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SNH Archive Report 055: Site Dossier for Bryological Interest – Shieldaig Woods SSSI

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SNH Archive Report 055: Site Dossier for Bryological Interest – Shieldaig Woods SSSI Scottish Natural Heritage Archive Report No. 055 Site dossier for bryological interest – Shieldaig Woods SSSI ARCHIVE REPORT Archive Report No. 055 Site dossier for bryological interest – Shieldaig Woods SSSI For further information on this report please contact: David Genney Scottish Natural Heritage Great Glen House Leachkin Road INVERNESS IV3 8NW Telephone: 01463 725253 E-mail: [email protected] This report should be quoted as: Headley, A.D. 2005. Site dossier for bryological interest – Shieldaig Woods SSSI. Scottish Natural Heritage Archive Report No. 055. This report, or any part of it, should not be reproduced without the permission of Scottish Natural Heritage. This permission will not be withheld unreasonably. The views expressed by the author(s) of this report should not be taken as the views and policies of Scottish Natural Heritage. © Scottish Natural Heritage 2019. Archive Reports Scottish Natural Heritage is committed to making the findings of all of its research publicly available whenever possible. In the past, a number of reports from staff and contractors were produced as paper documents and lodged in the SNH library or file systems. Some related to Site Condition Monitoring, others covered a range of subjects. These were not published as Research Reports for a number of reasons. In order to make these reports more available, we have decided to publish them online under the series title of Archive Reports. These will be numbered consecutively in the order that they are prepared for web publication. Their publication date, authors and title will be recorded as presented in the original report. The Archive Reports will be published as scanned PDF files of the original reports. They have not been subject to any new editing, formatting or other changes, other than the cover, title page and this page. Many of the reports published as Archive Reports were produced by contractors and were originally intended as internal documents to inform our policy and advice. As a result they may contain historical information that is no longer current or accurate, and may contain views of contractors or staff which do not represent the current views and policy of SNH. Many of the reports published as Archive Reports were produced by contractors and were originally intended as internal documents to inform our policy and advice. As a result they may contain historical information that is no longer current or accurate, and may contain views of contractors or staff which do not represent the current views and policy of SNH. This report was commissioned by SNH as part of the Site Condition Monitoring (SCM) programme to assess the condition of special features (habitats, species populations or earth science interests) on protected areas in Scotland (Sites of Special Scientific Interest, Special Areas of Conservation, Special Protection Areas and Ramsar). Site Condition Monitoring is SNH’s rolling programme to monitor the condition of special features on protected areas, their management and wider environmental factors which contribute to their condition. The views expressed in the report are those of the contractor concerned and have been used by SNH staff to inform the condition assessment for the individual special features. Where the report recommends a particular condition for an individual feature, this is taken into account in the assessment process, but may not be the final condition assessment of the feature. Wider factors, which would not necessarily be known to the contractor at the time of the monitoring, are taken into consideration by SNH staff in making final condition assessments. Access permission was obtained from all those owning and managing the site. ARCHIVE REPORT Summary Site dossier for bryological interest – Shieldaig Woods SSSI Archive Report No. 055 Contractor: Alistair Headley Year of publication: 2019 Background Sites of Special Scientific Interest (SSSI) are designated on the basis of notified features of interest. The moss and liverwort communities are one of the notified features of interest at Shieldaig Woods SSSI in the West Highland region. This report describes the results of a survey of the site for the mosses and liverworts present at the site. Main findings The site supports a total of 50 different species of liverwort and 93 different species of moss. There is a small population of the nationally rare moss Daltonia splachnoides (Irish Daltonia) consisting of only 17 small cushions, mostly less than 1cm x 1cm, which is considered to be nationally to be in a vulnerable condition. The site also has a population of another nationally rare moss, Hymenostylium insigne, but this species is considered to be only near threatened. There are two nationally scarce species of moss (Dicranodontium uncinatum and Sematophyllum micans) and two nationally scarce species of liverwort (Kurzia sylvatica and Leptoschyphus cuneifolius). A total of 15 target notes were taken of the site on 4th October 2004 as part of a survey of the condition of the bryophyte interest within Shieldaig Woods SSSI. The birch wood on the northern slopes of Ben Shieldaig supports the vast majority of the bryophyte interest within the SSSI, whilst some base-rich flushes within the pine wood on the south-western slopes of the same hill add interest to a flora indicative of the acid rocks and peats of the area. The bryophyte flora on the birch trees and rocks is particularly luxuriant and is considered to be in favourable nature conservation condition. The bryophyte flora within the pine wood is also in favourable condition, but it is not possible to say whether the bryophyte flora within the heathland and peatland habitats above the woodland is in favourable or unfavourable condition. For further information on this project contact: David Genney, Scottish Natural Heritage, Great Glen House, Leachkin Road, Inverness, IV3 8NW. Tel: 01463 725253 or [email protected] For further information on the SNH Research & Technical Support Programme contact: Research Coordinator, Scottish Natural Heritage, Great Glen House, Leachkin Road, Inverness, IV3 8NW. Tel: 01463 725000 or [email protected] SCM DOSSIER FOR BRYOLOGICAL INTERESTS SHIELDAIG WOODS SSSI 1 SITE DETAILS 1.1 Name: Shieldaig Woods 1.2 National Grid Reference: NG 825 535 1.3 District: West Highland 2 INTRODUCTION Sites of Special Scientific Interest (SSSI) are designated on the basis of notified features of interest. These include habitats, species or geological features. Site Condition Monitoring (SCM) is a six year programme of assessment of the state of all notified features of interest on designated sites. Reporting is based on feature types and will be to common standards across the four UK country conservation agencies. This project addresses bryophyte monitoring on sites in Scotland, and covers all Scottish SSSIs where bryophytes are a notified feature. Shieldaig Woods SSSI covers 223.8 ha of the northern and south-western slopes of Ben Shieldaig on the south side of Upper Loch Torridon between 10 and 430m asl. The site is located within the oceanic climate zone of western Scotland with mean annual rainfall typically between 1600 and 2000 mm. There is birch woodland (c. 25 ha) on the lower parts of the steep north facing slopes of the hill and a pinewood (c. 60 ha) on the lower parts of the south- west facing slopes of the same hill. Heathland and bog cover the upper slopes with considerable exposures of bedrock throughout the SSSI. 2.1 Habitats with bryophyte interest The birch woodland is mainly composed of the Isothecium myosuroides-Diplophyllum albicans sub-community of the Quercus petraea-Betula pubescens-Dicranum majus woodland (W17a), whilst the pinewood is a mixture of the Sphagnum capillifolium/S.quinquefarium-Erica tetralix (W18d) and Scapania gracilis (W18e) sub- communities of the Pinus sylvestris-Hylocomium splendens woodland community (Rodwell 1990). Most of the heathland and bog is a mixture of the Calluna vulgaris- Erica cinerea heath (H10), Scirpus cespitosus-Eriophorum vaginatum blanket mire (M17) and Molinia caerulea-Potentilla erecta mire (M25) (Rodwell 1991). 3 CURRENT SITE CITATION AND MANAGEMENT STATEMENTS As a consequence of this site being located within the oceanic climate zone of western Scotland it hosts a rich lower plant assemblage. The site management statement suggests that 94 species of moss and 58 species of liverwort have been recorded, of which four species of moss and three species of liverwort are nationally scarce. The nationally rare and scarce species of moss and liverwort are noted below, of which the populations of Daltonia splachnoides and Kurzia sylvatica are respectively of regional and local importance. The two red data book species at Shieldaig Woods are Daltonia splachnoides and Hymenostylium insigne. The population of Daltonia at Shieldaig Woods was the first site in Scotland where this moss was recorded from in 1949 by P.R. Bell (Rothero 1997). The outline of the non-vascular plant interests at Shieldaig Woods includes the following list of species: Daltonia splachnoides (NR), Campylopus atrovirens, Kurzia 1 sylvatica (NS), Aphanolejeunea microscopica (NS), Douinia ovata, Scorpiurium circinatum (NS), Harpanthus scutatus (NS), Hygrohypnum dilitatum (NS) (in rocks in waterfall), Hymenostylium insigne (NR) (on wet, calcareous retaining wall). Aphanolejeunea microscopica, Harpanthus scutatus, Hygrohypnum dilitatum and Scorpiurium circinatum, are not listed as being nationally scarce on the JNCC website. Campylopus
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