Vanvoorstia bennettiana

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Vanvoorstia bennettiana
Claudea (= Vanvoorstia) bennettiana by William Henry Harvey

Claudea (= Vanvoorstia ) bennettiana by William Henry Harvey

Systematics
Subdivision : Rhodophytina
Class : Florideophyceae
Order : Ceramiales
Family : Delesseriaceae
Genre : Vanvoorstia
Type : Vanvoorstia bennettiana
Scientific name
Vanvoorstia bennettiana
( Harvey ) Papenfuss

Vanvoorstia bennettiana (English name: "Bennett's Seaweed") is an extinct red algae from Australia . The kind epithet honors the Australian naturalist George Bennett .

description

Vanvoorstia bennetiana is a small red alga. It can be distinguished from the other three species of the genus by its small size, the finer-meshed leaves and the reproductive organ structures, the stichidium.

distribution

Vanvoorstia bennettiana was only known from two places. Both are located near Sydney Harbor (also known as Port Jackson ). One location was near the eastern portion of Spectacle Island , where it was discovered between May 1 and May 15, 1855. The second location was a canal between Point Paper and Shark Island , where numerous specimens were collected in 1886.

die out

When it was discovered, Vanvoorstia bennettiana was considered common. Since then, however, Sydney Harbor has been massively changed by human activities, which was mainly noticeable in the increase in the silt level. Fine-meshed types of algae react very sensitively to this type of disturbance because the fine dust clogs the leaves and the light required for photosynthesis no longer reaches the organism.

A search by Arthur Lucas in 1916 was unsuccessful and since this species was only known from two places in the world, it is now considered extinct. The causes were human disturbance, habitat degradation and pollution along the entire New South Wales coast. In 2003 Vanvoorstia bennettiana was added to the list of extinct species by the IUCN .

literature

  • William Henry Harvey: Phycologia Australica; or a History of Australian Seaweeds Volume 2 . Lovel Reeve, London, 1859. (first scientific description)

Web links

Individual evidence

  1. ^ Department of the Environment and Water Resources: Vanvoorstia bennettiana (Bennett's Seaweed), a marine red alga . Government of Australia. Retrieved March 7, 2011.
  2. a b Bennett's Seaweed ( Memento of the original from June 25, 2014 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (New South Wales Department of Primary Industries, March 2007, PDF; 188 kB) @1@ 2Template: Webachiv / IABot / www.dpi.nsw.gov.au
  3. a b c Vanvoorstia bennettiana . In: IUCN Redlist of Threatened Species . IUCN. Retrieved March 7, 2011.
  4. ^ MD Guiry: Vanvoorstia bennettiana . AlgaeBase. September 24, 2004. Retrieved March 7, 2011.
  5. Vanvoorstia bennettiana - (Bennetts Seaweed) Fisheries Scientific Committee (Andrew Sanger) (PDF; 15 kB)