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The site was identified as internationally important for bird conservation in 2016 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
Barnacle Goose Branta leucopsis	LC	breeding (2011–2015)	536–600 pairs	B3, C6
Common Pochard Aythya ferina	VU	non-breeding (2011–2015)	2,467 birds	A1, C1
Common Pochard Aythya ferina	VU	winter (2011–2015)	1,269 birds	B2
Gadwall Mareca strepera	LC	non-breeding (2011–2015)	1,564–3,981 birds	B1i, C3
Eurasian Spoonbill Platalea leucorodia	LC	breeding (2011–2015)	133–187 pairs	B1i, B3, C2, C6
Kentish Plover Charadrius alexandrinus	LC	breeding (2011–2015)	8–21 pairs	C6

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2016. The most recent assessment (2017) is shown below.

State (condition of the trigger species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Gadwall Mareca strepera	1,564 / 280 (birds)	100	good
Eurasian Spoonbill Platalea leucorodia	133 / 20 (pairs)	100	good
Kentish Plover Charadrius alexandrinus	8 / 220 (pairs)	4	very poor

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Pollution	happe­ning now	most of popul­ation/area (50–90%)	rapid decline (>30% over 3 gener­ations)	very high

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	A compre­hensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Very little or no conservation action taking place	medium

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Molenplaat	Nature Reserve (-)	6
1982	Markiezaatsmeer-Zuid II	Natural Monument (-)	9
1985	Markiezaatsmeer Zuid	Natural Monument (-)	93
2010	Markiezaat	Natuurbeschermingswet (IV)	100

Habitat	% of IBA	Habitat detail
Marine Coastal/Supratidal	82
Artificial/Terrestrial	18	Highly improved re-seeded landscapes

Land use	% of IBA
nature conservation and research	92
agriculture	10
hunting	10

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Markiezaat (Netherlands). Downloaded from https://datazone.birdlife.org/site/factsheet/markiezaat-iba-netherlands on 25/12/2024.