| 词条 | Gretagrund |
| 释义 |
| name = Gretagrund | image_name = {{Location map |Baltic Sea |lat_dir=N |lon_dir=E |lat_deg=57|lat_min=44 |lon_deg=23|lon_min=18 |width=250 |float=right |mark=Cercle rouge 100%.svg |marksize=20 }} | image_caption = | locator_map = | locator_map_size = | map_caption = | location = Gulf of Riga | coordinates = {{coord|57|44|30|N|23|18|00|E|region:EE|display=inline,title}} | archipelago = | area_ha = | area_footnotes = | length_km = | length_footnotes = | width_km = | width_footnotes = | coastline_km = | coastline_footnotes = | elevation_m = | elevation_footnotes = | country = Estonia | country_admin_divisions_title = County | country_admin_divisions = Saare County | country_admin_divisions_title_1 = Municipality | country_admin_divisions_1 = Ruhnu Parish | country_admin_divisions_title_2 = Settlement | country_admin_divisions_2 = Ruhnu village | population = | population_as_of = | density_km2 = | density_footnotes = | website = }} Gretagrund (or Greta-Grund) is a shoal located a few km southeast of Ruhnu island in the Gulf of Riga, Estonia. Protected areaSince 12 August 2010 the {{convert|146.50|km2|sqmi acre|abbr=on}} water area was taken under protection as being a habitat for the following migratory birds: Black-throated loon (Gavia arctica), little gull (Larus minutus), red-throated loon (Gavia stellata), long-tailed duck (Clangula hyemalis), velvet scoter (Melanitta fusca) and razorbill (Alca torda).[1][2] During a survey in 2008, Paramysis intermedia (from Paramysis genus) was found in Gretagrund as a new species in the Baltic Sea.[3] References1. ^{{cite news|title=Gretagrundi hoiuala võetakse kaitse alla|url=http://uudised.err.ee/index.php?06212037|accessdate=9 August 2011|newspaper=ERR|date=12 August 2010|language=Estonian}} {{Saare-geo-stub}}2. ^{{cite web|title=Gretagrundi hoiuala|url=http://register.keskkonnainfo.ee/envreg/main?reg_kood=KLO2000344|publisher=Keskkonnaregister|accessdate=9 August 2011|language=Estonian}} 3. ^{{cite web|title=Mereala loodusväärtuste uuringu käigus leiti Ruhnu lähedalt uus liik|url=http://www.bioneer.ee/eluviis/kliima/article_id-3684|publisher=Bioneer|accessdate=9 August 2011|language=Estonian|date=17 February 2009}} 7 : Shoals of the Baltic Sea|Ruhnu|Protected areas of Estonia|Protected areas established in 2010|2010 establishments in Estonia|Landforms of Saare County|Landforms of Estonia |
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