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Rhodymenia decumbens

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE RHODOPHYTA FLORIDEOPHYCEAE RHODYMENIALES RHODYMENIACEAE

Scientific Name: Rhodymenia decumbens
Species Authority: W.R.Taylor

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Miller, K.A., Garske, L. & Edgar, G.
Reviewer(s): Stuart, S.N. & Carpenter, K.E. (Global Marine Species Assessment Coordinating Team)
Justification:
No information is available on population size or trends, and there is little information on area of occupancy. More data are needed to adequately assess threat status, hence is listed as Data Deficient.

Geographic Range [top]

Range Description: Rhodymenia decumbens is an endemic species to the Galápagos Islands, reported from: Baltra (Taylor 1945). Isla Rabida (dredge 55 to 63 m) (1972 UC, K.A. Miller pers. comm.). Fernandina: Punta Espinosa (2004 UC, K.A. Miller pers. comm.), and Islet south of Cabo Douglas (2004 UC, K.A. Miller pers. comm.). Isabela: Cabo Berkeley (2004 UC, K.A. Miller pers. comm.), and Elizabeth Bay, Isabela (2004 UC, K.A. Miller pers. comm.).
Countries:
Native:
Ecuador (Galápagos)
FAO Marine Fishing Areas:
Native:
Pacific – southeast
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Unknown.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: R. decumbens has been reported from depths of 9 to 33 m on rocky substrata (Taylor 1945, K.A. Miller pers. comm.).
Systems: Marine

Threats [top]

Major Threat(s): Presumably El Niño and climate change. Ecosystem interactions involving these two factors appear to have caused widespread decline in algal populations because of an increase in density of grazing sea urchins and other herbivores, following overexploitation of predators along with ENSO disturbances.

Conservation Actions [top]

Conservation Actions: R. decumbens occurs within the Galápagos Marine Reserve (IUCN category VI); Galápagos Archipelago Particularly Sensitive Sea Area (PSSA); Galápagos Island World Heritage Site (UNESCO N (i)(ii)(iii)(iv)), and Galápagos Island Man and Biosphere Reserve (UNESCO).

Citation: Miller, K.A., Garske, L. & Edgar, G. 2007. Rhodymenia decumbens. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 23 October 2014.
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