Fact sheet for HELCOM MPA 149 - Isomatala-Maasyvänlahti

Isomatala - Maasyvälahti consists of very shallow sandbanks (approximately half of the area), traditional coastal meadows, muddy shallows, reeds and other open areas. The area had been heavily influenced by hay cutting and grazing until the 1950-60s. Now the meadows are grazed again to keep the area open. The coastal meadow is one of the largest in the Bothnian Bay and attracts thousands of migrating birds every spring and autumn. Itätörmän matalikko - Eastern Shallows is the second most important bird area in Finland. The area represents an extremely shallow (0-0,5 m) land upheaval area where large silty shallows are exposed at low water. Isomatala-Maasyvänlahti hosts the largest population of Hippuris tetraphylla in Europe and is also home to a large number of other threatened, endemic and Primula nutans group species as well.

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General information of MPA Isomatala-Maasyvänlahti, Finland

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Species in MPA Isomatala-Maasyvänlahti, Finland (hide / show)

Scientific nameAscending	English name	Species group	Species status	Does the species justify the site's designation as an MPA?	Performed monitoring	Authorities responsible for monitoring	HELCOM Red List category	Link to Species Information Sheet (SIS)	Link to WORMS
Alca torda	Razorbill	Birds	not reported	No	no monitoring program	not reported	-	SIS	WORMS
Alisma wahlenbergii	-	Macrophytes	not reported	Yes	occasional monitoring program	not reported	VU	SIS	WORMS
Anas clypeata	Shoveler	Birds	breeding	No	no monitoring program	not reported	-	SIS	WORMS
Anas strepera	Gadwall	Birds	breeding	No	no monitoring program	not reported	-	SIS	WORMS
Anser fabalis fabalis	Taiga bean goose	Birds	not reported	No	no monitoring program	not reported	EN	SIS	WORMS
Arenaria interpres	Ruddy turnstone	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Aythya marila	Greater scaup	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Branta leucopsis	Barnacle goose	Birds	not reported	No	no monitoring program	not reported	-	SIS	WORMS
Calidris alpina schinzii	Southern dunlin	Birds	breeding	No	no monitoring program	not reported	EN	SIS	WORMS
Calidris temminckii	Temminck's stint	Birds	breeding	No	no monitoring program	not reported	NT	SIS	WORMS
Chara sp.	-	Macrophytes	not reported	No	no monitoring program	not reported	-	SIS	WORMS
Coregonus albula	Vendace	Fish and lamprey species	resident	No	no monitoring program	not reported	LC	SIS	WORMS
Coregonus maraena	Maraene	Fish and lamprey species	resident	No	no monitoring program	not reported	EN	SIS	WORMS
Cottus gobio	Bullhead	Fish and lamprey species	resident	No	no monitoring program	not reported	LC	SIS	WORMS
Crassula aquatica	-	Macrophytes	not reported	No	no monitoring program	not reported	NT	SIS	WORMS
Gavia arctica	Black-throated diver	Birds	not reported	No	no monitoring program	not reported	CR	SIS	WORMS
Gavia stellata	Red-throated diver	Birds	not reported	No	no monitoring program	not reported	CR	SIS	WORMS
Haliaeetus albicilla	White-tailed sea-eagle	Birds	not reported	No	no monitoring program	not reported	-	SIS	WORMS
Hippuris tetraphylla	Fourleaf mare's tail	Macrophytes	not reported	Yes	occasional monitoring program	not reported	EN	SIS	WORMS
Hydroprogne caspia	Caspian tern	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Lampetra fluviatilis	River lamprey	Fish and lamprey species	migratory	No	no monitoring program	not reported	NT	SIS	WORMS
Larus fuscus fuscus	Lesser black-backed gull	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Limosa limosa limosa	Black-tailed godwit	Birds	not reported	No	no monitoring program	not reported	NT	SIS	WORMS
Lota lota	Burbot	Fish and lamprey species	breeding	No	no monitoring program	not reported	NT	SIS	WORMS
Melanitta fusca	Velvet scoter	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Melanitta nigra	Common scoter	Birds	not reported	No	no monitoring program	not reported	EN	SIS	WORMS
Pandion haliaetus	Osprey	Birds	not reported	No	no monitoring program	not reported	-	SIS	WORMS
Pelecus cultratus	Razor-fish	Fish and lamprey species	occasional	No	no monitoring program	not reported	LC	SIS	WORMS
Philomachus pugnax	Ruff	Birds	breeding	No	no monitoring program	not reported	VU	SIS	WORMS
Podiceps auritus	Horned grebe	Birds	breeding	No	no monitoring program	not reported	NT	SIS	WORMS
Podiceps grisegena	Red-necked grebe	Birds	breeding	No	no monitoring program	not reported	EN	SIS	WORMS
Polysticta stelleri	Steller's eider	Birds	occasional	No	no monitoring program	not reported	EN	SIS	WORMS
Salmo salar	Atlantic salmon	Fish and lamprey species	migratory	No	no monitoring program	not reported	VU	SIS	WORMS
Salmo trutta	Brown trout	Fish and lamprey species	not reported	No	no monitoring program	not reported	VU	SIS	WORMS
Sterna hirundo	Common tern	Birds	breeding	No	no monitoring program	not reported	-	SIS	WORMS
Sterna paradisaea	Arctic tern	Birds	breeding	No	no monitoring program	not reported	-	SIS	WORMS
Tadorna tadorna	Common shelduck	Birds	breeding	No	no monitoring program	not reported	LC	SIS	WORMS
Thymallus thymallus	Grayling	Fish and lamprey species	occasional	No	no monitoring program	not reported	CR	SIS	WORMS
Tringa totanus	Common redshank	Birds	breeding	No	no monitoring program	not reported	NT	SIS	WORMS
Xenus cinereus	Terek sandpiper	Birds	not reported	No	no monitoring program	not reported	EN	SIS	WORMS
Zoarces viviparus	Eelpout	Fish and lamprey species	occasional	No	no monitoring program	not reported	NT	SIS	WORMS

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Biotopes in MPA Isomatala-Maasyvänlahti, Finland

Biotope code	Biotope name (HUB or HELCOM 1998)	Does the biotope justify the site's designation as an MPA?	Performed monitoring	Authorities responsible for monitoring	HELCOM Red List category	Link to Biotope Information Sheet (BIS)
AA.A1C	Baltic photic rock and boulders characterized by perennial algae	No	no monitoring program	not reported	NE
AA.A1S	Baltic photic rock and boulders characterized by annual algae	No	no monitoring program	not reported	LC
AA.A1V	Baltic photic rock and boulders characterized by mixed epibenthic macrocommunity	No	no monitoring program	not reported	LC
AA.A2T	Baltic photic rock and boulders characterized by sparse epibenthic macrocommunity	No	no monitoring program	not reported	LC
AA.A2W	Baltic photic rock and boulders characterized by microphytobenthic organisms and grazing snails	No	no monitoring program	not reported	LC
AA.A4U	Baltic photic rock and boulders characterized by no macrocommunity	No	no monitoring program	not reported	LC
AA.H1A	Baltic photic muddy sediment characterized by emergent vegetation	No	no monitoring program	not reported	NE
AA.H1B	Baltic photic muddy sediment characterized by submerged rooted plants	No	no monitoring program	not reported	NE
AA.H1V	Baltic photic muddy sediment characterized by mixed epibenthic macrocommunity	No	no monitoring program	not reported	NE
AA.I1A	Baltic photic coarse sediment characterized by emergent vegetation	No	no monitoring program	not reported	NE
AA.I1B	Baltic photic coarse sediment characterized by submerged rooted plants	No	no monitoring program	not reported	NE
AA.I1C	Baltic photic coarse sediment characterized by perennial algae	No	no monitoring program	not reported	NE
AA.I1S	Baltic photic coarse sediment characterized by annual algae	No	no monitoring program	not reported	NE
AA.I1V	Baltic photic coarse sediment characterized by mixed epibenthic macrocommunity	No	no monitoring program	not reported	NE
AA.I2T	Baltic photic coarse sediment characterized by sparse epibenthic macrocommunity	No	no monitoring program	not reported	NE
AA.I2W	Baltic photic coarse sediment characterized by microphytobenthic organisms and grazing snails	No	no monitoring program	not reported	LC
AA.I4U	Baltic photic coarse sediment characterized by no macrocommunity	No	no monitoring program	not reported	LC
AA.J1A	Baltic photic sand characterized by emergent vegetation	No	no monitoring program	not reported	NE
AA.J1B	Baltic photic sand characterized by submerged rooted plants	No	no monitoring program	not reported	NE
AA.J1V	Baltic photic sand characterized by mixed epibenthic macrocommunity	No	no monitoring program	not reported	NE
AA.J4U	Baltic photic sand characterized by no macrocommunity	No	no monitoring program	not reported	LC
AA.M1A	Baltic photic mixed substrate characterized by emergent vegetation	No	no monitoring program	not reported	NE
AA.M1B	Baltic photic mixed substrate characterized by submerged rooted plants	No	no monitoring program	not reported	NE
AA.M1C	Baltic photic mixed substrate characterized by perennial algae	No	no monitoring program	not reported	NE
AA.M1I	Baltic photic mixed substrate characterized by epibenthic crustacea	No	no monitoring program	not reported	NE
AA.M1V	Baltic photic mixed substrate characterized by mixed epibenthic macrocommunity	No	no monitoring program	not reported	NE
AA.M2T	Baltic photic mixed substrate characterized by sparse epibenthic macrocommunity	No	no monitoring program	not reported	LC
AA.M2W	Baltic photic mixed substrate characterized by microphytobenthic organisms and grazing snails	No	no monitoring program	not reported	LC
AA.M4U	Baltic photic mixed substrate characterized by no macrocommunity	No	no monitoring program	not reported	LC
AC	Baltic Sea seasonal Ice	No	no monitoring program	not reported	VU	BIS
3.1	Spits/bars	No	no monitoring program	not reported
3.2.1	Sandy beaches	No	no monitoring program	not reported
3.2.2	Gravel and shingle beaches	No	no monitoring program	not reported
3.2.3	Boulder beaches	No	no monitoring program	not reported
3.7.1.1	Natural reed, rush and sedge stands	No	no monitoring program	not reported
3.7.2.2	Lower meadows	No	no monitoring program	not reported
3.7.4	Coastal bogs	No	no monitoring program	not reported

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Biotope complexes in MPA Isomatala-Maasyvänlahti, Finland.

Code (HD Annex 1)	Biotope complex name	Does the biotope complex justify the site's designation as an MPA?	Performed monitoring	Authorities responsible monitoring	HELCOM Red List category	Link to Biotope Complex Information Sheet (BIS)
7140	Transition mires and quaking bogs	Yes	not reported	not reported	-	-
9030	Natural forests of primary succession stages of landupheaval coast	Yes	not reported	not reported	-	-
91D0	Bog woodland	No	not reported	not reported	-	-
9050	Fennoscandian herb-rich forests with Picea abies	Yes	not reported	not reported	-	-
9080	Fennoscandian deciduous swamp woods	No	not reported	not reported	-	-
1110	Sandbanks which are slightly covered by sea water all the time	Yes	not reported	not reported	VU	BIS
1150	Coastal lagoons	Yes	not reported	not reported	EN	BIS
1220	Perennial vegetation of stony banks	Yes	not reported	not reported	-	-
1620	Boreal Baltic islets and small islands	Yes	not reported	not reported	NT	BIS
1630	Boreal Baltic coastal meadows	Yes	not reported	not reported	-	-

Management and regulated activities of MPA Isomatala-Maasyvänlahti, Finland

Pressure (list according to MSFD Annex III revision document, May 2015)	Inside or outside the MPA	Intensity (low, medium, high)	Past, current or potential future pressure
Input of sound	inside	high	past,current,potential future
Input of nutrients and organic matter	inside	medium	past,current,potential future
Input of nutrients and organic matter	outside	medium	past,current,potential future
Input of contaminants (synthetic substances, non-synthetic substances, radionuclides) - diffuse sources, point sources, acute events	outside	low	past,current,potential future
Input of CO2 [and other greenhouse gases]	inside	medium	past,current,potential future
Input of litter (solid waste matter, including micro-size litter)	inside	medium	past,current,potential future
Extraction or, mortality/injury to, species (targeted, non-targeted)	inside	medium	past,current,potential future
Extraction or, mortality/injury to, species (targeted, non-targeted)	outside	medium	past,current,potential future
Disturbance of species	inside	high	past,current,potential future
Introduction or spread of non-indigenous species	inside	medium	current,potential future