Database release:
SDF
NATURA 2000 - STANDARD DATA FORM

For Special Protection Areas (SPA),
Proposed Sites for Community Importance (pSCI),
Sites of Community Importance (SCI) and
for Special Areas of Conservation (SAC)

TABLE OF CONTENTS

1. SITE IDENTIFICATION

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1.1 Type

A

1.2 Site code

ES0000254

1.3 Site name

Illa de Ons

1.4 First Compilation date

2000-09

1.5 Update date

2016-11

1.6 Respondent:

Name/Organisation:Dirección Xeral de Conservación da Natureza Consellería de Medio Ambiente e Ordenación do Territorio Xunta de Galicia
Address:               
Email:dxcn.cmati@xunta.es

1.7 Site indication and designation / classification dates

Date site classified as SPA:2001-04
National legal reference of SPA designationAcuerdo del Consejo de la Xunta de Galicia de 19 de abril de 2001.

2. SITE LOCATION

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2.1 Site-centre location [decimal degrees]:

Longitude:-8.936700
Latitude:42.374000

2.2 Area [ha]

923.8000

2.3 Marine area [%]

0.0000

2.4 Sitelength [km]:

0.00

2.5 Administrative region code and name

NUTS level 2 code Region Name
ES11Galicia

2.6 Biogeographical Region(s)

Atlantic (47.00 %) Marine Atlantic (53.00 %)

3. ECOLOGICAL INFORMATION

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3.1 Habitat types present on the site and assessment for them

Annex I Habitat types Site assessment
Code PF NP Cover [ha] Cave [number] Data quality A|B|C|D A|B|C
      RepresentativityRelative SurfaceConservationGlobal
1110  info      457.39  0.00 
1140  info      460.79  0.00 
1160  info      457.39  0.00 
1170  info      492.05  0.00 
1210  info      0.56  0.00 
1230  info      71.2  0.00 
2110  info      0.5  0.00 
2120  info      0.71  0.00 
2130  info      0.76  0.00 
2230  info      0.5  0.00 
2260  info      0.5  0.00 
4030  info      311.08  0.00 
6220  info      3.52  0.00 
6410  info      0.5  0.00 
6430  info      0.5  0.00 
6510  info      4.37  0.00 
8220  info      3.41  0.00 
8230  info      53.23  0.00 
8310  info      3.12  0.00 
8330  info      0.53  0.00 
91E0  info      1.5  0.00 
  • PF: for the habitat types that can have a non-priority as well as a priority form (6210, 7130, 9430) enter "X" in the column PF to indicate the priority form.
  • NP: in case that a habitat type no longer exists in the site enter: x (optional)
  • Cover: decimal values can be entered
  • Caves: for habitat types 8310, 8330 (caves) enter the number of caves if estimated surface is not available.
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation)

3.2 Species referred to in Article 4 of Directive 2009/147/EC and listed in Annex II of Directive 92/43/EEC and site evaluation for them

Species Population in the site Site assessment
G Code Scientific Name S NP T Size Unit Cat. D.qual. A|B|C|D A|B|C
      MinMax  Pop.Con.Iso.Glo.
BA228Apus melba    10     
BA010Calonectris diomedea    50       
BA224Caprimulgus europaeus           
BA082Circus cyaneus           
A1194Discoglossus galganoi           
BA014Hydrobates pelagicus           
BA341Lanius senator           
BA459Larus cachinnans    1600       
BA246Lullula arborea           
BA018Phalacrocorax aristotelis    557  557     
BA017Phalacrocorax carbo    400       
BA391Phalacrocorax carbo sinensis    25       
M1351Phocoena phocoena           
BA274Phoenicurus phoenicurus           
BA384Puffinus puffinus mauretanicus    500       
BA346Pyrrhocorax pyrrhocorax       
P1441Rumex rupestris    10     
BA302Sylvia undata           
M1349Tursiops truncatus           
BA199Uria aalge    25       
  • Group: A = Amphibians, B = Birds, F = Fish, I = Invertebrates, M = Mammals, P = Plants, R = Reptiles
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Type: p = permanent, r = reproducing, c = concentration, w = wintering (for plant and non-migratory species use permanent)
  • Unit: i = individuals, p = pairs or other units according to the Standard list of population units and codes in accordance with Article 12 and 17 reporting (see reference portal)
  • Abundance categories (Cat.): C = common, R = rare, V = very rare, P = present - to fill if data are deficient (DD) or in addition to population size information
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation); VP = 'Very poor' (use this category only, if not even a rough estimation of the population size can be made, in this case the fields for population size can remain empty, but the field "Abundance categories" has to be filled in)

3.3 Other important species of flora and fauna (optional)

Species

Population in the site

Motivation

Group CODE Scientific Name S NP Size Unit Cat. Species Annex Other categories
     MinMax C|R|V|PIVVABCD
Angelyca pachycarpa                   
Anguis fragilis                   
Armeria pubigera pubigera                   
Asplenium marinum                   
Calendula suffruticosa                   
Chalcides bedriagai                   
Chalcides striatus                   
Coronella girondica                   
Cytisus atlanticus                   
Discoglossus galganoi                   
Elaphe scalaris                   
Helichrysum picardii                   
Iberis procumbens procumbens                   
Leucanthemum merinoi                   
Linaria arenaria                   
Linaria polygalifolia polygalifolia                   
Mibora minima littorea                   
Natrix maura                   
Natrix natrix                   
Rumex acetosa biformis                   
Salamandra salamandra                   
Scilla merinoi                   
Triturus boscai                   
Ulex europaeus latebracteatus                   
  • Group: A = Amphibians, B = Birds, F = Fish, Fu = Fungi, I = Invertebrates, L = Lichens, M = Mammals, P = Plants, R = Reptiles
  • CODE: for Birds, Annex IV and V species the code as provided in the reference portal should be used in addition to the scientific name
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Unit: i = individuals, p = pairs or other units according to the standard list of population units and codes in accordance with Article 12 and 17 reporting, (see reference portal)
  • Cat.: Abundance categories: C = common, R = rare, V = very rare, P = present
  • Motivation categories: IV, V: Annex Species (Habitats Directive), A: National Red List data; B: Endemics; C: International Conventions; D: other reasons

4. SITE DESCRIPTION

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4.1 General site character

Habitat class % Cover
N0150.00
N041.00
N0849.00

Total Habitat Cover

100

Other Site Characteristics

El archipiélago de Ons (islas de Ons y Onza) presenta extensas superficies cubiertas por brezal-tojal que incluyen las siguientes comunidades: Daboecion cantabricae, Ulici europaei-Ericetum cinereae, Sileno maritimae-Ulicetum humilis. En la isla de Ons se mantienen áreas con cultivos agrícolas trasdicionales y pequeñas huertas.

4.2 Quality and importance

En estas islas se localizan importantes colonias de Cormorán Moñudo (Phalacrocorax aristotelis) con 557p y de Gaviota Patiamarilla (Larus cachinnans) con 1.600p. Las aguas que rodean a las islas registran la presencia de grupos de Delfín Mular (Tursiops truncatus) y Marsopa (Phocoena phocoena). En los cantiles se encuentran especies singulares de gran interés botánico, entre las que se incluyen endemismos y otras especies características de estos medios como el helecho Asplenium marinum.

4.3 Threats, pressures and activities with impacts on the site

The most important impacts and activities with high effect on the site

Negative Impacts
RankThreats and pressures [code]Pollution (optional) [code]inside/outside [i|o|b]
LA01i
ME01.02i
MF02.02i
LF02.03i
Positive Impacts
RankActivities, management [code]Pollution (optional) [code]inside/outside [i|o|b]
LA01i
MF03.02.04i
HG01.02i
MG02.09i

Rank: H = high, M = medium, L = low
Pollution: N = Nitrogen input, P = Phosphor/Phosphate input, A = Acid input/acidification,
T = toxic inorganic chemicals, O = toxic organic chemicals, X = Mixed pollutions
i = inside, o = outside, b = both

5. SITE PROTECTION STATUS

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5.1 Designation types at national and regional level:

Code Cover [%]
ES09100.00
ES17100.00

5.2 Relation of the described site with other sites:

Designated at national or regional level:

Type code Site name Type Cover [%]
ES17Illa de Ons=100.00
ES09Marítimo-terrestre de las Islas Atlánticas de Galicia-100.00

Designated at international level:

Type Site name Type Cover [%]
Other Illa de Ons=100.00
Marítimo-terrestre de las Islas Atlánticas de Galicia-100.00

5.3 Site designation (optional)

Refugio de Fauna PO-2. Área Importante para las Aves (SEO/BirdLife): IBA 002 Islas Ons.

6. SITE MANAGEMENT

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6.1 Body(ies) responsible for the site management:

Organisation:Dirección Xeral de Conservación da Natureza Consellería de Medio Ambiente e Ordenación do Territorio Xunta de Galicia
Address:
Email:dxcn.cmati@xunta.es

6.2 Management Plan(s):

An actual management plan does exist:

X
Yes Name: Plan director de la Red Natura 2000 de Galicia
Link: http://www.cmati.xunta.es/seccion-tema/c/Conservacion?content=Direccion_Xeral_Conservacion_Natureza/Espazos_protexidos/seccion.html&sub=Rede_natura_2000/

No, but in preparation
No

6.3 Conservation measures (optional)

Plan de Ordenación de los Recursos Naturales (Parque Nacional de las Islas Atlánticas). Plan General de Explotación Marisquera (de carácter anual y publicado por la Consellería de Pesca e Asuntos Marítimos).

 

7. MAP OF THE SITE

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SITE DISPLAY