JP122
Lake Nakaumi


IBA Criteria

Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Tundra Swan Cygnus columbianus LC winter 2003 present A4i
Common Pochard Aythya ferina VU winter 2003 present A4i
Tufted Duck Aythya fuligula LC winter 2003 present A4i
Greater Scaup Aythya marila LC winter 2003 present A4i
A4iii Species group - waterbirds n/a winter 2003 50,000-75,000 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 medium near favourable high
Was the whole site covered? Yes State assessed by Habitat
Accuracy of information -

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Natural system modifications other ecosystem modifications happening now small area/few individuals (<10%) moderate to rapid deterioration low
Transportation and service corridors roads and railroads happening now some of area/population (10-49%) slow but significant deterioration medium

Condition of habitat (state)
Habitat Habitat Detail Reference Area (ha) Actual Area (ha) % of habitat remaining % of carrying capacity (overall) Result
Wetlands (inland) 0 0 good (> 90%) moderate (70-90%) near favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Most of site (50-90%) covered (including the most critical parts for important bird species) A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species The conservation measures needed for the site are being comprehensively and effectively implemented high
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Nakaumi 国指定鳥獣保護区 8,724 protected area overlaps with site 8,462
Nakaumi Ramsar Site, Wetland of International Importance 8,043 protected area contained by site 8,043
Nakaumi Prefectural Wildlife Protection Area 8,800 protected area contained by site 8,800

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Marine Coastal/Supratidal -
For further information about the habitat classification please click here.


Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Lake Nakaumi. Downloaded from http://www.birdlife.org on 02/12/2022.