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Wylfa Newydd Project ENERGY WORKING FOR BRITAIN FOR WORKING ENERGY Wylfa Newydd Project 6.4.51 ES Volume D - WNDA Development App D9-18 - Ancient Woodland Survey Report PINS Reference Number: EN010007 Application Reference Number: 6.4.51 June 2018 Revision 1.0 Regulation Number: 5(2)(a) Planning Act 2008 Infrastructure Planning (Applications: Prescribed Forms and Procedure) Regulations 2009 Horizon Internal DCRM Number: WN0902-JAC-PAC-APP-00152 [This page is intentionally blank] Wylfa Newydd Horizon Nuclear Power Ancient Woodland Botanical Survey Report June 2016 WN034-JAC-PAC-REP-00079 Document Title Horizon Nuclear Power Ancient Woodland Botanical Survey Report Wylfa Newydd Project No: 60PO8058 Document Title: Ancient Woodland Botanical Survey Report Document No.: 60PO8058/TER/REP/002 Revision: 0 Date: June 2016 Client Name: Horizon Nuclear Power Client No: WN034-JAC-PAC-REP-00079 Project Manager: Rob Bromley Author: David Morris File Name: Ancient Woodland Botanical Survey Report Jacobs U.K. Limited 1180 Eskdale Road Winnersh, Wokingham Reading RG41 5TU United Kingdom T +44 (0)118 946 7000 F +44 (0)118 946 7001 www.jacobs.com © Copyright 2018 Jacobs U.K. Limited. The concepts and information contained in this document are the property of Jacobs. Use or copying of this document in whole or in part without the written permission of Jacobs constitutes an infringement of copyright. Limitation: This report has been prepared on behalf of, and for the exclusive use of Jacobs’ Client, and is subject to, and issued in accordance with, the provisions of the contract between Jacobs and the Client. Jacobs accepts no liability or responsibility whatsoever for, or in respect of, any use of, or reliance upon, this report by any third party. Document history and status Revision Date Description By Review Approved 0 04/07/16 FINAL DM NC RB i Ancient Woodland Botanical Survey Report Contents 1. Introduction ............................................................................................................................................... 1 1.1 Ancient Woodland in Wales ........................................................................................................................ 3 1.2 Ancient Woodland Indicators ...................................................................................................................... 3 2. Survey Methodology ................................................................................................................................. 5 2.1 National Vegetation Classification .............................................................................................................. 5 3. Results and Discussion ........................................................................................................................... 7 3.1 Woodland Flora and NVC Affinities ............................................................................................................ 7 3.1.1 Manor GardenManor Garden ..................................................................................................................... 7 3.1.2 Simdda-Wen ............................................................................................................................................... 8 3.1.3 The Firs Hotel ............................................................................................................................................. 8 3.2 Status as Ancient Woodland ....................................................................................................................... 8 4. Bibliography ............................................................................................................................................ 10 Appendix A. Species Lists Appendix B. Photographs ii Ancient Woodland Botanical Survey Report 1. Introduction The proposed Site Preparation and Clearance site for Wylfa Newydd contains three small units of woodland identified as ancient in the Ancient Woodland Inventory for Wales (Table 1, Figure 1). The names given in Table 1 are not official and are adopted for ease of reference only. Table 1. Ancient woodlands within the Wylfa Newydd Development Area (Forestry Commission, 2016) Woodland name Ancient Woodland National Grid Area Ancient Woodland Inventory Inventory 2011 ID number Reference 2011 category Manor Garden Ancient Semi Natural 26060 SH 356 938 0.3 ha Manor Garden Woodland Simdda- Ancient Semi Natural 26059 SH 353 932 0.32 WenSimdda-Wen Woodland SH 352 929 Restored Ancient Woodland The Firs Hotel Hotel 26075 0.52 Site This report presents the results of botanical surveys of these woods and discusses how these results relate to the identification of the woodlands as ancient woodland. The concept of ancient woodland and the origin of the Ancient Woodland Inventory are first described in order to fix ideas for later reference. 1 Ancient Woodland Botanical Survey Report Figure 1. Locations of designated Ancient Woodland according to the Ancient Woodland Inventory 2 Ancient Woodland Botanical Survey Report 1.1 Ancient Woodland in Wales Ancient woodland is defined as land that has been tree-covered since at least 1600 A.D. This can include a diversity of woodland origins and types, either woodland derived from primary post-glacial forest or secondary woodland that arose before this date (e.g. following abandonment of land associated with agricultural depressions or plagues). An ancient woodland can have passed through a variety of specific uses since 1600 A.D., but it shall never have been destroyed and converted to another kind of land use, such as arable farming. The long continuity of an ancient woodland makes it potentially of great nature conservation value as a habitat for rare flora and fauna, or assemblages of such not found elsewhere. The concept of ancient woodland has its origins in the work of Oliver Rackham and George Peterken in the late twentieth century (e.g. Rackham (1980) and Peterken (1981)). In order to establish continuity of woodland these researchers combined primary documentary evidence (maps, court rolls etc.) with field evidence in the form of archaeological features (ancient earthworks, saw pits etc.), ancient trees, and aspects of flora and fauna suggestive of ecological continuity. Using this historical approach, the Nature Conservancy Council, as it was, instigated the Ancient Woodland Inventory, an attempt to identify all ancient woodlands in England, Wales and Scotland. The digital version of the Inventory for Wales was first published in 2004 and is available from the Forestry Commission (Forestry Commission, 2016). The Ancient Woodland Inventory places woodland into one of four categories (Natural Resources Wales, 2016): • Ancient Semi-Natural Woodland (ASNW) – broadleaf woodlands comprising mainly native tree and shrub species which are believed to have been in existence for over 400 years. • Plantation on Ancient Woodland Sites (PAWS) – sites which are believed to have been continuously wooded for over 400 years and currently have a canopy cover of more than 50 percent non-native conifer tree species. • Restored Ancient Woodland Sites (RAWS) – woodlands which are predominately broadleaves now and are believed to have been continually wooded for over 400 years. These woodlands will have gone through a phase when canopy cover was more than 50% non-native conifer tree species and now have a canopy cover of more than 50 percent broadleaf. • Ancient Woodland Site of Unknown Category (AWSU) – woodlands which may be ASNW, RAWS or PAWS. These areas are predominantly in transition and existing tree cover is described as 'shrubs', 'young trees', 'felled' or 'ground prepared for planting'. Boundaries of woodland within the Inventory were deduced from the earliest available mapping. For most of Wales, in particular for Anglesey, this is the 1st edition of the Ordnance Survey (OS), circa 1830 and at a scale of one inch to the mile. The later six inch to the mile OS county series dates from 1888 to 1913. Given such recent documentary evidence, ‘the AWI was always considered to be provisional and subject to refinement and was never intended as a definitive listing of ancient … woods’ (Natural Resources Wales, 2016). 1.2 Ancient Woodland Indicators The work of Rackham, Peterken and others gave rise to the concept of Ancient Woodland Indicator (AWI) plants. These are species of fern and flowering plant associated primarily with woodland which on other grounds would be accepted as ancient in origin, and which might be slow to disperse into more recent woodland. Lists of AWI have been published for the southern-most regions of England (collated e.g. in Rose & O'Reilly (2006)), where the documentary evidence is sufficient to substantiate a correlation between continuity of woodland and the occurrence of certain plant species. The concept of AWI is widely applied by analogy to other parts of Britain where such evidence is lacking. The AWI concept is not without its limitations. Some listed AWI species are popular garden plants (e.g. primrose [Primula vulgaris] or hart’s-tongue fern [Asplenium scolopendrium]); the use of these as AWI for a given wood 3 Ancient Woodland Botanical Survey Report therefore needs to be weighed against the proximity of habitation and signs of human influence on the woodland flora. Some species are also considered as AWI in some parts of the country but not others, due to absence or being non-native there, or because they are found widely outside of ancient woodland. A convincing ancient woodland
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