Conserving Top Predators Keeps CO2 Out of the Air
by Tanya Dimitrova
What does a wolf in Yellowstone National Park have in common with an ambush spider on a meadow in Connecticut? Both are predators and thus eat herbivores, such as elk (in the case of wolves) and grasshoppers (in the case of spiders).
Elk and grasshoppers also have more in common than you probably imagine: they both consume large quantities of plant matter. While scientists have long-known that predators lead to carbon storage by reducing herbivore populations, a new study reveals a novel way in which top predators cause an ecosystem to store more carbon.The paper, published in the Proceedings of the National Academy of Sciences (PNAS) found that by forcing herbivores to be more vigilant, carnivores indirectly reduce the grazing pressure on the plants. If you are a grasshopper and there are spiders in the area, you are definitely not grazing while you are looking out for them…
(read more: MongaBay)
photo: Fishing Spider, Pisaurina mira, by Dror Hawlena