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

C

1.2 Site code

SE0110017

1.3 Site name

Tyresta-Åva

1.4 First Compilation date

1995-11

1.5 Update date

2012-08

1.6 Respondent:

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

1.7 Site indication and designation / classification dates

Date site classified as SPA:1996-12
National legal reference of SPA designationGovernmental act M96/4019/4
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:18.296900
Latitude:59.180500

2.2 Area [ha]

3269.4000

2.3 Marine area [%]

2.2000

2.4 Sitelength [km]:

0.00

2.6 Biogeographical Region(s)

Boreal (0.00 %) Marine Baltic Sea (2.20 %)

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
1630  info      5.6  0.00 
3110  info      49.6  0.00 
3160  info      5.6  0.00 
6270  info      10.7  0.00 
7140  info      56.9  0.00 
9010  info      2081.1  0.00 
9020  info      8.6  0.00 
9070  info      41.1  0.00 
9080  info      1.3  0.00 
9180  info      6.7  0.00 
91D0  info      140.1  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.
P1386Buxbaumia viridis           
BA236Dryocopus martius           
BA002Gavia arctica       
BA217Glaucidium passerinum       
BA246Lullula arborea           
BA094Pandion haliaetus       
BA072Pernis apivorus                 
BA241Picoides tridactylus       
BA409Tetrao tetrix tetrix    10  10  bfemales     
BA409Tetrao tetrix tetrix    10  10  males     
BA108Tetrao urogallus    50  50  males     
BA108Tetrao urogallus    50  50  bfemales     
  • 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
N011.00
N063.00
N073.00
N157.00
N162.00
N1782.00
N191.00
N231.00

Total Habitat Cover

100

Other Site Characteristics

This site is situated about 20 km southeast of Stockholm city. It is one of the most extensive areas of western taiga in southern Sweden. Outcrop of Precambrian bedrock covers most of the area. Narrow valleys are filled with till and peat. Small areas around Brakmaren in the north, around Tyresta village in the southwest and in the Åvaån valley in the south-east are dominated by clay. Sparsely forested bedrock on altitudes between 40 and 70 meters above sea level is the dominating landscape elements in the area. A scattered pine forest of lichen type dominates the vegetation on the bedrock outcrops with very low productivity (flat-rock pine forest). Numerous, mostly narrow, valleys formed along tectonic joints are other typical landscape elements. Coniferous forests dominate the vegetation. In the valleys forest alternate with oligotrophic and dystrophic lakes, mires and bogs. The forests in the valleys are mainly wet or moist forest types dominated by Norwegian spruce. In the north some areas with broad-leafed deciduous forest has been included. The broad-leafed woods grow on rocky slopes and on adjacent flatland with soils rich in mould. In the southeast an agricultural landscape with pastures has been included. In year 1999 a major forest-fire covered 250 -300 ha in the southern parts of the site and more outside. In the central parts of the site the forests are comparatively young due to an elder forest-fire from the beginning of the 20-th century.

4.2 Quality and importance

The major quality of the site is its vast area of western taiga. Such a large area is very rare in southern Sweden. True primary forests in the site are of flat-rock pine forest-type. Very little or no signs of cutting or other human impact can be found. Norwegian spruce forests in the narrow valleys show some traces of forestry, but they have been more or less left for free development during the 20th century. Logs and standing dead trees are numerous in large parts of the site. The site also includes some areas in the northern and south-eastern parts where forestry has been going on until quite recently. These areas have been included in the site mainly because of some small brooks that accommodate a very exclusive invertebrate fauna. In the north some areas with broad-leafed deciduous forest has been included. Broad-leaved forests of the site are known for several southern vascular plants, which are rare so far north. A rich flora of epiphytes with many threatened species also inhabits these forests. In the southeast an agricultural landscape with species rich pastures, open stands of old, huge oak and marine shore meadows have been included. The recently burnt area maintained for a few years a very large population of Geranium lanuginosum. There is also an extensive investigation programme on fire-dependent invertebrate-fauna, which has presented interesting preliminary results.

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]
LBi
LH04b
Positive Impacts
RankActivities, management [code]Pollution (optional) [code]inside/outside [i|o|b]
LA04i

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

Tyresö kommun. 1994. Redovisning av klass I och II naturvårdsobjekt i Tyresö. Stencil. Haninge kommun. Naturvårdskonsulterna i Sigtuna HB.1981. Naturinventering av nordöstra Haninge. Häfte. Stockholms universitet. Uppsats från kursen Naturvård med geovetenskaplig inriktning-Tyresta-Åva. 1987. Stenciler. Naturvårdsverket. 1993. Skötselplan med föreskrifter för Tyresta nationalpark. Naturvårdsverket. Skogsstyrelsen. 1982. Urskogar - Inventering av urskogsartade områden i Sverige. 2. Södra Sverige. SNV pm 1508. Botaniska sällskapet i Stockholm. Arbetsgruppen för Länsstyrelsen i Stockholms län. 1983. Naturvårdsprogram för Stockholms län. Stockholmstraktens lavar. Södertörnprojektet. 1991. Hotade lavar på Södertörn- Tyresö kommun. Tyresö kommun. Naturvårdskonsulterna i Sigtuna 1981. Naturinventering Tyresö kommun huvudrapport. Haninge kommun. Magnuson, L. 1987. Vägvisare till naturen i Haninge. Collinder, P. m fl. 1994. Naturen i Stockholms län - en utflyktsguide. Haninge kommun. 1994. Inventering av hotade arter på Södertörn. Föreningen Natur och Samhälle i Norden.1982. Tyresta. Publikation 6. Länsstyrelsen i Stockholms län. 1993. Ängar och hagar. Rapport 1993:18. Länsstyrelsen i Stockholms län. 1995. Våtmarksinventering i Stockholms län.

5. SITE PROTECTION STATUS

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5.1 Designation types at national and regional level:

Code Cover [%]
SE0158.00
SE0242.00

5.2 Relation of the described site with other sites:

Designated at national or regional level:

Type code Site name Type Cover [%]
SE02Hammarbergets naturreservat-100.00
SE02Tyresta naturreservat*50.00
SE01Tyresta nationalpark-100.00

Designated at international level:

Type Site name Type Cover [%]
Other Hammarbergets naturreservat-100.00
Tyresta naturreservat*50.00
Tyresta nationalpark-100.00

6. SITE MANAGEMENT

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6.1 Body(ies) responsible for the site management:

Organisation:Länsstyrelsen i Stockholms län
Address:
Email:stockholm@lansstyrelsen.se
Organisation:Stiftelsen Tyrestaskogen
Address:
Email:info@tyresta.se

6.2 Management Plan(s):

An actual management plan does exist:

X
Yes Name: Tyresta-Åva
Link: http://skyddadnatur.naturvardsverket.se/

No, but in preparation
No

 

7. MAP OF THE SITE

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INSPIRE ID:SE.SWEPA.SE0110017
Map delivered as PDF in electronic format (optional)
Yes
No

SITE DISPLAY