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

B

1.2 Site code

SE0110031

1.3 Site name

Svalgarn

1.4 First Compilation date

1995-11

1.5 Update date

2009-04

1.6 Respondent:

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

1.7 Site indication and designation / classification dates

Date site proposed as SCI:1995-12
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

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2.1 Site-centre location [decimal degrees]:

Longitude:17.506400
Latitude:59.509800

2.2 Area [ha]

24.8000

2.3 Marine area [%]


No information provided

2.4 Sitelength [km] (optional):


No information provided

2.5 Administrative region code and name


No information provided

2.6 Biogeographical Region(s)

Boreal (100.00 %)

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
9010  info      19.84  0.00  M  B  C  A  B 
  • 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


No species are reported for the site

3.3 Other important species of flora and fauna (optional)


No information provided

4. SITE DESCRIPTION

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4.1 General site character

Habitat class % Cover
N155.00
N161.00
N1782.00
N1912.00

Total Habitat Cover

100

Other Site Characteristics

The site is an island in lake Mälaren. The bedrock is dominated by gneiss. Sandy till with coarse silt and a surface layer of wave-washed till is the dominating soil type on this site. Flat rocks are common along the shoreline. The northern part of the island is characterized by clay soils. Coniferous forest characterizes the vegetation. Although cattle has been grazing on the island and a small part of the northern point has been cultivated, the forest can be considered as primeval. Logs, trunks and up to 500 years old trees are not uncommon in this area.

4.2 Quality and importance

Although cattle has been grazing on the island and a small part of the northern point has been cultivated, the forest can be considered as primeval. Logs, trunks and up to 500 years old trees are not uncommon in this area. The cryptogam flora and the invertebrate fauna on the island is exceptionally rich. One of the fungi species on dead wood that have been identified on the island are not found anywhere else in Europe. One of the reasons to include the species listed in section 3.3 with motivation D is that they are considered to be keyspecies when identifying sites of conservation interest.

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

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

4.4 Ownership (optional)


No information provided

4.5 Documentation (optional)

Balfors, B., Beier, B.-A. & Mörtberg, U. 1989. Översiktlig naturinventering av Upplands-Bro kommun. Stencil.Hedenäs, L. 1989. Angående mossfloran på Svalgarn. Upplands-Bro kommun, stencil.Upplands-Bro kommun. 1995. Artadatabank. Wikars, L.-O. 1990. Vedlevande insekter i två naturskogsartade barrskogar på Svalgarn och Stäksön i Upplands-Bro kommun. Upplands-Bro kommun, stencil.

5. SITE PROTECTION STATUS

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5.1 Designation types at national and regional level (optional):

Code Cover [%]
SE02100.00

5.2 Relation of the described site with other sites (optional):

Designated at national or regional level:

Type code Site name Type Cover [%]
SE02Svalgarn=100.00

5.3 Site designation (optional)


No information provided

6. SITE MANAGEMENT

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6.1 Body(ies) responsible for the site management:

Organisation:Upplands-Bro kommun
Address:
Email:upplands-bro.kommun@upplands-bro.se
Organisation:Länsstyrelsen i Stockholms län
Address:
Email:stockholm@lansstyrelsen.se

6.2 Management Plan(s):

An actual management plan does exist:

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

No, but in preparation
No

6.3 Conservation measures (optional)


No information provided

 

7. MAP OF THE SITE

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INSPIRE ID:SE.SWEPA.SE0110031
Map delivered as PDF in electronic format (optional)
 Yes
X
 No

SITE DISPLAY