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)
| SITE | SE0110263 |
|---|
| SITENAME | Norsviken |
|---|
TABLE OF CONTENTS
1. SITE IDENTIFICATION
Back to top1.1 Type
1.2 Site code
1.3 Site name
1.4 First Compilation date
1.5 Update date
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: | 2001-06 |
| 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 top2.1 Site-centre location [decimal degrees]:
| Longitude: | 18.878384 |
| Latitude: | 59.884396 |
2.2 Area [ha]
2.3 Marine area [%]
2.4 Sitelength [km] (optional):
No information provided
2.5 Administrative region code and name
No information provided
2.6 Biogeographical Region(s)
3. ECOLOGICAL INFORMATION
Back to top3.1 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
|
|---|
| | | | | | | Representativity | Relative Surface | Conservation | Global |
|---|
1650
|
|
| 20.9
| 0.00
| P
| B
| C
| B
| B
|
| 6430
|
|
| 2.4
| 0.00
| M
| B
| C
| C
| C
|
- 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
Back to top4.1 General site character
|
Habitat class
|
% Cover
|
|---|
| N10 | 100.00 |
Total Habitat Cover | 100 |
|---|
Other Site Characteristics
| This site is an inner archipelago area. It consists of a narrow bay and, at the inner tip of the bay, a wet tall herb site along a small rivulet. Morphological features of the bay such as the large catchment area (200 times as big as the inlet) and the shallow and narrow threshold probably give the bay a low salinity and short turnover time, as well as higher temperature than larger waterbodies outside the threshold. There is little human modification of the shore-line and a limited number of holiday cottages in the vicinity of the inlet. This indicates rather natural environmental conditions. There are, however, no site specific data on water chemistry, with no relevant data from surrounding sea. The only data useful for assessment of the water quality in the site comes from the stream which leads most of the surface run off to the inlet and an upstream lake. Seemingly there is good retention of nutrients as the lake has moderate ecological status for phytoplankton and bad status for nutrients while the stream has good status for phytobentose. |
4.2 Quality and importance
| Little is known about flora and fauna in the marine part of the site. Relatively low degree of human impact and good morphological conditions for reproduction of fresh water fish species gives the site high potential conservation importance. In the costal brackish-water environment fresh water fish-species are important ecological factors. Most stocks are limited by availability of spawning grounds and suitable environments for growth of fry, rather than food availability. In Norsviken there are theoretically very good conditions for growth of fry, but there are no field data supporting this. In the stream Norsjöbäcken however, several exploratory fisheries have shown extensive spawning migration from the site. This includes pike, perch, many species of Cyprinids, including the national red list species Vimba vimba, river lamprey and occasionally trout. Fry of many of these species probably uses the site for growth. |
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 |
|---|
| Rank | Threats and pressures [code] | Pollution (optional) [code] | inside/outside [i|o|b] |
|---|
| H | A04.03 | | i |
| Positive Impacts |
|---|
| Rank | Activities, management [code] | Pollution (optional) [code] | inside/outside [i|o|b] |
|---|
| H | A04.02 | | i |
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)
No information provided
5. SITE PROTECTION STATUS
Back to top5.1 Designation types at national and regional level (optional):
|
Code
|
Cover [%]
|
|---|
| SE00 | 100.00 |
5.2 Relation of the described site with other sites (optional):
No information provided
5.3 Site designation (optional)
No information provided
6. SITE MANAGEMENT
Back to top6.1 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:
6.3 Conservation measures (optional)
No information provided
7. MAP OF THE SITE
Back to top| INSPIRE ID: | SE.SWEPA.SE0110263 |
| Map delivered as PDF in electronic format (optional) |
|
SITE DISPLAY