PLEA Network

16 November 2015, Science Daily, Bird decline shows that climate change is more than just hot air. Scientists have long known that birds are feeling the heat due to climate change. However, a new study of a dozen affected species in the Western Cape suggests their decline is more complex than previously thought — and in some cases more serious. According to the study, published in Conservation Physiology, by scientists from the Percy Fitzpatrick Institute at the University of Cape Town and Nelson Mandela Metropolitan University, there could be several reasons why birds are being negatively affected by human-made climate change. They suggest that contrary to expectations the birds’ heat tolerance — or lack thereof — is not necessarily the main factor chasing species out of their preferred habitat. Other factors like changing fire and rainfall patterns, and new bird behaviour patterns could also be responsible for the decline, according to the study which includes some well-known species such as the Malachite Sunbird and the Familiar Chat. Lead researcher Susie Cunningham says a better understanding of how climate change affects bird species could help develop conservation strategies to increase chances of survival: “We know climate change is linked to changes in species’ numbers and distributions, but we don’t always know exactly how or why,” Cunningham says. “We need to figure out the factors actually driving declines before we can develop proper conservation measures to halt them.” Read More here