death of baobab trees

Some of Africa’s oldest and biggest baobab trees have abruptly died, wholly or in part, in the past decade, according to researchers.
The trees, aged between 1,100 and 2,500 years and in some cases as wide as a bus is long, may have fallen victim to climate change, the team speculated....
Further research is needed, said the team from Romania, South Africa and the United States, “to support or refute this supposition”.