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Beech

Fagus grandifolia, the American beech or North American beech, is the only species of beech native to North America. Its current range comprises the eastern United States, isolated pockets of Mexico and southeastern Canada.[4] Prior to the glacial maximum of the Pleistocene epoch, the tree flourished over most of North America, reaching California.[5]

Description

Fagus grandifolia is a large deciduous tree[6] growing to 16–35 metres (52–115 feet) tall,[7] with smooth, silver-gray bark. The leaves are dark green, simple and sparsely-toothed with small teeth that terminate each vein, 6–12 centimetres (2+144+34 inches) long (rarely 15 cm or 6 in), with a short petiole. The winter twigs are distinctive among North American trees, being long and slender (15–20 millimetres or 5834 inch by 2–3 mm or 33218 in) with two rows of overlapping scales on the buds. Beech buds are distinctly thin and long, resembling cigars; this characteristic makes beech trees relatively easy to identify. The tree is monoecious, with flowers of both sexes on the same tree. The fruit is a small, sharply-angled nut, borne in pairs in a soft-spined, four-lobed husk. It has two means of reproduction: one is through the usual dispersal of seedlings, and the other is through root sprouts, which grow into new trees.[8]

Taxonomy

Trees in the southern half of the range are sometimes distinguished as a variety, F. grandifolia var. caroliniana, but this is not considered distinct in the Flora of North America. The Mexican beech (F. grandifolia subsp. mexicana), native to the mountains of central Mexico, is closely related, and is treated as a subspecies of American beech, but some botanists classify it as a distinct species. The only Fagus species found in the Western Hemisphere (assuming the Mexican subspecies is treated as such), F. grandifolia is believed to have spanned the width of the North American continent all the way to the Pacific coast before the last ice age.

Two subspecies are generally recognized:[3]

Image Scientific name Distribution
Fagus grandifolia subsp. grandifolia Eastern Canada, east-central United States.
Fagus grandifolia subsp. mexicana (Martínez) A.E.Murray Mexico (Tamaulipas to Hidalgo and Puebla).

Etymology

The genus name Fagus is Latin for "beech", and the specific epithet grandifolia comes from grandis "large" and folium "leaf", in reference to the American beech's larger leaves when compared to the European beech.[9]

Distribution and habitat

The American beech is native to eastern North America, from Nova Scotia west to southern Ontario in southeastern Canada, west to Wisconsin and south to eastern Texas and northern Florida in the United States, as well as the states of Hidalgo, Veracruz, Tamaulipas, Puebla, San Luis Potosí, and Tabasco in Mexico.[10] Mature specimens are rare in lowland areas as early settlers quickly discovered that the presence of the tree indicated good farmland.

The American beech is a shade-tolerant species,[7] commonly found in forests in the final stage of succession. Few trees in its natural range other than sugar maple match it for shade tolerance. Ecological succession is essentially the process of forests changing their composition through time; it is a pattern of events often observed on disturbed sites.[11] Although sometimes found in pure stands, it is more often associated with sugar maple (forming the beech–maple climax community), yellow birch, and eastern hemlock, typically on moist, well-drained slopes and rich bottomlands. Near its southern limit, it often shares canopy dominance with southern magnolia. Although it has a reputation for slow growth (sometimes only 13 feet in 20 years), rich soil and ample moisture will greatly speed the process up. American beech favours a well-watered, but also well-drained spot and is intolerant of urban pollution, salt, and soil compaction. It also casts heavy shade and is an extremely thirsty tree with high moisture requirements compared to oaks, so it has a dense, shallow root system.[12]

Ecology

The mast (crop of nuts) from American beech provides food for numerous species of animals. Among vertebrates alone, these include various birds[7] including ruffed grouse and wild turkeys, raccoons,[7] foxes,[7] white-tailed deer,[7] rabbits, squirrels,[7] opossums, pheasants, black bears,[7] and porcupines.[7] Beech nuts were one of the primary foods of the now-extinct passenger pigeon;[7] the clearing of beech and oak forests is pointed to as one of the major factors that may have contributed to the bird's extinction.[13] Some Lepidoptera caterpillars feed on beeches. Deer occasionally browse on beech foliage,[7] but it is not a preferred food.

Diseases and pests

Beech bark disease has become a major killer of beech trees in the Northeastern United States. This disease occurs when the European beech scale insect, Cryptococcus fagisuga, attacks the bark, creating a wound that is then infected by Neonectria ditissima or Neonectria faginata, two species of fungi. This causes a canker to develop and the tree is eventually killed.[14]

Beech leaf disease is caused by the nematode Litylenchus crenatae mccannii. It was discovered in Ohio in 2012 and identified as far south as Virginia in 2022.[15] Beech leaf disease causes severe damage to the American beech and also to the related European beech.[16]

The beech leaf-miner weevil, a species native to Europe, has been identified in North America as a cause of defoliation of American beech trees.[17] American beech trees have small gaps and crevices at the base of their trunks in which the pest overwinter before eventually making their way to the buds of the trees and finally laying eggs on the underside of the leaves.[18] Once hatched, the larvae mine the leaves, causing destruction to the foliage.

Beech blight aphids colonize branches of the tree, but without serious harm to otherwise healthy trees. Below these colonies, deposits of sooty mold develop caused by the fungus Scorias spongiosa growing saprophytically on the honeydew the insects exude. This is also harmless to the trees.[19]

Despite their high moisture needs, beeches succumb to flooding easily and their thin bark invites damage from animals, fire, and human activities. Late spring frosts can cause complete defoliation of the tree, although they typically recover by using reserve pools of sugar.[20] The trunks of mature beeches often rot and develop cavities that are used by wildlife for habitation.[21]

Uses

American beech is an important tree in forestry.[citation needed] The wood is hard and difficult to cut or split, although at 43 pounds per cubic foot (0.69 g/cm3) it is not exceptionally heavy, and it also rots relatively easily.[citation needed] It is used for a wide variety of purposes, most notably bentwood furniture as beech wood easily bends when steamed.[citation needed] It also makes high quality, long-burning firewood.

Like European beech bark, the American beech bark is smooth and uniform, making it an attraction for people to carve names, dates, decorative symbols such as love hearts or gang identifiers, and other material into its surface.[22] One such beech tree in Louisville, Kentucky, in what is now the southern part of Iroquois Park, bore the legend "D. Boone kill a Bar 1803."[23] The beech finally fell over in 1916 during a storm; its age was estimated at around 325 years. Its trunk is now on display at the Filson Historical Society.

It is sometimes planted as an ornamental tree, but even within its native area, it is planted much less often than the European beech. Although American beech can handle hotter climates,[24] its European cousin is faster-growing and more pollution-tolerant, in addition to being easier to propagate.[citation needed]

American beech does not produce significant quantities of nuts until the tree is about 40 years old. Large crops are produced by 60 years. The oldest documented tree is 246 years old.[25] The fruit is a triangle-shaped shell containing 2–3 nuts inside, but many of them do not fill in, especially on solitary trees. Beech nuts are sweet and nutritious,[7] can be eaten raw by wildlife and humans,[26] or can be cooked.[27] They can also be roasted and ground into a coffee substitute.[7]

The leaves are edible when cooked.[7] The inner bark can be dried and pulverized into bread flour as an emergency food.[7]

References

  1. ^ Barstow, M. (2017). "Fagus grandifolia". IUCN Red List of Threatened Species. 2017: e.T62004694A62004696. doi:10.2305/IUCN.UK.2017-3.RLTS.T62004694A62004696.en. Retrieved 3 September 2023.
  2. ^ "Fagus grandifolia. NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 6 July 2023.
  3. ^ a b c d "Fagus grandifolia Ehrh. - Plants of the World Online". Plants of the World Online. Retrieved 2023-04-24.
  4. ^ Agriculture Handbook. U.S. Department of Agriculture. 1990.
  5. ^ U.S. Department of Agriculture, Forest Service. 1965. Silvics of forest trees of the United States. H. A. Fowells, comp. U.S. Department of Agriculture, Agriculture Handbook 271. Washington, DC. 762 p.
  6. ^ "Trees of the Adirondacks: American Beech | Fagus grandifolia". wildadirondacks.org.
  7. ^ a b c d e f g h i j k l m n o Angier, Bradford (1974). Field Guide to Edible Wild Plants. Harrisburg, PA: Stackpole Books. p. 32. ISBN 0-8117-0616-8. OCLC 799792.
  8. ^ Farahat, Emad; Lechowicz, Martin J. (2013). "Functional Ecology of Growth in Seedlings Versus root Sprouts of Fagus grandifolia Ehrh". Trees. 27 (1): 337–340. Bibcode:2013Trees..27..337F. doi:10.1007/s00468-012-0781-9. S2CID 17109648.
  9. ^ Hyam, R. & Pankhurst, R.J. (1995). Plants and their names : a concise dictionary. Oxford: Oxford University Press. pp. 169, 217. ISBN 978-0-19-866189-4.
  10. ^ Tubbs, Carl H.; Houston, David R. "Fagus grandifolia E h rh". www.srs.fs.usda.gov. United States Department of Agriculture. Retrieved June 22, 2021.
  11. ^ Horn, Henry S. (1974). "The Ecology of Secondary Succession". Annual Review of Ecology and Systematics. 5: 25–37. doi:10.1146/annurev.es.05.110174.000325.
  12. ^ North Carolina Cooperative Extension, Extension Gardener Tool Box, Fagus grandifolia. North Carolina State University, Raleigh, NC, accessed July 9, 2022
  13. ^ Jon M. Conrad, "Open access and extinction of the passenger pigeon in North America", Natural Resource Modeling, Vol. 18, no. 4, pp. 501–519. 2005
  14. ^ Reed, Sharon E.; Volk, Daniel; Martin, Danielle K.H.; Hausman, Constance E.; Macy, Tom; Tomon, Tim; Cousins, Stella (January 2022). "The distribution of beech leaf disease and the causal agents of beech bark disease (Cryptoccocus fagisuga, Neonectria faginata, N. ditissima) in forests surrounding Lake Erie and future implications". Forest Ecology and Management. 503: 119753. doi:10.1016/j.foreco.2021.119753.
  15. ^ Kantor, M.; Handoo, Z.; Carta, L.; Li, S. (1 June 2022). "First Report of Beech Leaf Disease, Caused by Litylenchus crenatae mccannii , on American Beech ( Fagus grandifolia ) in Virginia". Plant Disease. 106 (6): 1764. doi:10.1094/PDIS-08-21-1713-PDN. PMID 34668402.
  16. ^ Viaene, Nicole; Ebrahimi, Negin; Haegeman, Annelies; Douda, Ondrej; Bruggen, A. van; Ogris, N.; Sirca, S.; Stare, B. Gerič; Perez-Sierra, A.; Groza, Mariana; Coman, M.; Hurley, M. J.; Lanterbecq, Déborah; Kerkhove, Simon Van; Leroy, Quentin (5 May 2022). "FAGUSTAT: Investigating Beech Leaf Disease, a threat to beech trees and forests in Europe".
  17. ^ Sweeney, Jonathan D.; Hughes, Cory; Zhang, Honghao; Hillier, N. Kirk; Morrison, Andrew; Johns, Rob (24 April 2020). "Impact of the Invasive Beech Leaf-Mining Weevil, Orchestes fagi, on American Beech in Nova Scotia, Canada". Frontiers in Forests and Global Change. 3: 46. Bibcode:2020FrFGC...3...46S. doi:10.3389/ffgc.2020.00046.
  18. ^ Edwards, Sara; Brodersen, Garrett; Hughes, Cory; Moore, Keegan; Morin, Benoit; Morrison, Andrew; Owens, Emily; Sweeney, Jon; Johns, Rob C. (March 2022). "Relationships between pest density and associated leaf necrosis for an invasive leaf-mining weevil, Orchestes fagi, on American beech (Fagus grandifolia)". Canadian Journal of Forest Research. 52 (3): 301–308. doi:10.1139/cjfr-2021-0104. hdl:1807/110206. ISSN 0045-5067. S2CID 238642621.
  19. ^ "Tom Volk's Fungus of the Month".
  20. ^ D'Andrea, Ettore; Rezaie, Negar; Battistelli, Alberto; Gavrichkova, Olga; Kuhlmann, Iris; Matteucci, Giorgio; Moscatello, Stefano; Proietti, Simona; Scartazza, Andrea; Trumbore, Susan; Muhr, Jan (October 2019). "Winter's bite: beech trees survive complete defoliation due to spring late-frost damage by mobilizing old C reserves". New Phytologist. 224 (2): 625–631. doi:10.1111/nph.16047. PMID 31282591. S2CID 195830424.
  21. ^ Kitching, R.L. (2000). Food webs and container habitats: the natural history and ecology of phytotelmata. London: Cambridge University Press.
  22. ^ David Martin, Smooth Bark Compulsion
  23. ^ Yumpu.com. "the filson club history quarterly - The Filson Historical Society". yumpu.com. Retrieved 2023-06-16.
  24. ^ Gardening with Native Plants of the South by Sally and Andy Wasowski, p.44
  25. ^ "Eastern OLDLIST A database of maximum tree ages for Eastern North America". Rocky Mountain Tree-Ring Research, Inc. & the Tree Ring Laboratory of Lamont–Doherty Earth Observatory and Columbia University.
  26. ^ Little, Elbert L. (1980). The Audubon Society Field Guide to North American Trees: Eastern Region. New York: Knopf. p. 381. ISBN 0-394-50760-6.
  27. ^ Elias, Thomas S.; Dykeman, Peter A. (2009) [1982]. Edible Wild Plants: A North American Field Guide to Over 200 Natural Foods. New York: Sterling. pp. 233–34. ISBN 978-1-4027-6715-9. OCLC 244766414.
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