African Wild Dogs Can’t Take The Heat, Face Extinction From Climate Change

By Christie Wilcox | July 20, 2017 2:27 pm
New study suggests African wild dogs may be doomed by climate change. Photo by Mathias Appel

New study suggests African wild dogs may be doomed by climate change. Photo by Mathias Appel

Things aren’t looking good for Africa’s iconic wildlife. Already, many species are threatened by human activities and habitat loss. Even species once thought to be resilient, like giraffes, are suddenly struggling. Just earlier this week, scientists reported that aardvarks, one of sub-saharan Africa’s most successful and adorable insect-eaters and essential ecosystem engineers—face severe declines and even extinction as rising temperatures and declining rainfall dry out the continent. Now, a new paper in the Journal of Animal Ecology adds African wild dogs to the growing list of species that may be eradicated by our changing climate.

African wild dogs (Lycaon pictus) are already endangered, largely due to habitat loss, direct conflict with humans, and infectious disease. Also called ‘painted’ dogs for their stunning, multi-colored coats, these distant relatives of our beloved pets live in packs of 10 to more than 40 animals that work together to hunt down prey species like gazelle and impala. In fact, what is known about their biology and ecology suggests that they should be rather impervious to the kinds of changes expected to occur as our planet warms. Other than their relatively low numbers, African wild dogs don’t exhibit traits often associated with susceptibility to climate change; they exist in diverse habitats, inhabit more than a million square kilometers over a broad geographic range, and aren’t particularly picky eaters. And with their ability to pump out pups quickly, they’re readily able to return to areas where they once roamed, so long as we don’t interfere (unfortunately, we often do).

So when scientists from the Zoological Society of London in conjunction with the University of Johannesburg and Botswana Predator Conservation Trust explored the associations between weather and the wild dogs’ reproductive success, it was somewhat surprising that the animals were sensitive to climate change. The team used data gathered by long term monitoring sites in Botswana, Kenya, and Zimbabwe to examine correlations between weather patterns like ambient temperature and rainfall with the dogs’ hunting activities and successful pup production. They found that hot weather led to a reduction in hunting as well as fewer pups being born and surviving each year.

Hotter temperatures mean fewer of these sweet faces every year.
Photo shared on Instagram by Grant Marcus (@grant_marcus)

The scientists were not able to conclusively demonstrate whether the reduction in hunting is to blame for the reduction in reproductive success, though it seems intuitive that less food means less to go around, especially to pups, potentially leading to starvation. Dogs with dwindling energy reserves may also hunt when they otherwise wouldn’t, leaving their young vulnerable to predators, and hungry animals may become desperate and take greater risks for their meals, increasing their own chances of mortality. Or, higher temperatures might have more direct impacts on the animals unrelated to their hunting success. Higher temperatures have been shown to reduce milk output and quality in other species.

An African wild dog pack in Kruger National Park, South Africa. Photo by Bart Swanson

An African wild dog pack in Kruger National Park, South Africa. Photo by Bart Swanson

Sadly, there doesn’t seem much reason for hope that these beautiful creatures will find a way to adapt to rising temperatures. There aren’t really any cooler areas at higher latitudes or altitudes for them to flee to, as our species already booted them out of such habitats. They aren’t able to switch over to hunting during dark, cooler hours because they need to see to coordinate their attacks, making moonlight a constraining factor. And they already have their pupping season during the coolest part of the year, so they can’t change their reproductive timing to avoid hotter weather.

There’s simply no nice way to say it: the future for these beloved animals is looking pretty bleak unless our species can band together to address and mitigate climate change. And more and more, scientists are showing that other species face similar fates as temperatures rise, weather patterns change, and our seas become more acidic. It’s on us now to decide just how much the rest of the species on this planet matter—and what we’re willing to do to save them.

 

Citation: Woodroffe et al. 2017. Hot dogs: High ambient temperatures impact reproductive success in a tropical carnivoreJ Anim Ecoldoi: 10.1111/1365-2656.12719

CATEGORIZED UNDER: Ecology, More Science, select, Top Posts
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  • OWilson

    Due to an exploding human population and the need for ever more land and resources, the wild animal populations will be more at risk from range reduction, than from Climate Change.

    It wasn’t Climate Change that killed of the Mastodon and the passenger Pigeon, or is killing the Big Game.

    Some species of insects birds and animals have adapted well to living alongside man, but you’ll never see a Lion or a Tiger rummaging through the garbage bin in your back yard! :)

    • oatwillie

      It wasn’t climate change that…Oh. You were there?

  • lucy barrett

    my name is Lucy Barrett and i am 18 years old and i live in Ireland and everyday i fear for extinction of animals and when i get older i would love to stop the extinction. i try my hardest to stop extinction as much i can by piking up litter and throwing it in the bin,not using that much electricity, not learning how to drive and cycle everywhere, encouraging my parents to buy electric cars, nearly and becoming a vegetarian and lastly praying every night for these animals. i wish i could do more to these poor animals and i wish i could see a cause of improvement from my actions

    • jonathanpulliam

      You need to capitalize, and you say “I” eleven times in 3 sentences.

      My name is Jonathan and I agree with you that wild habitat preservation is important.

      My state, Massachusetts, allows hordes of fecal-matter spewing Canadian Geese to ruin our parks, and rather than monetize this crisis of their own making (the govt. introduced the species here as it is non-native) by allowing Goose Hunters to plop down their $100 for a State Goose-hunting license, they instead unwisely opted to pay secret contractors to euthanize the birds and distribute the remains to food pantries.

      Eew. I hope that’s how they spell “eew!” in Ireland.

      “They’re always after me lucky charms!”.

      Regards

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About Christie Wilcox

Dr. Christie Wilcox is a science writer and postdoctoral scholar at the University of Hawaii. She freelances for major media outlets including The New York Times and Popular Science. Her debut book, Venomous, releases August 2016 (Scientific American/FSG Books). To learn more about her life and work, check out her webpage or follow her on Twitter, Google+, or Facebook.

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