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Phyllospadix scouleri

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA LILIOPSIDA NAJADALES ZOSTERACEAE

Scientific Name: Phyllospadix scouleri
Species Authority: Hook.
Common Name(s):
English Surf Grass, Species code: Ps

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2007-10-23
Assessor(s): Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C.
Reviewer(s): Livingstone, S., Harwell, H. & Carpenter, K.E.
Justification:
This is a common species within suitable habitat and the population status is thought to be stable. There are no major threats although there are some localized declines due to coastal development and mechanical damage and the species is slow to recover from damage. This species is listed as Least Concern.

Geographic Range [top]

Range Description: Phyllospadix scouleri occurs in the Pacific from Southeast Alaska to the tip of Baja California and Mexico.
Countries:
Native:
Canada; Mexico; United States
FAO Marine Fishing Areas:
Native:
Pacific – eastern central; Pacific – northeast
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This is a common species in suitable substrate. The population status is thought to be stable.
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: Along the Pacific coast of North America, this species inhabits the lower intertidal and shallow subtidal zone (Green and Short 2003). Phyllospadix spp. grow on rocky substrates in regions with high wave exposure (Hemminga and Duarte 2000).

Surfgrass (Phyllospadix spp.) are not found where sea surface temperatures exceed 21°C in winter or 27°C in the summer. Surfgrass has a low tolerance to higher temperatures which suggests that populations in Baja California Sur might be impacted by global climate change. Phyllospadix scouleri is distributed higher in the lower intertidal and upper subtidal zones than P. torreyi (Ramirez-Garcia et al. 2002).

Phyllospadix scouleri dominates space and persists through all seasons without serious damage by disturbances such as storm waves. This species is long-lived and persistent and may preempt space, preventing other species from invading. This species is slow to recover after removal (Turner 1985).
Systems: Marine

Threats [top]

Major Threat(s): There are no major threats to this species. Localized threats include coastal development and modifications and over-water structures in the form of ferry terminals, commercial docks. Mechanical damage from boats and dredging is also a minor localized threat.

Conservation Actions [top]

Conservation Actions: There are no known species-specific conservation measures for this species. It is not clear if the federal, provincial or state, or local administrative laws and ordinances recognize this species in the Northeast Pacific (Green and Short 2003).

Citation: Short, F.T., Carruthers, T.J.R., Waycott, M., Kendrick, G.A., Fourqurean, J.W., Callabine, A., Kenworthy, W.J. & Dennison, W.C. 2010. Phyllospadix scouleri. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 28 July 2014.
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