Summary for Saaristoa firma (Araneae)

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National Distribution

 
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Identification difficulty rating: 3
Name: Saaristoa firma
Authority: (O.P.-Cambridge, 1905)
Order: Arachnida: Araneae
Family: Linyphiidae
BAP status: UKBAP
National Rarity status: NS
IUCN status: LC

Records: 299
First Record: 1900
Latest Record: 2016

1992-on hectads: 67
Pre-1992 hectads: 93
Total hectads: 155

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About this species

Recorded altitude range
3m to 400m

Species text

Distribution
The species is widespread but very scattered throughout Britain, and is apparently absent from many areas. It is widespread in much of north-western and central Europe.

Habitat and ecology
The spider has generally been recorded from damp situations amongst moss, sphagnum, leaf litter, pine needles and heather in woodland, scrub, peat bog, fen and heathland. Adult females have been found throughout the year, adult males from August to September (Locket & Millidge 1951), April and June.

Status
UK Biodiversity Action Plan priority species. Local and scarce. The species has shown a significant long-term decline of 51% in occupied 10-km squares, particularly in the eastern part of its range.

Threats
Given the relatively broad habitat requirements of this species, the apparent recent decline is difficult to explain. However, drainage of wetlands may have contributed.

Management and conservation
Further research is needed to determine the conservation requirements of this species.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

Adult Season Data (based on 98 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 150 records with habitat information)

Broad subhabitat Data (based on 6 records with subhabitat information)

Structural Habitat Data (based on 75 records with structural habitat information)

Habitat Detail and Method (based on 82 records with habitat detail and method information)

Recorded management for locations with Saaristoa firma

Recorded substrate and hydrology for locations with Saaristoa firma

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