Overview
Distribution
Localities documented in Tropicos sources
Zostera caulescens Miki:
Japan (Asia)
North Korea (Asia)
South Korea (Asia)
China (Asia)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
Japan (Asia)
North Korea (Asia)
South Korea (Asia)
China (Asia)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Flora of China Editorial Committee. 1988-2013. Fl. China Unpaginated. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
http://www.tropicos.org/Reference/42480
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Flora of China Editorial Committee. 2010. Fl. China 23: 1–515. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
http://www.tropicos.org/Reference/100001734
© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO 63110 USA
Source:
Missouri Botanical Garden
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Range Description
Zostera caulescens has a very limited distribution. It occurs in the northeast Pacific in northern China, South Korea and in central Japan (it may also be in North Korea). It has an extent of occurrence of near to 20,000 km², and is known from around 10 locations.
© International Union for Conservation of Nature and Natural Resources
Source:
IUCN
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
Zostera caulescens is found in both sheltered and semi-exposed bays on sandy or muddy bottoms in depths of 6-12 m along temperate sea coasts of northeastern Asia (Miki 1932, den Hartog 1970). It prefers deeper waters due to its tall growth. It is also found in Japan, in deeper habitats than Zostera marina, between 3-16 m (Aioi et al. 1998).
Zostera caulescens is believed to be the world's longest seagrass and was collected in lengths of up to seven m, with a typical length of 4.8 m in a bay of northeastern Japan. The flowering shoots are produced on a proliferation of vegetative leaves at the top of a stem. Flowering shoots take one year to mature and develop spadices, over-wintering in the bed.
Zostera caulescens is believed to be the world's longest seagrass and was collected in lengths of up to seven m, with a typical length of 4.8 m in a bay of northeastern Japan. The flowering shoots are produced on a proliferation of vegetative leaves at the top of a stem. Flowering shoots take one year to mature and develop spadices, over-wintering in the bed.
Systems
- Marine
© International Union for Conservation of Nature and Natural Resources
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IUCN
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Molecular Biology and Genetics
Molecular Biology
Barcode data: Zostera caulescens
The following is a representative barcode sequence, the centroid of all available sequences for this species.
No available public DNA sequences.
Download FASTA File
No available public DNA sequences.
Download FASTA File
© Barcode of Life Data Systems
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Statistics of barcoding coverage: Zostera caulescens
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
© Barcode of Life Data Systems
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
NT
Near Threatened
Red List Criteria
Version
3.1
Year Assessed
2010
Assessor/s
Short, F.T. & Waycott, M.
Reviewer/s
Livingstone, S., Harwell, H. & Carpenter, K.E.
Contributor/s
Justification
Zostera caulescens is found in North Korea and Japan, and possibly China. It has a very restricted range and the population is thought to be declining due to reduced water quality. This species is particularly sensitive to pollution. Habitat loss from coastal development and dredging is also a major threat. It prefers deeper waters due to its tall growth. The species almost reaches the threshold for Vulnerable as it has an extent of occurrence of near to 20,000 km², and is known from around 10 locations with a continuing decline in population and quality of habitat. This species is listed as Near Threatened. Further research is recommended for this species, as it may fall into a threatened category if more detailed information were available.
© International Union for Conservation of Nature and Natural Resources
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IUCN
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Trends
Population
Population
Population Trend
The population of Zostera caulescens is thought to be declining due to coastal pollution.
Population Trend
Decreasing
© International Union for Conservation of Nature and Natural Resources
Source:
IUCN
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Threats
Major Threats
Zostera caulescens is sensitive to pollution and reduced water quality is a particular threat. Habitat loss is also a major threat to this species, as is dredging.
Within its range in Japan there is industrial development in coastal regions, land reclamation, water pollution and disturbance of habitats by fish trawling. In South Korea there is a large amount of coastal eutrophication and some land reclamation.
Within its range in Japan there is industrial development in coastal regions, land reclamation, water pollution and disturbance of habitats by fish trawling. In South Korea there is a large amount of coastal eutrophication and some land reclamation.
© International Union for Conservation of Nature and Natural Resources
Source:
IUCN
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Management
Conservation Actions
Conservation Actions
The distribution of Zostera caulescens falls into protected areas in South Korea ( Environmental Conservation Areas or Special Coastal Management Areas). This species is also protected by 'The Marine Ecosystem Conservation and Management Act' in Korea.
Zostera caulescens is listed as Vulnerable (vulnerable stage) in the Red Data Book of threatened Japanese plant species (2000).
Further research on population and general biology of this species is recommended.
Zostera caulescens is listed as Vulnerable (vulnerable stage) in the Red Data Book of threatened Japanese plant species (2000).
Further research on population and general biology of this species is recommended.
© International Union for Conservation of Nature and Natural Resources
Source:
IUCN
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