As a recent article in the scientific journal Trends in Ecology & Evolution notes, the world's largest trees are among the longest-living organisms on Earth, and play important roles in ecosystems across the planet. But these majestic giants also face a range of serious threats, from deforestation, drought and invasive species to climate change. With a nod to Arbor Day, here 's a rundown of some of the Earth's biggest tree species -- and what ails them.
The Giant Sequoia is found only in about 75 groves along the western slope of the Sierra Nevada mountains in California. The tallest specimen is around 274 feet in height. According to Yale's Environment 360 website, giant sequoias face a threat from climate change, because longer summers and insufficient snowpack from drought may make it difficult for young trees to survive.
Photos Capture Some Of The Oldest Trees On Earth