The nearly 400-year-old history of oaks in South Africa may be coming to an end, forever changing the treescape of towns and cities such as Cape Town, George, Paarl, Stellenbosch, and Swellendam.
Plants & Animals
Feb 20, 2024
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25
Oak forests play a vital role in our ecosystem, providing climate regulation and erosion control across North America. However, these forests face compounding threats from drought and oak wilt, and it can be challenging to ...
Ecology
Feb 6, 2024
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38
While collecting cores from oak trees on Fire Island National Park, Nicole Davi, a dendrochronologist who works at the Climate School's Lamont-Doherty Earth Observatory, explains the critical role maritime forests play in ...
Ecology
Jan 31, 2024
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14
A flagship seven-year study led by the University of Oklahoma that explores how environmental stresses influence different ecological processes shaping the composition and structure of microbial communities in groundwater, ...
Ecology
Jan 17, 2024
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1
Leaves rustled as Mike Cirone reached into a tree and gently picked an apple. The orchard was filled with a profusion of ripe fruit in shades from golden-green to pinkish red.
Agriculture
Nov 30, 2023
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1
The Populus genus, commonly known as poplars, cottonwoods, and aspens, consists of approximately 30 tree species native to the northern hemisphere. Because of their diverse usages in landscape, agriculture, bioenergy, and ...
Plants & Animals
Oct 30, 2023
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2
Diseases are among the major causes of tree mortality in both forests and urban areas. New diseases are continually being introduced, and pathogens are continually jumping to new hosts, threatening more and more tree species. ...
Plants & Animals
Oct 3, 2023
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14
As our climate rapidly changes, greater numbers of trees are dying from diseases like oak wilt. Oak wilt is a fungus that moves through the vascular system of oak trees causing rapid mortality. The disease can be stopped ...
Plants & Animals
Sep 18, 2023
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1
Nobody can argue that this summer was one for the weather record books, with NASA declaring July the hottest since records have been kept, smoke from Canadian wildfires wafting into the U.S. and a massive blaze killing more ...
Environment
Sep 6, 2023
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10
The shells of turtles, tortoises, and sea turtles keep growing as long as the animals live—and some of them live a remarkably long time.
Plants & Animals
Aug 23, 2023
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15
An oak is a tree or shrub in the genus Quercus ( /ˈkwɜrkəs/; Latin "oak tree"), of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the northern hemisphere, and includes deciduous and evergreen species extending from cold latitudes to tropical Asia and the Americas.
Oaks have spirally arranged leaves, with a lobed margin in many species; some have serrated leaves or entire leaves with a smooth margin. The flowers are catkins, produced in spring. The fruit is a nut called an acorn, borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on species. The live oaks are distinguished for being evergreen, but are not actually a distinct group and instead are dispersed across the genus.
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