Data Zone
The site was identified as internationally important for bird conservation in 2000 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 |
|---|---|---|---|---|
| Whooper Swan Cygnus cygnus | LC | passage (1996) | 400–500 birds | B1i, C2 |
| Smew Mergellus albellus | LC | passage (1996) | 200–250 birds | A4i, B1i, C2 |
| Goosander Mergus merganser | LC | passage (1996) | 3,000–3,500 birds | A4i, B1i, C3 |
| Common Reed-warbler Acrocephalus scirpaceus | LC | breeding (1996) | 90–130 pairs | B3 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | very poor | high | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | medium | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Whooper Swan Cygnus cygnus | 200 / 200 (birds) | 100 | good | ||
| Smew Mergellus albellus | 130 / 200 (birds) | 65 | poor | ||
| Goosander Mergus merganser | 400 / 3,000 (birds) | 14 | very poor | ||
| Common Reed-warbler Acrocephalus scirpaceus | 90 / 90 (pairs) | 100 | 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%) | moderate decline (10–30% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Most of area (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 | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | medium |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| - | Porvoonjoki Delta | Baltic Sea Protected Area (Helcom) (UA) | 85 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | 95 | |
| Grassland | 5 | Alpine, subalpine and boreal grassland |
| Land use | % of IBA |
|---|---|
| tourism/recreation | 70 |
| urban/industrial/transport | 20 |
| not utilised | 10 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Porvoonjoki Delta (Finland). Downloaded from
https://datazone.birdlife.org/site/factsheet/porvoonjoki-delta-iba-finland on 23/12/2024.