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

Back to top

1.1 Type

B

1.2 Site code

SE0110377

1.3 Site name

Asknäsviken

1.4 First Compilation date

2002-10

1.5 Update date

-

1.6 Respondent:

Name/Organisation:Länsstyrelsen i Stockholms län
Address:               
Email:stockholm@lansstyrelsen.se
Date site proposed as SCI:2004-04
Date site confirmed as SCI:2005-01
Date site designated as SAC:2011-03
National legal reference of SAC designation:Governmental act M2010/4648/Nm

2. SITE LOCATION

Back to top

2.1 Site-centre location [decimal degrees]:

Longitude:17.761800
Latitude:59.272600

2.2 Area [ha]

19.8000

2.3 Marine area [%]

0.0000

2.4 Sitelength [km]:

0.00

2.6 Biogeographical Region(s)

Boreal (100.00 %)

3. ECOLOGICAL INFORMATION

Back to top

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.
P1940Alisma wahlenbergii    27000  27000     
  • 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
  • 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

Back to top

4.1 General site character

Habitat class % Cover
N0695.00
N074.00
N161.00

Total Habitat Cover

100

Other Site Characteristics

The site consists of a shallow inner part of a bay in Lake Mälaren, in near vicinity of several Stockholm suburbs. Most of the bay has clayey sediments, though the eastern part, adjacent to a glacifluvial esker, has extensive sand bottoms. An enclave in t

4.2 Quality and importance

This is the largest known population of Alisma wahlenbergi in Sweden, and as far as we know, in the world. The plant grows from a few decimetres in depth down to 4 meters. The individuals are very scattered over the site. Concentrations of indivuals mainl

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]
LE01o
LH01b
Positive Impacts
RankActivities, management [code]Pollution (optional) [code]inside/outside [i|o|b]
LA03i

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

4.5 Documentation

Småsvalting i Mälaren. Länsstyrelsen i Stockholms län, rapport 2001:07

5. SITE PROTECTION STATUS

Back to top

5.1 Designation types at national and regional level:

Code Cover [%]
SE00100.00

6. SITE MANAGEMENT

Back to top

6.1 Body(ies) responsible for the site management:

Organisation:Länsstyrelsen i Stockholms län
Address:
Email:stockholm@lansstyrelsen.se

6.2 Management Plan(s):

An actual management plan does exist:

X
Yes Name: Asknäsviken
Link: http://skyddadnatur.naturvardsverket.se/

No, but in preparation
No

 

7. MAP OF THE SITE

Back to top
INSPIRE ID:SE.SWEPA.SE0110377
Map delivered as PDF in electronic format (optional)
Yes
No

SITE DISPLAY