threats, such as urban development and invasive species, will exacerbate droughts, water availability, growing-season lengths, plant activity and ecosystem productivity, and impact food and other ecological systems.”

 

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