It’s hard not to think of a cactus as a resilient plant. Living in
hot, drought-stricken climates, if it can survive there, surely it can
make it through anything. Sadly, this assumption is not reality for the
cactus. As an international team of researchers discovered, nearly one-third of all cactus species face a looming threat of extinction.
The study,
recently published in the scientific journal Nature Plants, examined
populations of nearly 1,500 cactus species – 31 percent of which were
deemed at risk of extinction. Collectively, the researchers found that
“cacti are among the most threatened taxonomic groups assessed to date.”
Here are three big reasons why cacti are in trouble:
1. Loss of Habitat
As
the global human population grows, so does the demand for land — land
for people to live on, land for growing crops and land for raising
livestock. Though most environmentalists are well aware of how this
phenomenon destroys Amazonian rainforests,
fewer probably realize it’s also responsible for clearing arid climates
as well. Consequentially, landowners chop down rare cactus species
without much thought to how few remain throughout the world.
2. Illegal Sale
Thanks
to their exotic beauty, cacti are popular purchases in regions where
they don’t naturally grow, particularly Europe. Though trade of cacti is
largely illegal, because of the hefty prices cacti can fetch (up to $1,000 for a single cactus,) people are willing to take the risk and snatch grown cacti from their natural habitats anyway.
In
these new non-native environments, buyers often do not understand the
conditions necessary to keep them alive, let alone how to help them
reproduce, meaning they die out. Additionally, by having fewer cacti in
natural habitats, there are far fewer seeds around for new cacti to
grow.
3. Climate Change
Like most life forms on the planet, cacti are vulnerable to the consequences of climate change.
So far, cacti can withstand the increased temperatures, but they
ultimately lose when other desert creatures aren’t as adaptable. For
example, some cactus species rely on butterflies for pollination, and
with monarch butterflies dying off from climate change, those cacti are
under threat.
Furthermore, although we think of cacti as living in
isolated deserts, some species live near the coast. With the rising sea
levels accompanying climate change, habitats for these cacti may be
underwater in another century or so.
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