Halophila decipiens
Ostenf.
Pays · région · aire protégée · écorégion · biome
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Calcul du tissu écologique de Halophila decipiens.
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Liste rouge IUCN
LC · Préoccupation mineure→Stable- Évaluation
- 2010 · v3.1
- Altitude
- – m
- Profondeur
- 58 – 1 m
État de la populationTexte officiel évaluation IUCNExpert
Halophila decipiens is widespread and locally abundant. It can have dense cover but low biomass. This species is often not collected or recorded, as the leaves can be obscured by sediments, and it is found in deeper water. Its global population trend is thought to be stable as it is increasing in some regions, although some localized declines have been observed in other regions due to localized threats.
The Midway Atoll (Hawaiian Islands) population forms dense patches with an average of 24,000 blades per square meter (McDermid et al. 2002).
The Costa Baja population displayed a total biomass of 5.2 ± 1.6 g dry weight (dw)/m² with a leaf-pair density of 2964 ± 778 during the winter months, a total biomass of 8.5 ± 2.2 g dw/m² and a leaf-pair density of 4016 ± 599 during the summer months (Santamaria-Gallegos et al. 2006).
In the west Florida shelf, this species covers an estimated 20,000 km² with an average coverage of 20%. During June of 1999, percent coverage was estimated at 45% in 10 m of water, 4% in 15 m, and 18% in 20 m. During the month of October, 1999, percent coverage was estimated at 74% in 10 m of water, 39% in 15 m, and 10% in 20 m. Biomass ranged from 0.02 to 2.64 g dry weight/m² . This species tends to follow typical sub-tropical seasonal cycles with lower biomass during the fall and winter months (Hammerstrom et al. 2006).
During 1972 to 1973, this species was reported to have a mean dry biomass of 0.14 g/m² along the northwest Cuban shelf at depths of up to 24.3 m. It was reported to be the least abundant seagrass studied, and accounted for 0.1% of total angiosperm biomass in the 2,000 km² range along the Cuban northwestern shelf (Buesa 1975).
Iverson and Bittaker (1986) reported H. decipiens occurring in small monotypic stands and sometimes occurring among H. wrightii in the northern offshore areas along the Big Bend, Florida in water deeper than five m. Data collected in 2000 showed no occurrence of H. decipiens along the Big Bend, Florida (Hale et al. 2004).
Halophila decipiens is not abundant or common in Bermuda: out of 55 sites sampled 3.6% had this species present; of these, 50% of sites sampled had less than six shoots per m2 (Murdoch et al. 2007).
The Midway Atoll (Hawaiian Islands) population forms dense patches with an average of 24,000 blades per square meter (McDermid et al. 2002).
The Costa Baja population displayed a total biomass of 5.2 ± 1.6 g dry weight (dw)/m² with a leaf-pair density of 2964 ± 778 during the winter months, a total biomass of 8.5 ± 2.2 g dw/m² and a leaf-pair density of 4016 ± 599 during the summer months (Santamaria-Gallegos et al. 2006).
In the west Florida shelf, this species covers an estimated 20,000 km² with an average coverage of 20%. During June of 1999, percent coverage was estimated at 45% in 10 m of water, 4% in 15 m, and 18% in 20 m. During the month of October, 1999, percent coverage was estimated at 74% in 10 m of water, 39% in 15 m, and 10% in 20 m. Biomass ranged from 0.02 to 2.64 g dry weight/m² . This species tends to follow typical sub-tropical seasonal cycles with lower biomass during the fall and winter months (Hammerstrom et al. 2006).
During 1972 to 1973, this species was reported to have a mean dry biomass of 0.14 g/m² along the northwest Cuban shelf at depths of up to 24.3 m. It was reported to be the least abundant seagrass studied, and accounted for 0.1% of total angiosperm biomass in the 2,000 km² range along the Cuban northwestern shelf (Buesa 1975).
Iverson and Bittaker (1986) reported H. decipiens occurring in small monotypic stands and sometimes occurring among H. wrightii in the northern offshore areas along the Big Bend, Florida in water deeper than five m. Data collected in 2000 showed no occurrence of H. decipiens along the Big Bend, Florida (Hale et al. 2004).
Halophila decipiens is not abundant or common in Bermuda: out of 55 sites sampled 3.6% had this species present; of these, 50% of sites sampled had less than six shoots per m2 (Murdoch et al. 2007).
Menaces identifiées(3 menaces classées CMP-IUCN)
1_2Commercial & industrial areasOngoing5_4_6Motivation Unknown/UnrecordedOngoing9_3_2Soil erosion, sedimentationOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Halophila decipiens has few major threats partly because it is found in deeper waters. Coastal development can locally affect seagrass beds in more shallow areas, as can reduced water quality. Trawls can disturb beds in deeper areas, but these are usually recolonized rapidly.
This species has numerous natural grazers such as turtles, dugongs and fish, and if in high numbers these can reduce biomass considerably.
This species has numerous natural grazers such as turtles, dugongs and fish, and if in high numbers these can reduce biomass considerably.
Habitats préférentiels (classification IUCN)
9_10Marine Neritic - Estuaries9_4Marine Neritic - Subtidal Sandy9_5Marine Neritic - Subtidal Sandy-Mud9_6Marine Neritic - Subtidal Muddy9_8_3Foreslope (Outer Reef Slope)9_8_5Inter-Reef Soft Substrate9_8_6Inter-Reef Rubble Substrate9_9Marine Neritic - Seagrass (Submerged)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
No specific conservation measures are in place for H. decipiens, party due to its habitat in deeper waters. It is found in some protected areas (e.g., Belize, GBR) but it is often outside Marine Protected Areas (MPAs) because of its depth range. Currently, a seagrass management plan is being developed in Bermuda (Sarkis pers. comm. 2007).
Research on the biology of this species is recommended because of its deep water habitat.
Research on the biology of this species is recommended because of its deep water habitat.
Stress écologiques (5)Stresses Classification — IUCNExpert
1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_2Species disturbance2_2Species disturbance
Priorités de recherche (1)Research Needed Classification — IUCNExpert
1_3Life history & ecology
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Systèmes (terrestre/eau douce/marin)
Marine
Formes de croissance
Graminoid
Zones de pêche FAO
Atlantic - western centralAtlantic - southwestIndian Ocean - westernIndian Ocean - easternPacific - northwestPacific - western centralPacific - eastern central
Références bibliographiques (22)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: <a href="http://www.iucnredlist.org">http://www.iucnredlist.org</a>. (Accessed: 2 September 2010).
- McMahon, K.M. and Waycott, M. 2009. New record for <i>Halophila decipiens</i> Ostenfeld in Kenya based on morphological and molecular evidence. <i>Aquatic Botany</i> 91(4): 318-320.
- Novak, A.B., Hines, E., Kwan, D., Parr, L., Tun, M.T., Win, H. and Short, F.T. 2009. Revised ranges of seagrass species in the Myeik Archipelago, Myanmar. <i>Aquatic Botany</i> 91(3): 250-252.
- Murdoch, T.J.T., Glasspool, A.F., Outerbridge, M., Ward, J., Manuel, S., Gray, J., Nash, A., Coates, K.A., Pitt, J., Fourqurean, J.W., Barnes, P.A., Vierros., M., Holzer, K. and Smith, S.R. 2007. Large-scale decline of offshore seagrass meadows in Bermuda. <i>Marine Ecology Progress Series</i>: 123-130.
- Santamaría-Gallegos, N A., Riosmena-Rodríguez, R. and Sánchez-Lizaso, J.L. 2006. Occurrence and seasonality of <i>Halophila decipiens</i> Ostenfeld in the Gulf of California. <i>Aquatic Botany</i> 84(4): 363-366.
- Larkum, A.W.D., Orth, R.J. and Duarte, C.M. (eds). 2006. <i>Seagrasses: Biology, Ecology and Conservation</i>. Springer, Dordrecht.
- Hammerstrom, K.K., Kenworthy, W.J., Fonseca, M.S. and Whitfield, P.E. 2006. Seed bank, biomass, and productivity of <i>Halophila decipiens</i>, a deep water seagrass on the west Florida continental shelf. <i>Aquatic Botany</i> 84(2): 110-120.
- Hale, J.A., Frazer, T.K., Tomasko, D.A. and Hall, M.O. 2004. Changes in the distribution of seagrass species along Florida's central Gulf Coast: Iverson and Bittaker revisited. <i>Estuaries</i> 27(1): 36-43.
- Green, E.P. and Short, F.T. 2003. <i>World Atlas of Seagrasses</i>. University of California Press, Berkeley.
- McDermid, K.J., Gregoritza, M.C. and Freshwater, D.W. 2002. A new record of a second seagrass species from the Hawaiian archipelago: <i>Halophila decipiens</i> Ostenfeld. <i>Aquatic Botany</i> 74: 257-262.
- Schils, T. 2002. Macroalgal assemblages of the Socotra Archipelago. Conservation and sustainable use of biodiversity of Socotra Archipelago. Marine habitat, biodiversity and fisheries surveys and management. In: M. Apel, K.I. Hariri and F. Krupp (eds), Final report of phase III. Senckenberg Research Institute, Frankfurt a.M., Germany.
- Kenworthy, W.J. 2000. The role of sexual reproduction in maintaining populations of <i>Halophila decipiens</i>: implications for the biodiversity and conservation of tropical seagrass ecosystem. <i>Pacific Conservation Biology</i> 5: 260–268.
- Hemminga, M.A. and Duarte, C.M. 2000. <i>Seagrass Ecology</i>. Cambridge University Press, Cambridge.
- Lee Long, W.J., Coles, R.G. and McKenzie, L.J. 1996. Deepwater seagrass in Northeastern Australia - how deep, how meaningful? In: J. Kuo, R.C. Phillips, D.I. Walker and H. Kirkman (eds), Proceedings of an International Seagrass Biology Workshop. Rottenest Island, Western Australia.
- Kuo, J. and Kirkman, H. 1995. Short Communication: <i>Halophila decipiens</i> Ostenfeld in estuaries of southwestern Australia. <i>Aquatic Botany</i> 51: 335-340.
- Preen, A.R., Lee Long, W.J. and Coles, R.G. 1995. Flood and cyclone related loss, and partial recovery, of more than 1,000 km² of seagrass in Hervey Bay, Queensland, Australia. <i>Aquatic Botany</i> 52: 3-17.
- Kenworthy, W.J. 1993. Conservation and restoration of the seagrasses of the Gulf of Mexico through a better understanding of their minimum light requirements and factors controlling water transparency. In: H.A. Neckles (ed.), Seagrass Monitoring and research in the Gulf of Mexico – Draft report of a workshop held at Mote Marine Laboratory in Sarasota, Florida. Sarasota, FL.
- McMillan, C. 1988. Seed germination and seedling development of <i>Halophila decipiens</i> Ostenfeld (Hydrocharitaceae) from Panama. <i>Aquatic Botany</i> 31: 169-176.
- Iverson, R.L. and Bittaker, H.F. 1986. Seagrass distribution and abundance in eastern Gulf of Mexico coastal waters. <i>Estuarine, Coastal and Shelf Science</i> 22: 577-602.
- Cambridge, M.L. and McComb, A.J. 1984. The loss of seagrasses in Cockburn Sound, Western Australia. I. The time course and magnitude of seagrass decline in relation to industrial development. <i>Aquatic Botany</i> 20: 229-243.
- Zieman, J.C. 1982. The ecology of the seagrasses of South Florida: a community profile. <i>US Fish and Wildlife Service Biological Services Program</i> FWS/OBS-82/5: 150.
- Buesa, R.J. 1975. Population biomass and metabolic rates of marine angiosperms on the Northwestern Cuban Shelf. <i>Aquatic Botany</i> 1: 11-23.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C.
evaluator
Livingstone, S., Harwell, H. & Carpenter, K.E.
Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C. 2010. Halophila decipiens. The IUCN Red List of Threatened Species 2010: e.T173352A6997485. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (1)— redirigent vers cette page
- Halophila decipiens var. pubescensHartog
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).