Data Zone
The site was identified as internationally important for bird conservation in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Marsh Grassbird Helopsaltes pryeri | NT | breeding (2003) | present | A1, A3 |
| Ochre-rumped Bunting Emberiza yessoensis | NT | breeding (2003) | present | A3 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | good | low | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Coastal/Supratidal | good (>90%) | good (>90%) | good |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Energy production and mining | likely in short term (<4 years) | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | No management planning has taken place | Some limited conservation initiatives are in place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1965 | Jusanko | 都道府県指定鳥獣保護区 (IV) | 92 |
| 1975 | Tsugaru | 国定公園 (V) | 86 |
| 1986 | Iwakigawa kako | 都道府県指定鳥獣保護区 (IV) | 9 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | major (>10) | |
| Marine Intertidal | major (>10) | |
| Marine Neritic | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Iwakigawa river, Lake Jusanko (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/iwakigawa-river-lake-jusanko-iba-japan on 23/12/2024.