Data Zone
The site was identified as internationally important for bird conservation in 2012 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 |
|---|---|---|---|---|
| Red-tailed Tropicbird Phaethon rubricauda | LC | breeding (1973–2007) | 6,500 birds | A4ii |
| Brown Noddy Anous stolidus | LC | breeding (1973–2007) | 17,000 birds | A4i |
| Sooty Tern Onychoprion fuscatus | LC | breeding (1973–2007) | 360,000 birds | A4i |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2012. The most recent assessment (2012) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2012 | good | high | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | poor | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Neritic | good (>90%) | good (>90%) | good |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Pollution | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Climate change and severe weather | likely in long term (>4 years) | some of population/area (10–49%) | 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 |
| Little/none of area covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | very low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1926 | Johnston Atoll | National Wildlife Refuge (IV) | 8 |
| 1926 | Johnston Island | National Wildlife Refuge (Ia) | <1 |
| 2009 | Pacific Remote Islands | Marine National Monument (V) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Neritic | 100 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Johnston Atoll Marine (United States Minor Outlying Islands (to USA)). Downloaded from
https://datazone.birdlife.org/site/factsheet/johnston-atoll-marine-iba-united-states-minor-outlying-islands-(to-usa) on 27/12/2024.