In drought-stricken California, workers in industries from golf to medical marijuana are struggling to prevent the lack of water from drying up business. Most are cautiously watching the weather in hopes that fall and winter storms bring enough rain and snow to keep their doors open. But for some companies, the persistent lack of moisture has been too much: They’ve already been forced to close.
Archive for September, 2014
Images of lions, giraffes, wildebeests and other creatures depicted on ancient Egyptian artifacts have helped scientists create a 6,000-year record of local mammal extinctions, according to a new study. Several of the extinction episodes correlate with known periods of drought and rapid human population growth.
While the correlations aren’t proof that drought and population pressures caused the animals to disappear, “it is an interesting pattern,” Justin Yeakel, a biologist at the Santa Fe Institute in New Mexico, told NBC News. What’s more, he added, “as the communities lost species, the system became more unstable and this was largely due to the loss of redundancy in the system.”
In other words, when an herbivore went locally extinct several thousand years ago, it wasn’t a big deal because there were plenty of other herbivores around for the carnivores to eat. Now, there are so few of any mammals left, that the loss of any one species has a larger impact on those that remain.