Impact of American Skunk Cabbage – Report by Neil Sanderson Commissioned by New Forest Non-Native Plants

Impact of American Skunk Cabbage – Report by Neil Sanderson Commissioned by New Forest Non-Native Plants

RESEARCH ON THE IMPACT OF AMERICAN SKUNK CABBAGE LYSICHITON AMERICANUS ON NATIVE VEGETATION January 2013 N A Sanderson BSc MSc for Hampshire and Isle of Wight Wildlife Trust --------------------------- NEIL SANDERSON Botanical Survey and Assessment --------------------------- 3 GREEN CLOSE WOODLANDS HAMPSHIRE SO40 7HU 023 8029 3671 Email: [email protected] Report commissioned by Hampshire & Isle of Wight Wildlife Trust on behalf of The New Forest Non-Native Plants Project NEW FOREST NON–NATIVE PLANTS PROJECT RESEARCH ON THE IMPACT OF SKUNK CABBAGE LYSICHITON AMERICANUS ON NATIVE VEGETATION January 2013 N A Sanderson BSc MSc For Hampshire and Isle of Wight Wildlife Trust --------------------------- NEIL SANDERSON --------------------------- 3 GREEN CLOSE WOODLANDS HAMPSHIRE SO40 7HU 023 8029 3671 Email: [email protected] NEW FOREST NON–NATIVE PLANTS PROJECT RESEARCH ON THE IMPACT OF SKUNK CABBAGE LYSICHITON AMERICANUS ON NATIVE VEGETATION Contents 1.0 INTRODUCTION................................................................................................................................................1 1.1 Background.....................................................................................................................................................1 1.1.1 The New Forest Non-Native Plants Project..........................................................................................1 1.12 The Invasive Non-Native Species Framework Strategy for Great Britain............................................1 1.1.3 Need for Research on the Impact of Invasive Non-natives on Native Vegetation..............................1 1.2 Brief.................................................................................................................................................................1 1.2.1 Priority species for research during 2012, American Skunk cabbage..................................................1 1.2.2 Aim of the research................................................................................................................................2 1.2.3 Methodology...........................................................................................................................................2 2.0 METHODS...........................................................................................................................................................3 2.1 Vegetation Survey...........................................................................................................................................3 2.1.1 Sites.........................................................................................................................................................3 2.1.2 Timing.....................................................................................................................................................3 2.1.3 Landscape History..................................................................................................................................3 2.1.4 Vegetation..............................................................................................................................................3 2.1.5 Sampling.................................................................................................................................................4 2.2 Data.................................................................................................................................................................4 2.2.1 Nomenclature.........................................................................................................................................4 2.2.2 Indicator Lists.........................................................................................................................................6 2.2.3 Rarity & Threat.......................................................................................................................................6 2.2.4 National Vegetation Classification........................................................................................................6 2.2.5 Statistical Analysis..................................................................................................................................7 3.0 HARCOURT WOOD...........................................................................................................................................8 3.1 Landscape History..........................................................................................................................................8 3.1.1 Geology...................................................................................................................................................8 3.1.2 19th Century Maps..................................................................................................................................8 3.1.3 Early 20th Century...................................................................................................................................8 3.1.4 Current Landscape.................................................................................................................................8 3.2 Vegetation.......................................................................................................................................................9 3.2.1 Vegetation Area 1...................................................................................................................................9 3.2.2 Vegetation Area 2...................................................................................................................................9 3.2.3 Flora of the Wider Area........................................................................................................................10 3.3 Impact of Skunk Cabbage.............................................................................................................................10 3.3.1 Impact of Skunk Cabbage in Area 1....................................................................................................10 3.3.2 Impact of Skunk Cabbage in Area 2....................................................................................................14 3.4 Maps..............................................................................................................................................................16 3.5 Data...............................................................................................................................................................20 3.6 Photos............................................................................................................................................................27 4.0 AMPRESS...........................................................................................................................................................31 4.1 Landscape History........................................................................................................................................31 4.1.1 Geology.................................................................................................................................................31 4.1.2 1807 Ordnance Surveyors Drawing.....................................................................................................31 4.1.3 19th and 20th Ordnance Survey Plans...................................................................................................31 4.1.4 Current Landscape...............................................................................................................................31 4.2 Vegetation.....................................................................................................................................................31 4.3 Impact of Skunk Cabbage.............................................................................................................................32 4.4 Maps..............................................................................................................................................................37 4.5 Data...............................................................................................................................................................40 4.6 Photos............................................................................................................................................................45 5.0 DISCUSSION.....................................................................................................................................................47 5.1 Impact of Skunk Cabbage Lysichiton americanus .........................................................................................47 5.1.1 Vulnerable Habitats..............................................................................................................................47 5.1.2 Effect on Native Vegetation.................................................................................................................47 5.1.3 Quality of Habitats Invaded................................................................................................................48 5.2 Conclusions...................................................................................................................................................49 6.0 REFERENCES....................................................................................................................................................50

View Full Text

Details

  • File Type
    pdf
  • Upload Time
    -
  • Content Languages
    English
  • Upload User
    Anonymous/Not logged-in
  • File Pages
    56 Page
  • File Size
    -

Download

Channel Download Status
Express Download Enable

Copyright

We respect the copyrights and intellectual property rights of all users. All uploaded documents are either original works of the uploader or authorized works of the rightful owners.

  • Not to be reproduced or distributed without explicit permission.
  • Not used for commercial purposes outside of approved use cases.
  • Not used to infringe on the rights of the original creators.
  • If you believe any content infringes your copyright, please contact us immediately.

Support

For help with questions, suggestions, or problems, please contact us