编辑推荐： 全球气候变化和人类活动致使生物多样性受损，为保护濒危的喜马拉雅榆（Ulmus wallichiana），研究人员开展结合种群遗传学和物种分布模型的研究。研究确定了遗传多样性热点和长期适宜区域等，对制定保护策略意义重大。

Growing a Chinese Elm bonsai tree is a rewarding and enjoyable experience. Chinese Elm is one of the most popular trees used for bonsai because of its adaptability to various weather conditions ...

One of the largest old elm trees in Toronto — possibly in all of southern Ontario — is on its last legs. But as the city finalizes plans to take down the Barton Avenue landmark next week, a ...

Brown University’s 155-acre campus is home to thousands of trees and is recognized for its impressive American elm collection. Last year, the campus lost an iconic community fixture, an elm tree ...

For decades, the American elm population has dwindled, and one of its greatest threats is the deadly Dutch elm disease, which has taken its toll on Brown’s campus, too. The tree removal ...

PORTLAND, Ore. (K O IN) — A tree representing a piece of Oregon history is entering its final days. Despite efforts from arborists and experts to save an “iconic” 154-year-old elm tree in ...

An iconic elm tree that has stood in downtown Portland since 1870 will be removed to protect community safety following declining health. Portland Parks & Recreation photo.

A tree on the Main Green may have helped. The Main Green’s dead elm tree was one of the ‘main pressure points’ during negotiations to end the spring encampment. A feature of the green for at least 80 ...

The City of Portland is removing a 154-year-old elm tree due to safety concerns, despite efforts to save it, and plans to plant a replacement tree by 2025.

PORTLAND, Ore. — A downtown Portland landmark took its final bow on Monday, as the city cut down a tree that's stood for more than 150 years. The towering, iconic elm tree has stood at 1111 ...

That’s a lotta green. Tavern on the Green is on the hook to pay a $30,000 tab to remove a roughly 160-year elm tree – as officials fear a lethal fungus could ravage Central Park’s greenery ...