Anogramma ascensionis (original) (raw)
Anogramma ascensionis est une fougère de la famille des Pteridaceae, endémique de l'Île de l'Ascension. Elle a été classée comme éteinte en raison de perturbations écologiques de son habitat, jusqu'à la découverte de quatre spécimens sur l'île en 2010. Plus de 60 spécimens ont alors été cultivés en laboratoire.
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| dbo:abstract | Anogramma ascensionis, the Ascension Island parsley fern, is a species of fern in the family Pteridaceae that is endemic to Ascension Island, a volcanic island in the South Atlantic Ocean. It is one of eight putative species in the genus Anogramma. It was thought to have become extinct due to habitat loss, until four plants were found on the island in 2010. Over 60 specimens were then successfully cultivated at Royal Botanic Gardens, Kew and on Ascension Island. It is now classified as Critically Endangered. The small fern has delicate yellow-green leaves which appear similar to small sprigs of parsley. It was first recorded in 1842 by an amateur botanist, , and then officially described and named by Joseph Dalton Hooker after a visit he made to the island in 1843. It is endemic to the steep slopes of Green Mountain on the island. Another specimen was recorded in 1889, with few or no reports of specimens again until 1958, when a British scientist collected one on the north slope of the mountain. Further searches were conducted in 1976, 1986 and 1995 but were unsuccessful, and in 2003 it was officially declared extinct. There are ten species of plants endemic to Ascension Island, with seven of them still known to survive. The island lost much of its native habitat due to invasive animals and plants, beginning with goats introduced in the 16th century by Portuguese explorers. Other non-native animals, including rabbits, sheep, donkeys, and rats—along with over 200 non-native plant species—have destroyed much of the original habitat and plants. The introduction of non-native plants and animals was greatly hastened beginning in 1847, when Joseph Dalton Hooker advised the Royal Navy to import plants to the island to change the dry cinder soil and arid climate. Kew Gardens, whose director at the time was Hooker's father, helped ship trees to Ascension Island beginning in 1850. Green Mountain in particular was transformed through their efforts. Competition from invasive and non-native maidenhair fern (Adiantum) is believed to be partly responsible for the demise of A. ascensionis. A. ascensionis was rediscovered during a routine plant survey being performed by a team from the Ascension Island Government's Conservation Department. Because it was found growing in dry rock, on a very steep ridge, the four plants had to be watered and kept alive long enough to produce spores. Two of the plants produced spores before they died. After harvesting, the spores were quickly airlifted to Kew Gardens, where they were placed in a sterile environment to produce sporelings. Sixty new ferns were raised at Kew, along with more on Ascension Island. Since then, a small number of plants were discovered growing near the original four. (en) Anogramma ascensionis est une fougère de la famille des Pteridaceae, endémique de l'Île de l'Ascension. Elle a été classée comme éteinte en raison de perturbations écologiques de son habitat, jusqu'à la découverte de quatre spécimens sur l'île en 2010. Plus de 60 spécimens ont alors été cultivés en laboratoire. (fr) Anogramma ascensionis är en kantbräkenväxtart som först beskrevs av William Jackson Hooker, och fick sitt nu gällande namn av Friedrich Ludwig Diels. Anogramma ascensionis ingår i släktet Anogramma och familjen Pteridaceae. Inga underarter finns listade. (sv) |
| dbo:thumbnail | wiki-commons:Special:FilePath/Anogramma_ascensionis.jpg?width=300 |
| dbo:wikiPageExternalLink | http://www.bbc.co.uk/programmes/p0086hvg |
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| dbo:wikiPageWikiLink | dbr:Pteridaceae dbr:Royal_Botanic_Gardens,_Kew dbr:Endemism dbr:Anogramma dbc:Flora_of_Ascension_Island dbr:Joseph_Dalton_Hooker dbc:Taxonomy_articles_created_by_Polbot dbr:Parsley dbr:Adiantum dbr:Extinct dbr:Fern dbr:Green_Mountain dbr:Ascension_Island dbc:Plants_described_in_1843 dbc:Pteridaceae dbr:Habitat_loss dbr:South_Atlantic_Ocean dbr:Friedrich_Ludwig_Emil_Diels dbr:Andrew_Beveridge_Curror dbr:Wikt:putative |
| dbp:authority | Diels (en) |
| dbp:genus | Anogramma (en) |
| dbp:species | ascensionis (en) |
| dbp:status | CR (en) |
| dbp:statusSystem | IUCN3.1 (en) |
| dbp:wikiPageUsesTemplate | dbt:Reflist dbt:Short_description dbt:Speciesbox dbt:Taxonbar |
| dct:subject | dbc:Flora_of_Ascension_Island dbc:Taxonomy_articles_created_by_Polbot dbc:Plants_described_in_1843 dbc:Pteridaceae |
| gold:hypernym | dbr:Fern |
| rdf:type | yago:LivingThing100004258 yago:Object100002684 yago:Organism100004475 yago:PhysicalEntity100001930 yago:Plant100017222 dbo:Fern yago:Whole100003553 yago:WikicatPlantsDescribedIn1843 umbel-rc:Fern umbel-rc:Plant |
| rdfs:comment | Anogramma ascensionis est une fougère de la famille des Pteridaceae, endémique de l'Île de l'Ascension. Elle a été classée comme éteinte en raison de perturbations écologiques de son habitat, jusqu'à la découverte de quatre spécimens sur l'île en 2010. Plus de 60 spécimens ont alors été cultivés en laboratoire. (fr) Anogramma ascensionis är en kantbräkenväxtart som först beskrevs av William Jackson Hooker, och fick sitt nu gällande namn av Friedrich Ludwig Diels. Anogramma ascensionis ingår i släktet Anogramma och familjen Pteridaceae. Inga underarter finns listade. (sv) Anogramma ascensionis, the Ascension Island parsley fern, is a species of fern in the family Pteridaceae that is endemic to Ascension Island, a volcanic island in the South Atlantic Ocean. It is one of eight putative species in the genus Anogramma. It was thought to have become extinct due to habitat loss, until four plants were found on the island in 2010. Over 60 specimens were then successfully cultivated at Royal Botanic Gardens, Kew and on Ascension Island. It is now classified as Critically Endangered. (en) |
| rdfs:label | Anogramma ascensionis (en) Anogramma ascensionis (fr) Anogramma ascensionis (sv) |
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