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Location Finland, Länsi-Suomen lääni
Central coordinates 21o 36.00' East  61o 32.00' North
IBA criteria A4i, A4iii, B1i, B2, B3, C2, C3, C4, C6
Area 15,441 ha
Altitude
Year of IBA assessment 2000

BirdLife SUOMI-FINLAND



Site description A very large and outstanding habitat complex of archipelago, sea bays, river mouths, lagoons and eutrophic lakes at the delta of the Kokemäki river. Large areas of meadow, marsh and deciduous forest on shores considerably increase the diversity of the avifauna. Fishing, boating and hunting are common in some parts of the site.

Key Biodiversity One of the most important wetlands in the country for breeding and staging waterbirds, including some of the largest breeding populations in Finland of Podiceps auritus (29 pairs), Botaurus stellaris, Aythya ferina, Circus aeruginosus (16 pairs), Fulica atra (405 pairs), Calidris alpina schinzii (25 pairs), Larus minutus, Acrocephalus scirpaceus and Panurus biarmicus (80 pairs). The site is also an important staging area for several species, including nationally important numbers of Cygnus olor (1,200 individuals), Branta canadensis (1,500 individuals), Tadorna tadorna (300 individuals), Charadrius hiaticula (1,500 individuals), Limicola falcinellus (300 individuals) and Calidris temminckii (300 individuals). Species of global conservation concern that do not meet IBA criteria: Anser erythropus (max. 8 individuals, passage), Polysticta stelleri (max. 30 individuals irregularly occur on passage), Haliaeetus albicilla (4 pairs breeding, 12 birds on passage, 6 birds wintering), Aquila clanga (max. 2 individuals, passage).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta passage  1997  1,500 individuals  medium  B1i, C3  Least Concern 
Bean Goose Anser fabalis passage  1997  3,500 individuals  medium  B1i, C3  Least Concern 
Greylag Goose Anser anser breeding  1997  69 breeding pairs  medium  B1i, C3  Least Concern 
Greylag Goose Anser anser passage  1997  1,000 individuals  medium  B1i, C3  Least Concern 
Whooper Swan Cygnus cygnus passage  1997  3,000 individuals  medium  A4i, B1i, C2  Least Concern 
Northern Shoveler Spatula clypeata passage  1997  500 individuals  medium  B1i, C3  Least Concern 
Common Teal Anas crecca passage  1997  4,000 individuals  medium  B1i, C3  Least Concern 
Common Pochard Aythya ferina breeding  1997  210 breeding pairs  medium  B3  Least Concern 
Common Pochard Aythya ferina passage  1997  2,500 individuals  medium  B3  Least Concern 
Common Goldeneye Bucephala clangula passage  1997  12,000 individuals  medium  A4i, B1i, C3  Least Concern 
Goosander Mergus merganser passage  1997  3,000 individuals  medium  A4i, B1i, C3  Least Concern 
Eurasian Bittern Botaurus stellaris breeding  1997  14 breeding pairs  good  B2, C6  Least Concern 
Circus cyaneus breeding  1997  20 breeding pairs  medium  B2  Not Recognised 
Corncrake Crex crex breeding  1997  2-12 breeding pairs  medium  B2, C6  Least Concern 
Spotted Crake Porzana porzana breeding  1997  25 breeding pairs  medium  B3, C6  Least Concern 
Common Crane Grus grus passage  1997  1,200 individuals  medium  B1i, C2  Least Concern 
Common Redshank Tringa totanus breeding  1997  120 breeding pairs  medium  B2  Least Concern 
Common Redshank Tringa totanus passage  1997  300 individuals  medium  B2  Least Concern 
Spotted Redshank Tringa erythropus passage  1997  1,000 individuals  medium  A4i, B1i, C3  Least Concern 
Mew Gull Larus canus breeding  1997  897 breeding pairs  medium  B2  Least Concern 
Little Gull Hydrocoloeus minutus breeding  1997  228 breeding pairs  medium  B1i, B2, C3  Least Concern 
Caspian Tern Hydroprogne caspia passage  1997  130 individuals  good  B1i, C2  Least Concern 
Sedge Warbler Acrocephalus schoenobaenus breeding  1997  2,500 breeding pairs  medium  B3  Least Concern 
Eurasian Reed-warbler Acrocephalus scirpaceus breeding  1997  600 breeding pairs  medium  B3  Least Concern 
Thrush Nightingale Luscinia luscinia breeding  1997  180 breeding pairs  medium  B3  Least Concern 
A4iii Species group - waterbirds passage  1997  20,000-49,999 individuals  unknown  A4iii, C4   

IBA Monitoring

2010 medium very unfavourable low
Population
Good - based on reliable and complete / representative data

Energy production and mining renewable energy likely in long term (beyond 4 years) some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) no or imperceptible deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - unspecified species happening now some of area/population (10-49%) no or imperceptible deterioration low
Pollution agricultural & forestry effluents - type unknown/unrecorded happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development commercial and industrial development happening now small area/few individuals (<10%) slow but significant deterioration low

Anas acuta Northern Pintail 1500 450 individuals 30 very unfavourable
Anser fabalis Bean Goose 3500 1100 individuals 32 very unfavourable
Anser anser Greylag Goose 1000 1000 individuals 100 favourable
Cygnus cygnus Whooper Swan 1800 2200 individuals 100 favourable
Anas crecca Common Teal 4000 4000 individuals 100 favourable
Aythya ferina Common Pochard 2500 100 individuals 4 very unfavourable
Aythya ferina Common Pochard 210 90 breeding pairs 43 unfavourable
Bucephala clangula Common Goldeneye 12000 4000 individuals 34 very unfavourable
Mergus merganser Goosander 3000 1800 individuals 60 unfavourable
Tringa totanus Common Redshank 120 55 breeding pairs 46 unfavourable
Tringa erythropus Spotted Redshank 1000 200 individuals 20 very unfavourable
Larus canus Mew Gull 900 900 breeding pairs 100 favourable
Hydrocoloeus minutus Little Gull 225 55 breeding pairs 25 very unfavourable
Hydroprogne caspia Caspian Tern 130 130 individuals 100 favourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  No management plan exists but the management planning process has begun  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Enäjärven luonnonsuojelualue Private Nature Reserve 10 unknown 0  
Halssin Lehdon luonnonsuojelualue Private Nature Reserve 7 unknown 0  
Herrainpäivien Lehto (ls.alue.) Private Nature Reserve 17 unknown 0  
Kokemäenjoen suisto - FI0200079 Birds Directive 2,885 protected area contained by site 2,885  
Kokemäensaaren luonnonsuojelualue Private Nature Reserve 115 unknown 0  
Kuuminaistenniemi - FI0200081 Habitats Directive 274 protected area overlaps with site 257  
Leveäkarin -Riitsaranlahden luonnonsuojelualue Private Nature Reserve 33 unknown 0  
Pooskerin saaristo - FI0200076 Birds Directive 3,151 protected area overlaps with site 310  
Preiviikinlahti - FI0200080 Habitats Directive 5,552 protected area contained by site 5,552  
Preiviikinlahti (SPA) - FI0200151 Birds Directive 4,612 protected area contained by site 4,612  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons  -
Sea   -
Coastline Sea cliffs and rocky shores  -

Land use

Land-use Extent (% of site)
nature conservation and research -
water management -
fisheries/aquaculture -
tourism/recreation -
hunting -

Protection status National Low International Partial141 ha of IBA covered by Protected Area on Private Lands (Herrainpäivä, 16 ha; Enäjärvi, 12 ha; Leveäkari-Riistalanlanti, 13 ha; Halssi, 6 ha; Kokemäensaaret, 117 ha). 8,993 ha of IBA covered by two Special Protection Areas (Kokemäenjoensuisto; Preiviikinlahti).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Pori archipelago and wetlands. Downloaded from http://www.birdlife.org on 29/12/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife