Najas marina ssp. ehrenbergii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Hydrocharitales Hydrocharitaceae

Scientific Name: Najas marina L. ssp. ehrenbergii (A.Braun) L.Triest
Parent Species:
Common Name(s):
English Spiny Naiad

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2010
Date Assessed: 2007-09-15
Assessor(s): Ali, M.M.
Reviewer(s): Grillas, P., Temple, H. (IUCN Species Programme), Rhazi, L. & de Bélair, G.
Najas marina ssp. ehrenbergii has a small area of occupancy (presumed to be less than 2,000 km² although it has not been quantified) and is considered to be declining. But it is found at more than 10 locations and is not severely fragmented. More research on its distribution is needed. It is therefore listed as Near Threatened.

Geographic Range [top]

Range Description:This species is endemic to North Africa and is found in Algeria, Tunisia, Libya and Egypt.

The area of occupancy is suspected to be less than 2,000 km² although it has not been quantified. The species is found at more than 10 locations and is not severely fragmented.
Countries occurrence:
Algeria; Egypt; Libya; Tunisia
Additional data:
Estimated area of occupancy (AOO) - km2:500-2000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is very rare in Egypt. There is no information on the population trend available but it is suspected to be declining.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species occurs in fresh and brackish waters.

Threats [top]

Major Threat(s): The major threats are competiton by introduced plants and intrinsic factors such as low dispersal.

Conservation Actions [top]

Conservation Actions: Research on population numbers and range, as well as habitat maintenance and conservation are needed.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
5. Wetlands (inland) -> 5.5. Wetlands (inland) - Permanent Freshwater Lakes (over 8ha)
5. Wetlands (inland) -> 5.7. Wetlands (inland) - Permanent Freshwater Marshes/Pools (under 8ha)
5. Wetlands (inland) -> 5.14. Wetlands (inland) - Permanent Saline, Brackish or Alkaline Lakes
5. Wetlands (inland) -> 5.16. Wetlands (inland) - Permanent Saline, Brackish or Alkaline Marshes/Pools
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.1. Unspecified species
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.3. Indirect species effects -> 2.3.2. Competition

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology

Bibliography [top]

Boulos, L. 2005. Flora of Egypt. Volume 4. Monocotyledons (Alismataceae - Orchidaceae). Al Hadara Publishing, Cairo.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.2). Available at: (Accessed: 29 June 2010).

Citation: Ali, M.M. 2010. Najas marina ssp. ehrenbergii. The IUCN Red List of Threatened Species 2010: e.T164548A5907201. . Downloaded on 25 February 2018.
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