Lucknow India January 2002. Invited to organize a workshop on “Population ecology of Bryophytes”.
Workshop on “Harmonisation of National Red Lists in Europe”, Leiden27/28 November 2002.
Introductory workshop on the project “Biodiversity, rarity, life history strategies and phylogeny: a case study in the hepatic family Lophoziaceae”, Cape Town, South Africa, February 2003.
IAB Conference, Mérida, Venezuela, 2004.01.15-20. Gave a lecture on “The expansion of the neophytes Orthodontium lineare and Campylopus introflexus in Britain and continental Europe” co-authored by Dr. K. Hassel.p>
2nd Bryophylogeny Conference, Göttingen, Sept. 2004.
Planta Europa 4, Valencia, Sept. 2004
5th European Bryophyte Conservation Conference, Valencia, Sept. 2004.
XVII International Botanical Congress, Vienna, 2005.07.18-23 Invited to give a lecture on ”The role of sexual and asexual reproduction for rarity a case study of the family Lophoziaceae”
BRYOPLANET workshop on “The State of Bryophyte Ecology 2005 ” in Kéked, Hungary, 2005.08.20-22. Invited to give a key lecture on “The state of conservation biology in bryophytes”.
“Conservation Ecology of Cryptogams” 21-25 November 2005 in Bispgården, Sweden. Gave a lecture on “Rarity patterns in northern hemisphere members of the Lophoziaceae/ Scapaniaceae complex” co-authored with A. Séneca and M. Santos.
1st European Congress of Conservation Biology “Diversity for Europe” 22-26 August 2006, in Eger, Hungary