01 Jun '18, 7pm

Taller, older trees fare better during Amazon droughts, study finds

Taller, older trees fare better during Amazon droughts, study finds

A new study finds that droughts will likely be harder on shorter, younger trees than on taller, older ones. But, conversely, smaller trees seem to be better at coping with higher temperatures. They discovered that photosynthesis in forests comprised of trees that are shorter than 20 meters is three times more sensitive to rainfall inconsistency than forests where trees average 30 meters or more. The researchers think this is because taller trees are older, and older trees have deeper roots that allow them to tap into moister soil. In the past few years, there’s been a noticeable drying trend in parts of the Amazon, one that scientists fear will only intensify as climate change ramps up. Droughts aren’t usually a problem for rainforests, which, as their name implies, are generally typified by lots of precipitation. But in the past few years, there’s been a noticeable drying...

Full article: https://news.mongabay.com/2018/06/taller-older-trees-fare...

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