Skip the menu

MOE home > Nature and Parks > EBSA home > Coastal Area > 14102 Adjacent waters of Onogawa and Nyukawa river mouths


Coastal Area 14102 Adjacent waters of Onogawa and Nyukawa river mouths

Basic Information A separate window opensReferences

Relevant municipalities Oita, Oita Prefecture
Area (km2) 16

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 waters in the vicinity of the mouths of the Onogawa and Nyukawa Rivers in Beppu Bay. In the river mouth areas, tidal mud flats unfold (most of which now are artificial due to progressive development of ports and other facilities). They include breeding grounds of multiple bird species. The rare species Pyropia tenera (designated an endangered species by the Ministry of the Environment) has been confirmed to inhabit the areas of the Egawa and Honda river mouths (Ito et al., 2014).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 3
Moba (seaweed bed) (km2)
Coral reef coverage (km2)
Natural coast (km) 0.8
Rate of natural coast (%) 2.8
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
Tadorna tadorna (Common Shelduck)
<Bivalva, Gastropoda>
Angustassiminea castanea
Criteria 2
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Phalacrocorax capillatus (Japanese Cormorant)
Phalacrocorax capillatus (Japanese Cormorant)[Br/Ne]
Synthliboramphus antiquus (Ancient Murrelet)
Synthliboramphus antiquus (Ancient Murrelet)[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]
Phalacrocorax carbo (Great Cormorant)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Larus argentatus (European Herring Gull)
Chlidonias leucopterus (White-winged Tern)
Falco peregrinus (Peregrine Falcon)[Br/Ne]
Phalacrocorax pelagicus (Pelagic Cormorant)
Phalacrocorax pelagicus (Pelagic Cormorant)[Br/Ne]
Pandion haliaetus (Osprey)[Br/Ne]
Ammodytes personatus (Japanese sand lance)[Sp]
Pagrus major (Red seabream)[Sp]
Criteria 3
Synthliboramphus antiquus (Ancient Murrelet)
Podiceps cristatus (Great Crested Grebe)
Histrionicus histrionicus (Harlequin Duck)
Phalacrocorax pelagicus (Pelagic Cormorant)
Callogobius sp.
Criteria 7
Luciogobius guttatus (Flat-headed goby)
<Bivalva, Gastropoda>
Truncatella pfeifferi
<Vascular Plants>
Triglochin asiaticum
Artemisia fukudo

* 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