ML060940302

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Fws 1997a, Website Reference Used in Chapter 2 NMP FSEIS
ML060940302
Person / Time
Site: Nine Mile Point  Constellation icon.png
Issue date: 06/06/1997
From:
US Dept of Interior, Fish & Wildlife Service
To:
Office of Nuclear Reactor Regulation
References
Download: ML060940302 (1)


Text

U.S. Fish & Wildlife Service HabitatWhy It's Threatened Threatened and Endangered SpeciesAmerican Hart's-Tongue Fern (Asplenium scolopendrium var. americanum)The American hart's-tonguefern is a federally threatened species. Threatened species are animals and plants that are

likely to become endangered in

the foreseeable future.

Endangered species are ani-mals and plants that are in danger of becoming extinct.

Identifying, protecting, and restoring endangered and threatened

species is the primary objective of the U.S. Fish and Wildlife Service's endangered species

program.This fern is found in close association with outcrops of dolomitic limestone, in coulees, gorges and in cool limestone sinkholes in mature hardwood

forests. It requires high humidity and deep shade

provided by mature forest

canopies or overhanging rock cliffs. It prefers soils high in magnesium.Although this plant is found over a very wide area, from Alabama toCanada, its populations tend to be very small and isolated due to its unique habitat. Because of its natural rarity, it is particularly vulnerable to disturbance. Many activities threaten the American hart's-tongue.

Quarrying, recreation and residential development have all destroyed these plants and their habitat. Canadian populations are threatened by lumbering and the development of land for ski resorts and country estates, among other activities. By removing shade trees, logging raises light levels and lowers humidity, decimating any American hart's-tongue ferns in that area.U.S. Fish & Wildlife Service Endangered Species Division 1 Federal DriveFort Snelling, Minnesota 55111-4056 612/713-5350Federal Relay Service 1-800-877-8339 http://midwest.fws.gov/endangeredThis fern can be found in climates as different as

Canada and Alabama, suggesting that it had

spread widely since the last ice age.1997Photo by A. M. Evans