Halodule beaudettei 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Najadales Cymodoceaceae

Scientific Name: Halodule beaudettei (Hartog) Hartog
Common Name(s):
English Shoal Grass, Species code: Hy
Taxonomic Notes: The taxonomy of this species is questionable and it is listed as a synonym of H. wrightii (Hammel et al. 2003). Its taxonomic status is based on leaf-tip morphology which is highly variable (Larkum et al. 2006).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2010
Date Assessed: 2007-03-21
Assessor(s): Short, F.T., Carruthers, T.J.R., van Tussenbroek, B. & Zieman, J.
Reviewer(s): Livingstone, S., Harwell, H. & Carpenter, K.E.
There is little information on the population status of Halodule beaudettei. Major threats to the species are unknown, although there is some localized coastal development. This species is listed as Data Deficient. Research on the distribution, taxonomy and population status are recommended.

Geographic Range [top]

Range Description:Halodule beaudettei is found in the Caribbean in Yucatan (Mexico), Belize and Barbados. Halodule beaudettei is also reported in the Indian Ocean from the northeast coast of Madagascar (Eiseman 1980).
Countries occurrence:
Barbados; Belize; Madagascar; Mexico (Yucat√°n)
FAO Marine Fishing Areas:
Atlantic – western central; Indian Ocean – western
Additional data:
Lower depth limit (metres):15
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population status of Halodule beaudettei is unknown.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Halodule beaudettei is found on a wide variety of substrata, from silty mud to coarse sand with varying amounts of mud (Phillips 1960).

Generation Length (years):2

Threats [top]

Major Threat(s): Major threats to this species occur from coastal development.

Conservation Actions [top]

Conservation Actions: There are no known specific conservation measures for this species. Research on the distribution, taxonomy and population status are recommended.

Classifications [top]

9. Marine Neritic -> 9.4. Marine Neritic - Subtidal Sandy
9. Marine Neritic -> 9.5. Marine Neritic - Subtidal Sandy-Mud
9. Marine Neritic -> 9.6. Marine Neritic - Subtidal Muddy
9. Marine Neritic -> 9.9. Marine Neritic - Seagrass (Submerged)
12. Marine Intertidal -> 12.2. Marine Intertidal - Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc
12. Marine Intertidal -> 12.4. Marine Intertidal - Mud Flats and Salt Flats
12. Marine Intertidal -> 12.6. Marine Intertidal - Tidepools

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.1. Housing & urban areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Residential & commercial development -> 1.2. Commercial & industrial areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

6. Human intrusions & disturbance -> 6.1. Recreational activities
♦ timing:Past, Unlikely to Return    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.5. Threats
3. Monitoring -> 3.1. Population trends

Bibliography [top]

Elseman, N.J. 1980. An Illustrated Guide to the Sea-Grasses of the Indian River Region of Florida. Harbor Branch Foundation, Florida.

Green, E.P. and Short, F.T. 2003. World Atlas of Seagrasses. University of California Press, Berkeley.

Hammel, B.E., Grayum, M.H., Herrera, C. and Zamora, N. 2003. Maual de Plantas de Costa Rica. Missouri Botanical Garden Press, Missouri.

Hemminga, M.A. and Duarte, C.M. 2000. Seagrass Ecology. Cambridge University Press, Cambridge.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).

Kenworthy, W.J and Fonseca, M.S. 1996. Light requirements of seagrasses Halodule wrightii and Syringodium filiforme derived from the relationship between diffuse light attenuation and maximum depth distribution. Estuaries 19(3): 740-750.

Larkum, A.W.D., Orth, R.J. and Duarte, C.M. (eds). 2006. Seagrasses: Biology, Ecology and Conservation. Springer, Dordrecht.

Phillips, R.C. 1960. Observations on the ecology and distribution of the Florida seagrasses. Florida Board of Conservation Professional Paper Series 2: 1-72.

UNESCO. 1998. CARICOMP-Caribbean coral reef, seagrass and mangrove sites. Coastal region and small island papers. UNESCO, Paris.

Citation: Short, F.T., Carruthers, T.J.R., van Tussenbroek, B. & Zieman, J. 2010. Halodule beaudettei. In: . The IUCN Red List of Threatened Species 2010: e.T173329A6992218. . Downloaded on 21 June 2018.
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