Padina concrescens 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Chromista Ochrophyta Phaeophyceae Dictyotales Dictyotaceae

Scientific Name: Padina concrescens Thivy ex 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)
Not common but widespread. However, difficult to distinguish from the more common species and therefore owing to insufficient information on population trends and distribution the species is assessed as Data Deficient.

Geographic Range [top]

Range Description:All known records indicate that Padina concrescens is endemic to the Galápagos Islands; so far reported from: Floreana: Black Beach (Taylor 1945: type locality) and Post Office Bay (2004 UC, K.A. Miller pers. comm.). Santa Fé: two localities (2004 UC, K.A. Miller pers. comm.). Isabela: Tagus Cove (Taylor 1945). Fernandina: Punta Espinosa (Wellington 1975). Española: Gardner Bay (Taylor 1945). Santa Cruz: Academy Bay (1973 CDS).
Countries occurrence:
Ecuador (Galápagos)
FAO Marine Fishing Areas:
Pacific – southeast
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:P. concrescens is not a common species. Because it resembles other, more abundant Padina species, it is difficult to distinguish in the field; hence, its population has not been accurately assessed.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:P. concrescens occurs in a wide range of depths but most commonly in shallow water. It is a warm water species, occurring above the thermocline. Its prostrate habit makes it easy to graze, therefore it may be adversely affected by sea urchin grazing.

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: P. concrescens is present 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. Padina concrescens. The IUCN Red List of Threatened Species 2007: e.T63589A12685219. . Downloaded on 18 October 2017.
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