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

SE0810395

1.3 Site name

Virisens vattensystem

1.4 First Compilation date

1998-10

1.5 Update date

2012-08

1.6 Respondent:

Name/Organisation:Länsstyrelsen i Västerbottens län
Address:               
Email:vasterbotten@lansstyrelsen.se
Date site proposed as SCI:1998-12
Date site confirmed as SCI:2003-12
Date site designated as SAC:2009-12
National legal reference of SAC designation:Governmental act M2009/4475/Na

2. SITE LOCATION

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2.1 Site-centre location [decimal degrees]:

Longitude:15.086200
Latitude:65.412800

2.2 Area [ha]

3712.7000

2.3 Marine area [%]

0.0000

2.4 Sitelength [km]:

0.00

2.6 Biogeographical Region(s)

Alpine (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
3210  info      35  0.00 
3220  info      30  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.
P1948Calamagrostis chalybaea           
  • 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

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4.1 General site character

Habitat class % Cover
N0650.00
N0730.00
N1120.00

Total Habitat Cover

100

Other Site Characteristics

Virisen is a large subalpine lake unaffected by hydroelectric power dams. It is the main source for the river Vapstälven, the only larger Swedish river that runs westwards, into the Atlantic. The lake with surroundings represents highly interesting geological formations. The terrain is predominantly of low alpine type with soft hills and a modest variation in altitude. The site is covered by the special provisions in the Swedish Environmental Code, Chapter 4 on management of land and water for certain areas in Sweden: provisions on prohibition of exploitation for hydro-electricity purposes (Chapter 4, § 6 in the Environmental Code). There is no code (protection type) available under field 5.1 to register this kind of general protection.

4.2 Quality and importance

It is a key area for the understanding of the development of rivers running west- or eastwards. It is believed that this particular river/lake originally run eastwards but that was changed by erosion. Furthermore, Virisen is of great importance due to the existence of a population of large brown trout.

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]
LF02.03i
LH01Xb
LH04.01b
LI01i
LI03.01i
MJ02.04o
MJ03.02o
MM01.05b
MM02b
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

5. SITE PROTECTION STATUS

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5.1 Designation types at national and regional level:

Code Cover [%]
SE99100.00

6. SITE MANAGEMENT

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6.1 Body(ies) responsible for the site management:

Organisation:Länsstyrelsen i Västerbottens län
Address:
Email:vasterbotten@lansstyrelsen.se

6.2 Management Plan(s):

An actual management plan does exist:

X
Yes Name: Virisens vattensystem
Link: http://skyddadnatur.naturvardsverket.se/

No, but in preparation
No

 

7. MAP OF THE SITE

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INSPIRE ID:SE.SWEPA.SE0810395
Map delivered as PDF in electronic format (optional)
Yes
No

SITE DISPLAY