Common Names in English:
Ascension Island Parsley Fern
Biome: Terrestrial .
individuals occur on sparsely vegetated, vertical
banks exposed to the prevailing wind, and thus receive moderately
regular moisture from incoming mists. However, those sites at lower
may be subject to arid
conditions for long periods. Before
the introduction of a large number of weed
species to the island
from the mid 1800s onward, it seems likely that there would have
been much similar habitat
across the rock faces
of Green Mountain,
although most suitable areas are now covered with dense growths of
species, particularly in the damper locations
which may once have represented optimum habitat conditions. Known
localities are often associated with the native
Plagiochasma rupestre (G.
A. ascensionis produces green spores which must germinate soon after dispersal . In other Anogramma species, the gametophytes can persist for long periods, propagating vegetatively via gemmae which may have some dormancy capabilities. The sporophytes are short-lived, and only produced under suitable conditions. These features are probably also characteristic of A. ascensionis, which suggests that desiccation of the delicate gametophyte thallus may be a critical limiting factor in survival. Most recently observed plants are very small, reaching no more than 2-4cm high, although from older specimens it is known that heights of at least 10cm were once attained. The diminutive size and persistence of the minute gametophytes ensures that the competitive ability is very low. It is clearly an ephemeral , colonist species, exploiting relatively bare, harsh habitats before later successional communities develop. Potentially suitable habitat areas are now rare on Green Mountain and are likely to suffer further declines..
List of Habitats:
- 6 Rocky areas (eg. inland cliffs , mountain peaks) [more info]
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Cronquist, Takhtajan & W. Zimmermann, 1966
- (Eichler, 1883) Cavalier-Smith, 1998
- Infraphylum: Filices () - (Linnaeus, 1753) Cavalier-Smith, 1998
- Subphylum: Pteridophytina () - (Eichler, 1883) Cavalier-Smith, 1998 - Pteridophytes
- Phylum: Polypodiophyta () - Cronquist, Takhtajan & W. Zimmermann, 1966 - Ferns
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Members of the genus Anogramma
ZipcodeZoo has pages for 1 species, subspecies, varieties, forms, and cultivars in this genus:
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- Ashmole, P. and Ashmole M. 2000. St Helena and Ascension Island: a natural history. Anthony Nelson, Oswestry, UK.
- Cronk, Q.C.B. 1980. Extinction and survival in the endemic flora of Ascension Island. Biological Conservation 17(3): 207-219.
- Cronk, Q.C.B. 1992. Relict floras of Atlantic Islands: patterns assessed. Biological Journal of the Linnean Society. 46: 91-103.
- Cronk, Q.C.B. 1997. Islands: stability, diversity, and conservation. Biological Conservation. 6: 477-493.
- Cronk, Q.C.B. 2000. The Endemic Flora of St. Helena. Anthony Nelson Publishers, Oswestry, UK.
- Duffey, E. 1964. The terrestrial ecology of Ascension Island. Journal of Applied Ecology 1: 219-251.
- Gray, A, Gardner, S, Kirk, L, Robinson, P, Smölka, Z, and Webster, L, (2000). The Status and Distribution of the Endemic Vascular Flora of Ascension Island. Unpublished Report.
- Gray, A. 2003. Anogramma ascensionis. In: IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 27 May 2010).
- Gray, A., Gardner, S., Kirk, L., Robinson, P., Smlka, Z. and Webster, L. 2000. The status and distribution of the endemic vascular flora of Ascension Island. Unpublished Report.
- Gray, A., Pelembe, T. and Stroud, S. 2005. The conservation of the endemic vascular flora of Ascension Island and the threats from alien species. Oryx 39: 1-6.
- IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
- Packer, J.E. 2002. A Concise Guide to Ascension Island. South Atlantic Ascension Heritage Society, Georgetown.
- Royal Botanic Gardens, Kew. 2009. Data extracted from notes accompanying collection of herbarium specimens. Accessed 2009. Royal Botanic Gardens, Kew, London.
- White, R, and George, T. 2002. Status of endemic plants on Ascension Island in 2002. Ascension Conservation Draft Report.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 15, 2012.
- IUCN 2012. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on January 28, 2012.
- Lambdon, P.W., Stroud, S., Gray, A., Niissalo, M., Renshaw, O. & Sarasan, V. 2010. Anogramma ascensionis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloadedon 30January2012.
- Biodiversity Heritage Library NamebankID: 7151654
- Globally Unique Identifier: urn:lsid:ipni.org:names:17022520-1
- International Plant Names Index (IPNI) ID: 17022520
- IUCN ID: 191290
- Zipcode Zoo Species Identifier: 644244