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UID:338@botaniskforening.dk
DTSTART;TZID=Europe/Copenhagen:20191121T193000
DTEND;TZID=Europe/Copenhagen:20191121T213000
DTSTAMP:20190904T134346Z
URL:https://botaniskforening.dk/arrangement/om-dynamiske-processer-i-islan
 ds-vegetation-alaska-lupin-og-surtsey-in-english/
SUMMARY:Om dynamiske processer i Islands vegetation:  Alaska-lupin og Surt
 sey (in English)
DESCRIPTION:Oplægsholderen\, Borgthor Magnussón\, er fra Islands Naturins
 titut\, Icelandic Institute of Natural History\n\nRecent developments in t
 he vegetation of Iceland: invasion and effects of introduced Nootka lupin 
 and plant colonization on Surtsey island.\n\nThe introduced Nootka lupin (
 Lupinus nootkatensis) has for decades been used extensively to reclaim ero
 ded land in Iceland. However\, it´s rapid spread and invasion of heathlan
 ds\, rocky and riverine habitats has caused considerable concern. We have 
 followed plant succession in old lupin areas in different parts of the cou
 ntry for over 30 years\, under different climatic and substrate conditions
 . The successional pathways differ considerably between southern and north
 ern Iceland. Lupin areas in Iceland are increasingly invaded by the nitrop
 hilous cow parsley (Anthriscus sylvestris) which also is causing concern. 
 Warming climate and decline in sheep farming in the country are fascilitat
 ing these changes.\n\nPlant colonization and succession on the volcanic is
 land of Surtsey\, formed in 1963\, have been closely followed. In 2018\, a
  total of 75 vascular plant species had been discovered on the island\; of
  these\, 62 were present and about 40 had established viable populations. 
 Surtsey had more than twice the species of any of the comparable neighbour
 ing islands\, and all of their common species had established on Surtsey. 
 The first colonizers were dispersed by sea\, but\, after 1985\, bird dispe
 rsal became the principal pathway with the formation of a seagull colony o
 n the island and consequent site amelioration. This allowed many wind-disp
 ersed species to establish after 1990. In 2007 the number of living specie
 s found on the island peaked. A study of plant succession\, soil formation
  and invertebrate communities in permanent plots on Surtsey and on two old
 er neighbouring islands has revealed that seabirds\, through their transfe
 r of nutrients from sea to land\, are major drivers of development of thes
 e ecosystems.\n\n \n\n&nbsp\;
CATEGORIES:Østkredsen
LOCATION:Auditorium A\, Bygning 1\, Universitetsparken 15\, København Ø\,
  Universitetsparken 15\, København Ø\, København\, 2100\, Sjælland\, D
 enmark
GEO:55.702448;12.559411
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Universitetsparken 15\, Kø
 benhavn Ø\, København\, 2100\, Sjælland\, Denmark;X-APPLE-RADIUS=100;X-
 TITLE=Auditorium A\, Bygning 1\, Universitetsparken 15\, København Ø:geo
 :55.702448,12.559411
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