Skip the menu

MOE home > Nature and Parks > EBSA home > Coastal Area > 12002 Adjacent waters of Naka River mouth


Coastal Area 12002 Adjacent waters of Naka River mouth

Basic Information A separate window opensReferences

Relevant municipalities Hitachinaka, Oarai, Ibaraki Prefecture
Area (km2) 22

Reason(s) for selection A separate window opensCriteria

Selected due to high levels for the criteria 2 and selected by MARXAN software.

Characteristics A separate window opensReferences

These are the coastal waters of the sea extending in front of Nakaminato Port, including Oarai, Hiraiso, and Ajigaura. Phyllospadix japonicus grows at Oarai and Hiraiso. In addition, seaweed communities, mainly of kombu kelp and Sargassum fulvellum, extend in the waters of Oarai and Ajigaura (Ministry of the Environment, 2001).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 1
Moba (seaweed bed) (km2) 0.6
Coral reef coverage (km2)
Natural coast (km) 0.7
Rate of natural coast (%) 3.7
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
Callorthinus ursinus (Northern Fur Seal)
Phoca largha (Larga Seal (Spotted Seal))
Riparia riparia (Sand Martin)
<Bivalva, Gastropoda>
Corbicula japonica
Criteria 2
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Phalacrocorax capillatus (Japanese Cormorant)
Phalacrocorax capillatus (Japanese Cormorant)[Br/Ne]
Larus crassirostris (Black-tailed Gull)
Larus crassirostris (Black-tailed Gull)[Br/Ne]
Larus schistisagus (Slaty-backed Gull)
Larus schistisagus (Slaty-backed Gull)[Br/Ne]
Egretta sacra (Pacific Reef-egret)[Br/Ne]
Sterna albifrons (Little Tern)
Sterna albifrons (Little Tern)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Riparia riparia (Sand Martin)[Br/Ne]
Larus hyperboreus (Glaucous Gull)
Charadrius alexandrinus (Kentish Plover)[Br/Ne]
Larus argentatus (European Herring Gull)
Rissa tridactyla (Black-legged Kittiwake)
Larus ridibundus (Black-headed Gull)
Tanakius kitaharae (Willowy flounder)[Sp]
Loligo bleekeri (Spear squid)
Criteria 3
Podiceps cristatus (Great Crested Grebe)
Sterna albifrons (Little Tern)
Histrionicus histrionicus (Harlequin Duck)
Anguilla japonica (Japanese eel)
Leucopsarion petersii (Ice goby )
Cicindela laetescripta
<Bivalva, Gastropoda>
Littorina brevicula
Potamocorbula amurensis
Criteria 7
Luciogobius guttatus (Flat-headed goby)
Gastersosteus aculeatus aculeatus (Three-spined stickleback)
<Bivalva, Gastropoda>
Corbicula japonica
<Vascular Plants>
Carex rugulosa

* This is the species list of which meet the criteria. In that matter, this list does not include all species that inhabit the individual area.
Abbreviation in the information is as follows.
[Br/Ne] : Adjacent water of breeding area or nesting site
[Sp] : spawning area
[Ad] : species not used for analysis but add to the list because inhabit information was collected later
[Ex] : species used for analysis but considered to be possibly extinct in the EBSA region (area)
No mark : data of species distribution


Back to the top of this page