A deadly fungus carried by an invasive beetle from southeast Asia is killing thousands of trees across the Everglades, and experts don't know how to stop it.
A fungal disease that is sapping the strength from white pines in southern Maine is growing worse, spreading more rapidly and leading to the mass destruction of these once-towering trees.
The iconic needle-leaved conifers of Minnesota's forests are due to face some big challenges in the approaching decades, according to researchers. A rising climate and shorter winters could mean less snow and more intense rainfall, tipping the scales away from conifers in favor of paddle-leaved plants.
Ecologists have long worried that as climate change continues to affect the seasons, trees might "leaf out" too early, only to be struck by late-season frosts. Some trees, however, are too clever for such a simple trick, somehow knowing to wait it out despite spurts of warm weather.
Scientists have confirmed the function of a gene that controls the awakening of trees from winter dormancy, a discovery that may be the key to a world in which trees don't have to worry about adapting to warmer climates.
Changes in tree-ring density in the Arctic may be evidence of changes in light intensity during the trees' growth, according to a new study by San Francisco State University researcher Alexander Stine.