Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants
Abstract: Few non‐native species have colonized Antarctica, although increased human activity and accelerated climate change may increase their number, distributional range, and effects on native species on the continent. We searched 13 sites on the maritime Antarctic islands and 12 sites on the Ant...
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Online Access: | http://dx.doi.org/10.1111/j.1523-1739.2012.01865.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1523-1739.2012.01865.x http://onlinelibrary.wiley.com/wol1/doi/10.1111/j.1523-1739.2012.01865.x/fullpdf |
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crwiley:10.1111/j.1523-1739.2012.01865.x 2024-09-09T19:01:46+00:00 Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants MOLINA‐MONTENEGRO, MARCO A. CARRASCO‐URRA, FERNANDO RODRIGO, CRISTIAN CONVEY, PETER VALLADARES, FERNANDO GIANOLI, ERNESTO 2012 http://dx.doi.org/10.1111/j.1523-1739.2012.01865.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1523-1739.2012.01865.x http://onlinelibrary.wiley.com/wol1/doi/10.1111/j.1523-1739.2012.01865.x/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Conservation Biology volume 26, issue 4, page 717-723 ISSN 0888-8892 1523-1739 journal-article 2012 crwiley https://doi.org/10.1111/j.1523-1739.2012.01865.x 2024-08-09T04:23:17Z Abstract: Few non‐native species have colonized Antarctica, although increased human activity and accelerated climate change may increase their number, distributional range, and effects on native species on the continent. We searched 13 sites on the maritime Antarctic islands and 12 sites on the Antarctic Peninsula for annual bluegrass (Poa annua), a non‐native flowering plant. We also evaluated the possible effects of competition between P. annua and 2 vascular plants native to Antarctica, Antarctic pearlwort (Colobanthus quitensis) and Antarctic hairgrass (Deschampsia antarctica). We grew the native species in experimental plots with and without annual bluegrass under conditions that mimicked the Antarctic environment. After 5 months, we measured photosynthetic performance on the basis of chlorophyll fluorescence and determined total biomass of both native species. We found individual specimens of annual bluegrass at 3 different sites on the Antarctic Peninsula during the 2007–2008 and 2009–2010 austral summers. The presence of bluegrass was associated with a statistically significant reduction in biomass of pearlwort and hairgrass, whereas the decrease in biomass of bluegrass was not statistically significant. Similarly, the presence of bluegrass significantly reduced the photosynthetic performance of the 2 native species. Sites where bluegrass occurred were close to major maritime routes of scientific expeditions and of tourist cruises to Antarctica. We believe that if current levels of human activity and regional warming persist, more non‐native plant species are likely to colonize the Antarctic and may affect native species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Wiley Online Library Antarctic Antarctic Peninsula Austral The Antarctic Conservation Biology 26 4 717 723 |
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English |
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Abstract: Few non‐native species have colonized Antarctica, although increased human activity and accelerated climate change may increase their number, distributional range, and effects on native species on the continent. We searched 13 sites on the maritime Antarctic islands and 12 sites on the Antarctic Peninsula for annual bluegrass (Poa annua), a non‐native flowering plant. We also evaluated the possible effects of competition between P. annua and 2 vascular plants native to Antarctica, Antarctic pearlwort (Colobanthus quitensis) and Antarctic hairgrass (Deschampsia antarctica). We grew the native species in experimental plots with and without annual bluegrass under conditions that mimicked the Antarctic environment. After 5 months, we measured photosynthetic performance on the basis of chlorophyll fluorescence and determined total biomass of both native species. We found individual specimens of annual bluegrass at 3 different sites on the Antarctic Peninsula during the 2007–2008 and 2009–2010 austral summers. The presence of bluegrass was associated with a statistically significant reduction in biomass of pearlwort and hairgrass, whereas the decrease in biomass of bluegrass was not statistically significant. Similarly, the presence of bluegrass significantly reduced the photosynthetic performance of the 2 native species. Sites where bluegrass occurred were close to major maritime routes of scientific expeditions and of tourist cruises to Antarctica. We believe that if current levels of human activity and regional warming persist, more non‐native plant species are likely to colonize the Antarctic and may affect native species. |
format |
Article in Journal/Newspaper |
author |
MOLINA‐MONTENEGRO, MARCO A. CARRASCO‐URRA, FERNANDO RODRIGO, CRISTIAN CONVEY, PETER VALLADARES, FERNANDO GIANOLI, ERNESTO |
spellingShingle |
MOLINA‐MONTENEGRO, MARCO A. CARRASCO‐URRA, FERNANDO RODRIGO, CRISTIAN CONVEY, PETER VALLADARES, FERNANDO GIANOLI, ERNESTO Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
author_facet |
MOLINA‐MONTENEGRO, MARCO A. CARRASCO‐URRA, FERNANDO RODRIGO, CRISTIAN CONVEY, PETER VALLADARES, FERNANDO GIANOLI, ERNESTO |
author_sort |
MOLINA‐MONTENEGRO, MARCO A. |
title |
Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
title_short |
Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
title_full |
Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
title_fullStr |
Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
title_full_unstemmed |
Occurrence of the Non‐Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants |
title_sort |
occurrence of the non‐native annual bluegrass on the antarctic mainland and its negative effects on native plants |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1523-1739.2012.01865.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1523-1739.2012.01865.x http://onlinelibrary.wiley.com/wol1/doi/10.1111/j.1523-1739.2012.01865.x/fullpdf |
geographic |
Antarctic Antarctic Peninsula Austral The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Conservation Biology volume 26, issue 4, page 717-723 ISSN 0888-8892 1523-1739 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1523-1739.2012.01865.x |
container_title |
Conservation Biology |
container_volume |
26 |
container_issue |
4 |
container_start_page |
717 |
op_container_end_page |
723 |
_version_ |
1809814971293368320 |