Breaching the dispersal barrier to invasion: quantification and management
Globalization has resulted in unprecedented movements of people, goods, and alien species across the planet. Although the impacts of biological invasions are widely appreciated, a bias exists in research effort to post-dispersal processes because of the difficulties of measuring propagule pressure....
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/119891 2023-11-12T04:08:17+01:00 Breaching the dispersal barrier to invasion: quantification and management Lee, J.E. Chown, S.L. 2010-11-23T08:46:51Z 1047814 bytes application/pdf http://hdl.handle.net/10019.1/119891 en eng Ecological Society of America Lee, J.E. and Chown, S.L. (2009). Breaching the dispersal barrier to invasion: quantification and management. Ecological Applications, 19(7), 1944-1959 http://hdl.handle.net/10019.1/119891 Antarctica biosecurity Gough Island intra-regional movement invasion invasion pathway Marion Island propagule pressure seed dispersal JournalArticles 2010 ftunstellenbosch 2023-10-22T07:31:11Z Globalization has resulted in unprecedented movements of people, goods, and alien species across the planet. Although the impacts of biological invasions are widely appreciated, a bias exists in research effort to post-dispersal processes because of the difficulties of measuring propagule pressure. The Antarctic provides an ideal model system in which to investigate propagule movements because of the region’s isolation and small number of entry routes. Here we investigated the logistics operations of the South African National Antarctic Programme (SANAP) and quantified the initial dispersal of alien species into the region. We found that over 1400 seeds from 99 taxa are transported into the Antarctic each field season in association with SANAP passenger luggage and cargo. The first ever assessment of propagule drop-off indicated that 30–50% of these propagules will enter the recipient environment. Many of the taxa include cosmopolitan weeds and known aliens in the Antarctic, indicating that logistics operations form part of a globally self-perpetuating cycle moving alien species between areas of human disturbance. In addition, propagules of some taxa native to the Antarctic region were also found, suggesting that human movements may be facilitating intra-regional homogenization. Several relatively simple changes in biosecurity policy that could significantly reduce the threat of introduction of nonnative species are suggested. Centre of Excellence for Invasion Biology Article in Journal/Newspaper Antarc* Antarctic Antarctica Marion Island South African National Antarctic Programme Stellenbosch University: SUNScholar Research Repository Antarctic Gough ENVELOPE(159.367,159.367,-81.633,-81.633) The Antarctic |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
English |
topic |
Antarctica biosecurity Gough Island intra-regional movement invasion invasion pathway Marion Island propagule pressure seed dispersal |
spellingShingle |
Antarctica biosecurity Gough Island intra-regional movement invasion invasion pathway Marion Island propagule pressure seed dispersal Lee, J.E. Chown, S.L. Breaching the dispersal barrier to invasion: quantification and management |
topic_facet |
Antarctica biosecurity Gough Island intra-regional movement invasion invasion pathway Marion Island propagule pressure seed dispersal |
description |
Globalization has resulted in unprecedented movements of people, goods, and alien species across the planet. Although the impacts of biological invasions are widely appreciated, a bias exists in research effort to post-dispersal processes because of the difficulties of measuring propagule pressure. The Antarctic provides an ideal model system in which to investigate propagule movements because of the region’s isolation and small number of entry routes. Here we investigated the logistics operations of the South African National Antarctic Programme (SANAP) and quantified the initial dispersal of alien species into the region. We found that over 1400 seeds from 99 taxa are transported into the Antarctic each field season in association with SANAP passenger luggage and cargo. The first ever assessment of propagule drop-off indicated that 30–50% of these propagules will enter the recipient environment. Many of the taxa include cosmopolitan weeds and known aliens in the Antarctic, indicating that logistics operations form part of a globally self-perpetuating cycle moving alien species between areas of human disturbance. In addition, propagules of some taxa native to the Antarctic region were also found, suggesting that human movements may be facilitating intra-regional homogenization. Several relatively simple changes in biosecurity policy that could significantly reduce the threat of introduction of nonnative species are suggested. Centre of Excellence for Invasion Biology |
format |
Article in Journal/Newspaper |
author |
Lee, J.E. Chown, S.L. |
author_facet |
Lee, J.E. Chown, S.L. |
author_sort |
Lee, J.E. |
title |
Breaching the dispersal barrier to invasion: quantification and management |
title_short |
Breaching the dispersal barrier to invasion: quantification and management |
title_full |
Breaching the dispersal barrier to invasion: quantification and management |
title_fullStr |
Breaching the dispersal barrier to invasion: quantification and management |
title_full_unstemmed |
Breaching the dispersal barrier to invasion: quantification and management |
title_sort |
breaching the dispersal barrier to invasion: quantification and management |
publisher |
Ecological Society of America |
publishDate |
2010 |
url |
http://hdl.handle.net/10019.1/119891 |
long_lat |
ENVELOPE(159.367,159.367,-81.633,-81.633) |
geographic |
Antarctic Gough The Antarctic |
geographic_facet |
Antarctic Gough The Antarctic |
genre |
Antarc* Antarctic Antarctica Marion Island South African National Antarctic Programme |
genre_facet |
Antarc* Antarctic Antarctica Marion Island South African National Antarctic Programme |
op_relation |
Lee, J.E. and Chown, S.L. (2009). Breaching the dispersal barrier to invasion: quantification and management. Ecological Applications, 19(7), 1944-1959 http://hdl.handle.net/10019.1/119891 |
_version_ |
1782328610417278976 |