Vegetation shifts observed in arctic tundra 1.5 decades after fire


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dc.contributor.author Barrett, Kirsten
dc.contributor.author Rocha, Adrian V.
dc.contributor.author van de Weg, Martine J.
dc.contributor.author Shaver, Gaius R.
dc.date.accessioned 2012-10-11T19:35:22Z
dc.date.available 2013-04-19T08:46:43Z
dc.date.issued 2012-01-27
dc.identifier.uri http://hdl.handle.net/1912/5439
dc.description Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in Remote Sensing Letters 3 (2012): 729-736, doi: 10.1080/2150704X.2012.676741. en_US
dc.description.abstract With anticipated climate change, tundra fires are expected to occur more frequently in the future, but data on the longer term effects of fire on tundra vegetation composition are scarce. This study therefore addresses changes in vegetation structure that have persisted for 17 years after a tundra fire on the North Slope of Alaska. Fire-related shifts in vegetation composition were assessed from remote sensing imagery and ground observations of the burn scar and an adjacent control site. Early-season remotely sensed imagery from the burn scar exhibits a low vegetation index compared to the control site, while the late-season signal is slightly higher. The range and maximum vegetation index is greater in the burn scar, although the mean annual values do not differ among the sites. Ground observations revealed a greater abundance of graminoid species and an absence of Betula nana in the post-fire tundra sites, which is a likely explanation for the spectral differences observed in the remotely sensed imagery. Additional differences in vegetation composition in the burn scar include less moss cover and a greater cover of herbaceous species. The partial replacement of tundra by graminoid-dominated ecosystems has been predicted by the ALFRESCO model of disturbance, climate, and vegetation succession. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1080/2150704X.2012.676741
dc.subject Fire en_US
dc.subject Tundra en_US
dc.subject North Slope en_US
dc.subject Grass en_US
dc.subject NDVI en_US
dc.subject GIMMS en_US
dc.subject Vegetation shift en_US
dc.subject Succession en_US
dc.title Vegetation shifts observed in arctic tundra 1.5 decades after fire en_US
dc.title.alternative Vegetation shifts observed in arctic tundra 17 years after fire en_US
dc.type Preprint en_US
dc.description.embargo 2013-04-19 en_US

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