alien invaders and native thugs: some new concerns

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Alien invaders and native thugs: some new concerns. Ian Denholm. Botanical Society of the British Isles. Alien invaders I: Chilean Giant Rhubarb Gunnera tinctoria. From stately homes. to Irish & Scottish riverbanks. A lien invaders I: Chilean Giant Rhubarb Gunnera tinctoria. - PowerPoint PPT Presentation

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Page 1: Alien invaders and native thugs: some new concerns
Page 2: Alien invaders and native thugs: some new concerns

Alien invaders and native thugs: some new concerns

Ian DenholmBotanical Society of the British

Isles

Page 3: Alien invaders and native thugs: some new concerns

Alien invaders I: Chilean Giant Rhubarb Gunnera

tinctoria

From stately homes..to Irish & Scottish riverbanks

Page 4: Alien invaders and native thugs: some new concerns

Alien invaders I: Chilean Giant Rhubarb Gunnera

tinctoria

Page 5: Alien invaders and native thugs: some new concerns

Alien invaders I: Chilean Giant Rhubarb Gunnera

tinctoriaThe Mayo News, July 2010 Gunnera kill

begins on Achill.

“ARMED with hooks, machetes and a couple of gallons of ‘round-up’, volunteers have travelled to Achill Island to try to eradicate the Gunnera plant” .

Page 6: Alien invaders and native thugs: some new concerns

Alien invaders II:Ragweed Ambrosia artemisiifolia

World’s most allergenic plant?

Page 7: Alien invaders and native thugs: some new concerns

Alien invaders III:Fringe-cups Tellima grandiflora

Page 8: Alien invaders and native thugs: some new concerns

Alien invaders IV: Summer cypress Bassia scoparia

Page 9: Alien invaders and native thugs: some new concerns

“Natives good, aliens bad?”

www.bsbi.org.uk/alien_invaders_.html

Cornflower, corncockle & Fuchsia: bad aliens?

Nettle, bramble & bracken: native thugs?